Converting JBL 5600-2B mixer for direct outs - diyAudio
Go Back   Home > Forums > Source & Line > Analog Line Level

Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 11th July 2015, 12:19 AM   #1
diyAudio Member
Join Date: Jan 2010
Default Converting JBL 5600-2B mixer for direct outs

I picked up an old JBL 5600-2B preamp mixer on a whim recently. It's got 4 (unbalanced) microphone inputs, and the unit acts as a mixer outputting a stereo output.

I tracked down the manual and it seems the microphone inputs are high impedance, high gain. I thought maybe it'd be perfect for use as a preamp with my ribbon mics, which need exactly that: high impedance and high gain.

I'm not that saavy in electronics just yet, so I was wondering if someone could help me convert each of the microphone preamps into direct outs?

I've attached the schematic.

Attached Images
File Type: jpg JBL-5600-2Bmanual-5.jpg (841.3 KB, 20 views)
  Reply With Quote
Old 11th July 2015, 06:03 PM   #2
diyAudio Member
Join Date: Nov 2004
Location: Germany
This won't work the way you want. First off, the thing only has a mono output, and most of the signal chain is only present once. Each mic input only features a FET preamp of relatively moderate gain, no more than about 28 dB and probably less, with highish output impedance (pretty much the 12k load resistor). At the very least, you'd have to hack a buffer into the circuit for each channel. Good luck with the oldschool rat's nest of p2p wiring lurking underneath the chassis.
  Reply With Quote
Old 11th July 2015, 07:04 PM   #3
diyAudio Member
Join Date: Jan 2010
Drat. And here I thought I had something workable.

Guess I'll just have to gut it and build a new circuit into the enclosure.
  Reply With Quote
Old 11th July 2015, 07:49 PM   #4
diyAudio Member
Join Date: Jan 2010
Does anyone know of a good ribbon mic pre design? Or something that's high impedance input, high gain?
  Reply With Quote


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
JBL 2123h mid - horn loaded or direct radiator Kwikas Multi-Way 6 16th May 2013 12:19 PM
Converting surround receiver to digital outs rastanearian Digital Line Level 3 9th October 2009 02:53 AM
Kenwood KR-5600 Service Manual hga Solid State 1 8th July 2009 09:23 PM
converting audio mixer to 12 v dc Gogaudio Car Audio 0 29th January 2004 01:57 PM

New To Site? Need Help?

All times are GMT. The time now is 04:14 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.
Copyright 1999-2015 diyAudio

Content Relevant URLs by vBSEO 3.3.2