Model A:
Smooth, clean and convincing


It takes some time to understand this simple fact about modern linear power amp chips design: the chip is not the limiting factor. It can be anything. The limit is design around it.

And with this design, Audial Model A represents here today’s state of the art.

It is tonally rich, and easy on ear. Precise and clean, and smooth. Dynamic and convincing. Three dimensional, with body and weight.

In a word, it is a highest performing amplifier, and it is offered at very affordable price.

● Linear IC based stereo amplifier

● Low impedance shunt potentiometer, as ultimate volume control

● 15 cm total signal path length (input to output)

● Highest quality parts, selected for their actual sonic properties

● 25 W and 50 W optimized versions

● Machined and engraved aluminum chassis

● Optional features available


Premium parts

Model A can be shipped with premium parts. These include:

– pure copper input and output connectors

– uninsulated internal wiring

– cermet potentiometer


One or two inputs

For purists, one input has all the advantages, as it just skips any switch.

Still, toggle (a.k.a. kip) switch can be acceptable. It is limited to two inputs, however usually two inputs are actually enough. Also, to avoid any significant internal signal wiring, this switch is located at back plate, next to input connectors.

It was decided to avoid compromises associated to rotary switch, which is required for more than two inputs.


Volume control

A low impedance shunt potentiometer is normally installed, and this is the best sounding volume control for this (and probably any other) amp.

However, tube sources usually do not drive well such a load (as low as 750 Ohm). That is why the option with more conventional 25 – 50 kOhm input impedance is available.

In addition, Model A can be also shipped as power amplifier only, with no volume control at all, and in this case it has 47 kOhm input impedance. Such an option is suggested to users with, say, tube source and TVC preamp.



Model A is available as 25 W and 50 W version. These options are offered to let Model A do its best in actual environment.

The only real difference between 25 W and 50 W version is in supply voltage.

Please note that, when ordering, unless 50 W is specified, a 25 W version is assumed. In most cases it is (more than) enough in home use, and hence recommended option.

Please note that the change in power does not change the price.



RCA, one or two pairs, with or without volume control

1 V RMS is required for full power, typical

Several options are offered, with input impedances between 750 Ohm and 47 kOhm



25 W / 8 Ohm, 40 W / 4 Ohm

50 W / 8 Ohm version is also available



29 dB, typical


Frequency Response:

20 Hz – 100 kHz, +/- 0.5 dB, typical

The input is directly coupled, but amplifier is blocked for DC gain, for loudspeakers safety


Absolute Phase:



Harmonic Distortion (@ full power):

0.01% @ 1 kHz

0.04% across the audio band, worst case


Intermodulation Distortion (@ full power):



Mains voltage:

220-240VAC / 50-60Hz, IEC (C14) connector

110-120VAC / 50-60Hz also available


Dimensions (W x D x H):

352 x 255 x 75 mm


Net Weight:

Approx. 6 kg


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