Anchor AC-DRIVER User's Guide

AC•DRIVER
TM
Acoustic Instrument Preamp
Radial Engineering Ltd. 1588 Kebet Way, Port Coquitlam BC V3C 5M5
Tel: 604-942-1001 • Fax: 604-942-1010 • Email: info@radialeng.com
Introduction ....................................................................................... 1
Features ........................................................................................ 2-3
Overview........................................................................................... 4
Making Connections ......................................................................... 5
Setting Levels ................................................................................... 6
Low Cut Filter ................................................................................... 7
Fighting Feedback ............................................................................ 8
Notch Filter ....................................................................................... 9
Tuning and Changing Instruments ................................................... 9
Specications ................................................................................. 10
Block Diagram .................................................................................11
Radial Limited Warranty ...................................................Back Cover
Thank you for purchasing the AC-Driver™, an acoustic instrument preamp designed to provide you with complete control over your tone on stage.
While the AC-Driver is designed to be easy to use, we recommend taking a few minutes to review
this short manual to familiarize yourself with the various features available. Should you nd yourself
with any questions not answered within this user guide, please visit www.radialeng.com for a list of
frequently asked questions and answers. If you still nd yourself in need of more information, drop us
a line at info@radialeng.com and we will do our best to respond promptly.
Radial Engineering Ltd. AC-Driver™ User Guide
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FEATURES
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1. InpUT – ¼” jack used to connect your instrument to the AC-Driver.
2. LEvEL – Controls the output level of both the XLR and the ¼” outputs.
3. noTch – Sets the center frequency for the notch filter. Used to eliminate feedback.
4. noTch Q – 3-position switch bypasses the notch filter or selects between a normal or extra-deep notch. Works in conjunction with the notch frequency control.
5. 180° phASE REvERSE – Used to reduce on-stage feedback by reversing the polarity of the XLR output.
6. Low cUT – Variable filter rolls off excessive low frequencies and controls bass resonance.
7. oUTpUT – ¼” post-eq output used to feed an on-stage amplifier.
8. MUTE SwITch And LEd – Footswitch turns off all outputs except the tuner out. Used for quiet on-stage tuning.
Radial Engineering Ltd. AC-Driver™ User Guide
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FEATURES
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9. TUnER – Always-on buffered output is used with the mute footswitch for quiet on-stage tuning.
10. BALAncEd oUTpUT – XLR line level output connects directly to a powered PA speaker or console.
11. LIFT – Ground lift switch disconnects pin-1 at the XLR output to remove buzz and hum.
12. 9vdc – Connection for 9-12 volt DC (center pin negative) power supply.
13. 14-GAUGE STEEL – I-Beam construction prevents the circuit board from being torqued which could lead to part failure.
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14. connEcToRS – Glass-lled nylon
XLR connector with large nickel­silver pin contacts. Tougher than steel.
15. cIRcUIT BoARd – Double-sided military spec for greater durability and full ground plane to reduce radio frequency interference.
Radial Engineering Ltd. AC-Driver™ User Guide
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