Rack Mounting Instructions - SWR 550x Owner's Manual

Swr 550x bass amplifier owner's manual

Operating instructions manual (124 pages)

Table of Contents

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 AC fuse for all countries is 3AG. Proper rating of the fuse is as follows:

United States: 8 amp slo-blo

Japan: 8 amp slo-blo

Europe (230V-240V): 4 amp slo-blo

A/C CORD RECEPTACLE

This receptacle accepts a standard A/C power cable (supplied with the 550x 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 550x. If this tube needs replacing,

we recommend that you replace it with a similar high quality product. This tube will need replacing only if it becomes noisy or

microphonic (which sounds like glass tinkling in the background of certain notes), or completely fails (causing no signal or sig-

nal at very low levels). The tube in your 550x should last one to three years, depending on usage.

COOLING FAN

The power amp in your 550x is cooled by two methods: 1) an internal extruded aluminum heatsink; 2) an internal fan. This fan

runs constantly to ensure proper cooling of the amplifier at all times and cannot be defeated. Be sure to leave at least a 1/2"

clearance between the vent on the sides of your 550x and the sides of any rack case or enclosure in which you install your

amp. This will allow for the heat generated by internal components to escape. SWR also recommends at least one empty rack

space in your rack to allow for the best possible airflow.

NOTE: It is normal for the cooling fan to be audible at low levels. In situations where absolute quiet is

necessary (such as in a recording studio when a cab is being miked), simply place the amplifier in a

separate room from the microphone being used for the speaker cabinet.