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…
Public Domain Audio Project PCBs
This page is a repository for build files which are considered public domain. It is hoped that by distributing these files widely, they remain visible to DIY enthusiasts looking for free projects that do not infringe on the copyright or intellectual property of the designer. You can download these projects, modify them as you wish…
An open source LM3886 chip amplifier.
I decided to build an amplifier for a friend. There are a number of good chips for amplifiers and I managed to purchase a pair of LM3886 opamps new for £5 from a seller on DIYAudio a few months ago. With the chip decided upon, a suitable layout was sought. As much as I would…
Grounding resources
It seems that grounding and safety earth is one of the most confusing aspects of this hobby for beginners like me.Here are some resources that I have found useful. I will add more as I come across them. https://hifisonix.com/ground-loops/ http://sound-au.com/earthing.htm https://www.diyaudio.com/forums/solid-state/324413-dozens-schemes-wire-amp.html
Elliott Sound Projects P97 Pre-amplifier
Following the completion of the PeeCeeBee power amplifier, I wanted to build a pre-amplifier to go with it. At present I’m using a Schiit Modi 2 & Magni 3 combo for DAC and preamp duties, and whilst these are perfectly adequate, I wanted a preamp to match the style of the PeeCeeBee. In contrast with…
Do digital players have their own sound? An internet blind test
Following a poll on the Steve Hoffman hardware forum which concluded that CD players have their own signature, Archimago, a respected audio blogger, has developed a blind test to see whether listeners can hear a difference between different types of digital players. The original poll asked for subjective opinions, with the majority (>89%) of respondents…
PeeCeeBee V4 Class AB amplifier
This latest build is the PeeCeeBee, a discrete Class AB amplifier, now in its fourth iteration. It was designed and made available by Shaan through a group buy over at DIYAudio. He has recently designed a very nice PSU as well and so I ordered a couple, one of which powers this amp. Although Shaan…
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…
Quick speaker build project
I’ve been thinking of building some speakers for a while now, and with the imminent departure of Idiot Child No.2 to university, an excuse has arisen – that being a simple audio set-up for her room. The project had to be relatively cheap as I don’t have much spare cash for the next few months….