Ampeg Portaflex Series - PF-20 T Technical Specifications & Block Diagram

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PF-20T / PF-50T Bass Guitar Amplifier
PF-20T Technical Specications & Block Diagram
Preamp All-tube 2 x 12AX7
Power Amp All-tube 2 x 6V6
Output Power Rating 20 Watts @ 8 Ω, 10% THD
20 Watts @ 4 Ω, 10% THD
Signal to Noise Ratio 60 dB (20 Hz–20 kHz, unweighted)
Maximum Gain Input: 54 dB
Tone Controls Bass: +8/–12 dB @ 50 Hz
Midrange: +5/–15 dB @ 550 Hz
Treble: +13/–20 dB @ 4 kHz
Power Requirements 120VAC, 60 Hz, 50W
100VAC, 50-60 Hz, 50W
220-240VAC, 50-60 Hz, 50W
Size (H x W x D) 7.3 in x 13.0 in x 10.4 in
185 mm x 330 mm x 264 mm
Weight 15.2 lb / 6.9 kg (approximately)
0dB INPUT
GAIN
BASS TREBLE
12AX7
12AX7
12AX7
PF-20T
MID
12AX7
MASTER
BALANCED
LINE OUT
PRE/POST
6V6
6V6
8 OHM
SPEAKER
OUTPUT 20W
TRANSFORMER
LINE OUT
GROUND LIFT
4 OHM
GROUND LIFT