SWR Sound Spellbinder Blue - Manual (Page 8)

◊ ◊ 8
Rear Panel
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.
* NOTE: The rear panel 1/4" jacks {R, S and T} are balanced TRS (Tip/Ring/Sleeve) types:
Tip=positive (+)
Ring=negative (–)
Sleeve=ground.
While standard shielded TS (Tip/Sleeve) "mono" guitar cables may certainly be used, the use of "stereo" TRS cables may improve
signal-to-noise ratio and/or reduce hum, especially when longer connections are required.