Appendix C: Technical Info

Specifications

Frequency Response (20 Hz to 20 kHz) :

 

Input Impedance:

 

 

 

 

 

 

Mic input to any output:

+0/–0.5 dB

 

Mic input:

2.4 kΩ balanced

Line/CD input to any output:

+0/–0.5 dB

 

Line/CD input:

20 kΩ balanced

Phono input to any output:

±0.5 dB RIAA EQ curve

 

FX return:

20 kΩ balanced

FireWire output channel 1 or 2 to the

 

 

Phono input:

47.5 kΩ shunted with

FireWire input of the opposite channel:+0/–1 dB

 

 

200 pF

Manual Owner’s

Distortion (THD+N):

Main output, 20 Hz to 20 kHz

Mic Input, –20 dBu in, +30 dB gain, +10 dBu out: Better than 0.007%

Line/CD input at unity gain: Better than 0.015%

Phono input, –30 dBu in, 0 dBu out: Better than 0.020%

FireWire direct out, looped back to same

channel’s FireWire input, unity gain: Better than 0.025% Phones output, 20 Hz to 20 kHz, +4 dBu input signal

Line input @ 0 dB Gain:

Better than 0.015%

Common Mode Rejection Ratio (CMRR):

Mic input, maximum gain, 1 kHz:

Better than 60 dB

Crosstalk (1 kHz, 20 Hz to 20 kHz):

Signal placed on any channel, transform switch disengaged, opposite channel measured at main outs, channels at unity gain:

Better than –70 dBu

Signal placed on any channel, out and in over FireWire, transform switch disengaged, opposite channel measured at main

outs, channels at unity gain: Better than –80 dBu

Noise Characteristics:

Equivalent Input Noise (E.I.N.), 20 Hz to 20 kHz, max gain:

Mic input, 150 Ω source:Better than –125 dBu

Phono input, 500 Ω/500 mH source: Better than 0.3 μV Signal to Noise Ratio:

Main out at unity, 20 Hz to 20 kHz, ref +4 dBu,

all channel gain knobs at minimum: Better than –92 dB Main out at unity, 20 Hz to 20 kHz, ref +4 dBu,

all channel gain knobs at unity:

Better than –88 dB

Main out at unity, 20 Hz to 20 kHz, ref +4 dBu, FireWire inputs selected at both channels and at unity:

Better than –82 dB

Maximum Input Levels (rated at 1% THD):

Mic input, preamp gain at minimum:

+9.5 dBu

Line/CD inputs, preamp gain 0 dB:

+22.5 dBu

Aux input:

+22.5 dBu

Phono input:

185 mV @ 1kHz

Input/Output Characteristics:

Input gain control range:

 

Mic input:

+3 dB to +50 dB,

(+10 dB fixed gain, effective range: +13 dB to +60 dB)

PGM input:

Off to +13 dB

Aux return:

Off to +13 dB

Output gain control range:

 

Main output:

Off to +12 dB

Aux output:

Off to +12 dB

Booth output:

Off to 0 dB

Maximum Output Levels:

XLR main output:

+22.5 dBu

RCA main output:

+22.5 dBu

Booth output:

+22.5 dBu

Aux send:

+22.5 dBu

Phones:

2.94 Vrms into 32Ω

 

(270 mW)

Output Impedance:

Main XLR/RCA output:

150 Ω

Booth output:

150 Ω

Aux send:

150 Ω

Phones:

25 Ω

Equalization

Mic channel

 

Low:

±15 dB @ 80 Hz

Mid:

±15 dB @ 2.5 kHz

High:

±15 dB @ 12 kHz

PGM channel

 

Low:

+10/–inf dB @ 300 Hz

Mid:

+10/–inf dB @ 1 kHz

High:

+10/–inf dB @ 4 kHz

FireWire:

Sample rates available:

44.1 kHz, 48 kHz,

 

88.2 kHz, and 96 kHz

Buffer Size:

Adjustable from 2 ms to

 

20 mS in steps of 1 ms

Resolution:

24-bit

VU Meters

12-segment pre-fader PGM meters

12-segment pre-fader main mix meters

OL (+20), +15, +10, +6, +3, 0, –2, –4, –7, –10, –20, –30 Mic input signal present LED (sensitivity):

 

–20 dBu

Mic input overload LED:

+18 dBu

AC Power Requirements:

Power consumption:

25 watts

Universal AC Power Supply:

100 VAC – 240 VAC,

 

50–60 Hz

 

continued

 

 

 

Owner’s Manual

21