Product: AM Audio PA-100 integrated amp
Manufacturer: AM Audio - Corso Milano 102, 27029 Vigevano (PV) - Tel. +39 381 347161 - Fax +39 381 346469
Approx. price: Lit. 2,300 US $ / 2,000 Euro
Attilio Conti's aim, who is the AM AUDIO owner, is to build Hi-Fi very high quality and performance.
Nothing has been disregarded: electronic, mechanical components and layout, everything shows the quality of the project. In this way, he who buys an AM AUDIO component is sure to find a no compromise object which comes with a five years warranty.
Attilio Conti does not have distributors in Italy, but he sells directly to the customers. Their ads claim AM Audio makes "Components for audiophiles", and we are going to verify if what they say is true.
It has four handles which are very useful considering its heavy weight, 26 Kg (that's 55 lbs, dudes!), and without them it is almost impossible to MOVE the amplifier.
Anyway its appearance evidently shows its quality level.
The location of the IEC socket for the main power is pretty unusual: it is on the lower part of the amplifier, directly under the massive 500 VA (!!!) toroidal transformer, so to avoid to run the mains cables "inside" the cabinet. Neat.
The data claim a 2x100W @8ohm and a 2x220W @2ohm output power with a 50 A (!!!) current peak.
Another peculiarity of this amplifier is that it works in class A up to 2x5 Watts @8ohm.
The main IEC socket, because of its unusual location, is pretty unpractical to use After the listening test, I understood why this unusual solution has to be preferred.
The energy related to the frequency appears to be constant, with a bass range that's well extended, powerful and articulated, aided by a clean and neat mid-bass.
The 3D image is very good with respect to depth and height, just good with respect to its width. The contours of the instruments fail to appear very precise though they do have BODY and MASS...
With respect to the dynamic performance it sounds naturally energic without being explosive or intimidating. The sense of pace is good and it contributes to that "natural" feeling described above.
Since now, I've been listening to the PA-100 with the volume control at nine o'clock. OK, this means nothing, after all, but I want to test how this amp reacts at very high listening levels. After all, it is a monster which weighs 55 lbs!!!
Well, the more you ask, the louder it sounds: powerful, controlled and with the same tonal balance. I reach the physical limits of my listening room without being able to "stress" this amp...
This is one of the "atouts" of this amp: it can sound gentle and refined either at low and very high listening levels. Do you have hard-to-drive low-efficieny loudspeakers? Hook up a PA-100...and smile!
With respect to the power supply, I noticed that the PA-100 seems to not care a lot of the electric phase and of the different mains cables used.
Using our cable TNT-TTS, the sound did not changed so much as it happened testing other amplifiers.
I think the reason is that AM-AUDIO designers took properly in account these problems. They carefully designed the power supply section and decided to protect the power transformer with an armoured shielding cover. They placed the IEC socket close to the transformer (an unpractical but good sounding solution). They also used a passive line stage.
Many times I've noticed that the active line stage takes advantage of using a high quality mains cable more than the passive line stage.
Considering how the PA-100 sounds I suggest you to use very analytic loudspeakers. This kind of loudspeakers coupled with low quality amplifiers normally sound pretty bad.
I'm not telling you that the PA-100 does not sound good with cheap partners. I just think that it is clever to use high quality stuff.
I would like to sincerely thank Attilio Conti, AM-AUDIO owner, for having sent us this amp for this listening test.
© Copyright 1999 Stefano Monteferri - https://www.tnt-audio.com
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