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Dorrough 10-A Analog Loudness Meter + 14dB

B&H # DO10A Mfr # 10-A
Usually ships in 7-14 business days

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This is a Special order item. Est. arrival at B&H is 7-14 business days (subject to availability). Your order will be charged at time of shipment. Item is non-cancelable and non-returnable.
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You Pay: $459.00

The 10-A Analog Loudness Meter +14dB is a smaller single channel version of Dorrough's standard 40-A loudness monitor, with Phoenix (euroblock) connectors. This meter requires rack mounting and has an external power supply.

Actual Energy Display
Dorrough Loudness Meters display actual energy content of the program material, regardless of frequency, while still indicating the peak amplitude of the complex audio signal. This feature allows all program material to be adjusted for equal perceived loudness while protecting the peak of the waveform.
Peak and Average Level Metering
The 10-A, like all Dorrough loudness meters, simultaneously displays peak and average. The relative difference, in dB, between these two ballistics is derived from the integration time of the persistence scale.
Stereo Mixing
With one instrument, the operator can easily see the stereo mix and avoid classic in-phase/out-of-phase problems as well as center channel buildup causing a mix to seem louder. This is especially important in preparing stereo program material for broadcast, while still being able to maintain monaural compatibility.
Input Impedance 20k Ohm balanced, 10k Ohm single-ended, ±2%
Common Mode Rejection Ratio 80dB at 60Hz, 60dB at 20KHz (balanced mode)
Input Sensitivity -10dB for full-scale display
Maximum Input Level +24dB before clipping
Signal Path Bandwidth 10Hz - 25KHz, ± .25dB
Signal Path Distortion Less than 1% THD at 1KHz, +24dB input
Sum Error Less than 0.1dB at 1KHz
Difference Error Less than 0.1dB at 1KHz
Display Resolution Less than 0.1dB at 1KHz
Step Size Error ± 0.25dB
Absolute Error Full Scale -39dBu: ± 0.25dB model A,B,C
Drift ± 0.25dB
Average Time Constant 600mS, ± 6%
Peak Acquisition Period 10uS, to full-scale, sine input 25KHz
Peak Attack Period Virtually instantaneous
Peak Decay Period 180mS, from full-scale to all LEDs off (models A, B, C)
Display Update Rate Approximately 10mS
Display Duty Cycle Display Time, AVERAGE, PEAK HOLD - 75%

Display Time, PEAK - 100%

Power Supply Input Range 117/237VAC RMS, -20% to +10%, 50-60Hz
Calibration Controls None Needed
User Controls Left/Right input sensitivity Option DIP Switch

A) Peak Auto [ON]

B) Difference Mode [ON/OFF]

C) Over Level Alarm [ENABLE]

D) Under Level Alarm [ENABLE]

E) Auto ARMP

User Port DB-9 Connector A) Alarm relay closure contacts 1 form C, 1A, 30V AC or DC

 B) Mode control switch (user supplied)

C) PEAK function switch (user supplied)

Dimensions (WxDxH) 4.25 x 3.0 x 2.0" (1.7 x 1.2 x 0.8cm)
Weight Not specified by the manufacturer
Dorrough 10-A Analog Loudness Meter + 14dB
  • External Power Supply
  • 2-Year Warranty
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    Required item: Mounting Hardware (not included) is required to operate this device.

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