Analog Section, Channels 1–4
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, digital output = 0 dBFS.

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
Digital Output Formats
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
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
Mechanical
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)