Getting Started
The following steps will help you set up your amplifier, and get the levels just right.
SETTINGS:
1.Be sure the amplifier’s POWER switch is off.
2.Turn down both Level controls.
3.On the rear panel, set the SUBSONIC FILTER switch OFF and the CLIP LIMIT switch ON.
4.Determine which AMP MODE is best for your application:
STEREO mode is the typical setup for amplifying stereo signals. INPUT 1 is routed to CHANNEL
1 output, and INPUT 2 is routed to CHANNEL 2 output.
MONO mode is used for sending a mono signal to both outputs, with separately adjustable level controls. INPUT 1 is used in MONO mode (leave INPUT 2 disconnected).
BRIDGE mode uses both outputs to double the power to one speaker (or set of speakers). INPUT 1 is used in BRIDGE mode (leave INPUT 2 disconnected and the B Level control turned down).
NOTE: 4 ohms is the minimum speaker impedance you should connect to the amplifier in BRIDGE mode. See “Do the Math” in Appendix B for information on calculating speaker impedances.
5.Set the AMP MODE switch according to your application.
CONNECTIONS:
1.Using balanced cables, make connections from your mixer (or other signal source) MAIN OUT to your amplifier’s INPUTs.
2.In STEREO mode, connect the cables from your signal source to the amplifier’s INPUT jacks, either XLR or 1/4” TRS.
•The XLR and TRS inputs for each channel are wired in parallel.
•The balanced XLR inputs are wired as follows:
Pin 1 = shield (ground) Pin 2 = hot (+)
Pin 3 = cold
• The 1/4” TRS inputs are wired as follows:
Tip = hot (+) Ring = cold
Sleeve = shield (ground)
3.In MONO mode and BRIDGE mode, connect one cable from the input source to INPUT 1, and connect nothing to INPUT 2.
4.In STEREO and MONO modes, connect speaker
cables to the SPEAKER OUTPUTS, either the binding posts or the Speakon® connectors.
•The binding post connectors are wired as follows:
red = hot (+ speaker terminal) black = cold (– speaker terminal)
•The Speakon connectors are wired as follows: 1+ = hot (+ speaker terminal)
1– = cold (– speaker terminal).
5.In BRIDGE mode, if using the binding post outputs:
•CHANNEL 1 SPEAKER OUTPUT red post = hot (+ speaker terminal)
•CHANNEL 2 SPEAKER OUTPUT red post = cold (– speaker terminal)
Do not use the black terminals.
If using a Speakon connector, connect the Speakon to the center BRIDGED connector.
• The BRIDGED Speakon connector is wired as follows:
1+ = hot (+ speaker terminal)
2+ = cold (– speaker terminal).
6.Plug all the sound system components into suitable AC outlets, properly grounded and capable of delivering adequate current.
7.Make sure your signal source is powered up and delivering signal to the amp.
8.Turn the power amplifier’s switch on. Verify that the POWER LED lights.
9.Slowly turn up both Level controls on the amplifier. You should hear music and see the SIG LEDs flashing. If the OL (Overload) LEDs are flashing, turn down either the Level controls on the amp or the source signal’s output level controls (i.e., master faders), until the OL LEDs either blink occasionally or not at all.
10.For quieter listening, it is preferable to adjust the amp’s Level controls rather than the source signal’s output level (unless you have the source’s control all the way up!).
Things To Remember:
• Never plug amplifier outputs into anything except speakers (unless you have an outboard box specifically designed to handle
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