Summary: The Audioengine D1 has great design and build quality, and the audio is really good. I'm using it with the USB connection (haven't tried the optical input yet), Windows 7 laptop, and Bose AE 2 headphones. Most of my music files are variable bit rate mp3 with a high of 328k to a low of 128k. The audio preformance has the warmth of a tube amp with the detail and clairty of a solidstate amp. I'm really like it, highly recommend.
Summary: I packed the D1 on my summer trip and have it hooked up to a Mac Air and Bose Soundlink Bluetooth speaker. It sounds great! I was able to easily compare it with a Bluetooth and 3.5mm cable hook-up and it's quite noticeable. There is ample bass and the midrange is clearer. If you care at all about sound quality, the D1 is a pretty inexpensive way to improve your tunes.
Pros: Good build and comes with the 3.5 mm audio cable.
Cons: Have grippy or suction style feet so unit can stay in place.
Summary: This is a good unit. Its small, it provides better amplification, and you'll clearly hear the difference in the dynamic range in volume and tone. This is particularly useful if you are using full size head phones of high quality.
Pros: small, versatile, good value, great improvement over in computer amplifier
Summary: I would recommend this to people who are considering portable DAC, including NuForce. I ordered the open box and it came in excellent condition. No scratch, no dent, no sign of use. However, the USB cable that it came with does not work. The computer cannot detect it and I could not hear any sound. So I read their troubleshooting section and switched the cable. It worked immediately! One thing I like the most about this DAC is its optical input.
Summary: This little thing is amazing. I use to always say it's crazy to spend $300.00 on a set of headphones to listen to music on your computer until I purchased the Audioengine. I for one love music,and I love how this item makes music sound great.I like jazz and old school and you can hear everything just the way its meant to sound,GREAT music just sounds great. I can listen to music all day now without disturbing others.
Pros: Its small,It sounds great.
Cons: Could use some more power; or maybe its me.I just like BIG POWER!!!
Summary: I have this hooked up to Audioengine 5+ speakers to my computer. the sound is awesome coming through these speakers. Installation was very easy..Im using Sony v6 headphones clean sound tight bass.