Acoustic Pre Twin Channel Preamp

Acoustic Pre Twin Channel Preamp Specifications:

• Gain: Input level to Channel A
• Heat: Varies valve gain in upper frequencies adding harmonics and compression
• Bass: Low shelf +/-12 dB below 680 hZ
• Treble: High shelf +15 dB Above 680 hZ
• Mid: +/-18dB @ frequency selected by Freq control
• Freq: Selects centre frequency for Mid control (180Hz – 1.8kHz)

• Gain: Input level to Channel B
• Bass: Low shelf +/-12 dB below 680 hZ
• Treble: High shelf +15 dB Above 680 hZ
• Mid: +/-18dB @ frequency selected by Freq control
• Freq: Selects centre frequency for Mid control (180Hz – 1.8kHz)

• 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

• +48V On: Activates 48V phantom power on Channel B’s XLR input
• Phase Inv A: Inverts the phase of Channel A
• Phase Inv B: Inverts the phase of Channel B
• Mute: Mutes both channels at the FX Loop send (Reverb/Delay tails and loop pedals will still be audible)
• Gnd Lift A: Lifts the ground of Channel A’s XLR output
• Gnd Lift B: Lifts the ground of Channel B’s XLR output XLR

• Input A: 1/4″ Jack input to Channel A
• Input B: 1/4″ Jack and XLR inputs to Channel B (not to be used simultaneously)
• Mute Footswitch: Allows the mute function to be controlled by a latching footswitch (such as the FS-1)
• FX Loop Send A: Connects Channel A to the input of an effects unit. The Send can also be used as an unbalanced output for Channel A (post-EQ, pre-Reverb).
• FX Loop Return A: Connects the output of an effects unit to Channel A output
• FX Loop Send B: Connects Channel B to the input of an effects unit. The Send can also be used as an unbalanced output for Channel B (post-EQ, pre-Reverb).
• FX Loop Return B: Connects the output of an effects unit to Channel B output
• Line Output: Mixes both channels for a mono unbalanced 1/4″ output Jack
• Main Output A: Individual balanced XLR output for Channel A
• Main Output B: Individual balanced XLR output for Channel B
• 12V DC 2.1mm DC socket for connecting the supplied 12VDC centre negative power supply
• Channel A input impedance: 2.2 Mohms
• Channel B XLR input impedance minimum: 6 Kohms
• Channel B jack input impedance: 2.2 Mohms
• FX send level: -10dBU
• FX send impedance sub: 150 ohms
• FX return level: -10dBU
• FX return impedance: 10 Kohms
• Line output level: -10dBU
• Line output impedance sub: 150 ohms
• Main output level: +4dBU
• Main output impedance sub: 60 ohms
• Dimensions: 11.41" x 5.9" x 3.54" (29 x 15 x 9 cm)
• Weight: 5.51 lb. (2.5 kg)