Ampeg B1RE - Manual (Page 5)

5
The Rear Panel
MADE IN THE U.S.A. BY
SLM ELECTRONICS
1400 FERGUSON AVENUE
ST. LOUIS, MO 63133
RISK OF ELECTRIC SHOCK
DO NOT OPEN
AVIS: RISQUE DE CHOC ELECTRIQUE.
NE PAS OUVRIR.
WARNING: TO REDUCE THE RISK OF FIRE
OR ELECTRIC SHOCK, DO NOT EXPOSE THIS
EQUIPMENT TO RAIN OR MOISTURE.
CAUTION
175W @ 8 OHMS
300W @ 4 OHMS
#98689
13 12 20 22 14 15 16 21 19 18 17
12. 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.
13. 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.
14. AC LINE IN: The grounded power cord
should only be plugged into a grounded
power outlet that meets all applicable elec-
trical codes and is compatible with the volt-
age, power and frequency requirements
stated on the rear panel. Do not attempt
to defeat the safety ground connection!
15. SPEAKERS: Use these jacks to con-
nect the amplifier to your speaker(s) using
high quality speaker cables terminated with
1/4” connectors.
NOTE: When connecting multiple
speaker cabinets to the B1RE, keep the
overall impedance at or above four
ohms! The following chart shows the total
impedance load when connecting speaker
cabinets in parallel:
16. POWER AMP IN: This mono jack
allows you to feed the preamp output of
another amplifier to the input of the B1RE’s
internal power amp. This bypasses the pre-
amp circuitry of the B1RE.
WARNING: This jack goes directly into
the power amplifier. DO NOT connect
high level signals to it!
17. 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.
18. EFFECTS LOOP RETURN: To use an
external effects device, connect the OUT-
PUT of the device to this jack by means of
a shielded cable. This feeds the processed
signal into the Master section of the B1RE.
19. EFFECTS LOOP 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.
20. -20dB/0dB: This switch sets the output
level at the Bal. Out jack (#22). The control
works independently from the front panel
Master control. Depressing the switch
activates the 20dB pad. The result is a
signal that is more compatible with the
microphone inputs on a mixer.
21. POST/PRE: You can select either Pre
or Post EQ for the signal at the Bal. Out
jack (#22) 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 and Effects Loop.
22. BAL. OUT: This XLR-type connector
supplies a balanced preamp output signal
for connecting to a house mixing board,
recording console or external amplifiers
with balanced inputs. The signal can be set
to Pre or Post EQ by the back panel
Pre/Post switch (#21). The level can be
adjusted for either mic or line type inputs
using the -20dB/0dB switch (#20).
Cabinet # of Total
Impedance Cabs Impedance
8
Ω
2 4
Ω
16
Ω
2 8
Ω
16
Ω
4 4
Ω
WARNING: The speaker output of this unit can
exceed 10 Watts and could be a shock injury.
Connection to speakers should be performed by a
skilled person in compliance with local building
codes. Class 2 wiring is required for speaker
cables. Use of external speakers outside the rat-
ings stated at the speaker jack may result in a
shock injury or damage to the unit.
B1RE Bass Amplifier