Fender 57 owner manual Vacuum Tubes, Rear Panel, Specifications

Vacuum Tubes

Replace tubes only with same type and rating as specified. Please visit the Accessories area of the Fender website at: www.fender.com

Rear Panel

I.ELECTRIC LINE CORD—Connect to a grounded A/C outlet in accordance with the voltage and frequency ratings specified for your amplifier.

J.INTERNAL SPEAKER JACK—Plug-in connection for the 8Ω internal speaker. A speaker must always be connected at this jack when the amplifier is ON. A speaker impedance load of 8Ω should be used to avoid distortion or damage to the amplifier. When using only the internal speaker jack, a speaker impedance load of 8ohms (minimum) should be used to avoid distortion or damage to the amplifier.

K.EXTENSION SPEAKER OUTPUT—Plug-in connection for an external speaker. This jack is wired in parallel with the INTERNAL SPEAKER JACK {J} and affects the speaker impedance load. Use 8Ω minimum total. To use the external speaker output, first disconnect the internal speaker. Then connect a 16ohm speaker load (minimum) to the internal speaker jack and another 16ohm speaker load (minimum) the external speaker jack.

Tube locations left to right at rear:
5	6	6	12	12
Y	V	V	A	A
3	6	6	X	X
GT	GT	GT	7	7
			A	A*

*For original low-gain 1957 sound, substitute a 12AY7 for this preamp tube.

Specifications

TYPE:		PR 728
PART NUMBERS:		8150500000 (120V~, 60Hz)	8150503000 (240V~, 50Hz) AUS
		8150504000 (230V~, 50Hz) UK	8150506000 (230V~, 50Hz) EUR
POWER REQUIREMENT:		8150507000 (100V~, 50/60Hz) JPN
		85 W
INPUT IMPEDANCE:		Microphone 1 and Instrument 1: 1MΩ
OUTPUT IMPEDANCE:		Microphone 2 and Instrument 2: 136kΩ
		8Ω
POWER AMP OUTPUT:		12.5W into 8Ω @ < 5% THD, 1kHz
SPEAKER:		8Ω, 12", Jensen® P-12Q AlNiCo
DIMENSIONS:	HEIGHT:	16.75 in (43 cm)
	WIDTH:	20 in (51 cm)
WEIGHT:	DEPTH:	9.5 in (24cm)
		25 lb (11.5 kg)

Product specifications are subject to change without notice.

◊ ◊