Audison SR 4.500 amplifier

Name: Audison SR 4.500 amplifier
Brand: Audison
Price: 389.90 EUR
Availability: InStock
Rating: 5.0000 (2 reviews)

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4-channel, 4 x 130 / 2 x 480 W RMS into 4 Ω / 4 x 220 W RMS into 2 Ω, ADT class
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Audison SR amplifiers - high performance, compact size and modern design

The new Audison SR amplifiers have the highest performance in their history, but they are also the smallest in the history of the SR series, thanks to the unique Audison d_class technology or "Audison ADT". Audison's Potenza Picena-based design team spent a long time planning and perfecting the upcoming SR range. Audison SR amplifiers take full advantage of the features and technology available today. After numerous listening tests (with eyes closed) with professionals and enthusiasts, the research and development team decided to develop a new D-class technology called ADT (Audison D-Class Technology) for the entire Audison SR range, which made it possible to significantly reduce the size of the amplifiers and, in turn, increase the performance . When it comes to the electronics design itself, Audison's development center took care of the smallest aesthetic and functional detail and designed a compact amplifier that is made of extruded aluminum with rounded corners that facilitate the installation of the amplifier even in tight spaces. Thanks to generous heatsinks on both short sides of the amplifiers, internal cooling fans are not needed, which often cause noise and dust accumulation.

Convenient control of the amplifier on the upper part, USS system

Traditional for SR amplifiers is their versatility. On all models, it offers a full section of filters and settings that are suitable for any type of audio system configuration. The controls, which are protected by a satin aluminum panel (fixed by 2 screws), are located on the top panel of the amplifier so that they are easily accessible from above even after installation. If the system includes an Audison bit processor, the filter section can be completely omitted and does not need to be used. Using Audison USS (Universal Speakers Simulator) technology in the high-level inputs, Audison SR amplifiers can also be optionally connected to original car radios that have a "speaker load detection" function that monitors the presence of low-impedance loads. This activates the outputs.

Unlimited connection options

All models of Audison SR amplifiers are equipped with HI-INPUT inputs for connecting to the speaker output of OEM units and LOW-INPUT (classic RCA) for standard connections. When using the HI-INPUT input, the ART (Automatic Remote Turn-On / Off) function can be activated to control the switching of the amplifiers using the power button of the main unit. In addition, there is a remote IN / OUT socket, which allows the control of multiple amplifiers if necessary.

Catalog number	SR 4.500
Brand	Audison
Links	Official web presentation (English)
Number of amplifier channelsAmplifiers are divided into: - Monoblocks - 2-channel - 3-channel - 4-channel - 5-channel - 6-channel - multi-channel Each channel is used to power one speaker for the coaxial type, or one side if they are component speakers. Monoblock type amplifiers are mainly used for subwoofers. 2-channel are suitable for both subwoofers and, for example, the front pair of speakers in a car. 3-channel is used for front or rear speakers + subwoofer. 4-channel are used for front + rear speakers or 1 pair of speakers + subwoofer. 6 or 5-channel are used for 2 pairs of speakers + subwoofer, most often. Bridging means connecting the amplifier to a bridge, using the + pole from one channel and the - pole from the other channel. In most cases this is shown as "BRIDGED" on the amplifier.	4
Energy class of the amplifierAmplifiers are divided into two basic classes: analog and digital . Analog amplifiers (A/B) have higher consumption requirements, but usually have a more natural sound. Digital amplifiers (D) have significantly lower consumption and higher efficiency, but the sound may not be as faithful as with classic analog amplifiers.	ADT
RMS power into 4 ΩRMS power when loading speakers or subwoofer at 4 Ω. RMS power is the constant power of the amplifier and is one of the most important parameters when choosing an amplifier.	4 x 130 / 2 x 480 W
RMS power into 2 ΩRMS power when loading speakers or subwoofer at 2 Ω. RMS power is the constant power of the amplifier and is one of the most important parameters when choosing an amplifier.	4 x 220 W
Low-pass filter (LPF)LPF / LP or "low pass filter" offers the possibility to adjust the amplifier using a potentiometer so that the lower band plays only the frequencies in a certain band that you need. This filter is used to adjust the frequency range for the subwoofer, so that it does not overload or distort the sound. Example: Amplifiers most often have an LPF from 20 to 300 Hz. We recommend setting this potentiometer in the range of 45-80 Hz.	50 - 3.200 Hz
High pass filter (HPF)HPF / HP or The "hi pass filter" offers the option of setting the amplifier using a potentiometer so that medium, possibly mid-bass and treble frequencies play upwards from a certain frequency. Example: Amplifiers most often have an HPF from 40 to 300 Hz. If we set the potentiometer to a value of approx. 150 Hz, the sound will be clipped so that it plays frequencies from 150 Hz up to the maximum upper limit of the entire frequency range of the amplifier, perhaps up to 20,000 Hz. We recommend setting this potentiometer in the range of 80-160 Hz. Thanks to this setting option, the speakers can handle a higher performance, as you will not overload them with bass in the lower frequency range.	50 - 3.200 Hz
Harmonic Distortion (THD)Total harmonic distortion indicates how much the input signal is distorted in the amplifier. Distortions appear as overtones contained in the output signal. The proportion of originally absent parts of the signal is given as a percentage, typical values are between 0.001% and 0.5%. Distortion is measured in their power band. If it exceeds the limit of 0.7% from a certain power, it is the value of the output power of the given amplifier, from which it no longer plays without distortion and from which the distortion usually increases steeply, so that no further increase in power can be counted on. The lower the value, the better.	0,08 %
Signal-to-noise ratioThe signal-to-noise ratio means that the output signal always contains noise. The signal-to-noise ratio expresses how much of this noise is compared to the useful signal. The so-called A value is given, which does not take deep and very high frequencies into account. This corresponds to the characteristic of human hearing, which is not so sensitive to deep frequencies, especially below 1 kHz. The higher the value, the better the amplifier is.	105 dBA
Input sensitivityIn order for the amplifier to perform its function correctly, it requires an input signal of a certain level, which is different for car radios. It is measured in "Volts" (e.g. 2 V, 4 V, etc.) The higher the value at the output of the pre-amplifier, or car radio, the less demands are placed on the power of the amplifier. However, the amplifier must allow this input sensitivity, and for that reason this value is also given for the amplifier.	0,2 - 5 V
Bass boostBass boost or bass enhancement. With this function, the bass itself can be emphasized, at a high level of bass boost, the speakers and the subwoofer can distort a lot and the sound will be worse than better. We therefore recommend using the "bass boost" function wisely. With maximum use of bass boost, there is a risk of damage to the speakers and thus to the subwoofer.	Ano
On-board voltage rangeThe ability of the amplifier to operate at a specified voltage. As the voltage decreases, so does the power of the amplifier. The ideal voltage in a car is between 13.8 and 14.4 V.	11 - 15 V
High level inputsThe high-level input on the amplifier allows connection directly to the existing speakers in the car without additional purchase of an external high/low adapter. Important equipment in the case of installing an amplifier on an original car radio.	Ano
Automatic on and offThis function allows you to automatically switch on the amplifier.	Ano
Socket input terminalsFerrule terminals allow better wiring contact to the amplifier. It is also a more secure form of terminals. If you are tightening the sleeve terminals, we recommend retightening them after 1 day, as the connected cable gradually compresses.	Ano
Remote control included in the packageSome models of amplifiers also come with wired remote controls in the package, which on one side plug into the amplifier and on the other side you have a potentiometer that you can place anywhere in the cabin. A common place to place the remote control is under the steering wheel. The advantage is the regulation of power, and therefore volume, depending on driving conditions and the mood of the crew in the car.	Ne
Input for wired remote controlIf the amplifier has a remote control input.	Ne
The value of the fuses on the amplifierFrom the value of the fuses on the amplifier, you can get a true picture of the real performance of the amplifier.	2 x 25 A
Dimensions of the amplifier	264 x 155 x 47,5 mm
Mass	4,67 kg