Acoustic musicians need to have accurate, uncoloured amplified sound both to the front of house PA system and for on stage monitoring. The multi-purpose Acoustic Interface combines a 2 channel preamp, DI buffers, digital effects processor and a studio quality power amplifier and loudspeaker system for all acoustic instruments. Use as a stand alone amplifier, a preamp with numerous routing options to DI into a PA system, a personal on-stage monitor - or any combination of these.

   The two separate input channels allow the connection of active pickups, passive pickups and microphone sources either singly or as a "stereo" input with a Blend control to allow mixing the sound of the different transducers. Each input is equipped with "application specific" EQ tailored to the type of source, and a separate DI output to allow a different mix front-of-house from the internal loudspeaker if desired. The monitor amp section has twin notch filters for feedback suppression and a separate volume control for the internal amplifier/loudspeaker that doesn't affect the DI outputs. Loudspeaker complement is a high efficiency 210mm woofer + 28mm horn loaded dome tweeter driven through an active crossover system by separate 120W + 40W power amplifiers giving clean, undistorted output at high volumes. The unit is housed in a rugged dual position 15mm birch ply cabinet and is small enough to be easily portable.

   Designed and built to an uncompromising specification to give, what we believe, is the very best sound quality currently available.

Front Panel

STEREO INPUT - For dual transducers using stereo lead
INPUT 1 PICKUP - Channel input
ACTIVE LEAD POWER - Switch to activate power for optional active lead. For pickups without pre-amps
GAIN - Set input gain and DI output level in conjunction with input level meter
LOW MID - SWEEP, PRESENCE, HIGH - EQ controls optimised for pickup sources
MODE - Select pickup type/playing style to fine tune EQ response

REVERB
SELECT - Scrolls through programs
MIX - Controls level of effects

INPUT 2 MIC - Channel input
MIC POWER - Power for electret condenser mics using front panel input or 48v phantom power using LOW-Z mic input on rear
PHASE REV - Channel 2 phase reverse
GAIN - Sets input gain and DI output level in conjuction with input level meter
LOW, MID-SWEEP, HIGH - EQ controls optimised for mic scources

AMP/MONITOR
BLEND - Sets Ch1/Ch2 (pickup/mic) mix
NOTCH LOW, NOTCH HIGH - Notch filters for feedback suppression
MUTE/TUNE - mutes signal for use with tuner / headphones
VOLUME - Sets level to internal loudspeaker, does not affect DI outputs

Rear Panel

PHONES - Use with mute switch for silent practice
FOOT SWITCH - 8dB boost for solo /mute for tuning
TUNE OUTPUT - Leave your tuner connected for quick checks during performance
SLAVE OUTPUT - Feed into another amp or active speaker/monitor
AUX INPUT - Can be used to bring an additional mix into monitor from PA, CD playback for practicing etc.

CHANNEL 1 PICKUP
DI OUTPUT - To connect to PA system. Normally pre EQ
POST EQ - DI output sourced after EQ
MIX LEFT - DI output sourced from mix of Ch1/Ch2 after EQ+ stereo effects L channel
INSERT SEND / RETURN - To connect outboard effects processors

CHANNEL 2 MIC
DI OUTPUT - To connect to PA system. Normally pre EQ
POST EQ - DI output scourced after EQ
MIX RIGHT - DI output sourced from mix of Ch1/Ch2 after EQ+ stereo effects R channel
MIC INPUT (LOW Z) - Connect a dynamic or condenser mic. 48v phantom power available using mic power switch

Dimensions: W35cm x H33cm x D29cm Weight 13 Kg
Patents pending. Note: All specifications subject to change

Contact
The Old School, Strontian, Acharacle, Argyll, PH36 4JA, Scotland
Telephone / Fax +44(0)1967 402114