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Bel Digital Audio BM-A2-16SHD 16 Channel Audio Monitor

High-quality 2U 16 channel audio monitoring unit with SDI de-embedding
Part No: BM-A2-16SHD

The Bel BM-A2-16SHD is a no-compromise, 2U, 16-channel audio monitor suitable for operation in broadcast control rooms or OB vehicles where SDI is the standard video format. It is able to de-embed 16 channels of audio from 3G/HD/SD SDI, display the levels on individual front panel meters, and to provide stereo audio monitoring of any combination of all 16 channels.

Condition: new

in stock
£4,644.00 £3,870.00 ex VAT
You will earn 3870 eDiscs for buying this product
£4,644.00 £3,870.00 ex VAT
Bel Digital Audio

Product Description


The unit is very simple to use: all source selection and main monitoring setup is done from individual controls on the front panel without any necessity for menu navigation.

In addition to two auto-detecting 3G/HD/SD SDI inputs, the monitor has eight balanced analogue inputs (D-sub) and eight AES3id pairs (also accepts SPDIF sources). Analogue inputs 1 and 2 are duplicated on a pair of XLRs. A re-clocked loop-through output is available for the selected SDI source providing a convenient and cost-effective method of switching SDI feeds to an external monitor. The 16 channels (of the selected source) are also routed to eight AES3id outputs and Channels 1 to 8 to balanced analogue outputs (D-sub). In addition, the stereo audio monitor mix is available as a separate balanced feed at a pair of XLRs.

Audio levels are metered on sixteen 53-segment, high-resolution, tricolour LED bargraphs. User setup options allow a choice of four scales and ballistics (including BBC or DIN PPM, VU and AES/EBU), and also colour transition points and peak hold.

The audio quality is remarkably high for an in-rack audio monitor; in addition to the front panel stereo speakers a third low frequency driver is mounted internally to provide an impressively extended low frequency response. Users have full flexibility in assigning any channel to left, right or both speakers (or neither), and automatic level attenuation compensates for monitoring multiple channels. A ¼” jack headphone output socket is provided on the front panel. When in use, the internal speakers are muted. Audio level at the rear panel analogue outputs may be configured from a setup menu either to be fixed or to follow the main volume control.

The BM-A2-16SHD is fitted with a display screen, enabling easy device configuration and display of signal status information and a phase correlation indicator. A Dolby decoder card may be retrofitted to allow decoding of Dolby E, Dolby Digital or Dolby Digital Plus signals; the card also permits loudness measurement (compliant with ITU-R BS1770-2) of the selected sources.

The unit, built to a very high mechanical standard in a stainless steel 2U 19” enclosure, giving the best possible isolation from external interference and vice versa, and is fully RoHS compliant.


  • Metering and monitoring of up to 16 channels of audio   
  • 16-channel audio de-embedding from SDI sources   
  • Auto-sensing SDI inputs (SD/HD/3G)   
  • Additional sources: AES3id x 8 (also accepting SPDIF inputs) and analogue x 10   
  • AES3id outputs of all 16 channels   
  • Comprehensive I/O facilities, including 2 x SDI, 8 x AES-3id pairs, 10 x analogue
  • Analogue outputs of channels 1 to 8 of the selected source
  • Very simple to use: all primary functions have dedicated controls
  • Display for input status, phase correlation indicator, metadata and unit configuration
  • 2 x full-range front panel speakers plus internal LF sub-woofer
  • Any channel may be monitored on either speaker, including combinations and groups
  • 16 high resolution, tricolour LED meters with adjustable colour transition points and peak-hold facility
  • Four standard meter scales/ballistics, user selectable
  • Audio output levels are auto-adjusted for consistent volume when monitoring multiple channels
  • Optional card for Dolby® decoding and loudness measurement


Additional Information


Audio Inputs

  • Digital AES3-id: 8 x 75W ohm (BNC connector)
  • Sample Rate: 48 kHz
  • Analogue: 8 x differential impedance 25k ohm. 25 way ‘D’ type connector; 2 x XLR3F



  • Input: 2 x 3G/HD/SD SMPTE 424M, 259M, 296M, 274M, 292M
  • Output: 1 x SDI loopthrough



  • Bargraphs: 16 x 53 element tricolour with adjustable colour break points


Analogue Monitor Outputs:  2 x XLR3M

  • Max output level: +15 dB
  • Noise + THD: -98 dB


Analogue Channel Outputs x 8: 1 x 25 way ‘D’ type connector

  • Max output level:  +10 dB
  • Noise + THD: -108 dB w.r.t. clipping


Digital Channel Outputs x 16: 8 x 75 ohm BNC

  • Digital AES-3id


Frequency response

  • All analogue outputs: 20 Hz to 20 kHz ±1 dB


Main drive amp

  • Noise + THD: -80 dB w.r.t. maximum output


Speaker driver units

  • Peak acoustic level (@2ft): 100 dB SPL
  • Shielding: Magnetic


Scales and Ballistics

  • DIN PPM: Overall dynamic range: 55 dB (+5 to -50 dB) Attack time: 10 mSec Fallback: 1.5 Sec per 20 dB decay
  • BBC PPM: Overall dynamic range: (+12 to -12 dB from mark 7 to mark 1) Attack time: 10 mSec Fallback: 2.85 Sec (from mark 7 to mark 1)
  • VU: Overall dynamic range 23 dB (+3 dB to -20 dB) Attack time: 300 mSec Fallback: 300 mSec
  • AES/EBU: Overall dynamic range 60 dB (0 to -60 dB) Attack time: 1 mSec Fallback: 1.5 Sec per 20 dB decay



  • 19” Rack Mount: 2U high.
  • Outline Dimensions: 483 mm(W) x 256 mm(D) x 89 mm(H) Outline Dimensions: 19 inch(W) x 10 inch(D) x 3.5 inch(H)


  • 90 - 264 VAC 50/60 Hz Autoselect, Fuse 4A HAC


  • Temperature 0 °C to 30 °C. Humidity 70% max (non-condensing)



  • 6 kg (14lbs)