Good quality....not great

Puts out decent quality sound for a reasonable price

Very inexpensive and high quality sound.

The lack of a true equalizer on that iPod may be the biggest roadblock to good quality audio

I realize that the quality of the sound is limited by the signal from the phone, but I still enjoy the bigger sound from this little amp

VALVO E180F\6688\6J9P. Aside from a little better sound quality IMHO, the VALVO tubes have eliminated the ringing effect that I experienced while using the Beijing

Good Quality

Highly recommended for a great headphone experience, very accurate and balanced sound quality (I am definitely an audiophile)

Great tonal quality.

Great quality for the price

This is an amazing quality amp for the price

Although improved the sound quality, I tube roll'd the Beijing 6J9 to a matched pair

Amazing sound quality and comfortable listening volume is at about half for me

This little amp has good quality sound and is pretty loud

I know it's priced low, but I was still expecting better sound quality.

Great quality from this amp

Good quality and small form factor, fits in the palm of your hand

That said, the quality is very very good and it looks cool sitting on my desk.

amazing sound quality improvement.

amazing sound quality improvement.

Goal was to have better quality audio with more bass at a lower volume

I am currently running 6688s, much better quality and sound.

so I expect superior sound quality

Good quality and sound for the money

I think it adds a really nice quality to the sound.

fast ship...nice high quality package.. it is not really an integrated amp...a tube buffer unity gain to add the tube coloration to a couple op-amps..sounds fine

The sound quality definitely improved over my onboard sound and the possible volume was WAY higher

How good is the sound quality?

The quality of sound and volume improvement for the price will be hard to beat.

I have been rather interested in trying this amp out with with Soviet era vacuum tubes and I was shocked as to how good they make this amp

n’t go wrong on any of it