The JM37 is a high quality, large diaphragm condenser microphone with a fixed Cardioid pattern. WE chose FET devices for both preamplifier and output stages, resulting in a mic that exhibits very pleasing audio qualities.
The capsule is manufactured in the classic "concentric electrode" design, providing smooth extended frequency response. We further enhanced the audio quality by using dynamic feedback at the capacitor element. This technique eliminates distortions, which can occur at high SPL.
The large 1.035" diaphragm is made from micro-fine Mylar and is gold sputtered. The microphone body is machined from brass, with audio connection via a balanced 3-pin XLR connector. Power is supplied via Phantom Power from either your console or microphone preamplifier.
ThreeQ:
Built into a compact ½ rack chassis, we used the same Burr-Brown IC's for the Mic Pre that you'll find in our more expensive studio channels. We then added an extremely musical EQ section and an optical Compressor, for that signature "Meek" sound.
Features:
JM37
Frequency Response Sensitivity: 25Hz-20Hz
Sensitivity: 16mV/Pa-40+/-2dB (0dB=1V/Pa 1000Hz)
Polar pattern: JM37 Cardioid, JM37-DP Cardioid and OMNI with Selectable PAD
Impedance: 200ohms
Equivalent noise level: 19dB (A Weighted)
Max SPL for 0.5% THD@1000HZ: 128dB
Power Requirement: 48V
ThreeQ
Input impedances: Mic: 1.2kohm; Line: 20kohm
Pre-amp overall gain: 0dB to 60dB
Common mode rejection: 70dB
Equivalent input noise: -128.5dBu (unweighted)
Distortion: 0.001% (below Compressor threshold)
Frequency response: 10Hz to 70kHz (-3dB)
Maximum input before clipping: Mic: +19.5dBu; Line: +44.5dBu
Headroom before clipping: +19.5dBu
Compressor threshold: +∞dBu to -20dBu (variable)
Compressor ratio: 5:1 (typical)
Compressor attack time: 1 msec to 100 msec (adaptive)
Compressor release time: 0.1 sec to 3 sec (adaptive)
EQ Boost and Cut: +/-15dB (zero phase-shift bell response)
LF Frequency: 80Hz (fixed)
MID Frequency: 300Hz to 5kHz variable
HF Frequency: 12kHz (fixed)
EQ “Q”: 0.9 (1.6 octaves)
Output Gain: -∞dBu to +16dBu (variable)
Nominal output levels: +4dBu/-10dBv (selectable)
Output impedance: 75ohm
Output Level switch: 12dB attenuation
Noise Floor: -85dBu (typical, with ~40dB mic gain)