Vintage Simmons Drums (UK) Users Group

The headphone amp of the SDS9 is located unfortunately on the power-supply-board and not on the main pcb. Rumours say, that they didn't want to build a headphone amp into the unit at all because they never had headphone amps in their brains: The main pcb's design was finished, but marketing factors forced simmons to add the amp, so this was the only way.
The amp is fed from the mix out by a shielded wire, but the connection acts like an antenna for all noise, buzz and hum. But if you run the mix out to a mixing console, you can use the console's phoneamp. If you don't need the SDS9's mix out, you can plug an external headphone amp there. So: Simply ignore SDS9s headphone jack.
Greetings
Michael 
 

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