SWR Sound SM-1500 manual Rear Panel

Rear Panel

AA..Balanced line OutpuT—A fully featured, true electronical- ly-balanced XLR jack for output to studio and live performance mixing consoles.

BB.0° / 180°—Press to reverse the polarity of the Balanced Line Out jack; useful for reducing phasing problems that may occur when playing in locations with non-standard wiring or when combining Line Output with miked cabinet signal. Normally, leave this switch out.

CC.GROUND / LIFT—Disconnects the ground connection (pin-1) from the Balanced Line Out jack to reduce ground loop noise generated from non-standard wiring. Normally, leave this switch out.

DD.LEVEL—Adjusts the output level of the Balanced Line Out jack to accommodate a variety of sound equipment connections and input sensitivities.

EE.DIRECT / COMPRESSOR OUTPUT / LINE—Choose the point in the signal path to connect the Balanced Line Out jack. See Block Diagram on page 11.

  •  Direct (Pre)—Just after the first stage–no EQ. Most like a Tube D.I. (direct box).

 •  Comp Output—Depends on the Comp Position switch {J}. Always post Gain and Aural Enhancer, but either pre or post Bass Intensifier and EQ circuits.

 •  Line (Post)—After all preamp circuits, including Boost and Effects. Not affected by Master Volume {Y}.

FF.EFFECTS LOOP—TRS1multipurpose jacks—Send provides a preamp output and includes onboard tone shaping. Output level is primarily controlled by Gain {Q}. Effects Return (wet) signals are mixed with the onboard preamp (dry) signal in any ratio set by the Effects Blend control {X}. Effects Loop can be bypassed from the footswitch.

The effects loop on the SM-1500 is located on a "side chain" circuit, a design used in studio equipment to isolate the effects from the main circuit. This provides the full sound of your instrument AND allows the diversity of your external effects to

come through. The effects circuit is also located after the gain stages in the preamp signal path to bypass the noise associated with effects inline before the preamp.

 • Effects Devices: Connect Send to your effects device input and the effect's output(s) to the Left/Mono Return (mono effects) or both Return jacks (stereo effects). NOTE: On your effects device—set any wet/dry control fully to WET to prevent phas- ing problems and set any input level control to +4dB (or 0dB if the unit is being overdriven). NOTE: Stereo effects are automati- cally summed to mono in Bi-amp and Bridge modes.

 • Multiple Amplifiers: For additional output, you can connect an auxiliary power amp to your SM-1500’s Effects Send output (Gain on your SM-1500 will affect the volume levels of both amplifiers). NOTE: If you wish to use an SWR® amp as an auxil- iary power amp, use Mono Effects Return as the input and turn the Effects Blend control to the maximum WET position.

 • Accompaniment: Connect a CD player or drum machine to either the Mono Return or both Stereo Return jacks. Adjust accompaniment volume from the device and with the Effects Blend control {X}.

GG.LOW OUT—TRS1line level, 1/4" output. Supplies low frequen- cies; useful for connection to an external power amplifier in a bi-amp configuration. NOTE: This output is always active, inde- pendent of the positions of the mode switches {HH and PP}.

HH.STEREO / BI-AMP—Selects a core mode of operation for the SM-1500 power amplifiers—when not in Bridge mode {PP}:

  •  Stereo Mode—The power amplifiers operate separately as left and right channels. In Stereo Mode, use both Volume knob {Y} sections as labeled ("Left" and "Right").

 •  Bi-AmpMode—The power amplifiers operate separately as low– and high–frequency channels. In Bi-Amp Mode, use both Volume knob {Y} sections, "Right" for low frequencies and "Left" for high frequencies. (Stereo effects will be summed to mono.)