O.IEC POWER CORD SOCKET—Connect the included power cord to a grounded AC electrical outlet in accordance with the voltage and frequency ratings specified on the rear panel of your amplifier.
P.SPEAKER OUTPUT—Speakon® connector for an external speaker cabinet. The speaker load must be 4 ohms minimum and rated for 160 Watts minimum. Read the Speaker Guidelines on the next page before using this jack.
NOTE: Speaker Output will not operate with Internal Speaker switch in the “On” position.
Q.INTERNAL SPEAKER—Select "On" to use the 10" internal speaker or "Off" to use the Speakon® connector {P}.
R.HEADPHONES—Plug your headphones in here. Use Mute {M} to disable output to the speakers.
S.Effects SEND / RETURN*—Connect Send to the input on your effects device and connect Return to the effects output. NOTE: Set any "wet/dry" control on your effects to the fully WET position to prevent phasing problems, and set any effects input level as close to 0dB as possible.
The Effects Send output signal includes onboard tone shaping and the output level is primarily controlled by the Gain {C} knob. Effects Return provides a line level input that can be blended in any ratio with the onboard preamp signal using the Effects Blend {I} knob.
The Effects Loop circuit is on a “side chain” of the main circuit (as in studio recording consoles) to provide the full sound of your instrument and the diversity of your effects units. This also reduces noise from effects units by being located after gain in the signal path.
T.Tuner OUTPUT*—Plug your instrument tuner in here. Use Mute {M} to disable audio output while using your tuner.
U.Balanced LINE Outputs*—True electronically balanced outputs, suitable for studio and “front-of-house” (live) mixing consoles.
V.XLR GROUND LIFT—Disconnects the ground connection (pin-1) from the XLR jack to reduce ground loop noise generated from non-standard wiring. Leave this switch out, normally.
W.PAD—Adjusts the output level of the Balanced Outputs {U} to accommodate a variety of sound equipment connections and input sensitivities.
X.DIRECT / LINE—Selects the signal source for the Balanced Outputs {U}. Direct is a true all-tube signal path taken immediately after the first tube preamp stage. Line includes all gain, tone, compression and effects circuits.
Y. HORN LEVEL—Adjusts the volume level of the high-frequency horn.
NOTE: See Spellbinder Blue block diagram on page 35.
