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 ratio, 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)
Maximum Level
Mic Preamp Input
All Other Inputs (except inserts)
Balanced Outputs
All other outputs
Impedance
Mic Preamp Input
All Other Input (except insert)
RCA 2T Output
All other outputs
Equalization
Low EQ
Mid EQ
Hi EQ
Low cut filter
Power and Physical Attributes
Built-in Switching Power Supply
Net Weight
Dimensions (WxHxD)
Helix Board 24 Universal
+0/-1 dB
+0/-3 dB
<-90 dB
-86.5 dBu
-84 dBu
>90 dB
<-129.5 dBm
<0.005%
80dB
+10dBu
+22dBu
+28dBu
+22dBu
2 K ohms
10 K ohms
1.1 K ohms
100 ohms
3-band, +/-15dB
80Hz
100-8k Hz, sweepable
12 kHz
75 Hz (-18 dB/oct)
100-240 VAC, 50/60 Hz
9.8 kg (21.6 lbs)
445 x 212 x 432 mm (17.5" x 8.3" x 17")
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