Highly recommend for people that do not want to spend a fortune on a higher-priced preamp because this can be used as a preamp as well as a headphone

Great headphone amps can run into a lot of money if you care to chase that dragon

It's a little tank that can make good headphones sing like angels

This headphone reveals flaws in sources, source material and amplification

I let each of my three sons who do a lot of gaming and listening to music use my dark voice and headphones and they were blown away of the sounds they heard in there shoot up war

My headphones are easy to drive, but I'm barely at 9:00 o'clock on the dial

I was looking for a decent headphone amp for the house that wasn't going to break the bank.

I’m using the sennheiser hd600; a wonderful headphone but not a crazy big soundstage but accurate and sensitive

The darkvoice doesn’t fix what’s wrong about the pro4aa, not that these are terrible headphones, just not on the same level as the Sennheiser or even the Sony MDR-V6 (one of my personal favorites) but the darkvoice does add something