Fender 57 Custom Twin-Amp Mode D'emploi page 3

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 TUBES: Dual 5U4 rectifier tubes convert AC voltage
from the amplifier's power transformer into DC voltage re-
quired by the power (N) and preamp tubes (P). These should be
replaced only with identical rectifier tubes or those of compa-
rable rating and quality. If preferred, one rectifier tube may be
removed for a dirtier blues tone.
N. POWER TUBES: Dual 6L6 power tubes drive the power section
of the amplifier, and are matched and rated for high output.
These should only be replaced with identical power tubes or
those of comparable rating and quality.
TYPE PR 614
POWER Requirements: 270 watts
INPUT IMPEDANCE 1 MΩ (Bright input 1, Normal input 1)
SPEAKERS Two 12" Fender Special Design alnico by Eminence® (8Ω, PN 7708599000)
TUBES One pair 6L6 (power, PN 0059778200)
Two 5U4 (rectifier, PN 0030031000)
FUSE
F3A L 250V (100V-120V models)
ACCESSORIES Deluxe fitted cover (included, PN 7708614000)
DIMENSIONS
Width: 24.5" (62.2 cm)
WEIGHT 56 lbs. (25.5 kg)
All manuals and user guides at all-guides.com
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
Product specifications subject to change without notice.
O. SPEAKER OUTPUT JACK: The '57 Custom Twin-Amp's two inter-
nal speakers connect in parallel to this single jack. Alternately, the
internal speakers can be disconnected to allow use of an external
4-ohm speaker cabinet (40 watts minimum). To prevent damage
to the amplifier, one of these two configurations must be con-
nected when power is on.
P. PREAMP TUBES: Four preamp tubes drive the preamp section
of the amplifier. These consist of two high-gain 12AX7 preamp
tubes, and two 12AY7 preamp tubes for original-era lower-gain
tone for both the Bright and Normal channels. Alternately, two
more 12AX7 preamp tubes can be substituted for the two 12AY7
tubes to achieve higher gain. Note: For extra shielding against
electrical hum, two custom-made 1950s-spec steel tube shields are
installed on the first two preamp tubes (V1 and V2).
specialist at:
Output: 40 watts RMS into 4Ω @ 5%THD, 1kHz
136 kΩ (Bright input 2, Normal input 2)
Two 12AX7 (preamp, PN 0070228000, 0013341400)
F1.6A L 250V (220V-240V models)
Height: 20.5" (52.1 cm)
Two 12AY7 (preamp, PN 7708740000)
Depth: 10.88" (27.6 cm)
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