As previewed in an earlier post, this is a preamplifier designed by Shaan and offered for sale in a group buy at DIY Audio. It is fully discrete, Class A with an integrated power supply. The twist is that it offers adjustable (from less than 0.001% to over 1%) single-ended, predominantly second harmonic distortion. In…
Tag: distortion
PeeCeeBee Preamplifier Preview
An envelope dropped through the letterbox yesterday morning containing a PCB I’m quite excited about, a preamplifier with a twist. In a similar vein to the Pass H2 harmonic generator, this preamplifier has a real-time, adjustable harmonic distortion level. The circuit was designed by Shaan and is offered for sale in a group buy on…
A quick note on distortion
Recently I built the Nelson Pass H2 Harmonic Generator, a circuit that injects some 2nd harmonic distortion into the signal chain. Whilst I still need to get this boxed up to play with it properly, I’ve been mooching around and doing some reading on distortion. As part of my meandering, I came across this website…
Nelson Pass H2 Harmonic Generator
In a nice turn of events, my anniversary of 2 years as a member of the DIYAudio.com forum was coincidentally marked with a nice little gift. Nelson Pass and the good people at DIYAudio host an event called Burning Amp annually. It allows people to see and hear designs made by other DIY audio enthusiasts…
Akitika 1kHz Oscillator
In a previous post I detailed the setup I’ve begun to use to learn about measuring the distortion of some of my amplifiers. Acknowledging this setup is rudimentary, for those wishing to tinker further there are of course many options. As ever, improvements can be made by the utilisation of better (read more expensive) equipment…
A DIY approach to distortion measurements for audio amplifiers
I imagine I am typical of many DIY audio enthusiasts in that I build something and hope that subjectively it sounds good. However, I am also curious about the objective measurements of the equipment. I thought this level of analysis would be beyond my ability and budget, but an interesting thread appeared on DIYAudio.com recently,…