Dorrough 380-DE Digital Loudness Meter-57dB, 32-96ks

BH #DO380DE • MFR #380-DE
Dorrough 380-DE Digital Loudness Meter-57dB, 32-96ks
Protect your Gear
Add a protection plan from $109.99
Russell H., B&H Expert

True Know-How

Ask Our Experts


Dorrough 380-DE Overview

  • 1Description
  • 2Straight Line Display
  • 3Dual Channel Meter
  • 4Peak and Average Metering
  • 5Right and Left Inputs for Stereo Mixing

The Dorrough 380D2 Digital Double Scale Loudness Meter -57dB 32-96k is a two-channel digital loudness meter in AES/EBU linear style, designed for insertion directly into the digital data-stream. It has a dual-channel vertical linear display with -57dB headroom, and an external power supply.

This model is designed for console mounting, rackmounting, or custom installations. It is built with XLR, DIP switch assignments, and mini DIN pin out. A mating connector is supplied prewired to the supplied power pack. A wired remote-control option is also available.

Straight Line Display

The 380 Series is functionally identical to the 40 series, except that the 380s have a straight-line scale designed for applications with limited vertical space. These easy-to-read meters are made to install easily in a custom console or in a rack with optional rack mounts.

Dual Channel Meter

These meters are ideal for situations where many channels must be monitored in limited space, such as a mobile news van or crowded control room. The close side-by-side positioning of the two monitored channels facilitates critical comparisons.

Peak and Average Metering

The Dorrough 380 digital meters feature both peak and average level display simultaneously, over indication, and selectable peak hold. They conform to all AES 3 (1992) specifications, and are compatible to 96ks.

Right and Left Inputs for 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 that causes a mix to seem louder. This is especially important in preparing stereo program material for broadcast, while still being able to maintain monaural compatibility.

Dorrough 380-DE Specs

Input Impedance20k Ohm balanced, 10k Ohm single-ended, +/- 2%
Common Mode Rejection Ratio80 dB at 60 Hz, 60 dB at 20 kHz (balanced mode)
Input Sensitivity-10 dB for full-scale display
Maximum Input Level+24 dB before clipping
Signal Path Bandwidth10 Hz - 25 kHz, +/- .25 dB
Signal Path DistortionLess than 1% THD at 1 kHz, +24 dB input
Sum ErrorLess than 0.1 dB at 1 kHz
Difference ErrorLess than 0.1 dB at 1 kHz
Display Resolution40 LEDs, 1 dB/LED except model 60D, +/- 0.25 dB.
Step Size Error+/- 0.25 dB
Absolute ErrorFull Scale -39 dBu: +/- 0.25 dB model
Drift+/- 0.25 dB
Average Time Constant600 mS, +/- 6%
Peak Acquisition Period10 uS, to full-scale, sine input 25kHz
Peak Attack PeriodVirtually Instantaneous
Peak Decay Period180 mS, from full-scale to all LEDs off
Display Update RateApproximately 10 mS
Display Duty CycleDisplay Time, AVERAGE, PEAK HOLD - 75%; Display Time, PEAK - 100%
Power Supply Input Range117/237 VAC RMS, -20% to +10%, 50-60 Hz
Calibration ControlsNone needed
User ControlsLeft/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 PortDB-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)1.5 x 7.0 x 5.0" (in.) (0.6 x 2.8 x 2.0cm)
WeightNot Specified by Manufacturer
See any errors on this page? Let us know