IT202100007736A1 - SEMI-AMPLIFIED HI-FI SPEAKER FOR ELECTRIC AND/OR ACOUSTIC BASS - Google Patents

Description

Description of the invention entitled:

?SEMIAMPLIFIED HI-FI SPEAKER FOR ELECTRIC AND/OR ACOUSTIC BASS?

Description

field of technique

The present invention operates in the field of the production of sound reproduction devices and, more in particular, to a high quality device? for electric and/or acoustic bass. even more specifically the present invention ? aimed at reproducing bass both in the professional and instrumental field, and purely HI-FI, using a passive bass line and an active/passive mid-high line.

Known art

Usually a loudspeaker system adopts a plurality? of different heights of sound using a plurality? of different types of loudspeakers (for example, woofers, mid-range loudspeakers, high-range loudspeakers, etc.). What has just been described? possible through the use of a passive crossover ? connected to the amplifier output and provides each speaker with a different sound frequency.

Some guitar speakers often use a single driver and are often not high fidelity. Also, when playing a bass, ? can't play a high quality playback device? sound (Hi-Fi system) without damaging the speaker at a high output level. As a result, the configuration of most bass amps is ? often limited to using only large woofer speaker elements, resulting in unclear playback sound. A normal guitar amp, which often has two or more amplifiers. speakers, has a low quality? of bass and ? subject to noise disturbances and distortion.

Many guitarists and bassists require clear, loud sound over a wide range (particularly a range from at least 40 Hertz to 10,000 Hertz, preferably 35 Hertz to 15,000 Hertz). Can you? affirm that this requirement ? especially important for an instrument such as the acoustic bass, which requires high-output low-frequency reproduction as well as mid- and high-frequency reproduction for clear sound.

A solution to this problem? proposed by patent application US7436967B2 of . Within said patent a method is described for limiting the power applied to a loudspeaker, in which both the voltage and the current applied to the loudspeaker are measured. In addition, the instantaneous power is calculated directly and used to control the level of the input signal driving the amplifier and powering the loudspeaker. When the power applied to the loudspeaker exceeds a prescribed threshold, the input level to the power amplifier is reduced until the measured power does not fall below the threshold. Also disclosed is a method of indirectly determining the voice coil temperature from speaker voltage and current and reducing power to the speaker when the temperature exceeds a prescribed threshold. The power level is actively controlled to avoid speaker damage and to minimize audible artifacts.

Another example is provided by the patent application JP2010093800A of The invention provides an apparatus and a circuit capable of reproducing a wide range of sounds with high quality. without causing damage to a speaker even when a low range of sounds is reproduced at a high output, and capable of reproducing a medium range of sounds and a high range of sounds with clear sound. Specifically, it presents a multi-speaker system capable of processing an input signal of a bass, a first amplifier, a second amplifier capable of reproducing the entire sound range, a woofer connected to the first amplifier, a full range speaker connected to the second amplifier to reproduce the full range, a first circuit to selectively input low range to the woofer and high energy low range is sent to the full range speaker.

Purpose of the present invention? that of proposing a speaker with innovative and extreme characteristics for the reproduction of the low range, for which two distinct but perfectly and synergistically integrated lines (bass line and mid-high line) have been adopted. This configuration does not advantageously commit the musician to often arbitrary and expensive compositions beyond of the result then achieved, obtaining a device with input switch, cross over, gain and frequency selector.

Description of the invention

According to the present invention an advantageously economical and qualitatively superior solution is provided for the design and production of sound reproduction devices, in particular the reproduction of basses both in the professional and instrumental field, and purely HI-FI. The present industrial invention patent application advantageously adopts the use of two distinct, but perfectly and synergistically integrated sound lines: ? a purely passive bass line; And

? a mid-high mid line alternately active/passive, with switch, cross over, gain and frequency selector input.

In this way, this configuration allows the professional not to resort to often arbitrary and expensive compositions beyond the of the result then achieved.

Specifically, the bass line according to the present patent application is composed, instead of a single transducer for the bass (woofer), by a pair of woofers (even not equal in size and power), reversed but, clearly, with movement synchronous (same impulse, same direction).

Said device, differently from the ?Push-Pull? in pneumatic and/or isobaric suspension (bass reflex), it presents an advantageously original arrangement in which the transducers are placed in counter-phase and reversed with respect to the aforementioned configurations, ie with the magnets facing each other. Said transducers are preferably of different size and power and are installed inside the device in such a way that the internal transducer will be? more and more bigger and more powerful than the external one. In order to achieve the qualitative results proposed by this device, also for reasons of physical space, isn't it? it is necessary that the two transducers have substantial differences in terms of size and power; for example, said device, in one of the preferred embodiments provides an internal 12?? (inch) transducer and an external 10??.

Said particular arrangement of the two transducers allows the rear part of the pi? large to push the external transducer, pi? small, with much better dynamics; moreover, said internal transducer, being of superior dimensions and power, will be able to give acceleration more? full-bodied and congruous to the flow in the reflex tube.

Inside said internal transducer sar? preferably place an inductance suitable for obtaining a cut starting from 6 dB (decibel) so as not to subtract medium and/or medium-bass from the external transducer.

Said inductance pu? be installed on the outside of the internal transducer. This inductance? to improve fidelity? and deep sound detail. Said Hi-Fi speaker also has a bass reflex internal flow output system generated by the internal transducer, preferably installed in the lower part of the device.

Said internal flow outlet system is, in fact, a solution based on the study of discoveries obtained mainly from the concepts of Bernoulli equation and Venturi principle, as well as on the method of obtaining laminar flow. Said internal flow outlet system provides:

? a multiplicity? of coaxial pipes of different diameters (increasing towards the outside) capable of interacting in their particular configuration, exactly like vacuum pumps for obtaining absolute vacuum;

? at least one air intake, near one of the side panels of the device, able to put the inside of the device in communication with the outside.

The number of tubes used for this system increases in relation to the size and power of the source (internal transducer): for example for a 12?? two tubes can be installed, while for a transducer of 15?? three pipes. This system allows the internal transducer to recover the rear emission with great thrust, much more? that the normal bass-reflex, even the pi? advanced.

This solution allows the flow coming from the internal transducer to have a greater consistency, thus allowing to the low and very low range (for example 20/130 Hz, the most critical and expensive in terms of energy and stress on the part of the device) to be reproduced with a minimum of power; Said solution? therefore suitable to avoid distortions due to phase shifts of the return from the amplifier itself.

According to the present invention, the quantity of outgoing air? visibly higher than that of? input: this ratio ? given by the speed? of the impulse and above all from the configuration of the device.

In one of the preferred embodiments said pipes have inside them a septum installed along the diameter, suitable for optimizing the flow and making it as smooth as possible. possible to lamellar.

This device can advantageously be equipped with one or more? systems for the escape of the internal flow.

Through the installation of a gain, a crossover, a terminal holder flange and at least one mid-high transducer, the Hi-Fi speaker admirably completes the entire spectrum for the reproduction of the instrument used, a condition that more and more? proves necessary to the modern professional musician. Preferably said mid-high transducer ? installed in the upper part of the device and ? separated, through internal baffles, both from the two bass transducers and from the flow outlet system.

The device also provides for the installation of a switch through which the user will decide? if you use the internal amplification of the mid-highs, don't use it at all, or use an external amplifier (perhaps with valves), as long as? the signal is already? filtered bass.

In one of the preferred embodiments said invention can foresee the installation of a tweeter for the reproduction of the high frequencies of the audio range. Said tweeter ? preferably installed in the immediate vicinity of said medium-high transducer and therefore separated from the bass transducer and from the flux outlet system.

In one of the preferred embodiments a septum, of variable height, spirally formed, rigid and of non-resonant material? installed between the internal transducer and the external transducer, able to cancel the pi? possible internal chaotic fluctuations, thus optimizing? the same effect of outflow of the flow and decreasing the wear due to the work of the membrane of the internal transducer. Advantageously the Hi-Fi speaker can? include a handle designed to make it more? easy to transport. This handle can preferably be installed either in the upper external part or in the two external side parts. Said handle? preferably in fabric, but also in leather, eco-leather and rubber.

The present invention is suitable for every possible need of genre and use, Jazz, Rock, Pop and Ethnic, Classical Music and its use? suitable for any closed environment, such as a domestic or local environment, and for any open environment, such as a stage or a square.

This device not only makes it possible to obtain a substantial volumetric increase in the bass, but also an increase in the bass extension of the range, necessary for instruments with six or more strings. ropes, now in normal use. This feature allows this device to be used not only for electric/acoustic bass, but, without any limit, by guitarists, singers or multi-instrumentalist, obtaining, with great cost savings, a qualitatively better result than traditional compositions.

The advantages offered by the present invention are evident in the light of the description set forth up to now and will be even more clear thanks to the annexed figures and the relative detailed description.

Description of the figures

The invention will come described hereinafter in at least one preferred embodiment by way of explanation and not of limitation with the aid of the accompanying figures, in which:

FIGURE 1 shows the front elevation of the semi-amplified Hi-Fi speaker 100 according to an embodiment;

- FIGURE 2 shows a lateral section of the semi-amplified Hi-Fi speaker 100 according to an embodiment;

FIGURE 3 shows a top section of the semi-amplified Hi-Fi speaker 100 according to an embodiment;

FIGURE 4 shows a side elevation of the semi-amplified Hi-Fi speaker 100 according to one embodiment, when the removable wheels 21 are in operation.

Detailed description of the invention

This invention will come now illustrated purely by way of example but not in a limiting or binding way, making use of the figures which illustrate one of the embodiments with respect to the present inventive concept.

With reference to FIGS. 1, 2, 3 and 4 show the main components of a semi-amplified Hi-Fi speaker 100 according to the present invention. In FIG.1 the internal elevation of the present invention is shown; in FIG. 2 a side section showing the components and internal structure of the semi-amplified Hi-Fi speaker 100 according to one of the embodiments; in FIG. 3 an internal section of the invention seen from above; while in FIG. 4 is a side elevation of the semi-amplified Hi-Fi speaker 100, when the extractable wheels 21 are in operation.

Said semi-amplified Hi-Fi speaker 100 comprises an external transducer 10 of 12?? and an internal transducer 18 by 15??, installed in the upper part of said semi-amplified Hi-Fi speaker 100, suitable for reproducing low sound frequencies. Said external transducer 10 and said internal transducer 18 are placed in push-pull and with the magnets 16-17 facing each other. Said internal transducer 18 also suitable for introducing the flow inside said semi-amplified Hi-Fi speaker 100. Said flow is transported outside through a double flow outlet system 24, installed in the lower part of said Hi-Fi speaker semi-amplified 100. Said flow outlet system 24, composed of an internal pipe 19 and an external pipe 11 and exploiting an air intake 23, is adapted to allow the flow coming from the internal transducer 18 to have a greater consistency thus allowing? low and very low range to be reproduced with a minimum of power. Said flow outlet system 24 allows to decrease any distortions of the sound. Said inner tube 19 has a smaller diameter than the outer tube 11, and is? coaxial with respect to said external tube 11.

Said internal tube 19 and said external tube 11 are both equipped, along the diameter, with an internal septum 12 suitable for optimizing the outflow of the flow and making it as smooth as possible. possible to lamellar.

Said semi-amplified Hi-Fi speaker also comprises a tweeter 13 and a mid-high transducer 14 Midrange of 6?? suitable for the reproduction of medium and high sound frequencies. Said tweeter 13 and said medium-high transducer 14 are installed in the upper part of said semi-amplified Hi-Fi speaker 100, in an internal space 26. Said tweeter 13 and said medium-high transducer 14 can be activated/deactivated via a switch 25 , installed in the rear part of said semi-amplified Hi-Fi speaker 100. Said switch 25 allows to use a further external amplifier (not shown in the figure). Said tweeter 13 and said mid-high transducer 14 are adjustable through a gain and/or a crossover 22.

Said semi-amplified Hi-Fi speaker 100 comprises a terminal holder flange 20, installed in the rear part.

Said semi-amplified Hi-Fi speaker 100 comprises a handle 15, installed in the upper part and four extractable wheels 21, installed in the lower part. Said extractable wheels 21, when not used, are engaged in suitable hollow spaces obtained in a part of the thickness of the base of said semi-amplified Hi-Fi speaker 100.

? finally, it is clear that modifications, additions or variations that are obvious to a person skilled in the art can be made to the invention described up to now, without thereby departing from the scope of protection which ? provided by the appended claims.

Claims (11)

Claims 1. Semi-amplified Hi-Fi speaker (100) for electric and/or acoustic bass, characterized by the fact that it includes: - at least one external transducer (10), capable of reproducing low sound frequencies externally, installed in out-of-phase with respect to the internal transducer (18), ie with the magnets facing each other (16-17); - at least one said internal transducer (18), capable of reproducing low sound frequencies internally; - at least one bass reflex flow outlet system (24), installed in the lower part of said semi-amplified Hi-Fi speaker (100), able to allow the flow coming from the internal transducer (18) to exit outside of said speaker semi-amplified Hi-Fi (100) and to have a greater consistency, thus allowing? to the low and very low range to be reproduced with a minimum of power; said flow outlet system (24) comprising a plurality of coaxial pipes, with diameter increasing outwards, able to exploit at least one opening (23) obtaining the principle of absolute vacuum; - said at least one opening (23) suitable for introducing air into said semi-amplified Hi-Fi speaker (100); said opening (23) being placed along the side walls of said semi-amplified Hi-Fi speaker (100); - at least one medium-high transducer (14) capable of reproducing medium-high sound frequencies outdoors; said medium-high transducer (14) being placed in an isolated internal space (26); - at least one switch (25) able to activate/deactivate said medium-high transducer (14); said switch (25) installed in the rear part of said semi-amplified Hi-Fi speaker (100); - at least one terminal holder flange (20), installed in the rear part of said semi-amplified Hi-Fi speaker (100), able to connect musical instruments to said semi-amplified Hi-Fi speaker (100). 2. Semi-amplified Hi-Fi speaker (100) for electric and/or acoustic bass, according to the preceding claim 1, characterized in that said internal transducer (18) has a larger size and power than said external transducer (10). 3. Semi-amplified Hi-Fi speaker (100) for electric and/or acoustic bass, according to the preceding claim 1 or 2, characterized in that said internal transducer (18) ? equipped with an inductance such as to safeguard the medium and medium-low sound frequencies produced by said external transducer (10). 4. Semi-amplified Hi-Fi speaker (100) for electric and/or acoustic bass, according to any one of the preceding claims, characterized in that said plurality? of coaxial pipes of said flow outlet system (24) are equipped, along the diameter, with a septum (12); said septum (12) being able to optimize the outflow of the flow of said internal transducer (18) and make it lamellar. 5. Semi-amplified Hi-Fi speaker (100) for electric and/or acoustic bass, according to any one of the preceding claims, characterized in that said flow outlet system (24) suitable for improving sound clarity, eliminating the distortions produced by the flow of said internal transducer (18). 6. Semi-amplified Hi-Fi speaker (100) for electric and/or acoustic bass, according to any one of the preceding claims, characterized in that it comprises a tweeter (13) suitable for reproducing high sound frequencies; said tweeter (13) being connected to said switch (25) and installed in said isolated internal space (26). 7. Semi-amplified Hi-Fi speaker (100) for electric and/or acoustic bass, according to any one of the preceding claims, characterized in that it comprises a gain and/or a crossover (22) suitable for regulating and filtering the mid- produced by said mid-high transducer (14) and/or said tweeter (13). 8. Semi-amplified Hi-Fi speaker (100) for electric and/or acoustic bass, according to any one of the preceding claims, characterized in that said switch (25) ? connectable to an external amplifier. 9. Semi-amplified Hi-Fi speaker (100) for electric and/or acoustic bass, according to any one of the preceding claims, characterized in that it comprises a septum adapted to cancel the most? possible internal chaotic fluctuations, thus optimizing? the same effect of said flow outlet system (24) and decreasing the wear due to the work of the membrane of said internal transducer (18); said septum being of variable height, spirally formed, rigid and of non-resonant material; said septum being installed between said internal transducer (18) and said external transducer (10). 10. Semi-amplified Hi-Fi speaker (100) for electric and/or acoustic bass, according to any one of the preceding claims, characterized in that it comprises at least one handle (15) suitable for allowing transport; said handle (15), made of textile material, leather and/or eco-leather and rubber, installed on the external surface of said semi-amplified Hi-Fi speaker (100). 11. Semi-amplified Hi-Fi speaker (100) for electric and/or acoustic bass, according to any one of the preceding claims, characterized in that it comprises extractable wheels (21) suitable for allowing transport over long distances; said extractable wheels (21), being installed in the lower portion of said semi-amplified Hi-Fi speaker (100), when not in use, being engaged in suitable hollow spaces obtained in a portion of the thickness of the base of said semi-amplified Hi-Fi speaker (100) .