Topic: DPA 4099 wiring

[dberkowitz]

Hi folks, this is a little bit outside the applications for tapers, but having seen the discussions I think you folks are the ones to answer the questions I have. 

I have a client that want's to wire in a DPA4099 mic in their guitar.  The existing setup is a K&K Sound soundboard transducer which is wired to a 1/4" TRS jack.  Is there a way to wire the DPA to that stereo jack and have it work with K&K's Quantum Blender preamp and still split the signals for mic and transducer.  Here's the link to K&K's preamp.
http://kksound.com/quantumblender.html

Thanks in advance,

David

[jefflester]

Could be, but it depends. Why does the existing transducer use a TRS? If it is just  passive piezo-like transducer it would justneed a standard mono TS 1/4" jack. If the transducer is using all three wires (why?),I don't think it would work.

[Gutbucket]

From what I can tell from on the K&K site, their transducers, pickups and mics are all two wire, but are connected to a TRS Jack wired mono (Ring & Sleeve shorted) when used alone.  They probably only use TRS jacks instead of TS for these applications for a couple reasons: 1) to allow them to stock only one component for each different jack style; 2) to provide an simple path for upgrading to a two channel output like you are doing. 

As long as the transducer only has two wires as I suspect it does, you'd simply wire the transducer's hot lead to Tip and ground to Sleeve, and the mic's hot lead to Ring and ground to Sleeve on the TRS jack.  Which transducer is wired to Tip and which goes to Ring doesn't really matter if using a breakout cable to feed the mono inputs on the preamp, but the the stereo input jack on the preamp expects the above wiring for mic/pickup into channel 1 and transducer into channel 2.  That way your client can simply connect the guitar to preamp using a single TRS>TRS cable.