Sanity Clause was good to me and I found a 60 GB X5 under the tree. My question is to what level of Flac compression does it support? Specifications say levels 0,1 and 2. I played some files compressed at level 5 and they sounded fine. Older threads have said firmware updates support all...

Gee, I didn't think anyone cared. Just when you thought it was safe, a new headphone amp project in the June AudioXpress by Aren van Waarde. Same van Waarde whose tube amp design is on Headwize. Its a SE Class A solid state amp. Very simple design, with a cap multiplier regulated power...

I'm trying to mount a 3.5 mm jack on to a thick plastic case. The normal panel mount jacks don't have enough neck length for the mounting nut to be fully threaded on to it. This leads to an intermittant or shorted signal with the jack. I've had more difficulty with the Switchcraft jacks than...

Checkout the headphone amp project by Klaus Noll in the May AudioXpress pp 52-56. It uses AD744/AD811 opamps and a Didden/Jung power supply.

Since all the "good" 5751s are gone or priced astronomically high, I decided to roll some current production tubes, and maybe sift through everyone else's NOS trash. So to have a baseline for some of my testing, I measured the frequency response of the amp with the stock tubes: JJ ECC83 with...

When Apheared posted his AD-823 / EL-2001 amp I was really excited. I thought that this would be a portable amp that could compete with the likes of OBH-11/SEs and MG-Heads. Man was I disappointed. The "CMoy Killer" amp sounded really "rough" to me. I thought maybe it was a circuit topology...