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Mods for the 870

  • Microphone PartsMicrophone Parts
    The MXL 870 (and 910, which shares the same chassis) is a compatible host for the MP-V57 transformerless circuit kit, which provides a highly optimized implementation of the Schoeps CMC5 design. This gives the microphone very high output, very low noise, very low distortion, and a tune-able high frequency response to compensate for brightly voiced capsules.

    The 870 is also a great candidate for a capsule swap; the RK-47 and RK-12 would both sound more balanced and less hyped than the stock MXL capsule.

MXL 870

Pricing & Availability

  • MSRP: $260


870 Documentation

CardioidMXL 870

Cardioid Condenser Microphone

The MXL 870 is a large-diaphragm condenser billed as an all-purpose “utility” microphone.

It combines familiar MXL elements: the surface-mount transformerless circuit found in the V250 and 910 (and presumably the 2006 and V63M) with the 32mm K67 capsule found in the V63M and 2006 and numerous other models.

MXL 870 CircuitIt is a good candidate for modification; see the options in the sidebar.

In the sample we tested, the capsule’s front diaphragm was polarized at 50VDC. The mic is a good mod candidate, with replacement capsule options and also a replacement circuit option; see the sidebar listing.

The mic ships with an elastic shockmount in a cardboard box. Spare elastics for the shockmount are included.

Permalink: MXL 870


Pickup Patterns Pads & Filters
Cardioid (15 mV/Pa; 30 - 20,000 Hz)
Capsule Dimensions Impedance SPL/Noise
Diaphragm diameter: 26mm
Capsule diameter: 32mm
Diaphragm gauge: 6 microns
200 Ohms (Low) Self-noise: 20.0 dB(A)
Weight Length Max Diameter Interface(s)
335g (11.82oz) 170mm (6.69'') n/a
  • 3-pin XLR male (1)
Power Specifications
  • Requires phantom power
  • Phantom voltage: 48 ± 4v

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