Radial Engineering Firefly User Manual page 4

True to the Music
REAR PANEL FEATURE SET
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10. 180º POLARITY: Inverts the signal polarity by fl ipping pins-2 and pin-3 on the XLR
output. Used to reduce resonant peaks that cause feedback.
11. GROUND LIFT: Disconnects pin-1 at the XLR out. Helps reduce noise caused by
ground loops.
12. AUX PRE/POST: Changes the signal path of the ¼" AUX OUT. When set to the
inward position (pre) the AUX OUT provides a direct clean buffered feed from your
instruments. When set to the outward position the AUX OUT is like the main XLR
output, post tube stage, fi lter section and insert loop.
13. TUNER OUT: Always-on, high-Z output used to connect an electronic tuner.
14. REMOTE: Used to connect the optional JR2 remote footswitch. When connected, this
lets you select the active input channel or mute the Firefl y for tuning.
15. AUX OUT: High-Z thru-put for stage amp. Confi gurable 'pre or post' tube and insert.
16. INSERT: Buffered effects loop uses standard ¼" TRS send & receive cable to interface
guitar pedals and studio rack effects.
17. INPUTS A & B: High-Z inputs lets you switch between two instruments for quick on-
stage changes. The input level is set using the TRIM-A & B controls.
18. AUX THRU (side panel): Recessed switch engages transformer
isolation for ¼" AUX OUT to eliminate hum and buzz caused by
ground loops.
Radial Engineering Ltd.
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Firefl y™ Tube Direct Box
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