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Audison AV 5.1k Review. Is Flagship Worth the Money?

We all want to have installed the best amplifier in our cars, but top-class like the Audison Voce AV 5.1K, are quite expensive.

Is this Audison 5-channel amplifier worth the price of over $1,600? Let’s find out.

The Audison AV 5.1k is the top model among the five-channel amplifiers on the market and is definitely worth its price. Like all other Audison products, this large amplifier, which barely fits in the smaller trunks, was designed and built with the utmost attention to detail. More importantly, it produces incredibly precise sounds from all five channels.

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I had the pleasure of listening to the music it produced, so let’s take a closer look at Audison Voce AV5.1K in the article below. (link to Amazon opens in the new window)

Is Audison a Good Brand?

Over the years of producing the highest quality car audio equipment, Audison has gained the reputation of the Hi-End brand, which designs and builds high-quality car amplifiers using the best-known technologies.

Thanks to the quality and advanced engineering shown in all products, Audison has received many prestigious awards that confirm the highest class of this brand. Although Audison products are expensive, their high quality and excellent performance quickly offset the higher price you have to pay.

Audison Voce 5.1k review

In the case of Voce AV5.1K, it is no different. Its quality and reliability are exceptional, and even when I compare it with other high-class amplifiers that I had a chance to listen to, they are not as good as AV5.1K.

Audison AV 5.1k Features

I have heard many opinions with which I fully agree, that Audison Voce AV 5.1k is more than an amplifier. And it is true because these are actually two amplifiers built-in together:

  • A/B class 4 channel for the speakers,

Thanks to the use of two interchangeable modules allowing for either analog or digital connection, you can adapt its functionality to your system’s individual needs. You will not find this feature in other brands.

The digital connection enables the full use of a system that consists of a top-class head unit, sound processor, and amplifier, without signal distortion and energy loss.

Thanks to AV (Authentic Voice) technology that comes from the previous Thesis series amplifiers, Voce AV 5.1k provides sound quality that is unattainable for most car amplifiers.

If you compare this amplifier to the car models, I dare to say without a shadow of a doubt that this is a Bugatti.

The five-channel Audison is distinguished not only by interchangeable modules but also by unusual power distribution, thanks to which it can be used to power a complete car audio system. To ensure the best sound quality, the front channels are designed to work only with 4-ohm loads, while the rear channels can drive either 2- or 4-ohm loads.

The table below shows the power distribution between the channels at different loads:

4 Ohm2 x 75W2 x 140W1 x 600W
4 / 2 Ohm2 x 75W2 x 140W1 x 1000W
2 / 4 Ohm2 x 75W2 x 250W1 x 1000W

Although in our car we had AV 5.1K powering speakers in all four doors and to the subwoofer, you can use all 5 channels to power a 2-way system and a subwoofer:

  • Channels A – 4 Ohm tweeters
  • Channels B – Mid-range woofers, either 100 – 120W at 4 Ohm, or 200W at 2 Ohm
  • Channels C – 2 Ohm subwoofer

When looking at the amplifier, there is nothing unusual in its shape, well except for its beautiful design. On one side of the amp, there are inputs with available high-level and RCA connections. There is even a method of obtaining an RCA level output signal from high-level inputs by using a built-in high to low-level converter.

After opening the top cover, you see an interior packed with the highest quality components, including large transistors. Eight of them are just for C channels to power the subwoofer.

The four small channels A and B have two power transistors per channel, but they are different. Transistors for Channels B are 2 Ohm stable and more powerful than 4 Ohm for channels A.

The amplifier can be configured to turn on using a traditional 12 V trigger signal or using an audio signal. This is useful for cars that do not have a standard trigger output.

At the opposite end of the amplifier, you will find all power and speaker terminals made for wires gauge four and eight. With power AV 5.1K produces, you do not want to use any thinner wires. The second B + terminal is for connecting an external capacitor that is also needed.

When you want to control the Vive remotely, there is also a combination of optional VCRA subwoofer volume control and 12 V trigger input and output.

Audison Voce 5.1k inside

On the top of the amplifier, you see two removable acrylic panels. Under one is the main fuse, a 100A mini-ANL, and under the second panel, there are crossover controls that offer advanced settings.

There are two options to configure front channels, in either full range or high pass mode, with a frequency range from 50 Hz to 5 kHz. Rear channels have full range, high pass, or bandwidth settings.

The high-pass filter has a frequency range from 50 Hz to 1kHz, while the low-pass is adjustable from 250 Hz to 5 kHz. Front and rear switches use a slope of -12 dB per octave.

The subwoofer crossover you can set between 50Hz and 150Hz, and adjust up to -24 dB per octave. Adjusting the subwoofer channel to full range allows to power up tones up to 1.5 kHz.

Several other things set apart AV5.1K from other five-channel amplifiers:

  • Way the front channels are biased for maximum fidelity
  • The way the amplifier management processor (AMP) continually monitors the operating status of the amplifier and communicates this state to the user through four different colored LEDs

However, that what makes this amplifier notably different from other models is its ability to transform from a typical analog input amplifier to a fully digital input amplifier.

The benefits of using digital signal transmission between components in a car are considerable:

  • First of all, sending a stream of data bits eliminates the possibility of problems with radiated noise entering the signal cables, which is the main reason for many people to complain.
  • Secondly, the digital signal ensures an optimal signal-to-noise ratio and dynamic range in the audio signal. That difference can be easily heard by everyone that pays attention to the sound quality.

If you want to use the AV5.1K in digital mode only, remove the two screws, remove the analog input module, and replace it with the digital AV bit IN module. The change is straightforward and takes no more than a few minutes. AV bit IN module costs over $170 but is worth this price.

To power the fully digital AV bit IN module, you need a Bit Bit One or Bit Ten D processor. The configuration of channels is simple and takes only a few seconds to complete. The digital audio bus can carry signals for up to eight channels.

Audison AV 5.1k Listening Experience

First, we started listening to the amplifier in analog mode, and like any other Audison product I have ever heard, I am not disappointed. The amplifier sounds are perfect, with excellent details in the upper part and a fantastic stereo image. I have to add that I am not using any low-quality compressed music files, like mp3 or others. Amplifier received signal from a CD player

Regardless of the music type I listen to, I am delighted with the sound produced by the AV5.1K. The power level that comes to the subwoofer is excellent, and thanks to precisely set pass filters, I can hear what I want to hear without any unnecessary “boomy” sounds.

Because four channels in this amplifier work in class A/B, therefore it consumes a lot of energy, even at the low volume. When I measured amperage, I saw a stable consumption of 60A. Although Voce has a small ventilation area only on the bottom side, I did not notice heat coming out, which means Audison did an excellent job developing a cooling system.

This amplifier, however, consumes a lot of power. When I tested it without using the rear channels, I saw a stable consumption of 60A of current without going over a quarter of the volume.

Next, we switched to the digital mode. After changing the module to the AV bit IN, I was able to hear the real benefits and power of the AV 5.1K. The difference I noticed immediately, the same music but with much better depth and realism. Overall, listening to music was a pure pleasure.

When you have installed the AV bit IN module, you can switch between digital and analog input. Although I noticed a drop in dynamics after a switch to analog mode, the overall experience was still better than with the previously installed analog module.

Audison made a fantastic amplifier, which is definitely the way to go if you listen to music from a digital source. With such sound quality, a $170 for AV bit IN module seems like a Bargain Of The Century.

Audison Voce Final Comments

If you are serious about sound quality in your car and don’t mind spending extra money on a quality product that will undoubtedly provide many years of enjoyment, the Audison AV5.1K together with AV bit IN module should be added to your to-do list of equipment.

Total costs for an amplifier and digital module will be over $1800, but If I had spare money and was about to purchase an amplifier today, Audison AV5.1K is the one I’d take.

I strongly suggest using top-quality pure copper OFC wires to maximize the performance and enjoyment of this amplifier. Also, Audison added the terminal for the external capacitor for a reason, so if you want to experience all advantages of this fantastic amplifier, you should seriously consider installing a 2F capacitor.