XQP 500 series audio devices

API Lunchbox full of XQP modules.

AES 2014 Interview.

Nice guys. Yes we are.

API are nice guys too. We love the VPR Alliance.


VTL5C1 VACTROL opto pictured at top, Silonex NSL-32R3 opto at bottom.

Optocouplers seem to be a hot item to manufacture one minute and not the next.

The beloved VACTROL, specifically the VTL5C1 in use since 1997 in what is now the XQP 531A Optical De-esser, has gone extinct - at least from the official manufacturer. The VACTROL is the heart of not only the 531A but also the 545 Optical Disrupter.

There are clones out there, and we will soon be experimenting with some to find a replacement. Hopefully there will be a bright future for the 531A, and 545, and all the products on the market that use these optocouplers.

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► Last updated 1/20/17 ◄     © 2017 XQP All rights reserved