Crate Amplifiers manual The Rear Panel, BV120H All Tube Guitar Amplifier, Cab. Imp

BV120H All Tube Guitar Amplifier

The Rear Panel:

19 20 21 22 23 24 25 26 27

19.IMPEDANCE SELECTOR: For the best performance and least strain on your amplifier, you MUST properly match the impedance of your amplifier 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 speaker cabinet(s). The chart below can help you determine that impedance based on the following combinations of speakers connected in parallel.

CAB. IMP.	# OF CABS. TOTAL IMP.
8 OHMS	1	8 OHMS
16 OHMS	1	16 OHMS
16 OHMS	2	8 OHMS
32 OHMS	2	16 OHMS
32 OHMS	4	8 OHMS

20.MAIN SPEAKER JACK: Use this jack to connect the amplifier to your pri- mary speaker cabinet by means of a heavy gauge speaker cable. Always keep the impedance at 8 or 16 ohms, with the impedance selector switch (#19) at the proper setting.

NOTE: Use the MAIN SPEAKER jack first. Then, if an extension speaker is desired, connect it to the EXT. SPEAKER jack.

21.EXT. SPEAKER JACK: Use this jack to connect the amplifier to a sec- ondary speaker cabinetby means of a heavy gauge speaker cable, after a speaker has been connected to the main speaker jack (#20).

22.LINE OUT JACK: This 1/4” jack sup- plies a line-level output signal from the power amp for patching into a mixing board, recording console or external amplifier. The signal is tapped directly from the speaker outputs, then attenuat- ed and electronically compensated to simulate the sound of a “miked” cabinet.

23.EFFECTS LOOP RETURN: Connection from an external effects device is made via this jack. Connect a shielded instrument patch cord from the output jack of the effect to the return jack. This jack is active only when the effects loop is switched in. The return jack also doubles as a "power amp in" jack, to feed a line-level signal directly into the BV120H's internal power amp. This is useful when "slaving" two ampli- fiers together.

24.EFFECTS LOOP SEND: Connection to an external effects device is made via this jack. Connect a shielded instrument patch cord from the send jack to the input jack of the effect. This jack is always active. The send jack also dou- bles as a "preamp out" jack, to feed a post-eq,pre-amplified signal to a mixing board, recording console or external amplifier.

25.FOOTSWITCH JACK: Connect a stereo 1/4” (tip/ring/sleeve) here from a two-button footswitch (such as the Crate CFP-2) for remote control of channel switching and the effects loop. The tip of the jack is for the channel switching; the ring is for the effects loop. When a footswitch is connected here, the front panel channel select and effects loop switches are disabled.

26.AC LINE IN: This grounded power cord is to be plugged into a grounded power outlet, wired to current electric codes and compatible with voltage, power, and frequency requirements stat- ed on the rear panel. Do not attempt to defeat the safety ground connection.

27.FUSE: This fuse protects the amplifi- er against damages caused by overload conditions in the unit. If the fuse fails, replace it only with the same size and type as indicated on the rear panel. If the fuse fails continually, the line voltage may be incorrect, or the amp may need servicing.

5