IMPORTANT SAFETY INSTRUCTIONS CAUTION: TO REDUCE RISK OF ELECTRIC SHOCK, DO NOT REMOVE THE COVER OR BACK. NO USER-SERVICEABLE PARTS INSIDE. PLEASE REFER TO A QUALIFIED SERVICE TECHNICIAN. A. Read Instructions: All safety and operation instructions should be read before the product is operated. B.
SWR tone. A little history: The SWR 750x is an upgraded version of the Bass 750, a model we’ve offered since 1999 in response to demand for an amp that delivered the punch and volume of classic high-powered amplifiers, coupled with the sound and clarity SWR is known for.
750x – FRONT PANEL FEATURES • Dual independent input jacks compatible with both passive and active instruments • Preamp Gain control with red LED clip indicator • Aural Enhancer control • Overdrive Activator Switch (illuminated red when engaged) • Overdrive “Drive” Control •...
Using a speaker cable of 18 gauge or heavier (the heavier the cable, the lower the gauge), simply connect any one of the 750x’s Speaker Output jacks to the input jacks of your speaker cabinet. If your cabinet is a 4 ohm enclosure, the 750x will deliver will deliver 750 watts into it.
Important: The minimum total impedance when operating the 750x is 2.6 ohms. This means you can safely use: a) A single 8 ohm cabinet b) A single 4 ohm cabinet c) Two 8 ohm cabinets (total: 4 ohms) d) One 8 ohm cabinet and one 4 ohm cabinet (total: 2.6 ohms) ** e) Three 8 ohm cabinets (total: 2.6 ohms) **...
10 dB or more, you may find the Active input more compatible. The best judge is your own ears. If you’re using a keyboard or bass pedal with the 750x, we have found the best choice to be the Active input.
Based on the extremely popular circuit from SWR’s groundbreaking Mo’ Bass Soundstation, the Tube Overdrive onboard your 750x has been carefully calibrated to give you as much (or little) overdriven signal as necessary, all the while keeping the low end (and ultra-high end) wholly intact through the use of low and high-pass filters.
This is normal. SubWave™ Controls Once again, based on the circuit from SWR’s Mo’ Bass, the SubWave™ on your 750x is a lightning-quick sub-octave wave engine with tracking superior to other models of sub-octave effects currently on the mar- ket.
Midrange Controls Your 750x comes equipped with two different controls for setting the amount of midrange present: one for boosting and cutting the level of midrange, and another for setting the specific midrange frequency that will be adjusted in level.
Variable Limiter Control The 750x’s soft knee-type limiter is there to help you protect your power amp from harmful states of oper- ation. The circuit is located after the Master Volume and before the power amplifier, so it’s driven by the Master Volume control.
LINE position (dictated by the setting of the Effects Blend control on your 750x). When in this position, the output level will be affected by the Gain control on the front panel as well as the XLR Pad control.
Sometimes connecting to certain mixing boards or studio consoles with non-standard XLR wiring can cause a ground loop. Your 750x has a push-button switch for lifting the ground on the Balanced (XLR) Output. (It affects no other outputs.) Pushing on the switch will change the mode of operation. When the switch is in the “out”...
To use this feature, connect a shielded patch cord from the Tuner Out jack on your 750x to the input jack on your tuner. Turn the amplifier on and you’re ready to go. If you do not wish to monitor your sound dur- ing the tuning process, you may turn down the Master Volume or set the Speaker On/Off switch to “Off”.
The power amp in your 750x is cooled by two methods: a) an (internal) extruded aluminum heatsink; b) a fan. Be sure to leave at least a 1/2" clearance between the vent on the top of your 750x and anything you wish to put on top of it.
• One 4 ohm speaker enclosure The optimum operating impedance for the 750x is 4 ohms. This way you get a good amount of power from the amp (750 watts—we’d call that “a good amount!”) without operating too closely to the minimum imped- ance—or, in simple terms, without running the amplifier too hot.
Yes, but one speaker cabinet will get more power—and be louder— than the other. Since your 750x is a mono amplifier, it is best to use cabinets of similar impedances when using more than one. The best two-cabinet setup is to use two 8-ohm enclosures.
(which sounds like glass tinkling in the background of certain notes), or completely fails (causing no signal or signal at very low levels). The tube in your 750x should last one to three years, depending on usage.
The 750x takes up three full rack spaces. If the rack in which you mount your 750x requires that the rub- ber feet on the bottom of the chassis be removed, please remember to keep the screws handy in case you wish to reattach the rubber feet at a later date.
750x LIMITED WARRANTY The SWR 750x from FMIC is warranted to the original consumer purchaser for TWO YEARS from the date of purchase, against defects in materials and workmanship and provided that it is purchased from an Authorized SWR Dealer. This warranty applies only to products purchased in the USA or Canada.