SWR Sound POWER 750 owner manual Turning the Unit on, Getting Sound OUT of the Power

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TURNING THE UNIT ON

Remove the AC cable from the accessory pack and connect it from the amplifier's AC receptacle to a standard wall outlet. Make sure that the Volume control is set to the minimum position. Locate the power switch on the right side of the front panel and turn the amplifier on. The LED above the power switch should then illuminate. Upon powering up, don't be surprised if you hear a small pop. This is absolutely normal. (Fully eliminating this "power on transient" would require a component called a relay. SWR chose not to incorporate this type of component due to the fact that relays degrade signal quality and often fail, causing the unit to have no output and requiring a trip to a local service center.) This "pop" can be avoided by having the Speaker On/Off switch in the "OFF" position during powering up.

GETTING SOUND OUT OF THE POWER 750

Plug your instrument cable directly into the unbalanced input jack on the rear of the unit. Make sure the Speaker On/Off switch is in the "ON" position. Turn your instrument's volume up to maximum and begin playing. Now turn the Volume control clockwise from minimum slowly toward maximum. You should now hear the sound of your instrument amplified through the Power 750 into your speaker cabinets. The LED's may not light up at all, or perhaps only the first (-20 dB) will illuminate. This is normal, as we are bypassing the preamp in this instance simply to determine that your Power 750 is in fine working order, just as it left the factory.

CONNECTING YOUR PREAMP TO THE POWER 750

Plug your instrument cable into the input of your preamp. Make sure you properly adjust the gain and volume controls of your preamp before sending the signal to your Power 750. (Check the manual of your preamp for instructions.) Often a preamp will have both a pre-level (usually listed as "gain") and a post-level (usually listed as "post" or "master"). If the signal is clipping or distorted before it leaves your preamp, it will only get worse when the Power 750 amplifies that distorted signal.

Once you have achieved proper level settings on your preamp, run a high-quality shielded 1/4" patch cable from the unbalanced output of your preamp to the unbalanced input on the rear of the Power 750. (The option for a balanced XLR connection exists as well, but we'll discuss that later.) Make sure the Volume Control on the front of the Power 750 is set to minimum. Set the Speaker On/Off switch to the "ON" position. Begin playing your bass and slowly turn up the Power 750 Volume Control. Note the Four Segment LED Dot Bar Display as you adjust your level, making sure to keep the signal out of

"constant red." By the time your preamp is sending a healthy signal to the Power 750, and the Power 750 Volume Control is set so that your hardest notes are just barely illuminating the +3 dB (red) LED on the front panel, chances are you'll be feeling your insides rumble.

We urge to you to read the remainder of the manual completely and thoroughly for descriptions of all the functions and features on your new Power 750, as well as detailed operating instructions relating to the power amp and speaker outputs.