Chassis Rear View; Specifications - Fender ’57 Custom Pro-Amp Owner's Manual

L. POWER CORD: Connect to a grounded outlet in accordance
with the voltage and frequency specifications noted on the
amplifier information label, which is located inside the cabinet
on the left when viewing from the rear.
M. RECTIFIER TUBE: Single 5AR4 rectifier tube converts AC voltage
from the amplifier's power transformer into DC voltage required
by the power (N) and preamp tubes (Q). It should be replaced
with an identical rectifier tube or one with a comparable rating
and quality, although a 5U4 rectifier tube can be substituted to
produce lower-gain tone typical of the original era.
N. POWER TUBES: Dual 6L6GC power tubes drive the power sec-
tion of the amplifier. These should be replaced only with identi-
cal power tubes or those with a comparable rating and quality.
O. INTERNAL SPEAKER JACK: The '57 Custom Pro-Amp's single
internal speaker connects here using a right-angle plug. A single
external speaker can also be used instead of the internal speaker
(note that this requires disconnection of the internal speaker), but
it must be rated at 8 ohms and it must be connected to this jack
and not to the Extension Speaker Jack (P).
TYPE
POWER
IMPEDANCE
SPEAKER
TUBES
FUSE
ACCESSORIES
DIMENSIONS
WEIGHT

Chassis Rear View

Rear panel, tube cage, preamp tube shields and other parts removed for illustration.
For questions and troubleshooting, contact a Fender
1-800-856-9801 (U.S. toll free)
1-480-596-7195 (International)

Specifications

PR 2515
Requirements: 225 watts
1 MΩ (instrument input 1, microphone input 1)
One 15" Eminence® Legend (8Ω, PN 0059660000)
One pair 6L6GC (power, PN 0059778200)
One 5AR4 (rectifier, PN 0041400000)
F3.0A L 250V (100V-120V versions), F1.6A L 250V (220V-240V versions)
Deluxe fitted cover (included, PN 7708571000)
Width: 22.37" (56.83 cm)
51 lbs. (23.13 kg)
Product specifications subject to change without notice.
Also note that the amp can be damaged by using a single ex-
ternal speaker plugged into the Extension Speaker Jack (P) with
nothing plugged into the Internal Speaker Jack. Whether internal
or external, an 8-ohm speaker must be connected to the Internal
Speaker Jack when the power is on, or the amplifier can be dam-
aged.
P. EXTENSION SPEAKER JACK: This speaker jack enables the use
of an external 8-ohm speaker in addition to the internal speaker.
Also, two external 8-ohm speakers can be used by plugging them
into the Internal (O) and Extension Speaker jacks (note that this re-
quires disconnection of the internal speaker, and that the custom
transformer will switch to 4-ohm operation when both jacks are
used). Also note that the amp can be damaged by using a single
external speaker plugged into the Extension Speaker Jack with
nothing plugged into the Internal Speaker Jack (O).
Q. PREAMP TUBES: Dual 12AX7 preamp tubes (high gain) and a
single 12AY7 preamp tube (for lower-gain tone typical of the
original era) drive the preamp section of the amplifier. Alternate-
ly, another 12AX7 preamp tube can be substituted for the 12AY7
tube to achieve higher gain.
specialist at:
Output: 26 watts RMS into 8Ω @ 5% THD, 1kHz
136 kΩ (instrument input 2, microphone input 2)
Two 12AX7 (preamp, PN 0074287300)
Height: 20.87" (53.02 cm)
One 12AY7 (preamp, PN 7708740000)
Depth: 10.87" (27.62 cm)
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