EXTENSION SPEAKER JACK
Use an unshielded 2-conductor cable (NOT A GUITAR CORD!) to connect an additional speaker cabinet. Use a high quality,
heavy gauge cable of at least 18 gauge (the lower the gauge, the heavier the cable). The impedance of the speaker should be
8 Ohms or greater. If you wish to connect two additional cabinets be sure their combined impedance is not less than 8 ohms
(equivalent to two 16 ohm speaker cabinets in parallel).
Recommended speaker cabs from SWR are: Workingman’s 1X10T, Workingman’s 1X15T, Workingman’s
2X10T, Workingman’s 4X10T, Son Of Bertha, Goliath III and Big Ben.
STEREO HEADPHONES JACK
By inserting a set of stereo headphones into this jack you will be able to monitor your sound or practice without disturbing your
neighbors. The headphone volume level is adjusted by the Master Volume. We suggest you begin with the Master Volume off
(fully counterclockwise), then slowly bring the volume up to your desired level. If you hear some distortion in your headphones
that is not present with the speakers on, turn down the volume—you are overdriving your headphones and could ruin them.
Any impedance stereo headphones will work. However, optimum impedance is 75 ohms.
THREE WAY SELECTOR SWITCH
The top position, labeled Full Range, activates both the tweeter and the 12" woofer in the Workingman’s 12, as well as the
extension speaker jack. This position is the most typical setting.
The middle position, labeled Headphones Only, disconnects the signal going to the internal speakers and extension speaker
jack. Use this position when listening with heaphones only or for silent tuning (refer to To Tuner section). The Headphones jack is
always active regardless of the switch’s position.
The bottom position, labeled Horn Off, disconnects the tweeter located in the upper right hand corner of the speaker cabi-
net. It will not affect the 12" woofer, headphones or any extension cabinet. If you prefer a “darker” sound or are getting a lot of
fret buzz, clicks, or pick or finger noise, you may want to use this position.
A/C LINE FUSE
The line fuse can open (blow) due to power surges or high powerline transients. This fuse will also open in the event of an elec-
tronics failure inside your amplifier. Correct size and rating of the Line (Mains) fuse: 3AG, 3 amp slo-blow for 120V operation
(North America), and 1 1/2 amp slo-blo for 240V operation.
A/C LINE CORD RECEPTACLE
Accepts a standard A/C power cable (supplied with the Workingman’s 12 in the United States), used with almost all current
musical, professional and household electronic devices. If it becomes misplaced, replacement will be easy at almost any com-
puter, electronics, or pro audio store.
NOTE: The rating for this cable is 3-conductor, 10 amperes. This is a rating of the current capacity of the cable, desig-
nated for higher power-drawing devices like amplifiers. If replacement is necessary, or if you wish to buy a longer cable,
look for the rating on the cable and be sure it is at least 10 amps.
WORKINGMAN’S COMBOS OWNER’S MANUAL • 11