Ampeg Portaflex Series User Manual

3
PF-20T / PF-50T Bass Guitar Amplifier
PF-20T / PF-50T Features
• RMS Power Output:
• 20W @ 4 or 8 Ω (PF-20T)
• 50W @ 4 or 8 Ω (PF-50T)
• Preamp: All-tube 2 x 12AX7
• Power Amp:
• All-tube 2 x 6V6 (PF-20T)
• All-tube 1 x 12AU7, 2 x 6L6 (PF-50T)
• 0 dB and -15 dB Inputs (PF-50T)
• Tone Controls: Bass, Mid, Treble
• Mid-tone Control: 5-position (PF-50T)
• Ultra Hi/Lo Boosts (PF-50T)
• Input Gain Control
• Preamp Balanced Line Out
• Pre/Post EQ
• Ground Lift
• Transformer Balanced Line Out
• Ground Lift
• No Speaker Load Required
• User-adjustable Bias Control
• Dimensions:
• 7.3 x 13.0 x 10.4 in / 185 x 330 x 264 mm (PF-20T)
• 7.3 x 13.9 x 10.4 in / 185 x 353 x 264 mm (PF-50T)
• Weight:
• 15.2 lb / 6.9 kg (PF-20T)
• 19.4 lb / 8.8 kg (PF-50T)

Ampeg Portaflex Series Specifications

General

Series	Portaflex
Type	Bass Amplifier
Power Output	Varies by model (e.g., 350W, 500W, 800W)
Speaker Configuration	Varies by model (e.g., 1x15", 2x10", 4x10")
Tube Preamp	Yes (on some models)
Solid State Power Amp	Yes (on some models)
EQ	Varies by model. Typically 3-band EQ (Bass, Mid, Treble). Some models have additional EQ controls.
Inputs	1 x Instrument
Outputs	Varies by model
Impedance	Varies by model (e.g., 4 ohms, 8 ohms)
Weight	Varies by model (e.g., 35 lbs, 65 lbs)
Dimensions	Varies by model
Tone Controls	Bass, Mid, Treble