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Description

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The API 3124+ is a discrete, high quality, compact, 4-channel mic/line preamp, plus D.I.

It is equipped with the RE-115 K mic input transformer and the proprietary API output transformer found in the 512c single mic pre and throughout the API product line. The unit has an internal 48-volt phantom power supply, which is switchable for each channel, as well as -20dB pad switches that affect both the mic and Hi-Z instrument inputs, both located on the front panel.

Another feature of the 3124+ is that it can provide up to 65dB of gain to an output clip level of +28dBu. Additionally, the Hi-Z front panel inputs feed directly to the op amps, which allow a low level input such as a guitar or bass to be amplified without a matching transformer or direct box. These Hi-Z inputs can take input levels as high as +20dBu, making them perfect for keyboards and other high level devices. The mic preamp outputs are on rear panel male XLR connectors.

Features
  • Uses API 2520 Op Amps
  • Classic API console circuit
  • Four female XLR mic inputs
  • Four front panel 1/4" Hi Z instrument inputs
  • Front panel polarity switches
  • Front panel -20dB pad switches
  • Front panel mic/instrument switches
  • Front panel 48V power switches
  • Outputs clip at +28dBu
Specifications
Input Impedance: 1500 Ohms Mic, 470 K Ohms Un-Balanced, HI-Z in
Output Impedance: Less than 75 Ohms Channel Outputs
Nominal Levels: XLR Channel Output +4 dBu

Stereo Output Level

  • Unbalanced: nominal -2
  • Balanced: +4
  • Clipping Level: XLR Channel Output better than +28 dBm
    Frequency Response: +0, -5, 10 Hz to 20 kHz (-.5 at 10 Hz)
    Noise EIN: -129 Mic, -125 Un-Bal. Actual
    Measured Noise: Better than -91 dBm / below Nominal +4
    Distortion: All Outputs at +4 out, .03%, at +22, .09% Max

    Gain Range

    • 150 Ohms Input 10 dB min
    • 65 dB Max (inc. PAD)
    • Un-Bal. Input 14 dB min
    • 50 dB Max
    • VU Meter: Calibrated for XLR Outputs, OVU=+4 dBu, (-12, -6, -3, 0, +3, +6, +18)
      Controls: GAIN, PAD (20 dB), 48 Volts, POL (polarity), MIC (mic/un-bal), VU, AC
      Power Consumption, Quiescent: 19.2 Watts
      Size: 19" X 1.75" (1U) X 11" Deep
      Size (Boxed for Shipping): 23.25" X 6.5" X 16.5"
      Actual Weight: 10.38 lbs
      Shipping Weight: 14.06 lbs

API 3124+ or JLM TMP8?

hi guys, i need a multi-channel pre-amp, mainly for tracking drums. i've narrowed it down to these 2 pres, which work out to roughly the same cost. the JLM is twice as many channels, but the API is an API. if these are in the same league in terms of sound (not necessarily identical but equally good) i would jump on the JLM in a heartbeat.

api 3124 for classical guitar and "all purpose"?

Hey, I'm thinking of getting better preamps.

I'd like to use them to record nylon string guitar both classical stuff and pop/jazz, but I'd also like them to be as "all purpose" as things can be ranging from vocals to drums from the aforementioned classical to alt.rock or blues rock or trippy acid rock a la Jefferson Airplane or popressive pop stuff.