THD bivalve-30 사용자 가이드
THD BIVALVE-30 INSTRUCTION MANUAL
6
Back Panel
Now lets go through the BiValve-30’s back panel jacks and controls, starting from the
right:
Output jacks: You can connect either one or two speaker cabinets to the BiValve-30
using these two output jacks. Only use speaker (not instrument) cable. The outputs are
wired in parallel, so two 16-ohm loads result in an 8-ohm total load, two 8-ohm loads
result in a 4-ohm total load, and two 4-ohm loads result in a 2-ohm total load.
Impedance switch: This switch allows you to set your BiValve-30 to match the
impedance of your speaker cabinet. Most speaker cabinets and combinations of cabinets
will use the "8 or 16 Ohm" setting. However, if you use 4-Ohm loads you will find the
"2 or 4 Ohm" setting to be slightly louder, and has a bit more low-mids. Of course, this
side should be used for 2-Ohm loads. The Standby switch should be engaged when
switching between impedance settings.
Line Out Level: This control adjusts the output level of the Line Out jack.
Line Out Jack: The BiValve-30 offers a transformer-isolated line out. This output jack
delivers a line level signal from the power amp. Use a 1/4” instrument (not speaker)
cable with this output. You can use the line out jack to send the signal directly to a
mixing console or recording system. Keep in mind that you will need a speaker simulator
in between the line out and your recording equipment if you want to record the BiValve-
30 from the line out.
LINE/INSTRUMENT Switch: This switch determines if the line out signal will be at
the line-level (+4 dB) or instrument-level (-10 dB) signal range.
FX loop: Using 1/4” instrument (not speaker) cables, you can connect line level (+4 dB)
effects to the BiValve-30. The FX loop is after the preamp section, and before the power
amp. Connect the BiValve-30’s Send jack to your line level device's input, and your
device’s output to the BiValve-30’s Return jack. You can also use the send to connect the
BiValve-30’s preamp to the return of any other amp with an effects loop in order to use
the preamp of the BiValve-30 with the power section of that amp.
Power Tube Fuse: Each power tube has it’s own fuse in the cathode circuit. When the
tube goes bad, either due to excessive wear, age, short or a leak in the seal, it will draw
excessive current and it’s associated fuse will blow. When the fuse blows, its LED will
light. Disconnect the power cord before replacing this fuse. Replace it only with a fuse
of the same type and rating. Also, replace the tube associated with the fuse that blew.
This is clearly marked on the chassis.