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The Rear Panel:
17. AC LINE CORD (not shown): Connect the male end of this
heavy duty power cord to a properly grounded AC power
outlet of the correct voltage. DO NOT attempt to defeat the
ground pin of the power cord! (If your amplifier was pur-
chased outside the United States, see the rear panel serial
number label for voltage and current information.)
18. IMPEDANCE SWITCH: For the best performance and
least strain on the amp, you MUST match the amp’s
impedance to that of your speaker cabinet(s). Set the
selector switch to the 8 or 16 ohm position, depending on
the total impedance of your cabinets. The chart below can
help you determine that impedance based on the follow-
ing combinations of speakers connected in parallel.
CAB
IMP. # OF CABS TOTAL IMP.
16 ohms 2 8 ohms
32 ohms 2 16 ohms
32 ohms 4 8 ohms
19. SPEAKER JACKS: Connect the amplifier to your speak-
er cabinet(s) via these jacks, using heavy-duty speaker
cables (not instrument patch cords). Use cabinets rated at
8 ohms or higher, in combinations which never create a
load lower than 8 ohms. Make sure the Impedance switch
(#18) is properly set. Always use the MAIN speaker jack
first, then connect to the EXTENSION jack if using more
than one cabinet.
Connecting to the Insert Jack:
The front panel Insert jack (#6) lets you patch external
effects into the GT-500H just prior to its power amp stage.
When using Crate’s CYC6MS stereo-to-mono Y-cord, connect
its 1/4” stereo plug into the amp’s Insert jack, its “send” plug
into the IN jack of the effect and its “return” plug into the OUT
jack of the effect.
Another method is to buy or make a stereo-to-mono Y-
adapter (such as Crate’s CA11Y) and use two 1/4” signal
cables to patch into the effect as shown below.
SPEAKER
IMPEDANCE
SPEAKERS
50 WATTS RMS
8
MODEL: GT-500H
16 EXT. MAIN
(USE FIRST)
47-269-04
Made in the
U.S.A. by
SLM ELECTRONICS
1400 Ferguson Ave.
St. Louis, MO 63133
18 19
To Insert Jack
TIP = RETURN
RING = SEND
SLEEVE = GROUND
TIP
RING (send):
Connect to IN
jack of effect
TIP (return):
Connect to OUT
jack of effect
INOUT
RING
SLEEVE
GT-500H Amplifier