Speaker Fuse; Line Fuse (A/C Or Mains Fuse); A/C Cord Receptacle; Internal Feature: Vacuum Tube (Valve) - SWR 750x Bass Amplifier 750x Owner's Manual

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

Speaker Fuse

The speaker fuse is provided to protect your speakers in the unlikely event of a power amp failure or to pro-
tect your power amplifier from incorrect speaker impedances or hookups. Size and rating of the fuse is 3AG,
10 amp, fast-blo. Do not defeat the purpose of this feature by using a higher rated fuse as it can damage
your amplifier and void your warranty.
The fuse can open as a result of a fault in the speaker cable, the speakers themselves, or the power amp
being sent well into clipping. With this in mind, it is wise to carry extra fuses at all times.

Line Fuse (A/C or Mains Fuse)

This fuse is provided to protect the internal electronics against power surges, etc. It also protects the unit
against itself should one of the internal components fail. If this fuse should open, replace it with the same
type of fuse and rating. Do not defeat the purpose of this feature by using a higher rated fuse as it can void
your warranty.
Proper size of the A/C fuse for all countries is 3AG. Proper rating of the fuse is as follows:
United States: 10 amp slo-blo
Japan: 10 amp slo-blo
Europe (230V-240V): 5 amp slo-blo

A/C Cord Receptacle

This receptacle accepts a standard A/C power cable (supplied with the 750x in the United States) used with
almost all current musical, professional and household electronic devices. We recommend great care when
packing up. If your unit is not in a rack case, put the cable in your instrument or accessory case or leave it
attached and looped around one of the rack handles. If it does become misplaced, a replacement cable can
be purchased at almost any music or computer store.
Note: The rating for this cable is 3 conductor, 10 amperes minimum. Look for this rating on the
cable. Make sure the cable is plugged in all the way in both the amp and the wall socket.

Internal Feature: Vacuum Tube (Valve)

SWR installs a specially selected 12AX7A dual triode on the preamp circuitboard of every 750x. If this tube
needs replacing, we recommend that you replace it with a similar high quality product. This tube will need
replacing if it becomes noisy or microphonic (which sounds like glass tinkling in the background of certain
notes), or completely fails (causing no signal or signal at ver y low levels). The tube in your 750x should last
one to three years, depending on usage.
16 • 750x OWNER'S MANUAL