How do Aria WT100 Amplifiers Sound?

WT: The first thing that strikes you when you listen to the WT amps is three-dimensional imaging. The sound comes out of blackness, grain-free, with a real sense of space. You really do get a sense of the performers in the room with you. Singers are clearly in front of the band. Side-to-side imaging is precise, front-to-back layering is clear.
The second impression is one of transparency. The sound is consummately transparent and sweet without any edge or glare. Completely silent between notes -- everything is audible: the damper mechanism of the piano, the buzz of the bass player's strings on the neck of his instrument, the swish and sizzle of the drummer's brushes and cymbals. It's a detailed, unsmeared sound that remains liquid and open. From the bass up through the mids and highs, the sound is totally coherent.
While not forgiving, the amplifier is also not unforgiving, its presentation is always very, very musical
 
XL:

When you step up to the XL amplifiers, the sound becomes strikingly more real-sounding. This amplifier retains all the incredible virtues of the WT amp: the detail, the air and the imaging. But what this amplifier does that lesser amps cannot is present the sound with the full-bodied richness of live music. Ordinary electronic components seem to strip some of the weight and fullness from music. But not the XL amps, which give you a far more powerful presentation of the bass and midbass.
Instruments will be considerably fatter-sounding, vocalist's chest tones are more audible, voices are more buttery-smooth and full. Dynamics are frighteningly lifelike: when the piano player strikes a note, you hear not only the note, but the "thump" of the instrument's action; you can clearly hear the weight and size of large instruments, the "thud" of the bass player's fingers when he plucks the strings, while low drum tones resonate in your chest.
It's hard to describe what happens when a recording is played back with all the low bass power that you've never heard before, the low bass power that you know your expensive speakers should be capable of, the rich bass and midbass that tells you that you are in the presence of musicians. It's an amazingly involving experience, one so lifelike that it will continue to entrance you.