Using TWO Speaker Cabinets, Turning the Unit on

USING TWO SPEAKER CABINETS

Connect the speaker cables of your choice (1/4" or Speakon) from the speaker out jacks on your Power 750 to the inputs on speaker cabinets. Can you use one 1/4" output jack and a Speakon output jack at the same time? Yes. Remember, all of the Speaker Outputs are coming off of the same mono power amp inside the unit.

If the cabinets are the same impedance, the same amount of power will be sent to each enclosure. If the cabinets are different impedances, more power will flow to the cabinet with the lower impedance. In a mono situation, equal impedances are ideal since there is no individual control over each cabinet's volume, but there's no law against using cabinets of different impedances, just so long as the total impedance is equal to, or higher than the amplifier's minimum total impedance (2.6 ohms on the Power 750, or an 8 ohm and a 4 ohm enclosure connected together in parallel).

In plainer terms, this means you can safely use:

a)two 8 ohm cabinets

b)one 8 ohm and one 4 ohm cabinet

c)three 8 ohm cabinets

And you cannot use:

a)one 2 ohm cabinet

b)two 4 ohm cabinets

Again, make sure to check the power handling capabilities and impedances of the speaker cabinets you wish to use against the "Power 750 Specifications" section of the manual.

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" posi- tion. Turn your instrument's volume up to maximum and begin playing. Now turn the Volume control clockwise from minimum slowly toward maxi- mum. 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.

POWER 750 • 5

750 specifications

The SWR Sound 750 is a powerful and versatile bass amplifier that has garnered a solid reputation among musicians and sound engineers for its exceptional performance and reliability. Ideal for both live settings and studio recordings, the SWR Sound 750 blends cutting-edge technology with user-friendly design, making it a top choice for bassists of all levels.

One of the standout features of the SWR Sound 750 is its impressive power output. This amp delivers 750 watts of pure power at 4 ohms, ensuring that users can achieve a loud, punchy sound in any environment. The onboard power management system also optimizes the amplifier's performance, allowing for dynamic control and responsiveness to playing styles.

The SWR Sound 750 incorporates advanced tone-shaping technologies that enable musicians to sculpt their sound with precision. It features a 4-band EQ section, allowing for detailed adjustments to the high, mid, and low frequencies. This gives bassists the ability to enhance their tone, whether they are looking for a deep, rich low end or a bright, cutting high end. Additionally, a built-in compressor helps to smooth out the tonal inconsistencies, providing a consistent sound across various playing dynamics.

Versatility is another key characteristic of the SWR Sound 750. It includes multiple input options, catering to both active and passive bass guitars. The amp also features a balanced XLR line out for seamless integration into live sound systems, making it suitable for gigging musicians who require reliable connectivity and high-quality sound.

Durability is crucial in a performance environment, and the SWR Sound 750 is built to withstand the rigors of the road. The sturdy chassis and robust components contribute to its long-lasting performance, ensuring that it remains a reliable choice for touring musicians. Additionally, its lightweight design makes it easy to transport without sacrificing sound quality.

The SWR Sound 750 is more than just an amplifier; it is a comprehensive solution for bassists. With its powerful performance, advanced features, and rugged construction, this amplifier has established itself as a trusted choice for musicians seeking to elevate their sound in any scenario, be it on stage or in the studio. Whether you are playing in a small venue or a large concert hall, the SWR Sound 750 is designed to deliver powerful, professional-grade audio that enhances the overall performance.