I’m a fan of the projects on Rod Elliott’s ESP site as they come with lots of information to help you understand the circuit, and most are simple and robust enough for entry-level DIY hobbyists. Yet this does not mean these are low audio quality circuits, Rod specifies this P113 headphone amplifier as a very…
Tag: Headphone amplifier
Another buffered opamp headphone amplifier
For no particular reason I built another headphone amp. This one is similar to the Emmeline XP-7 clone I built, in that it utilises op-amps with buffers. The complete setup comprises three components; the amplifier itself, a dual power supply, and a delay circuit, all of which are slowdiyer designs. The amplifier is relatively straightforward…
Headphone amplifier power outputs
Following on from my last post where I showed the headphones dummy load, I thought I would post the measurements I obtained from the other headphone amplifiers I have built. It’s also an excuse to play around with my new toys. I knew that eventually I would end up with an oscilloscope, I spent a…
Headphones Dummy Load
A dummy load simulates your headphones by presenting the amplifier with an impedance as close to that of your headphones as possible, using high wattage resistors. There are a number of reasons you may wish to use this – but primarily you are able to protect your headphones and your hearing. You can use higher…
RJM Audio Sapphire 4 Headphone Amplifier
I came across this headphone amplifier project about a year ago on DIYaudio.com. Built using the default choices, the class A output buffer provides 30 mW minimum output power into all headphone loads between 30 and 600 ohms. One of the things that impressed me was the continual input the designer Richard Murdey had on…
A resolved problem with Audioquest Dragonfly
After I wrote and published a post regarding my experience with Superfi and Audioquest, I sent an email to Audioquest Managing Director Richard Brans expressing my frustration at my perceived lack of warranty support. I felt like the buck had been passed to Superfi, who were non-responsive, and I was being ignored. In all honesty…
Ray Samuels Audio XP-7 Headphone Amplifier clone
I bought a mixed bag of boards recently and came across this one knowing nothing about it, apart from it appearing to be a headphone amp. I finally found out that it is a clone of a commercial project – the Emmeline XP-7 which has been around for a number of years. A cursory search…
Workspace listening setup
For this short post I thought I’d just show the setup I’m using for the spare bedroom now that both Idiot Children have left home. The room still has a bed but I’ve managed to have a desk for my electronics.
CMoy Mark IV – preamplifier
Whilst many modern sources provide enough voltage to feed a reasonable signal to amplifiers, some, such as the Pass ACA, may benefit from a boost in gain, particularly if paired with inefficient speakers. As I had most of the parts, I thought I would try a variation of the CMoy headphone amplifier as a preamplifier…
CMoy headphone amplifier version 3
After building my Mark II CMoy headphone amplifier I decided to make a version which resembled more of a desktop model.