Kel Audio HM-3C
Cardioid Condenser Microphone
The HM-3C is a side-address cardioid FET condenser microphone designed for neutral, uncolored, “unforgiving” reproduction.
Like its sibling, the HM-1, the HM-3C is a small-diaphragm condenser. The two mics share a capsule design, which we believe uses a 12.5mm diaphragm in a 20mm housing, and a 3-micron diaphragm. The capsule is a “true condenser” (externally biased).
Kel Audio
The HM-3C starts with a 20mm capsule based on the same design used in our popular HM-1. The polar pattern is tighter… and the capsule voicing and circuit give the HM-3C a slightly more open top end, while starting to roll off below 50Hz to control subharmonic rumble.
The mic’s frequency chart ends at 40Hz, and shows a -5dB dip at 45Hz. On the HF end, there is a gentle rise to +3dB at 6500Hz; the mic’s output stays relatively flat at +2dB through 20kHz.
We believe the HM-3C amplifier circuit is transformerless.
The mic ships with an elastic shockmount in an aluminum flight case.
The Kel Audio HM-3C is also known as: HM3C.
The mic was released in 2009.
Specifications
| Frequency Response - CardioidClick Graph to Compare! |
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| Pickup Patterns | Pads & Filters |
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Cardioid
(15.8 mV/Pa; 45 - 20,000 Hz) |
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| Capsule Dimensions | Impedance | SPL/Noise |
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| Diaphragm diameter: 12.5mm Capsule diameter: 20mm Diaphragm gauge: 3 microns |
150 Ohms (Low) | Max SPL: 130 dB Self-noise: 18.0 dB(A) |
| Weight | Length | Max Diameter | Interface(s) |
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| n/a | n/a | n/a |
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| Power Specifications |
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