Mic Input Response

Gain range = 0 dB to 60 dB continuously variable
Input impedance = 50 Ohm to 3K3 Ohmcontinuously variable
EIN = 128 dB measured at 60 dB of gain with 150 Ohm terminating impedance and 20 Hz/22 kHz bandpass filter
THD at minimum gain (0 dB) = 0.0004% measured with +16 dBu input signal and with a 20 Hz/22 kHz bandpass filter
THD at maximum gain (60 dB) = 0.003% measured with a 36 dBu input signal and with a 20 Hz/22 kHz bandpass filter
THD at maximum input level (26.5 dBu) = 0.005% measured with a 20 Hz/22 kHz bandpass filter
Frequency response at minimum gain (0 dB) = flat at 10 Hz and 2 dB down at 200 kHz
Frequency response at maximum gain (60 dB) = 2 dB down at 10 Hz and 200 kHz
CMRR at full gain (60 dB) = 80 dB
Line Input Response

Gain range = -10 dB to +10 dB continuously variable
Input impedance = 10K Ohm from 10 Hz to 200 kHz
Noise at main output with gain set to 0 dB = -94 dBu measured with a 20 Hz/22 kHz bandpass filter
Noise at 10 dBV output with gain at 0 dB = -100 dBu measured with a 20 Hz/22 kHz bandpass filter
Signal to noise ratio relative to max headroom (27 dBu) = 121 dB
Signal to noise ratio relative to 0 dBfs (+22 dBu) = 116 dB
THD at unity gain (0 dB) = 0.0006% measured with 0 dBfs (+22 dBu) input signal and with a 20 Hz/22 kHz bandpass filter
Frequency response at unity gain (0 dB) = 0.1 dB down at 10 Hz and 3 dB down at 200 kHz
Instrument Input Response

Gain range (High Gain switch out) = 0 dB to 20dB continuously variable
Gain range (High Gain switch in) = 20 dB to 40dB continuously variable
Input Impedance = > 1 Meg Ohm
Noise at minimum gain (0 dB) = -90 dBu measured with a 20 Hz/22 kHz bandpass filter
Noise at maximum gain (40 dB) = -78 dBu measured with a 20 Hz/22 kHz bandpass filter
THD at minimum gain (0 dB) = 0.006% measured with 10 dBu input signal and with a 20 Hz/22 kHz bandpass filter
Frequency response at unity gain (0 dB) = 0.5 dB down at 10 Hz and 1 dB down at 200 kHz
Frequency response at maximum gain (40 dB) = 6 dB down at 10Hz and 1dB down at 200KHz
Input Meter

6 LED peak reading meter is calibrated relative to 0 dBfs where 0 dBfs = +22 dBu (the maximum level which can be correctly converted by the optional internal A/D converter before overload occurs). The meter calibration points are as follows:
Meter panel calibration value Equivalent dBu value
0dBfs +22dBu (the maximum level the ADC can convert before digital distortion occurs)
-6dBfs +16dBu
-12dBfs +10dBu
-18dBfs +4dBu (the normal signal level in an analogue system to allow headroom for additional processing such as EQ)
-24dBfs -2dBu
-42dBfs -20dBu

Channel Insert

Unbalanced input and output on balanced (TRS) socket as follows:
Tip = Send (Output)
Ring = Return (Input)
Signal level equivalent to 6dB below normal operating level.
High Pass Filter

Roll off = 12 dB per octave 2 pole filter
Cut off frequency:
-3 dB at 120 Hz
-6 dB at 85 Hz
-12 dB at 56 Hz
Optical Compressor

Threshold hold range = -12 dBfs (10 dBu) to 42 dBfs (-20 dBu).
Compressor ratio (Hard Ratio switch out) = 2.5:1
Compressor ratio (Hard Ratio switch in) = 6:1
Attack time (Slow Attack switch out) = 0.5 ms.
Attack time (Slow Attack switch in) = 5 ms.
Release time = 100 ms to 1 s and then auto release mode when the release knob is turned fully clockwise. Auto release creates a release time dependent upon the average level of the incoming signal.
Noise = -94 dBu measured with a 20 Hz/22 kHz bandpass filter.
Makeup gain = 0 to +21 dB.
Compressor Side-Chain Insert

Can be used to input an independent signal to trigger compression or to allow the side-chain audio to be sent in and out of the unit via an external processor, such as an EQ for frequency conscious compression and de-essing of vocals.
Connector is an unbalanced input and output on balanced (TRS) socket as follows:-
Tip = Send (Output)
Ring = Return (Input)
Signal level equivalent to 6 dB below normal operating level.
Mid Scoop EQ

EQ shape = Peak
Center frequency = Variable between 120 Hz and 2 kHz
Cut (Deep switch out) = -6 dB
Cut (Deep switch in) = -12 dB
Q (Deep switch out) = 1.5
Q (Deep switch in) = 3
FX Send

Unbalanced output, signal level equivalent to -6 dB below normal operating level.
Noise = -94 dBu measured with a 20 Hz/22 kHz bandpass filter.
Maximum output signal level = +20 dBu
FX Return

Balanced input
Operating level = +4 dBu
Headphones Mix

Unbalanced output, signal level equivalent to 6 dB below normal operating level.
Noise = -94 dBu measured with a 20 Hz/22 kHz bandpass filter.
Maximum output signal level = +20 dBu
Monitor Input

Balanced input
Operating level = +4 dBu
Monitor Output

Balanced output
Operating level = +4 dBu
Noise = -98 dBu measured with a 20 Hz/22 kHz bandpass filter and monitor level knob at maximum output level (fully clockwise).
Maximum output signal level = +26 dBu
DAC Performance

Playback sample frequency = 32 kHz to 192 kHz.
Maximum bit depth = 24-bit
Maximum analogue output level = +21 dBu.
Dynamic Range = 111 dB measured with A weighted filter.
Wordclock BNC connector outputs a regenerated wordclock at the sample frequency contained within the SPDIF signal connected to the RCA connector.
Output Meter

Calibrated for 0 dBfs = +22 dBu and indicates the level after the output fader being sent to both the internal AD converter and the TwinTrak Pro XLR output.
O/L LED is lit when any section of the unit (including the headphone output) reaches a level greater than 0 dBfs (O/L: LED triggered at +22.4 dBu).

Weight
5 kg

Dimensions
482 mm (W) x 88 mm (H) x 180 mm (D)