Universal Audio 4-710d Twin-Finity 4-Channel Mic Preamp (with 1176 Dynamics and A/D Conversion)
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Retail Price: $2,499.00 Our Price: $1,999.00
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Description
The Universal Audio 4-710d is a boutique quality, four-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 multi-channel preamp offers selectable 1176-style compression circuitry on each channel, plus four additional line inputs feeding eight 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.
Features:
- Four TEC Award-winning 710 Twin-Finity™ microphone/line preamps, each featuring:
- Phase-aligned tone-blending of tube and solid state circuits, creamy to crunchy
- Newly designed 1176-style compression circuit per preamp channel
- Backed by 1-Year limited warranty
Preamplifiers
- Four TEC Award-winning 710 Twin-Finity™ microphone/line preamps, each featuring:
- Dual-path 285-volt Class-A tube and transimpedance solid-state preamps
- Phase-aligned tone-blending of tube and solid state circuits, creamy to crunchy
- Newly designed 1176-style compression circuit per preamp channel
- JFET Direct Input with 2.2M ohm ultra Hi-Z impedance w/auto input override
- Large backlit VU meters for flexible metering of input drive, gain level, and gain reduction
- Balanced send/return inserts (half-normalled)
- 48V phantom power
- 75 Hz low cut filter
- Polarity switch
- Monolithic balanced output stage
Analog-to-Digital Conversion
- Eight channels of high quality 24-bit A/D conversion:
- Selectable sample rates up to 192 kHz
- Digital output via dual ADAT optical and AES/EBU DB-25 connectors
- 8-channel soft limiter (switchable for all channels)
- Ultra-low jitter clock subsystem
- LED metering array with clip/hold indicators
- 75 ohm BNC work clock I/O
- Digital outputs anti-pop protection on power-up
Other
- Universal voltage internal power supply
- Heavy-duty metal construction, two-space rack unit
- One year warranty including parts and labor
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Product Specs
| Analog Section, Channels 1-4 | |
| MICROPHONE PREAMPLIFIER TO LINE OUT | |
| Gain Range | 56 dB |
| Min Gain | 14 dB |
| Max Gain | 70 dB |
| Max Input Level (bal) | 6.7 dBu |
| Max Output Level (bal) | 20 dBu |
| Max Output Level (unbal) | 14 dBu |
| Input Impedance (bal) | 2 k? |
| Input Impedance (Hi-Z) | 2.2M? |
| Output Impedance (bal) | 600 ? |
| Output Impedance (unbal) | 300 ? |
| Equiv. Input Noise (150?, 56 dB gain) | -127 dBu |
| Frequency Response (20Hz-20kHz) | +0.1/-0.15 dB |
| Phase (Mic In to Line Out, 20 kHz) | < 0.5 deg |
| Stereo Phase Mismatch | < 0.6 deg |
| Stereo Level Balance (1 kHz) | < 0.01 dB |
| Crosstalk (max gain, 1kHz) | < -115 dB |
| Common Mode Rejection Ratio (max gain, 60 Hz) | > 62 dB |
| LINE IN TO LINE OUT | |
| Gain Range | 56 dB |
| Min Gain | -7 dB |
| Max Gain | 49 dB |
| Max Input Level (bal) | 26 dBu |
| Max Input Level (unbal) | 20 dBu |
| Max Output Level (bal) | 20 dBu |
| Input Impedance (bal) | 10 k? |
| Input Impedance (unbal) | 5 k? |
| Output Impedance (bal) | 600 ? |
| Output Impedance (unbal) | 300 ? |
| Frequency Response (20Hz-20kHz) | +0.1 / -0.15 dB |
| Phase (Line In to Line Out, 20 kHz) | < 0.5 deg |
| Stereo Phase Mismatch | < 0.5 deg |
| Stereo Level Balance (1 kHz) | < 0.2 dB |
| Crosstalk (max gain, 1kHz) | < -115 dB |
| Common Mode Rejection Ratio (max gain, 60 Hz) | > 70 db |
| Tube @ 100% – LINE IN TO LINE OUT | |
| Tube Complement | 12AX7 (2) |
| THD+N (19 dBu, 1 kHz, 20 kHz BW) | -30 dB (3.1%) |
| THD+N (17 dBu, 1 kHz, 20 kHz BW) | -20 dB (1.0%) |
| SNR (min gain, 1 kHz, A-wgt, 20 kHz BW) | 109 dB |
| SNR (max gain, 1 kHz, A-wgt, 20 kHz BW) | 74 dB |
| Solid State @ 100% – LINE IN TO LINE OUT | |
| THD+N (min gain, 1 kHz, 20 kHz BW) | -101 dB (0.0009%) |
| THD+N (max gain, 1 kHz, 20 kHz BW) | -70 dB (0.03%) |
| SNR (min gain, 1 kHz, A-wgt, 20 kHz BW) | 110 dB |
| SNR (max gain, 1 kHz, A-wgt, 20 kHz BW) | 82 dB |
| Low Cut Filter | Type Bessel 2nd Order Corner Frequency 75 Hz Attenuation (20 Hz) -23 dB |
| Pad | Attenuation 15 dB |
| Phase | Phase Shift 180 deg |
| Phantom Power | Phantom Power Current (per jack) 10 mA Voltage 48V ± 1V |
| Compressor | Threshold 10 dBu Compression Ratio 4:1 Fast Attack Time 0.3 ms Fast Release Time 100 ms Slow Attack Time 2.0 ms Slow Release Time 1100 ms |
| Limiter | Threshold 17 dBu (= -3 dBFS) Attack Time 0.075 ms Release Time 100 ms |
| Send/Return | Send Level, Max (bal) 20 dBu Return Level, Max (bal) 20 dBu Send Level, Max (unbal) 14 dBu Return Level, Max (unbal) 20 dBu |
| Analog Meter | Switch, GR Comp. Gain Reduction Switch, Drive Tube Stage Drive Switch, Level Output Level Level, 0 dB VU, Drive Mode 12 dBu Level, 0 dB VU, Output Mode 4 dBu |
| Analog-To-Digital Converter Section | |
| Note | All specifications are typical performance unless otherwise noted. Unless otherwise noted, all specifications are 20 Hz-20 kHz, minimum gain, maximum level, 24 bits, all switches in neutral or off mode, 100% solid state, -1 dBFS output. |
| Microphone Input | |
| THD+N (-1 dBFS) | -100 dB (0.001%) |
| SNR (A-Wt) | 110 dB |
| Dynamic Range (-60 dBFS, A-wt) | 110 dB |
| Frequency Response | +0.1/-0.15 dB |
| Stereo Phase | < 0.3 deg |
| Line Input (Ch 1-4) | |
| THD+N (-1 dBFS) | -100 dB (0.001%) |
| SNR (A-Wt) | 110 dB |
| Dynamic Range (-60 dBFS, A-Wt) | 110 dB |
| Frequency Response | +0.1/-0.15 dB |
| Stereo Phase | < 0.3 deg |
| Line Input (Ch 5-8) | |
| THD+N (-1 dBFS) | -103 dB (0.0007%) |
| SNR (A-Wt) | 117 dB |
| Dynamic Range (-60 dBFS, A-Wt) | 117 dB |
| Frequency Response | ±0.1 dB |
| Stereo Phase | < 0.5 deg |
| 16-Bit Mode | |
| Dither Type | Triangular |
| Sample Resolution | 16 bits |
| THD+N (-1 dBFS, 16 bits) | -93 dB (0.0022%) |
| SNR (A-Wt) | 98 dB |
| Dynamic Range (-60 dBFS, A-Wt) | 98 dB |
| Digital Output Section | |
| Digital Output Formats | AES/EBU 8 channels, 44.1-192kHz, single wire ADAT Optical 44.1-48kHz: Port 1 = channel 1-8 Port 2 = channel 1-8 (duplicate out) 88.2-96Khz (S/MUX™): Port 1 = channel 1-4 Port 2 = channel 5-8 176.4-192kHz (S/MUX™): Port 1 = channel 1-2 Port 2 = channel 3-4 |
| Bit Depths | 24-Bit 16-Bit (dithered) |
| Clock Options | Internal (crystal) 44.1, 48, 88.2, 96, 176.4, 192 kHz Word Clock 44.1, 48, 88.2, 96, 176.4, 192 kHz Lock range ±3% Optional termination (75 ohms) |
| A/D Metering | Bottom segment: Green, -37 dB to -6 dB Top segment: Yellow, -6 dB to -1 dB Top segment: Red, -1 dB to Clip |
| Connector Types | |
| External Connections (rear panel) | 8 x XLR Female Line in, Mic in (channel 1-4) 4 x XLR Male Line out (channel 1-4) 12 x ¼” TRS Female (ch 1-4 send, return, line in 5-8) 2 x Toslink out (ADAT Optical output 1-8) 2 x BNC 75? (Word Clock in, out) 1 x DB-25 (AES/EBU Tascam pin-out, ch 1-8) |
| External Connections (front panel) | 4 x ¼” TRS Female (channel 1-4 Hi-Z in) |
| Mechanical and Power | |
| AC Requirements | 100VAC - 240VAC, 50/60 Hz, auto-switching |
| Maximum Power Consumption | 0.525 A @ 120 VAC (60W) |
| Power Connector | Detachable IEC power cable |
| Dimensions | 2U Rack 19” x 3.5” x 12” (W x H x D) inches 48.2 x 8.9 x 30.5 (W x H x D) cm |
| Weight | 11.5 lbs (5.2 kg) |
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