How to improve the sound of speakers
Methods to improve the sound of acoustics are often mentioned in glossy hi-fi-publications and the Internet. This article examines not only the already known methods of improving the sound of acoustics, but also methods previously unpublished anywhere that can significantly change the nature of the sound even budget speaker system.
Acoustic sound enhancement through reconstruction
Acoustics consists entirely of components, each of which plays a role in the final construction of the whole sound acoustics: it is the corps, the port of the phase inverter, speakers, internal wiring and crossover. By replacing any of these components with a higher quality, you can get positive changes in a certain area sound of yours acoustics.
The first thing you need to pay attention to in the construction of acoustics, is the quality of the corps. Quite often, and not only in the budget acoustics, the manufacturer economize on the quality of the corps, making the corps from thin particleboard, which create additional parasitic vibrations generated by the woofer. These the parasitic vibrations, return to the speakers, to crossover and internal wiring, which leads to a significant distortion of the original acoustic sound.
You can reduce the resonance of the case speaker, by strengthening the body with internal ties. Also, you can to smear the inner wall of the corps the viscous material such, as bitumen or to stick a special absorbing bitumen sheets. To reduce the resonance of the corps, also can be set ballast on the bottom of case - like special sand for filling acoustic and equipment rack.
Additionally, to reduce the mutually transmitted resonances of the components, can be used between the speakers, the crossover and the gasket corps made of viscous rubber or silicone. Some manufacturers, in the top-class acoustics use similar designs, for example, Jamo has its own system of mounting the tweeter to reduce vibration - Jamo DTT (Decoupled Tweeter Technology).
In addition to reducing resonances, the inside of the acoustics corps must be competently muffled, preferably a special materials available for this purpose, which will reduce the standing waves inside and will eliminate internal buzzing. It is also, useful to drown out the front side of the speaker, which will reduce the reflection of sound waves from the speakers and add to the sound of concentration and clarity. If a separate mid-frequency speaker with an open basket is installed in the speaker system, the open part of the basket must be muffled a special of cup, in order to avoid parasitic oscillations of the mid-frequency speaker cone by air waves created in the corps by the low-frequency speaker. A good example of making a quality case shows - Wharfedale Diamond 220c (Pic.).
But be careful, all manipulations described above, reduce the internal volume of the body, which can affect the depth of the bass.
Buzzing in the sound of acoustics can also create a poor-quality bass reflex port. Port of bass reflex is preferable a design optimum damping of air turbulence and the necessary a correct size: lengths and diameter, given the enclosure volume and acoustic design woofer. Incorrect design of the phase inverter port, also distorts low frequencies. For example in the B&W acoustics, used a phase bass reflex port of a special design is used which minimizes the turbulent effect - B&W-Flowport.
After the reconstruction of the housing acoustics, you can consider replacing the internal wiring and crossover of acoustics. For internal wiring, the best option is a copper cable of from multi-core fine section, corresponding to the level of sound of the speakers and well soldered in places of contact in order to avoid possible chatter when increasing the volume.
The crossover can be replaced with a higher quality and can be connected via bi-wiring or bi-amping method. Bi-amp (dual gain) connection is the preferred option, as it allows you to signal the speakers from two amplifiers bypassing the circuitry of the acoustics crossover. Connection by bi-amping scheme significantly smoothes the frequency response and is mandatory in professional sound.
Improving the sound of acoustics in other ways
Vibration coupling of audio components is one of the important keys in the construction of high-quality sound of any audio system. With the proper vibration insulation of the audio components it is possible to increase the sound by up to 40%, depending on from level of sound system.
Also in the sound of acoustics plays an important role vibration acoustics with the surface on which it is installed. Vibration isolation of acoustics is made by means of the accessories intended for this purpose: thorns, dampers, cones, etc., by installation on three or four support. But these accessories will be almost useless on the resonating surface. The surface on which the speaker system is installed should be maximally damped. Therefore, the acoustics bookshelf you need to install on the dedicated stands (Pic), tower acoustics can be installed on a concrete floor or on marble slabs.
It is possible to significantly change the sound of the speaker system by replacing the speaker cable. If the speaker system is top-end, then the speaker cable may need to be vibration isolation with a special cable channel. At the same time, the optimal length of the cable for connecting the speakers will be four meters with a small - this length of the cable is due to the best damping of vibrations. In cases of possible interference from nearby electronic devices, you can pay attention to the noise immunity (shielding) of the acoustic cable. Over time, the oxidation of the cable contacts, the speaker terminals and the amplifier can reduce the level of the original acoustic sound.
In addition to improving the acoustics, for optimal sound enhancement, you need to pay attention to the correct placement of acoustics in the room and the acoustic properties of the room. But this is a separate issue...