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API 3124MB+ – No Longer Available

Discrete four-channel mic/line preamp with stereo mixer and transformer-balanced outputs
MFR# 3124MB+

Product Description

Both the API 3124MB+ and the 3124+ are designed with the professional engineer in mind, giving the highest possible quality four-channel mic preamp and with the 3124MB+, an audio mixer, while keeping the size and price at a reasonable level.  Several 3124MB+ mixers can be linked to increase the number of bussed channels.  Both models are equally at home in the control room, the studio, and news or recording truck, at the house console, on the stage, direct-to-DAT or at the artist's disposal for the source of his music.

The model 3124+ utilizes the same microphone preamp circuit that is used in all API consoles.  It uses the RE-115 K mic input transformer and the same output transformer that is used in all API equalizers. All four mic inputs of the 3124+ and the 3124M+ are powered by an internal 48 volt phantom power supply, front panel switchable for each channel.  Also provided is a front panel 20 dB pad switch that effects both the mic and line in.

The model 3124+ can provide up to 65 dB of gain to an output clip level of +30 dBm.  The Hi-Z front panel input goes directly to the op-amp, allowing a low level input such as a guitar or bass to be amplified without a matching transformer or direct box.  This Hi-Z input can take input levels as high as +22, making it perfect for keyboards and other high level devices.  The rear output is an XLR connector.

The model 3124MB+ is a 3124+ with the addition of a complete stereo mixer.  In conjunction with the gain control of the 3124+, the 3124M+ adds a stereo panner with a level control, and a post "fader" aux send.  The stereo panners and the aux sends are bussed to master output controls and then to the rear panel jacks. A stereo AUX return is provided to return effects or cascade additional mixers for more inputs.  The unique aux return pot acts like a panner to balance the left/right signal, yet staying stereo. It can also be used as a mono return.  A standard 3124+ can be further expanded to an "m" at the factory.  Several options for the "M" include a discrete unbalanced stereo output or a discrete balanced stereo output.

Features:

  • Uses API 2520 op-amp
  • Classic console circuit
  • Four XLR mic inputs
  • Four 1/4" un-balanced inputs
  • Front panel polarity switch
  • Front panel 20 dB pad switch
  • Front panel mic/line switch
  • Front panel 48V power switch
  • Output clips at +30 dBm

 

Product Specifications

Condition New
Tube or Solid State Solid State
Channels 4-Channel
Chassis 19-inch Rack-mount
Rack Spaces 1u
Direct Input Yes
Digital I/O No

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I would like to thank VK for the wonderful sales assistance, service and prices. This was my first purchase with you and it won't be my last. I only wish I'd discovered you years ago!
Matthew R.
I had two Grammy wins this year - Ray LaMontagne & Carolina Chocolate Drops. Both made with help from Vintage King!
Ryan F.
In almost 20 years in Pro audio buying, never did I receive a unit so well packed and exactly as described. Works flawlessly. The whole process has been so smooth. I will never hesitate to do business with you guys in the future and will recommend you to everyone I know.
Martin C.
This was my first experience buying something from Vintage King (although I surf the "used" categories on the website frequently!), and, despite being on the other side of the world, I had absolutely no trouble and everything went very smoothly.
Phil T.