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750x Power Delivery Capabilities (Power Ratings)
After determining how the number of cabinets you wish to run affects the total operating impedance, you
need to take into account the power handling capabilities of your speaker cabinets as compared to what the
750x can deliver at that impedance. Those ratings are as follows:
750 Watts @ 4 ohms
450 Watts @ 8 ohms
So if you have two 8 ohm speaker cabinets, they will each get up to 375 watts of power, and more during
transient peaks. A single 4 ohm cabinet will get 750 watts of power, and again, more during peaks. Make
sure your speaker cabinet(s) can handle the power!
Remember, it's always better to have a little too much power than just barely enough. If you find yourself
constantly wanting more power than the 750x provides, either:
a) Tell your bandmates to turn down
b) Tell the monitor engineer to turn you up
c) (best option) Take the time to investigate getting an external power amp and/or additional speaker
cabinets to supplement your rig.
Note: The frequency response of the 750x is far greater than usually found in musical instrument
amplifiers (20 Hz to 40 kHz). This was engineered in order to give the bass player the same punch
and clarity on stage as found in the studio or concert PA. systems. Therefore, it is doubly important
that you are aware of the impedance and power rating of the speakers that you intend to use, and
that they are compatible with the 750x. Speakers that have been overdriven are easy to detect and
generally do not fall under a manufacturer's warranty.
Speaker Output Jacks
Two 1/4" phone jacks and two Speakon jacks (all wired in parallel) are provided for connection of the 750x
to your speaker system. Whenever possible, use of the Speakon jacks is recommended. Speakon jacks and
connectors offer the best possible connection and are far superior to banana or 1/4" phone jacks in that
they not only lock in place (preventing accidental disconnection), but also offer a greater and more stable
connection surface. This solid connection provides a more effective transfer of power to your speakers.
Only SPEAKER CABLE of 18 gauge or heavier (the heavier the cable, the lower the gauge) should be used to
connect your 750x to your speaker system. Do not use shielded instrument cable to connect your amplifier
to your speaker enclosure, as this can result in intermittent power loss, cause your amp to oscillate and
damage itself and/or your speakers, and render the cable useless for any purpose.
Note: Unlike most amplifiers on the market, the 750x can be used for recording purposes without
speakers attached to the speaker output jacks (using only the Balanced [XLR] Output).
Recommended single SWR Speaker enclosures for use with the 750x include:
• Megoliath 8x10
• Goliath Senior 6x10
• Big Bertha 2x15
• Henry The 8x8
• 12-Stack 4x12
• Workingman's Tower 8x10
Recommended SWR Speaker combinations for use with the 750x include (all are 8 ohm models):
• (2) Goliath III 4x10s
• (2) 12-Stack 4x12s
• (2) Son Of Bertha 1x15s
• (1) Goliath III 4x10 & (1) Son Of Bertha 1x15
• (1) Goliath III 4x10 & (1) Big Ben 1x18
• (1) Goliath III 4x10 & (1) Goliath Junior III 2x10
20 • 750x
