SWR Sound Amplifier POWER 750 User Manual

SWR

POWER 750POWER 750

OWNER’S MANUALOWNER’S MANUAL

C 2002 SWR

8860 E. Chaparral Rd. Suite 100

SWR

Scottsdale, AZ 85250-2618 USA

PHONE: [phone]

FAX: [phone]

EMAIL: [e-mail]

WEB: WWW.SWRSOUND.COM

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 adhered to.
D. Follow Instructions: All operating and use instructions should be followed.
E. Cleaning: Unplug this product from the wall outlet before cleaning. Do not use liquid cleaners or aerosol cleaners. Use a slightly damp

cloth for cleaning.

F. Water and Moisture: Do not use this product near water; for example, near a swimming pool, wet basement, and the like.
G. Accessories: Do not place this product on an unstable cart, stand, tripod, bracket or table. The product may fall, causing serious injury to

a child or adult, and serious damage to the product.
H. Ventilation: Slots and openings in the unit are provided for ventilation and to ensure reliable operation of the product, to protect it from

overheating, thus these openings must not be blocked or covered. This product should not be placed in a built-in installation such as a
bookcase or rack unless proper ventilation is provided or the manufacturer's instructions have been adhered to.

I. Grounding: This product is equipped with a three-wire grounding-type plug, a plug having a third (grounding) pin. This plug will only fit into a
grounding-type power outlet. This is a safety feature. If you are unable to insert the plug into the outlet, contact your electrician to replace
your obsolete outlet. Do not defeat the safety purpose of the grounding-type plug.

J. Power Cord Protection: Power supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon
them, paying particular attention to cords at plugs and the point where they exit the product.

K. Lightning: For added protection of this product during a lightning storm or when it is left unattended and unused for long periods of time,
unplug it from the wall outlet. This will prevent damage to the product due to lightning and power-line surges.

L. Overloading: Do not overload wall outlets or extension cords as this can result in a risk of fire or electric shock.
M. Object and Liquid Entry: Never push objects of any kind into this product through the openings as they may touch dangerous voltage

points or short out parts that could result in a fire or electric shock. Never spill liquid of any kind on the product.
N. Servicing: Do not attempt to service this product yourself as opening or removing covers may expose you to dangerous voltage or other

hazards. Refer all servicing to qualified service personnel.
O. Damage Requiring Service: Unplug this product from the wall outlet and refer servicing to qualified service personnel under the

following conditions:

1) When the power supply cord has been damaged

2) If liquid has been spilled or objects have fallen into the product

3) If the product has been exposed to rain, water, or other conductive liquids

4) If the product does not operate normally by following the operating instructions

5) If the product has been dropped or damaged in any way

6) When the product exhibits a distinct change in performance.

P. Replacement Parts: When replacement parts are required, be sure the service technician has used replacement parts specified by the
manufacturer or have the same characteristics as the original part. Unauthorized substitutions may result in fire, electric shock, or other
hazards.

Q. Safety Check: Upon completion of any service or repairs to this product, ask the service technician to perform safety checks to
determine that the product is in proper operating condition.

R. Heat: The product should be situated away from heat sources such as radiators, heat registers, stoves or other products that produce heat.

POWER 750 OWNER’S MANUAL

INTRODUCTIONINTRODUCTION

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 watts if you want to be
heard at all in a high­volume situation. Our loyal customer base has been telling us for years that they
wanted a really simple, really loud bass amp. We responded in 1999 with the Bass 750, a black-and­chrome mono beast with a stripped-down EQ and power for days-750 watts into 4 ohms.

So the Power 750 is a natural extension of the idea that spawned the Bass 750. Make it simple, turn it
up, scare the neighbors. There's no switching power supply or digital anything inside. It's all true solid­state power, immediately available at the touch of your finger to the string. The noise and power specifica­tions are exacting, in most cases similar to (or better than) our Stereo 800 power amp, a Bass Player
Magazine award-winner for both Best Buy and Top Tone categories. The design is based on the original
power amp circuit of SWR founder Steve W. Rabe, and as always, every SWR Power 750 is handmade and
individually tested in the United States.

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We truly hope that your purchase of the SWR Power 750 helps bring out the best in your playing and adds
to your enjoyment of music. To that end, we ask that you read this Owner's Manual carefully and thorough­ly so that you can fully realize the potential of your new Power 750. After all, with more than a full "one
horsepower" (one HP = 746 watts) behind you, you'd better know what you're doing before you do it.

Note: Please take a moment to verify that the following items were included in your Power 750 packaging:
AC cable, Owner's Manual, SWR Catalog.

SWRSWR POWERPOWER 750750

FRONT PANEL FEATURESFRONT PANEL FEATURES

• Rack Handles

• Volume Control

• Four Segment LED Dot-Bar Display

• Speaker On/Off Switch

• Power On/Off Switch

REAR PANEL FEATURESREAR 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 (3AG, 12 amp slo-blo)

• AC Power Cord Receptacle

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POWER 750 SPECIFICATIONSPOWER 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:POWER OUTPUT:

850 Watts @ 2.6 ohms
750 Watts @ 4 ohms
450 Watts @ 8 ohms
(minimum load = 2.6 ohms)

INPUT IMPEDANCE:INPUT IMPEDANCE:

Balanced = 10K ohms
Unbalanced = 33K ohms

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OUTPUT IMPEDANCEOUTPUT IMPEDANCE: Slave Output = 100 ohms
SENSITIVITYSENSITIVITY: 1.582 VRMS
LOAD CAPABILITYLOAD CAPABILITY:

2.6 ohms to infinity
NOISENOISE:

Residual = <.00072 volts (720 millivolts)
Signal to noise ratio = <-100 dB

DISTORTIONDISTORTION:

< .026% THD, 1 kHz @ 8 ohms
< .13% THD, 20 Hz to 20 kHz @ 8 ohms
Intermodulation Distortion = .07%

POWER BANDWIDTHPOWER BANDWIDTH: (@ 850 watts RMS) -3dB @ 20 Hz and 40 kHz
CHASSIS AND COVER MATERIALCHASSIS AND COVER MATERIAL: Aluminum (with Chromed Steel Faceplate)
DIMENSIONSDIMENSIONS: 19"W x 5.38"H x 10.5"D (3 rack spaces)
WEIGHTWEIGHT: 32 lbs.