B4R Bass Amplifier
The Rear Panel
33
BI-AMP
*MONO BRIDGE: 1+ HOT, 2+ RETURN
BIAMP: 1+ LOW HOT, 1– LOW RETURN 2+ HIGH HOT, 2– HIGH RETURN
| HIGH | LOW | |
| OUTPUT | OUTPUT | |
CHANNEL | MONO | CHANNEL | |
– BRIDGE + | |||
B | A |
350 WATTS/CH. @ 4 OHMS, STEREO
500 WATTS/CH. @ 2 OHMS, STEREO
2 OHM MINIMUM LOAD
1000 WATTS @ 4 OHMS, MONO BRIDGE
4 OHM MINIMUM LOAD
CHANNEL | SPEAKER | CHANNEL |
B | A |
OUTPUTS
23 | 24 | 25 |
23.CIRCUIT BREAKER: The B4R employs an AC line circuit breaker to help protect against damage due to excessive cur- rent demands. If the amplifier stops working, check the circuit breaker. If it has opened, the button will be protruding and showing a contrasting color. You can reset the circuit breaker by pushing it in until it latches. The breaker must cool down for a short time before the button will latch. If the circuit breaker opens repeatedly, have the amplifier checked by a qualified service person.
24.AC LINE IN: Firmly insert the supplied AC power cord into this socket until it is fully seated. Plug the male end of the cord into a grounded AC outlet. DO NOT DEFEAT THE GROUND PRONG OF THE AC PLUG!
25.SPEAKER OUTPUTS: The 1/4” jacks offer a convenient method of connecting to speaker cabinets using cables termi- nated with 1/4” plugs. However, when using the amplifier at or near its full output power, using the
26.FULL RANGE/BIAMP: This switch determines how the signal is sent to the internal amplifiers. In the Full Range posi- tion (switch out), a full range signal is sent to both amp chan-
nels. In the Biamp position (switch in), the low frequencies are sent to Channel A and the high frequencies are sent to Channel B. (See pages 8 and 9.)
NOTE: When Biamping, the Stereo/Mono switch (#27) must be set to Stereo. (See pages 8 and 9.)
27.STEREO/MONO: This switch sets the operating mode of the amplifier. In the “out” position the amplifier is in the Stereo Mode; with the switch in the “in” position the amplifier is in the Mono Bridged Mode. (See pages 8 and 9.)
28,30. POWER AMP INPUTS: These jacks connect directly to the power amp for use with external preamps. When using external sources, connect the OUTPUT of the sources to these jacks using shielded instrument cables to feed the sig- nals into the power amp sections. The internal signal is dis- connected when a plug is inserted. In the Mono Mode, Channel A = Input. In the Biamp Mode, Channel A = Low Input, Channel B = High Input. (See pages 8 and 9.)
29,31. PREAMP OUTPUTS These jacks are direct preamp outputs for use with external power amplifiers, mixing boards, external effects, etc. Connect the external unit inputs to these jacks using shielded instrument cables.
Speakon® is a registered trademark of Neutrik AG.
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