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Universal Audio 4-710d Twin-Finity 4-Channel Mic Preamp (with 1176 Dynamics and A/D Conversion)

 
  • Dale #:

    UNAU-4710D
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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 cir... Read More

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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 kΩ
Input Impedance (Hi-Z) 2.2MΩ
Output Impedance (bal) 600 Ω
Output Impedance (unbal) 300 Ω
Equiv. Input Noise (150Ω, 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 kΩ
Input Impedance (unbal) 5 kΩ
Output Impedance (bal) 600 Ω
Output Impedance (unbal) 300 Ω
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 75Ω (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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