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(mis) Adventures in Hi-Fi

Tag: amplifier

Measuring the Slowdiyer Composite Headphone Amplifier

Posted on 5 November 20215 November 2021

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…

SlowSwitcher – DAC to amplifiers switch box

Posted on 26 September 202126 September 2021

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

Posted on 3 September 20214 September 2021

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

Posted on 29 August 202129 August 2021

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…

ICEpower 50ASX2(SE) based Integrated Amplifier

Posted on 16 February 202016 February 2020

I bought an ICEpower 50ASX2 amplifier from Ebay in 2018. It was an impulse buy if I’m honest as it was very cheap, they retail at about £100 in the UK and I got it for £35, but it’s been sat in my drawer since then waiting for a purpose. I must admit, I’m running…

A DIY approach to distortion measurements for audio amplifiers

Posted on 1 September 201911 November 2021

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,…

Rod Elliott ESP P88 Pre-amplifier

Posted on 18 June 20197 February 2020

I’ve been impressed by the ESP projects by Rod Elliott, they work well, are simple for novices but with plenty of scope for modifications. The projects come with extensive documentation, including construction advice if you buy the PCBs. I decided to try his well regarded Project 88 preamplifier to go with my Nelson Pass ACA….

Chipamp.com LM3886 PCB

Posted on 28 May 20191 November 2020

This is the original chipamp.com board for the LM3886 amplifier, generously released into the public domain by its designer Brian Bell. The board size is 30x74mm so comes in really cheap when ordering. Although the schematic is provided below, it is also worth having a look at the datasheet for more information. Click here to…

Ray Samuels Audio XP-7 Headphone Amplifier clone

Posted on 4 May 20194 April 2020

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…

LM3886 Amplifier Build Files by 00940

Posted on 1 May 201913 December 2020

A thread on DIYAudio was concerned with creating an open source PCB layout for the LM3886 amplifier. Although initiated and largely designed by user 00940, there has been some input from others, including advice from Tom Christiansen of Neurochrome, resulting in this implementation. Gerber files, the set of files necessary for a PCB lab to…

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