SPECIFICATIONS
Inputs
Total channels
Balanced Mono Mic/Line channel
Balanced Stereo Line Channel
Aux return
2T input
Outputs
Main L/R stereo
ALT 3-4
Rec out with trim control
CTRL RM L/R
Phones
FireWire Interface
Channel Strips
Insert Points
Aux send
Pan/Balance control
Volume Controls
Master Section
Stereo aux returns
Effects return to monitor
Control room/Phones Level Control
Faders
Metering
Number of channels
Segments
Phantom Power Supply
Switches
Effect processor
Frequency Response (Mic input to any output)
20Hz ~ 60KHz
20Hz ~ 100KHz
Crosstalk (1KHz @ 0dBu, 20Hz to 20KHz bandwidth, channel in to main L/R outputs)
Channel fader down, other channels at unity
Noise (20Hz~20KHz; measured at main output, Channels 1-4 unit gain; EQ flat; all channels on main mix;
channels 1/3 as far left as possible, channels 2/4 as far right as possible. Reference=+6dBu)
Master @ unity, channel fader down
Master @ unity, channel fader @ unity
S/N ration, ref to +4
Microphone Preamp E.I.N.
(150 ohms terminated, max gain)
THD (Any output, 1KHz @ +14dBu, 20Hz to 20KHz,
channel inputs)
CMRR (1 KHz @ -60dBu, Gain at maximum)
18
6
4
2
2 stereo
Stereo RCA
2 x 1/4" TRS, Bal.
2 x 1/4" TRS, Bal.
Stereo RCA
2 x 1/4" TS
1
10 in & 2 out, 24-bit / 96 kHz
6
2
2
Yes
Rotary
2
1
Yes
Main L/R, 60mm fader
2
8
+48VDC
Master
100 programs plus tap delay; foot switch
(effect on/off, tap)
+0/-1 dB
+0/-3 dB
<-90 dB
-86.5 dBu
-84 dBu
>90 dB
<-129.5 dBm
<0.005%
80 dB
HELIX BOARD 12 FIREWIRE MKII