For this next set of measurements I’ll be looking at another amplifier designed by Uffe at Slowdiyer. There’s no particular reason that I chose another of these designs straight after looking at his recent offering beyond the fact that it’s conveniently available on the rack next to my computer. In addition, it gives me a…
Category: DIY Audio
Measuring the SlowMoy OPA1656
Following on from my last post, looking at integrating my existing equipment presented a small headache. I already have a headphones dummy load which, whilst not providing the exact impedance of my current headphones, does the job. The problem is that the outputs from the dummy load are BNC sockets, as it was originally designed…
Further (mis)adventures in measuring audio equipment
The most visited page on this site has always been the guide to distortion measurements, written when I had just discovered the thread on DIYAudio. That post, like many of my other posts here, was written more as a reference for me and this one fulfils much the same function. If it’s of use to…
A modern take on the CMoy Headphone Amplifier
Anybody who has browsed these pages in the past knows that I keep an eye on certain people’s projects, one of those being Uffe at Slowdiyer. Recently he has been experimenting with USB-C power supplies, one of the offshoots from this being an updated version of the’mini-pre‘, a variant of the classic Chu Moy headphone…
SlowSwitcher – DAC to amplifiers switch box
A convoluted setup in one of my rooms needed a little more confusion adding to it. As mentioned in my last post, I have a couple of sources – a PC and my streamer, which connect to a preamplifier, two amplifiers, two DACs and a headphones amp. I know I could streamline this, but I…
Amplifier switch box
A very simple project this time and actually one that addresses a problem I needed a solution for, rather than yet another headphone amplifier…although those are in the pipeline! In one of my rooms I have a range of (mostly) DIY audio equipment. Connected by USB to my desktop PC I have a Topping D30…
Simple and cheap streaming setup
I noticed the other day that I hadn’t posted anything on this site for nine months! There are a few reasons for this; following my contraction of Covid-19, I found it difficult to muster enthusiasm for hobbies, something that is only now just beginning to come back. A more pressing obstacle over the last few…
PeeCeeBee Preamplifier
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…
Let’s have some (en)closure on this.
I don’t get too many comments or questions on this blog, but what I do get are usually positive and encouraging. Occasionally there are technical questions, many of which are beyond my knowledge, I’m just a builder of other peoples designs, so I’ll usually direct those to the relevant places for more help. I have…
Custom labelling for enclosures on the cheap
Many of the enclosures I’ve used for my builds have plain brushed or anodized aluminium fronts. With these, all customization, drilling, labelling etc. is left to the builder. I’m actually quite fond of this plain, minimal look but occasionally some lettering would be helpful. This applies to the rear as well, I’m thinking RCA jacks…