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Help/Advice needed on vintage DBX gear

I'm looking for some advice and assistance in using some older components that I recently re-discovered in my possession. I'm setting up a vintage audiophile stereo system for my house. I'm employing a pair of Crown DC300 power amps with a Crown IC150 preamp, which has two tape monitor circuits. I'll be running a DBX/BSR equalizer/spectrum analyzer and a dynamic low frequency synthesizer between the amps and preamp. Sources will include a pair of turntables, a cassette deck, tuner and a DBX CD player along with a Phillips CD recorder/duplicator. Most of what I'll be doing is listening to vinyl and transferring much of my extensive vinyl collection to CDs.

What I need advice and help with are two pieces of vintage DBX equipment. One is a DBX model 119 expander/compressor and the other a DBX model 124 noise reduction unit.

First, would it benefit to use both pieces? If not, which would be more beneficial to use for reduction of turntable source noise for ultimate recording to CD?

Second, how would you connect this piece of equipment? (IF it's the 124, I already know to Siamese channels 1&3 and 2&4)

Third, if both can be used, how would those connections be achieved?

If anyone can help, please email me at theflash52@live.com, and thanks in advance.

valle3452's picture

Help/Advice needed on vintage DBX gear

Hi. It's a handful that you've got there.
My first suggestion is to not connect anything between the preamplifier and your power amps. Any and all of the external sound processors that you list should be connected to your preamp using the Tape monitor loops that it already has. Don't worry too much about the dbx 124 which is an encode/decode unit which means that whatever you record with it will need to be played back on it too to make any sense of it. It would normally sit between your preamplifier and a tape deck but while it's a cool gadget there's nowadays no real practical use for it unless you are recording your vinyl to tapes and those tapes are to be played back in the same room with the same stereo that you recoded them with.

The dbx 119 is another cool unit to have but I would not recommend that you use it to record with. In fact I would normally make straight and natural recordings first and then leave all the processing to be done at the time of playback. Cleaning your records can do wonders for your analog to digital conversion results.

I would connect the turntables, tuner and CD to the preamp in their dedicated inputs, then the equalizer to the preamp using one of the Tape Monitor loops first but the return from the Eq would go to the dbx 119 first then from the 119 to the preamp's tape return. Then I would connect the CD recorder to the Tape Monitor loop built into the equalizer itself. Under normal conditions your recordings done this way would be non-processed but on playback they would get Eq'd then Expanded and then sent to the amps. If the above makes sense and you succeed hooking those items up then you shouldn't have issues hooking up the tape deck on the second Tape Monitor Loop of your preamp and by using the dubbing controls you can then send its output first to the Eq, then the 119 and then back to the preamp for volume and out to the amps.

Good luck!

Help/Advice needed on vintage DBX gear

The dbx noise reduction unit is for tape encode/decode use only. Not useful for anything else.