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BIA - beltpack IFB amplifier
communications monitor with embedded
loudspeaker and headset jack
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The BIA (Beltpack IFB
Amplifier), battery-powered belt-pack unit,
allows either loudspeaker or headphone monitoring of a communication
or audio feed, and is typically used with a presenter's earpiece as
part of an IFB kit.
Standard Features
• Selectable limiter: prevents clipping distortion and damage to
hearing with earpieces & headphone types
• Built-in 0.5W loudspeaker & amplifier (power to the amplifier is
cut when headphones are connected)
• Loop-through male & female XLR connectors enable several units to
be driven from a single feed.
• Headphone output on “A” gauge 6.35mm jack.
• Very low battery consumption.
• Low battery voltage indicator.
Description
The input gain is controlled by a potentiometer, a 0/20dB gain
switch and a selectable limiter. The limiter can be used to ensure a
safe listening level over a wide range of input signal levels and
also improves signal intelligibility by preventing clipping of the
output signal as the battery discharges. The balanced output stage of the headphone amplifier drives
earpieces and headphone, having either mono or stereo jack plugs, with
connections to the tip and ring only .
Although this cause headphones to driven in anti-phase, intelligibility of speak
is unaffected, and the higher impedances of the series connection ensures the
most efficient impedance match to the output stage.
BIA
is compatible with similar apparatuses of other brands in commerce.
Specifications
- Input impedance: 200K ohm, active balanced
- Input connectors: XLR3 plug & socket
- Input signal limiter threshold (Max Gain): Adjustable
Battery voltage: 6-9 V |
||
Gain switch setting |
0 dB |
20 dB |
Max input level |
+14 dBU |
-6 dBU |
- Max headphone O/P level (no limiter): +15dBU @ 9V, @ 6V (no load)
- Max headphone O/P level (with limiter): Threshold level +6dB (no load)
- Headphone output impedance: 280 ohm
- Battery voltage for constant limiter output: 9V to 6V
- Maximum Loudspeaker power: 0.5W with 9V battery
- Power supply: 9V PP3 battery (500mAh typical)
- Low battery indicator: threshold 6V
- Dimensions: 120 mm x 78 mm x 43 mmWeight: 250g
- Case: Alluminium Alloy, clear Anodized
In accordance with constant improvement policy of products, El.Man (Elettronica Mangione) reserves the right to modify without notice and at any time, features and prices of its own apparatus.
Other Elman intercom and beltpack
4WBB - 4 Wires Beltpack BOX (usable with tbp8)
BIA
- Beltpack IFB Amplifier (usable with tbp8)
Dual TBP (Dual Talkback
Plus) 8 channels intercom
EL4400/S - Terminal for TBP10 10 channels
intercom
Genius
Intercom - 7 channels with interrupted feedback
TALKBACK PLUS Instant Program 4
Wires Intercom (1RU)
TBP8
- 2/4 wires 8 channels intercom with interrupted feedback (1RU)
TBP10 - 4 wires handsfree full duplex 10 channels intercom with interrupted feedback (1RU)
TBP16 - 4 wires handsfree full duplex 16 channels intercom with interrupted feedback (2RU)
TBU - Telephone Balance Unit (telephone to 4 wires) (usable with tbp8)