Ampeg manual The Rear Panel, Defeat The Ground Prong Of The Ac Plug, B2/B2R Bass Amplifier

B2/B2R Bass Amplifier

The Rear Panel

MODEL:	B2R
SERIAL:	Q2ZZ650022
LINE:	120	V ~ 60	Hz
WATTS:		MAX

14 15 16 17 18 19 20 21 22 23 24

14.FAN: This temperature controlled, vari- able speed fan draws cool air into the amplifier, which forces heat out through the exhaust vents. Never block the vent holes or the fan opening.

15.FUSE: This protects the unit from dam- age due to overload conditions or power line surges. If the fuse blows, replace it only with the same size and type.

16.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!

17.SPEAKER OUTPUTS: Use these jacks to connect the amplifier to your speaker(s) using cables terminated with 1/4” connectors. For the B2 combo, use the supplied speaker cable to connect the out- put of the amplifier to the speaker jack. An extension speaker with an impedance of 8 ohms or higher may be connected and allows the amplifier to deliver its maximum power.

NOTE: In some areas 1/4” jacks are not acceptable for use as extension speak- er jacks. For this reason the 1/4” jacks on your amplifier may be factory-sealed. In such cases use the Speakon® jack to connect to external speaker cabinets.

For the B2R, connect the output(s) using high quality speaker cables.

NOTE: When connecting multiple speaker cabinets to the B2/B2R, keep the overall impedance at or above four ohms! The following chart shows the total impedance load when connecting speaker cabinets in parallel:

Cabinet	# of	Total
Impedance	Cabs	Impedance
8Ω	2	4Ω
16Ω	2	8Ω
16Ω	4	4Ω

18.POWER AMP IN: This mono jack allows you to feed the preamp output of another amplifier to the input of the B2/B2R’s internal power amp. This bypass- es the preamp circuitry of the B2/B2R.

WARNING: This jack goes directly into the power amplifier. DO NOT connect high level signals to it!

19.PREAMP OUT: A post-EQ signal may be taken from this jack and sent to the house mixing board, recording console or external power amplifier.

20.EFFECTS RETURN: To use an exter- nal effects device, connect the OUTPUT of the device to this jack by means of a shield- ed cable. This feeds the processed signal into the Master section of the B2/B2R.

21.EFFECTS SEND: Connect the output from this jack to the INPUT of your effects by means of a shielded cable. This sends a post-EQ signal to your effects.

22.-20dB SWITCH : This switch adjusts the output level at the Balanced Line Output jack (#24). The control works inde- pendently from the front panel Master con- trol. Depressing the switch activates the 20dB pad. The result is a signal that is more compatible with the microphone inputs on a mixer.

23.PRE/POST SWITCH: You can select either Pre or Post EQ for the signal at the Balanced Out jack (#24) with this switch. With the switch in the OUT position, the signal at the jacks will be Pre-EQ. This is a direct output not affected by any EQ or boost settings. With the switch depressed, the signal is Post-EQ and is controlled and modified by the tone controls, Graphic EQ, and Effects Loop.

24.BALANCED OUTPUT: This XLR-type connector supplies a balanced preamp out- put signal for connecting to a house mixing board, recording console or external ampli- fiers with balanced inputs. The signal can be set to Pre or Post EQ by the back panel Pre/Post switch (#23). The level can be adjusted for either mic or line type inputs using the -20dB switch (#22).

Speakon® is a registered trademark of Neutrik USA

5