Auxiliary Sends
The Channel path has three auxs. FB1 is prefader for foldback mixes, while auxs 1 and 2 may be used as post-fader effects sends.
Channel Routing
The channel signal can be routed to the stereo mix or to the eight groups as stereo pairs, and can be isolated for PFL moni-toring. The on switch activates the Channel path: this facility can be automated on Spirit Auto.
Long Throw Fader
The 100mm long-throw fader gives you smooth precise control, with up to 10dB gain over normal level. Spirit Auto's channel faders have Voltage Controlled Amplifiers (VCAs) which allow fader movements to be recorded and edited in sequencer or dedicated software.
Monitor Path
The Monitor path normally receives signals from the Tape Return. The Tape Trim provides gain control from -10 to +20dB while the Pan control alters the position of the monitor signal in the stereo image. The PFL switch isolates the signal for monitoring, with the switch's LED also warning of potential overload.
There are three sends: FB2 is pre-fader, for headphone mixes. AUXs 3 and 4 are post fader and feed external effects processors; they can be switched into the Channel path for additional effects sends.
Group Section The eight bus group section is ideal for mixdown subgrouping or sending sub-mixed groups of instruments to individual tape tracks.
Outputs
Each group has an output jack, with an insert point for signal processors.
Metering
A 16 segment, three colour bargraph meter displays each group's output level.
Auxiliary Masters
Rotary faders provide master level control of the four post-fader auxiliary outputs. All the aux masters have AFL monitoring.
Effects Returns
There are four stereo effects returns, each with two band shelving EQ, and two foldback sends. A Trim control boosts gain for each return, and a Pan control determines the return's stereo position. The return can be routed to the mix bus or to the pair of groups below it.
Group Routing
Mix routes odd and even pairs of groups to the stereo mix. Pressing Mono feeds them equally to both sides of the mix.
Group Faders
A 100mm fader has unity gain at the top of its travel. Each group has PFL monitoring.
Master Section This provides final control of the Mix outputs, along with monitoring and talkback facilities.
Metering
Two 16 segment, three colour bargraph meters monitor Mix L and R outputs for accurate control. Pressing PFL or AFL deactivates the left meter, with the right meter displaying the PFL/AFL level.
Oscillator
The dual frequency oscillator is switchable between 1kHz and 10kHz. Its signal can be routed to the eight groups and the stereo mix bus, allowing you to line up multitracks.
Foldback Masters
Rotary faders drive the FB1 and FB2 outputs, and a link switch allows a combined headphone mix from both paths. The Control Room source, or Two-Track replay, can also be used as a headphone mix by routing it to either of the foldback buses.
Two Track Replay
The Two Track inputs allow you to play the output of a mastering device such as a DAT or 2-track tape machine.
PFL/AFL Trim
A rotary control provides level adjustment on PFL and AFL signals. A LED illuminates when any PFL/AFL is selected.
Control Room and Phones Levels
Both levels are adjusted with a rotary fader. The Mono switch sums left and right signals for phase checking.
Talkback
The internal talkback mic's signal can be routed to the Groups and the stereo mix, or to the foldback outputs.
Mix Fader
A 100mm long-throw fader controls mix output levels, with unity gain at the top of its travel.
Specifications Typical figures, measured RMS, 22Hz - 22kHz Bandwidth Studio
Noise
Line Inputs, unity gain, 150R
Output Noise (Masters down)
Mix Left & Mix Right -98dBu
Group -98dBu
Mix Noise -80dBu
EIN Microphone Input, max gain, 150R -129dBu
CMRR (measured at 1kHz)
Microphone Input, max gain -90dB
Line Input, unity gain -55dB
Distortion (THD 1kHz at +20dBu, 20Hz to 20kHz bandwidth)
Line In to Mix or Group Out <0.006%
Crosstalk (measured 1kHz sine wave)
Routing Isolation, Mix L/R & Group >100dB
Max Channel Fader Attenuation >86dB
Max Aux Send Attenuation >86dB
Channel Pan to Group Isolation >76dB
Channel & Monitor "On" Switch Isolation >100dB
FX Return to Mix >100dB
FX Return to Group >85dB
Frequency Response (measured 20Hz to 20kHz, rel. 1kHz)
Mix L/R, Group & Aux Outputs ±0.5dB
Input & Output Impedances
Microphone Input 2k
Line Input 10k
Insert Sends 75
Insert Returns 10k
Outputs 75
Input & Output Levels
Microphone Input max. level +10dBu
Line Input max. level +30dBu
Mix, Group & Aux Out max. levels +21dBu
Dimensions
(H x W x D from armrest to rear panel, mm)
16 Channel 88 x 894 x 771.5
24 Channel 88 x 1174 x 771.5
32 Channel 88 x 1454 x 771.5
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