WO1995010163A1

WO1995010163A1 - Loudspeaker system

Info

Publication number: WO1995010163A1
Application number: PCT/JP1994/001649
Authority: WO
Inventors: Makoto Yamagishi; Yutaka Kagawa; Akihiro Akiyama; Kazuo Ichikawa
Original assignee: Sony Corporation
Priority date: 1993-10-01
Filing date: 1994-10-03
Publication date: 1995-04-13
Also published as: KR950704924A; JPH07107585A; CN1042087C; JP3371161B2; CN1116035A; KR100355481B1

Abstract

A loudspeaker system provided with a first baffle (2) fitted with a first loudspeaker unit (woofer unit) which reproduces sounds of a first frequency band and one or more second baffles (27L, 27R) fitted with second loudspeakers (tweeters and/or mid-range loudspeakers) which reproduce sounds of a second frequency band higher than that of the sounds reproduced by the first loudspeaker unit and formed smaller in size than the first baffle. The second baffles (27L, 27R) are placed a predetermined distance from the first baffle (2). The baffle effect is weakened, and consequently direct sounds directly produced by this loudspeaker unit are intensified as compared with indirect sounds reflected backward from baffle boards. The frequency characteristics of the system in an intermediate-frequency band are improved, and in addition, the system is also improved in sound image localization.

Description

Statement

Title of invention Speed system

Technical field

The present invention relates to a speaker power system configured to reduce the baffle effect of a speaker.

Skill

In general, the front panel of the cabinet is formed as a baffle plate, so that when the diaphragm of the speaker unit vibrates, the baffle plate prevents direct sound emitted directly from the front of the speaker unit. A baffle effect is generated by sound waves emitted backward.

Such a baffle effect will be described with reference to FIG. 1, which is a speaker system on which the present invention is based. In FIG. 1, reference numeral 101 denotes a cabinet constituting a speaker system, and a baffle plate 102 constituting a front plate of the cabinet 101 is formed in a square shape having one side L. Have been. The low sound speaker unit 103 and the middle and high speaker unit 104 are attached to the baffle plate 102. The length L of one side of the baffle plate 102 as described above is L. The value of f depends on the frequency, and reflects a high frequency in a given frequency due to the baffle effect. That is, the wavelength (wavelength) is given by

If one side of the above baffle plate 102 is L = 0.34 m, the velocity V of the sound wave is 340 m / sec, so for example, s = 2 x 0.34 = 0. The frequency at 6 8 111 is 1 ^: = / / 1 = 3 4 0 / ^/ 0.68 = 5 0 0 (H z).

In other words, for a notch of one side L = 0.34 m of the notch plate 扳 102, the sound pressure vs. frequency characteristic curve 105 in Fig. The reflected wave of the indirect sound reflected on the back of the full board 102 is added. In Fig. 2, the vertical axis shows sound pressure (dB) and the horizontal axis shows frequency (Hz). The frequency characteristic curve 105 shown by the solid line in Fig. 2 is reflected from the baffle plate 102, and peaks in the frequency characteristic curve 105 in the range from 500 Hz to 10 kHz. And a valley of about 6 dB. That is, the area indicated by the diagonal lines obtained by subtracting the solid line part from the part indicated by the dotted line 106 having no reflection is the part that causes the sound quality to deteriorate due to the baffle effect. In a high frequency band, for example, in a frequency band of 10 k or more, the baffle effect disappears, so that the frequency characteristic curve 105 is flat.

The present invention reduces the baffle effect generated by the baffle plate of the speaker system, increases the ratio of direct sound compared to indirect sound, improves the frequency characteristics in the midrange, and improves sound quality. The purpose is to obtain a speaker system.

Disclosure of the invention

According to the speaker system of the present invention, the first baffle having the bass speaker unit for bass is arranged at a predetermined distance from the second baffle having the treble or no sound and the middle sound speed unit. As a result, the baffle effect is reduced and the direct sound emitted from the direct speaker unit increases compared to the direct sound while the sound is emitted from the baffle plate to the back. The frequency characteristics in the frequency range are improved, and a sound image with excellent localization can be obtained.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a perspective view of a speaker system on which the present invention is based. FIG. 2 is a characteristic diagram showing frequency characteristics of the speaker system shown in FIG.

FIG. 3 is a front view showing the configuration of the speaker system according to the present invention. FIG. 4 is a side view showing the configuration of the speaker system according to the present invention.

FIG. 5 is a back view showing a configuration of a main part of the speaker system according to the present invention.

FIG. 6 is a perspective view showing a configuration of a main part of the speaker system according to the present invention.

FIG. 7 is a sectional view showing the internal structure of the speaker system according to the present invention.

FIG. 8 is a plan view showing a mounting structure of the second baffle. 9A to 9D show the structure of the cushioning member used in the speaker system of the present invention. FIG. 9A is a front view showing the configuration of the cushioning member. FIG. 9B is a side view showing the configuration of the cushioning member. FIG. 9C is a view of the cushioning member as viewed from the back. FIG. 9D is a sectional view taken along line AA ′ in FIG. 9A.

FIG. 10 is a view for explaining an example of a state in which the electronic device is supported by the cushioning member.

FIG. 11 is a diagram for explaining an example of a state in which the electronic device is supported by the cushioning member.

FIG. 12 is an explanatory diagram for explaining a pipe used in the present invention.

FIG. 13 is a cross-sectional view showing another example of the pipe.

FIG. 14 is a characteristic diagram showing frequency characteristics of the speaker system according to the present invention.

FIG. 15 is an explanatory diagram for explaining an operation state of the speaker system according to the present invention.

FIG. 16 is a circuit diagram showing a DC power supply circuit used in the speaker system according to the present invention.

Figure 17 is a table showing the characteristics and sound quality of various pipes. Figure 18 is a table showing the resistance and sound quality of various pipes.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the configuration of the speaker system of the present invention will be described in detail with reference to the drawings.

In FIGS. 3 to 5, numeral 1 indicates the speaker system of the present example as a whole. As shown in FIGS. 4 and 6, the front half 2A and the rear half 2B formed of a semi-cylindrical front and rear are combined with each other to form an elliptical flat surface as shown in FIG. It has a cylindrical shape having

The lower part 3 of the cabinet 2 is formed integrally with the bottom plate and is formed in an oval cylindrical shape smaller than the upper surface, and the front part of the lower part 3 of the cabinet 2 has a rectangular port in front of 2A. 4 is formed as shown in FIG. 7 along with FIGS.

First, the front half 2A constituting the cabinet 2 will be described with reference to FIGS. 3 and 4 along with FIG. 6, and the bass speaker built into the cabinet 2 above the port 4 will be described. That is, a power ON / OFF switch 7 is arranged in addition to the woofer level adjustment knob 5 and the master volume adjustment knob 6.

Also, on the rear surface of the rear half 2B constituting the semi-cylindrical portion, a rear projecting portion 8 for attaching input / output terminals is integrally formed as shown in FIGS. 4 to 6.

The rear projection 8 is formed in a substantially rectangular shape as viewed from the rear as shown in FIG. Corner portions 9L and 9R are formed on the left and right of the upper end of the rectangular portion 8A. The corners 9L and 9R have through holes 10L and 10R as shown in FIGS. 6 and 8, respectively, as viewed from above.

The rectangular portion 8A of the rear protruding portion 8 constitutes a first baffle. One channel of a bass speaker unit (woofer) for reproducing 50 to 200 Hz or described later. Configure a second baffle Power supply to drive the amplifiers for two channels of the speaker unit for high and middle frequencies of 200 Hz to 20 kHz (score and nose or tweeter). An output terminal (DIN terminal) 12 L and 12 R of an amplifier for driving the section 11 and the scooter and / or the tweeter is provided. Here, the first baffle corresponds to a cross-sectional area obtained by cutting the cabinet 2 along a plane parallel to the paper surface in FIG.

Further, as will be described later, the connecting bases 13 L and 1 to the housing in which the speed unit and / or the speed unit as the tweeter constituting the second baffle are housed. It has screw stoppers 14L and 14R for holding the 3R rotatably. Here, the second baffle is equivalent to a cross-sectional area obtained by cutting the housing containing the scale and / or the tweeter by a plane parallel to the plane of FIG.

In addition, a portable magnetic recording / reproducing device, a CD (Compact Disc) reproducing device, or a recordable / reproducible disk recording / reproducing device is provided in a substantially square concave portion 15 formed between both corners 9L and 9R. Connection terminal for connecting the output of a portable or small electronic device 30 and an amplifier in the cabinet 2 such as the RCA type pin connectors 17L and 17R. A DC power supply terminal 18 to the small electronic device 30 is attached.

Also, as shown in FIGS. 4 and 5, legs 18 L and 18 R having substantially the same height as the lower portion 3 are formed on the bottom surface of the rear projecting portion 8. On the upper surface of the cabinet 2 integrating the front half 2A and the rear half 2B, there is provided a cushion mounting part 19 consisting of an aluminum board 19A as shown in Fig. 3. . Rubber or other cushioning member 21a that is removably fitted to the through holes 20a, 20b, 20c, and 20d at four equal positions on the aluminum board 19A. , 21b, 21c, 21d are attached.

The cushioning members 21a to 21d are primary or secondary as shown in FIGS. When the portable or small electronic device 30 driven by a secondary battery or the like is placed on the cabinet 2, the vibration of the woofer 122 in the cabinet 2 is transmitted. This is to block the traffic. The structure of the cushioning members 21a to 21d will be described with reference to FIGS. 3 and 4 and FIGS. 9A to 9D.

First, aluminum which constitutes the cushioning material attaching portion 19 is formed on the upper plate 2C of the cabinet 2 formed by combining the front half 2A and the rear half 2B into a plane ellipse. Panel 19 A is installed. The shape of the aluminum plate 19 A is an elliptical shape substantially the same as the plane of the cabinet 2.

Elliptical holes 20a, 20b, 20c, and 20d are drilled on a predetermined circumference, for example, divided into four equal parts from the center of this aluminum plate 19A. I have. Buffer members 21a to 21d shown in FIGS. 9A to 9D are detachably fitted into these through holes 20a, 20b, 20c, and 20d.

Figs. 9A to 9D show the cushioning members 21a to 21d. 9A is a plan view of the cushioning members 21a to 21d, FIG. 9B is a side view, FIG. 9C is a bottom view, and FIG. 9D is a cross-sectional view taken along the line AA ′ of FIG. 9A.

The cushioning members 21a to 21d are formed in a substantially elliptical shape using rubber, emstroler, viscous rubber, or the like. The upper surfaces of the cushioning members 21a to 21d are in contact with the bottom surface of the electronic device 30 at a position eccentric from the center point 0, which is the intersection of the major axis and the short axis of the elliptical base 21e. Such protrusions 21 f are formed. The protruding portion 21 ί has a circular flat surface so that the compliance is larger than that of the base 21 e, and the cross-section is formed in a thin bellows shape in an inverted dish shape having a protruding portion in the center. On the back of the base 21 f, there is an engaging part 21g that fits with the through hole drilled in the cabinet 2 as shown in Fig. 9B to Fig. 9D. Two are provided at a predetermined distance from 0 at a predetermined interval. In addition, a three-month notch 21 h with a half thickness of the base is formed on the back surface opposite to the long brass where the protrusion 21 f is formed. The four cushioning members 21a to 21d as described above are inserted into the through holes 20a to 20d of the aluminum board 19A as shown in the sectional view of FIG. 4 and the plan view of FIG. When the protrusion 21 f is fitted outward, it is possible to mount a device having a relatively large bottom surface, such as the first portable electronic device 3OA. As shown in Fig. 11, if the protrusion 21 f is arranged inside and fitted, a device with a small bottom area such as the second portable electronic device 30B can be placed. I can do it. The three-month notch 21 h of the cushioning members 20 a to 20 d is removed while pressing this part, so that the through-holes 20 a to 21 A of the aluminum board 19 A are formed. It is formed so as to be easily detached from 20 d. The cushioning member may be made of not only rubber or the like but also a coil spring or a combination of rubber and a highly viscous oil.

The schematic internal structure of the cabinet 2 combining the front and rear halves 2A and 2B described above forms a bus 4 by forming a port 4 at the lower end of the cabinet 2 as shown in FIG. 'A reflex-cabinet (Bass-Reflex-Cabinet: abbreviated in this example as Baffle: Baff1e) is constructed.

In FIG. 7, reference numeral 23 denotes a notch plate, and a baffle plate 22 is attached to the baffle plate 23. A one-channel amplifier for the woofer 22 and a two-channel amplifier for driving a speaker unit housed in a housing to be described later are also built in the cabinet 2, although not shown.

Next, the configuration of the connecting bases 13L and 13R will be described. The connecting bases 13L and 13R are formed of a synthetic resin, and are formed in a cylindrical shape with a rounded head. The cylinder head is inclined from one side to the other side below. Holes 25 L and 25 R, and pipes 26 L and 26 R are inserted and fixed to one end of the cylinder head. This through-hole 25 L and

The other through-holes 25 L 'and 25 R' penetrating below 25 R have leads 12 L 'and 12 R' derived from the pump output terminals 12 L and 12 R ', respectively. It is inserted and passes through the pipes 26L and 26R, and moves in the housings 27L and 27R shown in FIGS. 3 and 4 as a single force or a switch as a tweeter. Connected to the peaker unit.

Further, as shown in FIG. 5, stepped portions 28L and 28R are formed in the lower columnar portion of the connecting base portions 13L and 13R, and the corner portions 9L and 9R shown in FIG. Are rotatable in the through holes 10 L and 1 OR. At the lower ends of the steps 28L and 28R, the strings 29L and 29R made of Ω-shaped metal or the like are attached.

A semi-circular shaft insertion hole is formed upward on the bottom surface of the steps 28 L and 28 R, and a shaft having a semi-circular cross section is formed in the shaft insertion hole. The shaft is inserted and the shaft is fixed to the connection bases 13R and 13L with the screws 31L and 31R. The tip of this shaft is rotatable with respect to the couplings 32L and 32R. At the lower ends of the couplings 32L and 32R, flat fixed shafts 33L and 33R, which are obtained by shaving both ends of the shaft in the longitudinal direction, are fixed. Through holes were drilled in 3L and 33R to form taps 34L and 34R.

According to the connecting bases 13 L and 13 R configured as described above, the fixed shaft 3

If 3 L and 33 R are fixed, the shaft that surrounds the connection bases 13 L and 13 R can be freely rotated clockwise or counterclockwise from the top of the couplings 32 L and 32 R. Move.

Therefore, the fixed shafts 33 L and 33 R of the connecting bases 13 L and 13 R are formed in the rectangular holes 10 L and 10 R of the corners 9 L and 9 R shown in FIG. Insert it into the fixing hole 35 and the back of the rear half 2B shown in Fig. 5 If the screws are inserted through the screw stoppers 14 L and 14 R formed on the surface and fixed to the taps 34 L and 34 R of the fixed shafts 33 L and 33 R,- The connecting bases 13L and 13R containing the baffles 27L and 27R and the pipes 26L and 26R can be rotatably attached to the cabinet 2. Conversely, by taking the screws of the screw fixing portions 14L and 14R, the housings 27L, 27 are provided for the first and second baffles, that is, for the cabinet 2. R can be made detachable. In particular, it is possible to reduce the size by packing the product in a detached state during transportation.

Also, as shown in Fig. 8, locking portions 36 are formed in the through holes 10L and 1OR of the corners 9L and 9R, and both ends of the flanges 29L and 29R are locked. The horizontal rotation angles of the connecting bases 13L and 13R are regulated to be within a predetermined angle range by abutting on the locking ends 37 and 38 of the part 36.

That is, the second baffles 27L and 27R are rotated in the horizontal direction of A-A 'as shown in FIG. 3 by rotating the connecting bases 13L and 13R clockwise CW or counterclockwise CCW. Can be moved over a predetermined range.

Next, the pipes 26L and 26R connecting the first and second baffles used in the speaker system will be described. Fig. 12 is a cross-sectional view taken along the line B-B 'in Fig. 3. Pipes 26L and 26R are hollow cylindrical by mixing carbon fiber in epoxy resin and sintering. It has been molded into a pipe. As shown in Fig. 13, the pipes 26L and 26R have thicker through holes 25L and 25R on the connecting bases 13L and 13R, and the second baffle 2 The taper-shaped hollow pipe 61 may be formed by narrowing the side on which the 7 L and 27 R scales and / or the tweeter are pivoted.

Pipes 26 L and 26 R as such an intermediate support are light. It is hard and requires moderate internal loss. That is, the sound speed (v “(

E / p): E Young's modulus, p: Density) is high, and Q (resonance sharpness) is desired to be low. Hollow pipes and carpet fibers mixed with the above-mentioned carbon fiber The vibration pipe sufficiently satisfies these conditions, as shown in Figure 17.

The strength and elastic modulus of the carbon fiber composite material mixed with the above-mentioned carbon fiber vary depending on the manufacturing method, but generally carbon fiber such as laeon or polyacrylonitrile fiber is carbonized in an inert atmosphere. And then graphitized.

Further, although the physical quantities are not shown in Fig. 17, the tungsten wire and the like are degassed and added to the reactor to obtain boron filaments continuously. Resin etc. combined to form a pipe, P-phenylenediamine and polyamide fiber obtained from terephthalic acid, etc. (Dupont's trademark Kepler) etc. Can be mixed with an epoxy resin, or a hollow pipe in which glass fiber or the like is mixed with an epoxy resin.

Further, if the pipes 26L and 26R formed in the hollow shape shown in FIG. 12 are metals such as iron pipes shown in Table 1, the distance between each speaker unit and the drive circuit is reduced. The magnetic flux 63 generated by the current flowing through the connected leads 12 L 'and 12 R' induces an overcurrent in the metal rope, and the reverse current is applied to the leads 12 L 'and 12 R'. There was a problem that a magnetic field was generated by an electromagnetic induction effect such as passing a current, which affected the output current to the speaker unit, and eventually deteriorated the sound quality. On the other hand, if a hollow pipe having a predetermined resistance value, such as a carbon fiber pipe or a Kepler pipe, is used as in this embodiment, the above-described cause of sound quality deterioration due to electromagnetic induction can be avoided. You can do this. Figure 18 shows the sound quality of the resistance value of such a pipe.

Note that in Figs. 17 and 18, the sound quality is indicated by pipes 26 L and 26 R. 音 indicates good sound quality when passed through, Δ indicates slightly good, and X indicates poor state.

Here, the lengths of the pipes 26L and 26R are selected as follows. If the length of the pipes 26 L and 26 R is too short, the housing 27 L and 27 R will approach the cabinet 2, resulting in a stereo sound in the reproduced sound. The sound output from the first car 22 stored in the cabinet 2 interferes with the housing 27 L and 27 R. If the lengths of the pipes 26L and 26R are too long, the distance between the housing 27L and the housing 27R is too large, and the stereo feeling cannot be obtained. Therefore, the length of the pipes 26 L and 26 R is such that a good stereo feeling can be obtained when the listener hears the sound reproduced from the speaker system, and the sound reproduced from the woofer 22 is how long. It is sufficient that the distance does not interfere with the ring 27 L and 27 R.

Next, the housings 27L and 27R attached to the tips of the pipes 26L and 26R will be described. The housings 27 L and 27 R have a long axis with a diameter of about 100 mm, and the front faces are elliptical and spherical. The housings 27 L and 27 R have high and medium tone speaker units. Is built-in. No ,. The housings 27 L and 27 R at the ends of the Eve 26 L and 26 R are centered on the axes 41 L and 41 R in Fig. 4 from the back side of the paper to the front side or from the front side to the back side. It is mounted to be rotatable. Therefore, in FIG. 3, the housings 27L and 27R can swing horizontally in the horizontal direction around the pipes 26L and 26R. Although not shown, the housings 27L and 27R are provided with mounting plates on which the speaker units constituting the scale and the tweeter are formed on the housings 27L and 27R, respectively. Can be mounted from the front side. On the front side of the housing 27L and 27R, a thin protective member is provided to protect the sound emission side of the speaker unit. It is attached. As described above, the second baffle is a cross-sectional area of the housings 27L and 27R cut along a plane parallel to the paper surface in FIG.

According to the speaker system of the present invention having the above-described configuration, the housings 27L and 27R each having a built-in speaker unit for middle and high frequencies have a major axis diameter of about 10 O mm. L = 0.1 m, and in the case of this example, the wavelength S is 2 = L = 2 X 0. 1 = 0.2 m, as described with reference to Fig. 1. Therefore, the frequency f is V nos = 3 4 0 70.2 = 1700 (Hz).

Therefore, the first and second buffers are separated in this manner, and the length of one side of the cross section of the first notch, that is, the cabinet 2 is L = 0. When the length is 34 m, the length of the major axis of the cross section of the second baffle, that is, the housings 27 L and 27 R, is set to L = 0.1 in comparison with the first bath 2. If it is made as small as m, the frequency characteristic curve 105a taking into account the direct sound and the indirect sound (reflected wave) will be as shown in Fig.14. In the speaker system according to the present invention, the area of the hatched portion of the difference between the direct sound and the indirect sound can be reduced to half or less as compared with FIG. That is, the reflected wave of the indirect sound, which is the cause of the sound quality deterioration, is reduced, and the buffling effect can be reduced, so that faithful sound quality reproduction can be performed. In the above case, the L of the first baffle was set to 0.34 m, but it was confirmed that a sufficient effect can be obtained even if L = 0.2 m, which is about twice that of the second baffle. .

Furthermore, since the first and second baffles are integrated via a pipe, the installation area can be reduced by about 1/4 compared to a small combo or the like.

Figure 15 shows a plan view of the speaker system of this example. As shown in Fig. 15, the listener 50 located in front of the speaker system 1 moves the housing 27 L against the connecting base 13 L and the pipe 26 L. Rotating clockwise CCW, housing 27R is also rotated clockwise CW with respect to connecting base 13R and pipe 26R, and brought to a position close to listener 50's ear. Suppose. For example, assuming that the distance between the ears and both second baffles 27L and 27R is closer to 2 δ cm, the distance from the normal mid-high speaker to the listener 50 and the minimum lm is assumed. In the example, 20 log 1 0 0/25 = 12 dB, and if the volume from the speed unit is the same, you can hear a loud sound of 12 dB. Conversely, if the volume is the same, in this example, the volume can be reduced by 12 dB, so that a sound leakage (noise) volume to the outside can be reduced.

FIG. 16 shows a DC power supply circuit for an amplifier built in the above-mentioned cabinet 2. In FIG. 16, reference numeral 51 denotes a plug derived from the power supply connection portion 11 provided on the rear protruding portion 8 shown in FIG. 5, which is connected to a commercial power supply and has a primary power transformer T for the amplifier. The commercial voltage is supplied to the side T ,. In the present example the secondary winding T ₂ to be supplied to the DC power source supply terminal 1 8 of the secondary winding T ₃ separately from the rear projecting portion 8 for amplifiers that winding to the power supply preparative lance T It is provided. The secondary voltage from these secondary windings Τ ₂ and は₃ is converted to a DC voltage of, for example, 4.5 V via rectifying blocks 52, 53 and smoothing circuits 54, 55 to form a DC power supply. Supply terminals 18 and 9 DC voltage are supplied to the amplifier circuit.

Incidentally, Doo La secondary winding T DC- DC co a DC voltage of 9 V is supplied to the amplifier circuit as shown ₂ also no winding by a broken line for supplying Nsu the T to the DC power supply terminal 1 8 The converter 56 may perform DC-DC conversion to obtain a DC voltage of 4.5 V. If the amplifier is driven by a battery, the battery voltage may be supplied to a DC power supply terminal 18 using a DC-DC converter 56.

From such a DC power supply terminal 18 to a portable electronic device 30, 30 A, 30 B DC input terminals are simply connected so that they can be supplied to the DC power supply of electronic equipment 30, 3 OA, 3 OB using an AC adapter or the like. The connecting wires can be gathered together on the back side of G2. In this case, of course, connection terminals (pin connectors) 17 L and 17 R connecting the output terminals of the portable electronic devices 30, 30 A, 30 B and the amplifiers in the cabinet 2 are connected. A connecting line between them is also required.

In the above-described speaker system of the present invention, the case where the cushioning member is mounted on the cabinet that stores only the woofer has been described, but it may be mounted on a general speaker cabinet. Is clear.

Also, in the above-mentioned speaker system, the antenna is housed in the cabinet, but the sound reproduced by the woofer is a sound of a low-frequency component, and thus has directivity. Absent. Therefore, as in the above-described embodiment, the woofer does not need to be disposed at the center of the pair of scales and / or the tweeter, but under one of the scales and / or the tweeter. May be arranged.

According to the speed system of the present invention, the second baffle is made smaller than the first baffle, and is arranged at a position separated from the first baffle, so that the baffle effect can be reduced and the sound quality can be improved. A speed-up system with a good balance is obtained.

Further, since the first baffle and the second baffle are separated from each other via a pipe and integrated, a device that can have an extremely small installation area compared to a small component or the like can be obtained.

Claims

The scope of the claims

1. a first baffle with a first speaker unit for reproducing sound in a first frequency band;

A second speaker for reproducing a sound in a second frequency band higher than the first speaker unit is attached, and at least one speaker formed to be smaller than the first baffle. With two second baffles,

A speaker system, wherein the second baffle is arranged at a predetermined distance from the first baffle.

2. The speaker system further comprises an arm-shaped member, wherein the first baffle and the second baffle are connected by the arm-shaped member. Speaker system according to clause 1.

3. The method according to claim 2, wherein the arm-shaped member is formed of a material having a sound velocity of 500 Om / sec or more and a resonance sharpness of 500 or less. Speaker system as described in section.

4. The speaker system according to claim 2, wherein the arm-shaped member is formed of a material mixed with carbon fiber.

5. The speaker system further includes a cabinet in which the first baffle is mounted, and a duct for connecting the cavity on the rear side of the first speaker unit to the outside. The speaker system according to claim 1, wherein the speaker system is provided.

6. The speaker system further includes a casing in which the second baffle is attached, and one end is attached to the cabinet and the other end is attached to the casing. It has an arm-shaped member attached to the ring. The speaker system according to claim 5, wherein

7. The above-mentioned arm-shaped member is characterized by being formed so as to be hollow using a material having a sound velocity of 500 m / sec or more and a resonance sharpness of 500 or less. The speaker system according to claim 6, wherein:

8. The speaker system according to claim 6, wherein the arm-shaped member is formed of a material mixed with carbon fiber.

9. The speaker system further includes a first rotation supporting the arm-shaped member between the arm-shaped member and the cabinet so as to be rotatable with respect to the cabinet. A second support for rotatably supporting the casing with respect to the arm-shaped member between the arm-shaped member and the casing. 7. The speaker system according to claim 6, further comprising a dynamic support portion.

10. The speaker system according to claim 5, wherein a cushioning means for attaching an electronic device is provided on an upper surface portion of the cabinet.

11. The shock-absorbing means is constituted by a plurality of shock-absorbing members, and a support portion for supporting the electronic device of the shock-absorbing member is formed at a position eccentric from the center of the shock-absorbing member. The speaker system according to claim 10.

12. A baffle plate to which the first speaker unit for low frequencies is attached,

The above-mentioned baffle plate is arranged in the inside thereof, and a port is provided for communicating the cavity on the back side of the above-mentioned first speaker unit with the outside, and constitutes the first baffle. A cabinet and a second mid-range or high-range speaker unit At least one casing formed to be smaller than the first baffle and forming a second notch;

A speaker system, characterized in that one end is attached to the cabinet and the other end is provided with an arm-shaped member attached to the casing.

13. The arm-shaped member is formed so as to be hollow, and a drive circuit for driving the first and second speaker units is provided in the cabinet. The driving circuit and the second speaker unit are connected by a signal line provided in the arm-shaped member. Speaker system as described in section.

14. The speaker system according to claim 13, wherein a DC voltage output terminal is provided in the cabinet.

15. The speaker system according to claim 14, wherein a part of the DC voltage supplied to the drive circuit is supplied to the DC voltage supply terminal under voltage control.

16. The arm-shaped member is formed of a material having a sound velocity of 500 Om / sec or more and a resonance sharpness of 500 or less. The speaker system according to paragraph 2.

17. The speaker system according to claim 12, wherein the arm-shaped member is formed of a material mixed with carbon fiber.

18. The speaker system further includes a first rotation supporting the arm-shaped member between the arm-shaped member and the cabinet so as to be rotatable with respect to the cabinet. A second support for rotatably supporting the casing with respect to the arm-shaped member between the arm-shaped member and the casing. Claim 1 characterized by comprising a dynamic support portion. Speaker system described in section.