ctrl-alt-rees | Acorn Archimedes A305 Restoration: Audio Fix! Filter Mod & Burr-Brown Op Amp Upgrade @ctrlaltrees | Uploaded September 2020 | Updated October 2024, 31 minutes ago.
Ever wanted to fix that dull, flat, muted audio on your Acorn Archimedes? In this HOWTO I'll show you how to upgrade your Archie's audio by fitting a higher spec op amp and removing some unneccessary filtering components for the best possible output.

Relevant Links:
Previous Archimedes Restoration Update: youtu.be/xk0z6wG_xzs
Zarchos YouTube Channel: youtube.com/user/Archimedes75009
Simple DIY method to get unfiltered high quality sound on your Archimedes: stardot.org.uk/forums/viewtopic.php?f=16&t=13630&sid=c2e7083471210bd4ad4bf27c18fdb4c5
Better sound for the Archimedes with OPA4134PA Burr Brown OA: stardot.org.uk/forums/viewtopic.php?t=11287
Steve Harrison's Website (inc QTM tracker): pi-star.co.uk

Socials:
Twitter: twitter.com/ctrl_alt_rees
Instagram: instagram.com/ctrl.alt.rees
Patreon: patreon.com/ctrlaltrees
Ko-Fi: ko-fi.com/ctrlaltrees

Chapters:
00:00 Intro
00:29 History Of The Archimedes
02:02 Teardown
03:24 Motherboard Exploration
04:38 Op Amp Upgrade HOWTO
05:33 Filtering Explanation & Mod Background
06:28 Filter Mod HOWTO
10:00 Reassembly
11:48 Before & After Comparison: Cannon Fodder
14:23 Before & After Comparison: Magic Pockets
15:38 Conclusions & Outro

Music Credit:
Royalty-Free Music From Epidemic Sound: epidemicsound.com