7
IMPEDANCE SELECTOR
three-way rotary selector. Set to the position that matches the impedance of your speaker cabinet.
NOTE
– if you are using two speaker cabinets in parallel (ex – two 16 Ohm cabinets), set the impedance selector to half that of
a single cabinet (in this case, 8 Ohms).
SPEAKERS
¼
” speaker cable jacks. Use a
¼
” speaker cable to connect your speaker cabinet to the amplifier using these
jacks. If you use one speaker cabinet, either jack is acceptable.
NOTE
– never turn your amplifier to OPERATE mode (“1” / DOWN position on STANDBY) without connecting the amplifier to a
speaker cabinet or suitable dummy load! Failing to do so may damage your amplifier!
FULL / HALF
switches the power output of the power amp. For the 100W JCM800, half mode is approximately 50W, and for
the 50W JCM800, this is approximately 20W. HALF mode configures the power tubes to run in triode operation, and this
negates any need to reconfigure the IMPEDANCE SELECTOR.
BIAS TEST
and
COM
multimeter probe jacks – use this for external bias current measurements (see Section 5, Page 8)
HT FUSE
T500mA fuse – used to protect your amplifier from voltage spikes or excessive current draw. Replace only when
necessary.
MAINS FUSE
slow-blow fuse – used to protect your amplifier from voltage spikes or excessive current draw. Replace only
when necessary. 3A is used for amplifiers used with a 120VAC country supply, and 2A is used with 240VAC.
MAINS
IEC cable inlet – plug a suitable IEC power cable into this inlet to power your amplifier
