Acoustic Pre Twin Channel
Using your Acoustic Pre Twin Channel
Front Panel Features

Switches
ACTIVATES 48V PHANTOM POWER ON CHANNEL B’S XLR INPUT
Activate +48V phantom power when using a condenser microphone (Check Manufacturer specifcations)
Channel A
Treble
Adjusts the high shelf +18dB above 680 hZ
Bass
Adjusts the low shelf +/- 12dB below 680 hZ
Gain
Adjusts the input level to Channel A.
Middle
Adjusts the frequency selected by the Freq control by +/- 18 dB
Freq
Selects the centre frequency for the mid control (180Hz – 1.8kHz)
Heat
Alters the level of valve gain in the upper frequencies adding harmonics and compression
Channel B
Middle
Adjusts the frequency selected by the Freq control by +/- 18 dB
Bass
Adjusts the low shelf +/- 12dB below 680 hZ
Treble
Adjusts the high shelf +18dB above 680 hZ
Gain
Adjusts the input level to Channel B
Freq
Selects the centre frequency for the mid control (180Hz – 1.8kHz)
Master
Reverb
Controls the level of the on-board digital reverb.
Line Volume
Controls the output level of the unbalanced mono line output.
Main Volume
Controls the output level of the balanced XLR outputs.
Rear Panel Features

Input A
Input B
Mute Footswitch
FX Loop Send A
FX Loop Return A
FX Loop Send B
FX Loop Return B
Line output
Main Output A
Main Output B
12V DC
1. Input A
1/4″ Jack input to Channel A
2. Input B
1/4″ Jack and XLR inputs to Channel B (not to be used simultaneously)
3. Mute Footswitch
Allows the mute function to be controlled by a latching footswitch (such as the FS-1)
4. FX Loop Send A
Connects Channel A to the input of an effects unit
5. FX Loop Return A
Connects the output of an effects unit to Channel A output
6. FX Loop Send B
Connects Channel B to the input of an effects unit
7. FX Loop Return B
Connects the output of an effects unit to Channel B output
8. Line output
Mixes both channels for a mono unbalanced 1/4″ output Jack
9. Main Output A
Individual balanced XLR output for Channel A
10. Main Output B
Individual balanced XLR output for Channel B
11. 12V DC
2.1mm DC Jack for connecting the supplied 12VDC centre negative power supply
Specifications
Channel A Input Impedance | 2.2 MΩ |
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Channel B XLR Input Impedance | Minimum 6 KΩ |
Channel B Jack Input Impedance | 2.2 MΩ |
FX Send Level | -10dBu |
FX Send Impedance | Less than 150 Ω |
FX Return Level | -10dBu |
FX Return Impedance | 10 KΩ |
Line Output Level | -10dBu |
Line Output Impedance | Less than 150 Ω |
Main Output Level | .+4dBu |
Main Output Impedance | Less than 60 Ω |
Power Supply | 12 VDC Centre Negative |
Current Draw | 750 milliamps |
Dimensions | 29x15x9cm |
Weight | 2.5Kg |
Fuses & Valves
VALVE | 1 x ECC83/12AX7 |
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GLOBAL FUSE | T1A H |
HT FUSE | T63 milliamps |