SoundConnect - Single Channel Microphone Power Supply

SoundConnect is a microphone power supply and amplifier designed for use with the Listen SCM microphone and also compatible with reference microphones from other manufacturers including B&K and GRAS. Its switchable polarization voltage (0, 28, 200V) allows it to be used with both traditional and pre-polarized versions of these microphones.

SoundConnect extends the dynamic range of your measurement system by as much as 80 dB from 2.5 µVrms to 50 Vrms. This offers a better signal to noise ratio for your measurements and therefore greater accuracy. It also offers two signal attenuation settings to avoid clipping with high-level signals.

A stepped level indicator simplifies gain-setting by offering clear visual feedback of the signal level. Cascaded attenuator and amplifier stages ensure amplification linearity with a minimum of noise and distortion. This is particularly useful for measuring low sensitivity microphones, self-noise, and transducer distortion.

SoundConnect features a LEMO input connector, making it compatible with most measurement microphones. It also has a BNC line in, a BNC output, and an RCA output, simplifying connectivity to a SoundCheck system. Its housing is a rugged all-metal construction that can be used in either a horizontal or vertical orientation, making it suitable for harsh production environments as well as the R&D laboratory.

SoundConnect is made in the U.S.A. and is designed to UL and CE requirements.

Features

• Cost effective
• Simple to use
• Compact and rugged
• BNC and LEMO connectors for compatibility with wide range of microphones
• Full performance from Brüel & Kjær & compatible microphones and preamplifiers

Setup Diagram

Specificaitons

- Input Connectors: BNC and LEMO
- Output Connectors: BNC on front panel in parallel with RCA phono on rear panel
- Frequency range: 20 Hz to 100 kHz (± 0.1 dB) (-3 dB at 5 Hz and 200 kHz)
- Gain: -20 to 60 ± 0.2 dB in steps of 20 ± 0.1 dB
- Preamplifier supply: 120V @ 2mA single or ± 14V dual
- Input Noise: <1.8μVrms (A-weighted), <3.0μVrms (20 20 kHz), @ 20 60 dB
- Total Harmonic Distortion: <0.003%
- Microphone polarization voltage: 0, 28, 200 V ± 1%, Stability better than 0.5% for ± 10% variations in mains-voltage
- Input impedance: 1 MΩ
- Output impedance: 600 Ω
- Output attenuator: 0 dB (7.07 Vp), -8 dB (2.82 Vp), -14 dB (1.41 Vp) ± 0.1 dB
- Peak Level Meter: Indication at -20, -10, 0 dB, and overload relative to selected output range ± 0.5 dB
- Power Requirements: 115/230 VAC ± 10% switchable, 50 – 60 Hz, detachable IEC power cord
- Dimensions: 5.5″ H (139.7 mm), 2.5″ W (63.5 mm), 7.5″ D (190.5 mm)
- Weight: 2 lb. (910 g)
- Operating Temperature: 0° to 35° C