NAD did an excellent job with this headphone amplifier
596685
You can hear the difference straightaway. NAD did an excellent job with this headphone amplifier.
29200
Surprisingly high quality sound from this small amplifier. Works great with my Audio-Technica headphones. The design is unusual, but it does the job well and at a reasonable price. It has rejuvenated an older iPod Nano.
855060
Works very well. Connected immediatly, volume control can be regulated via the amp, the remote or iTunes. Very impressed. Sound is very detailed and full. Obviously depends on the speakers you use. Be careful: it is deeper than many amps I have owned before, so you may want to check your Hifi rack dimensions. Big plus: it has a real on/of switch, so it is not always wasting energy in stand by mode.
I am not using the 5.1 suround mode, so I cant comment on that. I use normal 3 way speakers.
2016830
I use this amplifier paired with WCC650C component speakers and WCC690 6x9's.  The output for the high range speakers is CLEAN and plenty of power available at 4 ohms.  The sub channel does not have lots of power on paper, but it does produce enough bass through a 12" Kicker Comp VR to hurt your ears!  I generally keep the sub turned way down as I am more of a sound quality person that likes loud music.  However, a hard hitting deep bass track on a rap song will make the rear view mirror useless.  The amp performs beautifully across my eclectic music catalog, everything from rock to rap to country sounds pure and reproduces as well as any other amplifiers I've owned.  Everyone who has heard the sound system so far has been very impressed!
3691706
I bought this amplifier after a very favorable review in the Nov, 06 issue of The Absolute Sound, and I'm really glad that I did. The dynamics of the sound remind me of Sonic Impact (another class D amplifier) but without the distortion, particularly in the upper frequencies. This amplifier sounds relatively warm, quite listenable and produces music effortlessly and cleanly. The silver chassis looks amazing; too bad the golden color is not available in the US, or the more powerful 9755 model. I highly recommend this amplifier.
4458449
This is just an astounding headphone amplifier for the price.

Let me say the negatives upfront:
  HOT! After 10 minutes the heatsinks become too hot to touch.
  There is occasionally some interference due to the unfiltered power supply.
  Output power is quite high, this amp does not work with dinky earbuds, but in-ear monitors from Denon seemed fine.

PROS:

WOW SOUND. I use this with my Sennheiser 598s and I simply cannot overstate the beautiful colorized sound this tube amp produces.
798716
Full disclosure, I actually returned this product and bought the Icon HDP instead.  These are excellent DACs and headphone amps.  If you're looking for the best sound quality (at a reasonable price) you won't have to look any further.

I regularly use my Icon HDP with Sennheiser HD 650 headphones, which are a great match for the Nuforce.  I also use the Nuforce to drive a pair of powered studio monitors.  The sound is incredibly detailed, the bass is punchy, and I really enjoy listening to music with it.
3035172
Wow this product really made a tremendous difference making and elevating the sound of my headphones to an incredible level..
3894222
This is a nice, well-built, compact amplifier that easily switches from supporting my turntable, cd player and tape deck. Over the past 20 years, I've owned three or four larger Sony amps - most of which contained features that I never felt were useful (or were simply too technical for me to wrap my head around). This, on the other hand, is a great, general purpose amplifier - no large user manual or extraneous connection options to deal with. I was literally able to unbox and set it up in less than five minutes and have been using it for 8 months. Very pleased with it's performance. Highly recommended.
336628
Great headphone amp the bass boost is perfect with my Fidelio x2s and e17 dac with ths treble on the dac set to -2 and the bass either on +2 or +4 (this is a perfect setting for my setup).
2679329
I would highly recommend this product to anyone who wants to feed the output from a CD player directly to a power amp, providing the shortest and cleanest signal path.  Most modern CD players can be directly connected to a power amp, but lack a built-in volume control.  This is where this product comes in.  Not only does it have a volume control, but up to four CD players or comparable components can be connected to it, with the HAP-100 allowing you to switch between them.  Finally, as a bonus, it also contains a top quality headphone amplifier.  Although not inexpensive, it fulfills it design purpose extremely well.  The sound quality of signals fed through it is exemplary.
3051308
I am very pleased with this product! My stereo has never sounded so good. It was good before, very good, but I knew it could sound even better. I was skeptical that I would even be able to tell the difference once I got this DAC installed. The answer is yes. The sound is more detailed and warm. What I had before was very crisp and clean but somehow lacking. I thought it sounded a bit harsh and metallic; it's hard to describe. Now, using this DAC I am very happy with the sound that is reaching my celebrating ears!

I connected it between my blu-ray player and the DAC using a 75 ohm coaxial cable. Then I connected the output of the DAC to the pre-amp using a high quality RCA cable. I didn't want for my cables to be a weak link after all. The result is well worth the expense. Ultimately, for less than $500 my system sounds like it cost a couple of thousand more; in my audiophile opinion.
1313604
This is an amazing amplifier for the money.  We bought it for our daughter's recent wedding because the ceremony was being held on a mountaintop and we needed a battery-powered amp for the music and for the officiant and the couple when they said their vows (especially because the wind got pretty strong during the ceremony!).  The sound was really good!  The wireless microphone was not particularly good, making a buzzing sound, so my husband used a wired microphone with it instead.  The battery easily lasted 2 hours.  We are very happy with this purchase and can recommend it.
3538948
At 1/4 the volume it pumps out plenty of clear and powerful sound.  It also has two modes (one OR the other), you can amplify from a source (like a bluetooth receiver) or you can plug it into a laptop computer and it acts like a sound card.  I love this headphone amp!
3116189
The E18 is probably the best portable headphone amplifier you can own! It comes with two pads to prevent sliding when strapped to device, two sets of rubber bands to strap on your device two small and two large, two sets of micro USB jumper, USB to microUSB, 3.5mm jumper and a sweet pouch to keep the amplifier safe. The base boost is truly powerful making the headphones deliver serious bass to the music and the gain works really great as well. The only problem I have is you have to turn off then turn on the device in between switching modes. From PC and Phone or else it won't work. Which isn't a really big deal to me.
916303
I had purchased the FiiO E7 earlier, but I wanted to get more power for my new set of headphones. I am currently driving a pair of Grado SR325is.

The amp has no trouble driving these headphones with the E7 as a DAC. I never have to turn the dial to more than one third of the max setting.

One thing I like best about this amp is the build quality. The volume/power dial is fantastic and a real pleasure to turn up and down. The headphone jacks are solid and all connections are tight.

I really recommend this product for someone looking for an affordable and well performing desktop amp.
296318
I have a 35 year old pair of Cerwin-Vega AT-12 floor speakers that I have restored (new cones and surrounds on the woofer and mid-range).
This little amplifier powers those CV's so cleanly it is ridiculous!  The room is about 14x15 feet and half volume is producing 105 dB on the Mastech sound meter I have.  Granted it was not a test that followed the usual 'rules' for measuring sound pressure levels, but this amp performed!  The test was with Saint-Saens 3rd symphony, final movement, Auckland New Zealand.  The organ there has 64' pipes, and this amp (along with the re-built Cerwin-Vega's) did a marvelous job of recreating the sound and the feeling.  When your chest starts to vibrate on those low pipe organ notes, the volume is high enough, but kick it up a notch anyway.
I would give it 6 stars if it were available.
Bob - Florida,  Retired Systems Maintenance Engineer, Cape Canaveral, Florida