Universal Audio 4-710d 4-Channel Mic Preamp

The Universal Audio 4-710d is a boutique quality, 4-channel microphone/line preamplifier with unique tube and solid state tone-blending capabilities-perfect for a wide range of microphone and instrument sources. This versatile multichannel preamp offers selectable 1176-style compression circuitry on each channel, plus four additional line inputs feeding 8 channels of pristine analog-to-digital conversion. Building upon UA's classic analog design approach, combined with smart modern features, the 4-710d is the most flexible preamp in the UA lineup.

At the core of the 4-710d are four channels of tone-blending "Twin-Finity" mic preamps with true-bypass 1176-style compression, including specially tuned "fast" and "slow" settings. Each of the four mic preamp channels allows for continuously variable phase-aligned tone, between a 100% tube and 100% solid state signal path. Send and return jacks are available for external processing or signal access.

The eight analog inputs are digitized via ultra high-quality 24-bit A/D converters at selectable sample rates up to 192kHz. Digital output is available via dual ADAT "lightpipe" or AES/EBU DB-25 connectors, facilitating integration with most popular audio interfaces.

• Note: all specifications are typical performance unless otherwise noted. Unless otherwise noted, all specifications are 20Hz-20kHz, minimum gain, maximum level, 24-bits, all switches in neutral or off mode, 100% solid state, digital output = 0dBFS.

• Gain Range: 56dB
• Min Gain: 14dB
• Max Gain: 70dB
• Max Input Level (bal): 6.7dBu
• Max Output Level (bal): 20dBu
• Input Impedance (bal): 2kÎ
• Input Impedance (Hi-Z): 2.2MÎ
• Output Impedance (bal): 600 Î
• Equiv. Input Noise (150Î, 56dB gain): -127dBu
• Frequency response (20Hz-20kHz): +0.1/-0.15dB
• Crosstalk (max gain, 1kHz): < -115dB
  

• Type: Bessel 2nd Order
• Corner Frequency: 75Hz
• Attenuation (20Hz): -23dB

• Attenuation: 15dB

• Phantom Power Current (per jack): 10 mA
• Voltage: 48V ±1V

• Threshold: 10dBu
• Compression Ratio: 4:1
• Fast Attack Time: 0.3ms
• Fast Release Time: 100ms
• Slow Attack Time: 2.0ms
• Slow Release Time: 1100ms

• Note: all specifications are typical performance unless otherwise noted. Unless otherwise noted, all specifications are 20Hz-20kHz, minimum gain, maximum level, 24-bits, all switches in neutral or off mode, 100% solid state, -1dBFS output.

• THD+N (-1dBFS): -100dB (0.001%)
• SNR (A-Wt): 110dB
• Dynamic Range (-60dBFS, A-wt): 110dB
• Frequency response: +0.1/-0.15dB
• Stereo Phase: <0.3 deg
  

• THD+N (-1dBFS): -103dB (0.0007%)
• SNR (A-Wt): 117dB
• Dynamic Range (-60dBFS, A-Wt): 117dB
• Frequency response: ±0.1dB

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