innerfidelity.com
ECP Audio L-2 Headphone Amplifier | InnerFidelity
http://www.innerfidelity.com/content/ecp-audio-l-2-headphone-amplifier
Rocky Mountain Audio Fest. Vacuum Tube Home Headphone Amplifier Reviews. ECP Audio L-2 Headphone Amplifier. 149; Posted: Mar 19, 2012. The ECP Audio L-2 Headphone Amplifier ($2495). I met owner/designer Doug Savitsky (the man behind ECP Audio. Long ago through the DIY Audio forum at Head-Fi. We shared a common love of building things and were both passionately involved in the headphone DIY community. It was at CanJam 2010. A fully differential (balanced) solid-state design, and the L-2. I've had the good...
headphonehub.blogspot.com
The PC Tech, Gadget, and Headphone Hub: Pitfalls of Vacuum Tube Amplifiers
http://headphonehub.blogspot.com/2013/03/pitfalls-of-vacuum-tube-amplifiers.html
The PC Tech, Gadget, and Headphone Hub. A place for all things related to technology and audio. Tuesday, March 12, 2013. Pitfalls of Vacuum Tube Amplifiers. Schiit Audio Valhalla Tubes. Below I have linked several companies that make quality tube amplifiers. Some of them even sell the individual vacuum tubes as well! CLICK HERE for Schiit Audio. CLICK HERE for Woo Audio. CLICK HERE for Eddie Current Audio. CLICK HERE for ECP Audio. CLICK HERE for Cary Audio. CLICK HERE for Icon Audio. What are the pluses...
diy.ecpaudio.com
ecp audio diy: Black Diamond Headphone Amplifier, Part 2
http://diy.ecpaudio.com/2013/02/black-diamond-headphone-amplifier-part-2.html
Thursday, February 14, 2013. Black Diamond Headphone Amplifier, Part 2. Of this article, I detailed the theoretical background to the design. This part will detail the practical build process of the circuit as well as the enclosure. I found with the initial breadboard version that both Cinemag. Once this experiment was complete and I was sure the concept worked, I set about to designing a full PCB for an entire amplifier. For this, I chose to use the Lundahls both for space saving reasons (the Cinema...
diy.ecpaudio.com
ecp audio diy: Black Diamond Headphone Amplifier, Part 1
http://diy.ecpaudio.com/2012/11/black-diamond-headphone-amplifier-part-1.html
Thursday, November 8, 2012. Black Diamond Headphone Amplifier, Part 1. This brings us to the Black Diamond. The idea here was to use a buffer to drive a stepup transformer followed by an output transformer. The input buffer provides a high input impedance for the amplifier. It also provides a low source impedance for the transformer. The output buffer drives the headphones. And the transformer, of course, provides the gain. With an emitter or source follower, input impedance is reasonably high, output im...
diy.ecpaudio.com
ecp audio diy: Designing a Parafeed Headphone Amplifier
http://diy.ecpaudio.com/p/parafeed-tutorial.html
Designing a Parafeed Headphone Amplifier. Ow a tube works. A tube has 3 electrodes (hence triode, pentodes are for another day) – the anode, also called the plate, the cathode, and the grid, also called the control grid. When there is a positive voltage applied to the anode, current flows from the cathode to the anode (Why? Click here http:/ www.tpub.com/content/neets/14178/css/14178 13.htm. Figure 1: A Tube’s electrodes. Figure 2: Current flow. Figure 3: Input and output signals. Finally, if a load of s...
diy.ecpaudio.com
ecp audio diy: The Caged Frog II-- A Pentode Based Differential Transconductance Amplifier for Headphones
http://diy.ecpaudio.com/2011/12/the-caged-frog-ii-pentode-based.html
Friday, December 9, 2011. The Caged Frog II- A Pentode Based Differential Transconductance Amplifier for Headphones. I really like transconductance amps for driving headphones. The first one I built, the Caged Frog. Has remained a favorite of mine. Even the Baby Frog. Is great for what it is. But, since I have a definite preference these days for differential amps, the next obvious thing to do was make a differential gm amp. I scrounged up a small stash of 7W7 tubes, a Pete Millett. Anyhow, I also decide...
diy.ecpaudio.com
ecp audio diy: Apsara Amplifier
http://diy.ecpaudio.com/2014/06/apsara-amplifier.html
Thursday, June 5, 2014. All of these little stories seem to be the same – I tried to build some circuit, it went badly, and them some little change made it great. This one is no different. In this case, however, I had recently built something similar to what he wanted for the console project. After an amazing amount of frustration, I decided to just build something else. My most recent project had been the Black Diamond amplifier. I had picked up used at some point. And this led to super quiet awesome so...
