CMH

Description

The SCHOEPS CMH is a wired handheld or soloist's microphone with particular immunity to plosive noise ("popping"). Because of its well-balanced frequency response it can also be used for speech pickup.

The directionality and the low-frequency rolloff of the SCHOEPS CMH microphones reduces the risk of feedback. Using the microphone at short distances increases the proportion of direct sound, and balances the built-in low-frequency rolloff with proximity effect.

The ”popping” effect on spoken consonants is substantially reduced by the built-in pop filter, and is even further reduced by the low-frequency rolloff of the microphone.

Technical Specifications

CMH 64

Pickup pattern	Cardioid
Frequency range	40 Hz - 18 kHz
Sensitivity	-37 dB (V/Pa), 14 mV/Pa
Equivalent noise level (A-weighted)	15 dB
Equivalent noise level (CCIR)	24 dB
Signal-to-noise ratio (A-weighted)	79 dB
Maximum sound pressure level (THD < 0.5 %)	131 dB-SPL
Maximum output voltage	1 V (0 dBV) with 1 kΩ load
Low cut filter	60 Hz, 12 dB/oct.
Minimum recommended load impedance	1 kΩ
Output impedance	42 Ω
Maximum cable length	> 400 m
SCHOEPS RFI Shield	Yes
Powering standard / Valid range	P48 / >20 V P12 / >10 V
Current consumption	4 mA (P48) 8 mA (P12)
Common mode rejection ratio (at 1 kHz)	> 60 dB
Output	XLR-3M, analog, 1 channel
Length	210 mm
Diameter	37 / 22 mm
Weight	190 g
Surface finish	matte gray / black

CMH 641 - Identical to CMH 64, except of:

Pickup pattern	Supercardioid
Frequency range	40 Hz - 19 kHz
Sensitivity	-36,5 dB (V/Pa), 15 mV/Pa
Equivalent noise level (A-weighted)	14 dB
Equivalent noise level (CCIR)	23 dB
Signal-to-noise ratio (A-weighted)	80 dB
Maximum sound pressure level (THD < 0.5 %)	130 dB-SPL

Variants & Options

• No. 143001: CMH 64: Handheld microphone with cardioid capsule (standard version)
• No. 143002: CMH 641: Handheld microphone with supercardioid capsule