D19 MicVALVE
E1/6 Come in! Date printed: 9.2.2000
1.4 Technical Specifications (Subject to Change without Notice)
A/D converter: Delta-Sigma, 64 × oversampling, resolution 20 bit, linear (modular).
Analog inputs: 2 separate Mic and Line inputs on XLRs, transformer-balanced and float-
ing.
2 stepped attenuators and 2 potentiometers for MIC/LINE Gain setting.
Functions selectable per channel: Phase, Phantom (Mic input only), High-
pass filter (–3 dB @ 75 Hz, 12 dB/oct.; Mic input only).
2 switchable Insert Return inputs (XLR), electronically balanced; input level
fixed.
Analog outputs: 2 Line outputs (XLR), electronically balanced. Output level adjustable.
2 separate Insert Send outputs (XLR), electronically balanced; output level
fixed.
Metering: PPM, peak program meter with switchable Peak Hold function;
16-segment bargraph displays, range –60 dBFS...Overload.
Digital audio processing: DC reject (always on)
Output word length 20 bit, 16 bit with Dithering or 16 bit with Noise
Shaping.
1.4.1 Audio Specifications
Conditions: all measurements without valve stage, at f
s
= 48 kHz
Insert OFF, unless otherwise noted
20 Hz...20 kHz, unless otherwise noted.
Analog – Digital:
Line inputs: Conditions: Gain = 24 dBu
FS
, without Super ADC option
Frequency response: ±0.1 dB
Signal/noise ratio: > 106 dBFS, CCIR 468-3
THD + Noise: < –80 dB
FS
, @ –1 dB
FS
< –104 dB
FS
, @ –30 dB
FS
< –103 dB
FS
, @ –30 dB
FS
, looped via Insert
CMRR: > 50 dB
Crosstalk: < –100 dB @ 15 kHz, Fine Gain min.
Sensitivity: –1...+24 dBu for Full Scale
Microphone inputs: Conditions: Gain = 20 dBu
FS
Frequency response: ±0.4 dB
Noise figure: < 3.5 typ. @ max. gain, 20 Hz...20 kHz, 24°C
CMRR: > 60 dB
Crosstalk: < –100 dB @ 15 kHz, Fine Gain min., Gain = 20 dBu
FS
Sensitivity: –55...+20 dBu for Full Scale
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