Seymour Duncan STC-3p hiss noise

[babbGR]

Hi there all,

I recently installed on my Ibanez SR345 bass a Seymour Duncan STC-3p preamp, but I noticed that there is alot of hiss noise (not hum) that is audable even when volume control is all the way down on the bass. The noise does not go away if i touch the bridge so it is not a bad grounding. Anyone else has the same problem with STC? I have rechecked all solder connection and they seem ok. Any ideas?

Best Regards,

 

[Funkfingers]

Re: Seymour Duncan STC-3p hiss noise

Welcome to the forum.

The battery-powered circuitry of the STC-3P generates hiss. In all probability, you have the pre-amp in circuit after the volume control.

 

[babbGR]

Re: Seymour Duncan STC-3p hiss noise

Welcome to the forum.

The battery-powered circuitry of the STC-3P generates hiss. In all probability, you have the pre-amp in circuit after the volume control.

Hi there,

I have doubled checked yesterday all connections, and rerouted cables so that cables from battery dont go in parallel with hot wires from pickups and pots, also re-soldered some wires that seems little off. I have double checked that all connections are according to the manual.
I need to point out that i made an incorrect statement on my original post, and it seems that hiss does lower when you lower the volume, but is unaffected if you lower mids and highs on the EQ, and of course it goes wild when you boost highs. Am i missing something?

Regards,

Harris

 

[Funkfingers]

Re: Seymour Duncan STC-3p hiss noise

Am i missing something?

No. To some extent, the majority of onboard pre-amp circuits introduce background hiss. The more gain your amplification adds, the more noticeable the hiss becomes.