[chbot] https://hackaday.com/2025/10/28/analog-surround-sound-was-everywhere-but-you-probably-didnt-notice/

[Mark Atherton]

Ha !

The SDU4/SEU4 were never intended for sale. Wonder how they made it to 
eBay ??

-Mark

On 17/12/2025 12:32 am, Andy Gardner wrote:
> 
> Topical...
> 
> https://hackaday.com/2025/10/28/analog-surround-sound-was-everywhere- 
> but-you-probably-didnt-notice/
> 
> 
> 
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