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dbx, Inc. is an American producer of professional audio recording equipment owned by Harman International, a subsidiary of South Korea-based company Samsung Electronics. It was founded by David E. Blackmer in 1971. The original company goal was: "To get closer to the realism of a live performance.

dbx 161-Mods

Working on two of these beauties right now. Nice design, nice PCB layout. The customer wants new caps, a few power supply repairs and to add Jensen input and output transformers to these normally unbalanced units. The 160 (the famous unit) uses the same PCB as the 161 but a has a solid state balanced input and output circuit populated. This mod, IMO, is way better ;)

dbx 386 Power Transformer

Hi there! I have a dbx 386 dual channel tube preamp. It was out of service for some time and when I recently put it back in the rack only a couple of LEDs turn on. On inspection it seems that the larger of the two transformers supplying power to the PCB has transformed into a Gandalf No-Pass Filter ("None shall pass!"), i.e. voltage in to the transformer is good, voltage out is 0.

dbx Quantum - upgrade success!

So.. after the dramas of trying to install OS 1.50 on my Quantum. Success!. I put up $60.00 for an old IBM Thinkpad off eBay running Windows XP. Note to all the unwary, MIDI interfaces on USB do NOT like virtual versions of windows, no matter how slick they seem to be working.

The result of the upgrade is as follows..

1.1. Multi-band chain with De-Esser
1.2. Ambience added to all Dual Mono Setups
1.3. MS-EQ added to all Stereo Linked Setups
1.4. MS-COMP (MS-Compressor, MS-Gate, MS-Limiter,

dbx 150 connection help pls

hello i have standard tape deck (not reel to reel) type
and wish to record my old cassette tapes and save them on my computer as mp3.
that`s simple part i have two dbx 150 units and if possible? like to use one as a encoding machine.
from my tape output to one unit and the other is in decode mode to decode on fly if possible?
i tryed connecting the units as stated in the user manual but no joy.
can any one help give step by step details of connecting the tape decks phono to unit.

dbx 386

Hello All

A friend gave me a broken 386 and after going though it and getting it working, I am wondering if it might be wise to add a transformer on the input. I haven't traced it out myself to confirm Bushy's trace of the circuit but it looks like its using a 4580 op amp for the first stage of amplification. This would seem to give us questionable CMRR. I have a bunch of 1:3 ratio mic level Tamura transformers. I was thinking of adding one to the input to eliminate the DC blocking Caps and increase the CMRR. Any thoughts about the wisdom of this?

Replacement plug for dbx 163x

hey all, i use the 163x in my bass rig, and when my buddy put my rack in the car's backseat, he closed the door w/ two of the racks' power wires (unknowningly) dangling out. Oblivious to this, i drove home on the highway w/ my head (svt-3pro), and compressor's power cables dragging. The only noise i noticed was on the city streets leading to my house, and it sounded just like an aging ball-bearing, like on a skateboard, roller-skate, or car.


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