THD Electronics Flexi-50 - Manual (Page 5)

THD FLEXI-50 INSTRUCTION MANUAL 5
Back Panel
Now lets go through the Flexi’s back panel jacks and controls:
1. Output jacks: You can connect either one or two speaker cabinets to the Flexi 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
ohms total load, and two 4 ohm loads result in a 2 ohm total load.
2. Impedance switch: This switch allows you to set your Flexi for the proper impedance
of your speaker cabinet load. Most speaker cabinets and combinations of cabinets will
use the "4, 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. One of our innovations is that the Flexi always uses
100% of the transformer windings all of the time. This assures you a full, even output
sound, regardless of the impedance setting. The power and output transformers are fully
shielded to assure that hum and noise are kept to an absolute minimum, and that pickup-
feedback from transformer coupling is all but eliminated.
3. 10K ohm Line Out jack: 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 this output
to slave to another amp or to go direct 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 Flexi from the line out. When using the line out, you
must have a speaker or dummy load connected to the speaker outputs, as the Flexi does
not have a built-in Hot Plate like the THD Univalve and THD Bivalve. You may,
however, purchase a THD Hot Plate, set it to “Load” and then use the line out from the
Flexi.
4. Line out Level: This control adjusts the output of the Line Out jack.