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page 23
PHONIC CORPORATION Helix Board 18 FireWire User's Manual
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. Ref6dBu)
Master @ unity, channel fader down
-86.5 dBu
Master @ unity, channel fader @ unity
-84 dBu
S/N ratio, ref to +4
>90 dB
Microphone Preamp E.I.N.
(150 ohms terminated,
max gain)
<-129.5 dBm
THD
(Any output, 1KHz @ +14dBu, 20Hz to 20KHz,
channel inputs)
<0.005%
CMRR
(1 KHz @ -60dBu, Gain at maximum)
80dB
Maximum Level
Mic Preamp Input
+10 dBu
All Other Input
+22 dBu
Balanced Output
+28 dBu
Impedance
Mic Preamp Input
2 K ohms
All Other Input (except insert)
10 K ohms
RCA 2T Output
1.1 K ohms
All other outputs
200 ohms
Equalization
3-band, +/-15 dB
Low EQ
80 Hz
Mid EQ (mono channel)
100-8k Hz, sweepable
LMid EQ (stereo channel)
800 Hz
HMid EQ (stereo channel)
3 kHz
Hi EQ
12 kHz
Low cut filter
75 Hz (-18 dB/oct)
Built-in Power Supply
100-240 VAC, 50/60 Hz
Weight
11.2 lbs (5.1 kg)
Dimensions
(WxHxD)
16” x 3.5” x 14” (407 x 89 x 357 mm)