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14. ACLINEIN:Use the supplied power cord to
connect the amplifier to a suitable source of A.C.
voltage. This is a grounded, three-wire cord and
must be connected to a properly grounded outlet.
DONOT attempt to defeat the ground connec-
tion of the power cord!See the serial number
label for power ratings.
15.FUSE: This protects the amplifier from damage
to overload conditions or power line surges. If the
fuse blows, replace it only with the same size and
type.
16. BIASSELECT:Allows for instant bias adjust-
ment when the TYPEof output tube is changed.
The setting of this switch mustmatch the type of
tube being used! The amplifier is shipped with 6L6
tubes installed.
17. SPEAKERS:Connect the amplifier to the inter-
nal speaker and/or an extension speaker cabinet
using these jacks. Use heavy duty speaker cables
terminated with the proper connectors. The total
speaker impedance can not be less than 4 ohms.
(Be sure to match the Impedance Selector switch
[18] to the cabinet impedance.) The B-15Rs cabi-
net impedance is rated at 8 ohms.
18. IMPEDANCESELECTOR: Use this switch to
match the amplifier to the TOTALimpedance of
your speaker cabinet(s).19. LINEOUT:Used with the Line In jack (20), this
may serve as an effects loop: The signal from this
jack would go to the input of the effect. Alternate
uses for this jack include providing an unbalanced
line level signal for connecting to an external
amplifier or mixing console. The signal at this jack
is affected by the Master control (10).
20. LINEIN:Used with the Line Out jack (19), this
may serve as an effects loop: The signal from this
jack would come from the output of the effect.
Alternate uses for this jack include providing a
means to tap directly into the internal power ampli-
fier, bypassing the input stages completely.
21. LINEOUTLEVEL:This controls the output
level of the signal at the Balanced Line Out jack
(24).
22.POST/PRESWITCH:This switch determines
whether or not the signal at the Balanced Line Out
jack (24) is affected by the settings of the tone and
master level controls. With the switch at the OUT
(Post) position, signal is affected; with the switch
IN (Pre), the signal is not affected.
2 3 .L I F T / G N DS W I T C H :This switch lifts the
ground of the Balanced Line Out jack (24) at the IN
position. Engage this switch only if there is exces-
sive buzzing or hum coming from the amplifier due
to ground loops.24.BALANCEDLINEOUT:This jack provides a
balanced line level signal for connecting to a mix-
ing console, recording device or external amplifier.
2 5 .H I G HF R E Q U E N C YAT T E N U ATOR: T h i s
three position rotary switch controls the output
level of the internal high frequency driver. Use the
tip of a flatblade screwdriver to set this switch to
the setting which best suits your tastes.
26. FULLRANGEINPUTS: These are the input
jacks for the cabinet. Connect one of these jacks to
the Speaker output of the amplifier; the other jack
may be used to carry the amp signal to an exten-
sion cabinet if desired.32
B-15R rear panel:Technical Specifications:OUTPUT POWER RATING100 watts @ 5%THD, 8 ohm load, 120VAC
SPEAKERSIZEANDRATINGAmpeg Vintage 15, 8 ohm, 150 watt, 2 voice coil, 56 oz magnet High Efficiency Piezo Tweeter, 8 ohm, 150 watt (w/network)CROSSOVERFREQUENCY3kHz ULTRAHIGH SWITCH6dBBoost @ 4kHzULTRALOW SWITCH10dBBoost @ 40HzBASS CONTROL25dBRange @ 40HzMID CONTROL34dBRange @ 200, 400, 900, 1.5k or 2.5kHzTREBLE CONTROL30dBRange @ 4kHzINPUT IMPEDANCE0dB: 3M ohms; -15dB: 47k ohmsMAX.INPUTSIGNALLEVELACCEPTED0dB: 1V RMS; -15dB: 5.75V RMS TOTALSYSTEMGAIN50dB w/tones flat, Ultra Low and Ultra High offSIGNALTONOISERATIO90dBPOWER REQUIREMENTS120VAC, 60Hz, 400VA; 100VAC, 50/60Hz, 400VA; 230VAC, 50/60Hz, 400VA
DIMENSIONS 24W x 16-1/2D x 24-1/4H w/amp flipped inside, w/out caster board3 2 - 7 / 8 H w/amp flipped out, w/out caster board; 37-1/4 H w/caster boardWEIGHT:117 lbs
