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MicroFrame Amplifier Modules MP2

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MP-2

The MP-2 is a one-in, two-out mic-pre distribution amplifier with front panel variable gain from +20 to +75 dB, incorporating the circuitry used in our famous MP-4 Mic-Pre. Like the LA-1, the MP-2 has a bicolored LED that indicates signal presence and the onset of overload. In addition, the card may be used wherever 20 dB or more of amplification is needed and minimum noise is desired.

With the MP-2 at or close to it's microphone, minimum interference enters the system from power lines, longer lines may be driven, and existing consoles achieve state-of-the-art performance. The balanced output section uses a current boost integrated circuit that is almost totally free from crossover distortion. It is ideal for anyone desiring maximum performance from analog or digital recorders, sound reinforcement, and live broadcasts, utilizing today's superior microphone technology.

NOTE: PH-1 phantom power supply cards are required if phantom power is needed across the MicroFrame™.

Features
  • • Front panel variable gain from +20 to +75 dB
  • • 1 dB noise figure, -130 dBu EIN
  • • Switchable 70 Hz low cut filter
  • • A 20 dB switchable attenuator
  • • Two outputs per module
  • • 300 mA high current output
  • • Dynamic range > 120 dB
  • • CMRR > 100 dB to 2 kHz, 65 dB @ 10 kHz
  • • THD = 0.0009% @ 20 kHz (A = 40 dB)
  • • Bandwidth = or > 500 kHz (RF free)
  • • +48 V phantom power capability (See note below)
  • • Superb RF immunity

Price: $230.00


THD+N and Phase vs. Freq

The MP-1 is the second in the series of very high performance audio amplifier and signal processing modules for the MicroFrame™. The MP-1 uses the same topology that is found in the now highly regarded MP-4 microphone preamplifier from Benchmark. Benchmark preamplifiers are used by Telarc Records, The Boston Symphony, Deutsche Grammophon, National Public Radio, NBC's "Nightly News" with Tom Brokaw, among many others.

The performance of the MP-1 is state-of-the-art, and features; A gain range of 6 to 75 dB, (including 20 dB pad) with an adjustable maximum gain limit trim, to limit the gain range when using high sensitivity microphones. It has a noise floor that is within 1 dB of the theoretical limit, a bandwidth greater than 200 kHz, THD @ 20 kHz = 0.0009% (A = 40 dB), a maximum input level of +21 dBu, CMRR @ 2 kHz =100 dB, and @ 10 kHz = 65 dB. It has outstanding RF immunity due to it's common mode input filter, and the dynamic range is greater than 120 dB. Transient Intermodulation Distortion is virtually nonexistent, with the 1 kHz difference twin tone CCIF curve flat to 70 kHz. All electrolytic capacitors are paralleled with large film capacitors. The preamplifier is ultra transparent! Call for a copy of the review of the MP-4 (formerly the MIA-4) by the late Hugh Ford of Studio Sound Magazine, for further information.

In addition to having the extraordinary performance of the MP-4, the MP-1 incorporates a switchable 70 Hz low cut filter, and the bicolored signal presence and onset of overload indicators found in the LA-1. The signal indicating LED can be strapped to indicate either pre or post filter. The module also has the same balanced output section found in the LA-1 described above.


The MX-1 Mix Amplifier Option

The MX-1 is a sixteen input mixing module that mounts in the rear of the MF-1 frame. Mix any or all of the modules' outputs into the low noise MX-1. The balanced output is like that of the LA-1 or the MP-1 with a high current (300 mA), buffered, 60 ohm drive capability.