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SWR
POWER 750 POWER 750
OWNER’S MANUAL OWNER’S MANUAL
SWR
8860 E. Chaparral Rd. Suite 100
Scottsdale, AZ 85250-2618 USA
PHONE: (480) 596-9690
FAX: (480) 367-5262
EMAIL: custserve@fenderusa.com
WEB: WWW.SWRSOUND.COM
C 2002 SWR
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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. Retain Instructions: The safety and operating instructions should be retained for future reference. C. Heed Warnings: All of the warnings on this product and in the operating instructions should be ad
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POWER 750 OWNER’S MANUAL 1 INTRODUCTION INTRODUCTION Congratulations on your purchase of the SWR Power 750! You now own one of the meanest, toughest and loudest power amps ever made specifically for bass guitar. Bassists have a unique burden when it comes to power, because it takes considerably more power to amplify lower frequencies than it does for higher ones. That's why your guitarist can blow people away with his 100 watt combo amp, and you can't even leave the house with less than 200 wa
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2 SWR SWR POWER POWER 750 750 FRONT PANEL FEATURES FRONT PANEL FEATURES • Rack Handles • Volume Control • Four Segment LED Dot-Bar Display • Speaker On/Off Switch • Power On/Off Switch REAR PANEL FEATURES REAR PANEL FEATURES • Unbalanced (1/4") Input Jack • Balanced (XLR) Input Jack • Ground/Lift Switch (for Balanced XLR Input Jack) • Slave Output Jack • Fan On/Off Switch • Two 1/4" Speaker Output Jacks • Two Speakon Speaker Output Jacks • One Speaker Fuse (3AG, 15 amp fast-blo) • One Line Fuse
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3 POWER 750 SPECIFICATIONS POWER 750 SPECIFICATIONS The Power 750 Power Amplifier from SWR Sound Corporation is a high quality, all purpose power amplifier. It uses a discreet power supply, quasi-complementary power amp design utilizing SIX 15 amp, 250 volt bi-polar NPN devices direct coupled to the output via an in-line speaker fuse. Note: All measurements were taken with a line voltage of 120VAC. All noise specifications are "unweighted." All voltages and watts are "RMS." POWER OUTPUT: POWE
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GETTING STARTED GETTING STARTED 4 CONNECTING YOUR SPEAKER CABINETS CONNECTING YOUR SPEAKER CABINETS The Power 750 is a MONO amplifier. All of the speaker outputs (both 1/4" and Speakon) are in parallel, meaning that they all run off of the same mono power amplifier inside the unit. The number of speaker cabinets you use is your choice, but there are factors that will help you make that choice. Please keep in mind that the Power 750 delivers 750 watts into one 4 ohm speaker cabinet. Make sure
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5 TURNING THE UNIT ON 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
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FRONT PANEL FEATURES FRONT PANEL FEATURES 6 RACK HANDLES RACK HANDLES The rack handles were chosen for comfort while carrying your Power 750 from place to place. They will also protect the front panel controls in the event the unit is dropped on its face. In some types of racks, the handles may need to be removed before installation. This is easily done by removing the four screws holding them to the front panel. VOLUME CONTROL VOLUME CONTROL The Volume control affects the amount of signal drivi
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REAR PANEL FEATURES REAR PANEL FEATURES 7 INPUT SECTION INPUT SECTION UNBALANCED INPUTS UNBALANCED INPUTS This is the main power amp input jack for most applications, and should connect to the "Unbalanced Output" on your preamp of choice (preferably an SWR Interstellar Overdrive or Grand Prix!). This input utilizes a standard 1/4" phone jack. Input impedance for the unbalanced input is 33K ohms. Maximum input level is 16 volts RMS. BALANCED INPUT JACK BALANCED INPUT JACK Some preamps are equip
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8 HOW IMPEDANCE AFFECTS POWER RATINGS HOW IMPEDANCE AFFECTS POWER RATINGS People often have questions about impedance. What is it? The root of the word "impedance" is the verb "impede", which means to block or resist. That's what impedance is - resistance to power. Power amps do not have a pre-determined impedance. They deliver power at whatever impedance the speaker cabinet tells it to. That's why you hear the term "slave amp" - amplifiers only do what they're told. So if someone tells yo
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9 POWER 750 POWER DELIVERY CAPABILITIES (POWER RATINGS) POWER 750 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 Power 750 can deliver at that imped- ance. Those ratings are as follows: 850 watts @ 2.6 ohms 750 watts @ 4 ohms 450 watts @ 8 ohms So if you have two 8 ohm speaker cabinets, the
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10 SPEAKON VS. 1/4" JACKS SPEAKON VS. 1/4" JACKS We have found the Speakon connection to be superior in both stability and amperage conductivity, and so we have provided Speakon output jacks in addition to the standard 1/4" jack. If using the Speakon output jack, we highly recommend the use of a Speakon-to-Speakon speaker cable, one of which is supplied with your unit. (All SWR Professional Series speaker cabinets man- ufactured after January of 2000 come equipped with Speakon input jacks.) I
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11 A FEW WORDS CONCERNING HEAT A FEW WORDS CONCERNING HEAT One of the most asked questions about our amplifiers is why they tend to get warmer than other amps. The chassis of your amplifier can get quite warm during normal usage. This is especially true if you are are driving the amplifier at its minimum impedance. This is because a 2.6 ohm impedance introduces the least efficient condition possible for the unit (ie: power drawn from the outlet in relation to power produced in the speakers). T
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12 ELECTRICAL AND GROUNDING CONSIDERATIONS ELECTRICAL AND GROUNDING CONSIDERATIONS In a rack system with a large power amplifier such as the Power 750, placement of effects units and preamplifiers with respect to the power amplifier may be important as hum induction may occur. Generally speaking, install a preamplifier so that it is far- thest away from the power amplifier with line level effects units, tuners, etc., in between. Whenever possible, leave an empty rack space between the power amp
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LIMITED WARRANTY LIMITED WARRANTY The POWER 750 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. This warranty is VOID if the unit has been damaged due to accident, improper handling, installation or operation, shipping damage, abuse or misuse, unauthorized repair or
