Ampeg Portaflex Series - PF-50 T Technical Specifications & Block Diagram

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PF-20T / PF-50T Bass Guitar Amplifier
PF-50T Technical Specications & Block Diagram
Preamp All-tube 2 x 12AX7
Power Amp All-tube 1 x 12AU7, 2 x 6L6
Output Power Rating 50 Watts @ 8 Ω, 10% THD
50 Watts @ 4 Ω, 10% THD
Signal to Noise Ratio 60 dB (20 Hz–20 kHz, unweighted)
Maximum Gain Input: 66 dB
Tone Controls Bass: +10/–10 dB @ 60 Hz
Midrange: +5/–20 dB @ 200 Hz, 400 Hz, 800 Hz
+5/–15 dB @ 1.6 kHz, 3 kHz
Treble: +13/–23 dB @ 4 kHz
Ultra Lo: +2 dB @ 50 Hz, –10 dB @ 500 Hz
Ultra Hi: +5 dB @ 8 kHz
Power Requirements 120VAC, 60 Hz, 90W
100VAC, 50-60 Hz, 90W
220-240VAC, 50-60 Hz, 90W
Size (H x W x D) 7.3 in x 13.9 in x 10.4 in
185 mm x 353 mm x 264 mm
Weight 19.4 lb / 8.8 kg (approximately)
12AX7
12AX7
-15dB INPUT
0dB INPUT
GAIN
BASS TREBLE
MID
MASTER
12AX7
12AU7
12AX7
12AU7
6L6GC
6L6GC
8 OHM
SPEAKER
OUTPUT 50W
PF-50T
ULTRA
LO
ULTRA
HI
MID
SELECT
PRE/POST
TRANSFORMER
LINE OUT
4 OHM
BALANCED
LINE OUT
GROUND LIFT
GROUND LIFT