Just wanted to share a email I received from Rob at Coherent Source Service re the Electronic Bass Equalizer module that the CS 3.5 uses:
Not sure who else here owns 3.5's or uses the Bass Equalizer, but I figured I'd share just in case. At any rate, my module does exhibit the crackling noise Rob mentions in his email, so I will most definitely send mine in for service. The $150 flat rate he's quoting seems very reasonable, especially in the world of hi-fi services!Hi Arvin,
Thank you for the kind words. Also thank you very much for the ownership of our CS3.5’s, they truly are stunning performers. As for the CS3.5 Bass EQ, there are a few issues with age. With age the eq’s will develop some DC negative voltage output, at the output jacks. This DC voltage at the outputs Usually 1or 2 volts will cause weak and/or distorted signal output.The problem is almost always caused by an FET which has developed a short due to static voltage being applied to the output during hook-up. EQ’s with serial numbers above 3770 have had this circuit removed. I also find that some EQ’s, can cause cracking and popping, due to dirty trimpots. Most of these EQ issues can be corrected by cleaning and adjusting of the channels biasing circuitry. The EQ service is a standard rate of $150. Please let me know if you would like to set ups a return for servicing the EQ. As for the caps. It is rare that a problem occurs, and is usually a factory maintenance issue.
Thanks for your business,
Rob Gillum
Coherent Source Service
763 Newtown Pike Ste. 130
Lexington, KY 40511
859-554-9790
Arvin