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GTM 822 Handbook

Congratulations on your purchase of a GTM 822 console. I feel confident that you 
will find that its many features and great “vintage” sound will help you to make 
great mixes and recordings. 

Please read through this handbook first to familiarize yourself with the controls 
and optimal operating procedures.

1. Connecting the unit to your power source

The GTM has a remote linear power supply set at 120v. If  it is to be used on 
240v, select this value on the switch on the power supply rear panel. 
The ”power on” switch is also mounted on the power supply. It does the unit no 
harm to be left on continuously, in much the same fashion as a vintage Neve

tm 

console. The VU and phase meters will light up when the unit is powered on. 

2. Connecting the unit to your equipment

There are two sets of channel inputs to the unit…

a) The Channel XLR input connectors and
b) The 25 pin “D” style female connector

On each channel and on the monitor section is an illuminated blue push button 
marked “TRACK”. When this switch is selected, the channels will be sourced 
from the Channel XLR’s and it’s anticipated that these will be used with 
microphone pre amplifiers and other sources used for the “tracking” mode of 
recording, sending to the DAW/MT tape m/c via the channel output XLR’s or the 
25 pin “D” output connector. Channels can be switched individually or globally.

If the “TRACK” switch is deselected then the channels are in default mix mode 
and receive their input signals from the 25 pin “D” connector.

These D connectors are wired to standard workstation practice 

(see addendum 

sheet #1)

 and are anticipated to be connected to a digital workstation or multi-

track recording system. 

This represents the “mix” mode of recording where multiple channels are 
mixed down to stereo. In both modes the mix and cue/aux busses are accessible 
and can be used to send signals to effects paths or cue headphones.

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Содержание Absolute GTM822

Страница 1: ...t connectors and b The 25 pin D style female connector On each channel and on the monitor section is an illuminated blue push button marked TRACK When this switch is selected the channels will be sour...

Страница 2: ...8 channel add on units It was always a feature of the design concepts of the GTM that it should be easy to use and provide comprehensive information about the signal The channel has a stepped gain co...

Страница 3: ...nel signal can be positioned anywhere between full left and full right pan The Cue Aux bus sends are pre fade and not affected by the pan pot In the event that the busses are used as an effects send t...

Страница 4: ...the ALT LS switch toggles between the two outputs A monitor CUT switch is also provided and also a Mono monitor switch that puts the entire monitor Monitor Speakers Meters and Headphones into mono mod...

Страница 5: ...ts The power available increases up to 0 75 watts at 22 ohms but then diminishes to around 0 65 watt with consumer 8 ohm headphones and down to 0 no output at a zero ohm short circuit Even around 0 1...

Страница 6: ...gh gain pre amplifiers that square the input signal and drive a sum and difference network Individual output amplifiers buffer the two mixes and propel the center zero needle to left or right of cente...

Страница 7: ...put fader pair The channel faders have 10dB level in hand while the output faders have 0dB Channel fader knobs are white and the output fader knobs are red The remote fader cable assembly plugs into t...

Страница 8: ...GTM has ventilation slots across the entire width of the top and bottom panels at the rear of the unit This is to provide a good cooling airflow to the amplifiers all of which are located at the rear...

Страница 9: ...effect is especially noticeable in buildings that are shared with other businesses occupants and the studio equipment is located close to the main power cable into the building If other studio device...

Страница 10: ...e 0dB mark on the rotary fader or the 0dB point on the remote linear fader The trim pot has around 1 5dB level in hand for gain and as much as 6dB loss available The adjustment should always be as clo...

Страница 11: ...e used as Cue headphone sends or as Effects sends that return to the mix busses by the Stereo Effects return path An option built into the GTM is a talkback system to the cue headphone sends and a num...

Страница 12: ...eturn can be used as Channel inputs 9 and 10 to the stereo bus If for instance a colleague brings a CD or MP3 player and wishes to hear it though the studio monitor loudspeakers the device can be plug...

Страница 13: ...reamplifiers can be sent to the digital editing system In MIX mode the digital editing system can mix down to stereo The two Aux send busses can be used as either Cue Headphones or a Stereo Effects pa...

Страница 14: ...The wiring of the mating female D sub viewed from the wiring side is shown in the illustration Any type of microphone can be used as the amplifier provides phantom power and has a built in compressor...

Страница 15: ...thout fully securing the connector Addendum 3 Connecting to unbalanced devices All audio paths entering or exiting the GTM822 except the monitor headphone jacks are balanced Balanced circuitry is used...

Страница 16: ...in 1 Leave pin 3 disconnected TRS outputs Monitor and stereo O P Connect the signal s hot to tip and the shield to ring Leave the sleeve disconnected All other outputs Connect the signal s hot to tip...

Страница 17: ...e unity gain Monitor outputs are unity gain Headphone output amplifiers have 20dB gain but the level produced in the headset depends on their impedance Output Impedance 75 ohms balanced except headpho...

Страница 18: ...age fire damage improper maintenance dropping the unit and operation or storage outside the environmental specification for the product Do not try to repair this GTQM822 Only qualified Aurora Audio In...

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