Ampeg PF-20T Portaflex Bass Amplifier Head User Guide
- June 6, 2024
- ampeg
Table of Contents
PF-20T and PF-50T
Quick Start Guide
What’s in the Box
PF-20T or PF-50T Amplifier, Power Cable, and Quick Start Guide.
Hookup Diagrams
Standard Setup
PA/Recording Setup
Daisy Chaining
Note : Use same impedance cabinets when daisy-chaining.
Front & Rear Panels
Front & Rear Panel Descriptions
- 0 dB Input: Connect a passive instrument to this Input jack.
- –15 dB Input: Connect an active instrument to this Input jack.
- Gain: The Gain knob adjusts the signal sent to the preamplifier.
- Ultra Hi / Ultra Lo Switches: Boosts high or low frequencies.
- EQ Knobs : Boost or cut the level at certain frequencies to enhance the sound.
- Frequency Select Knob: Selects the frequencies affected by the Midrange EQ knob.
- Volume: Adjusts the overall output level.
- Power Switch: Turns the power on/off.
- Standby Switch: Turns the Standby on and off.
- Power Connector: Input socket for the power cable.
- Fuse: Overload and AC line surge protection.
- Bias: Controls and LEDs for user biasing.
- Pre / Post Switch: Set the Balanced Out jack to Pre-EQ [engaged] or Post-EQ [disengaged].
- Preamp DI Out : Feeds an external mixer or recording device.
- Lift / Gnd: Connects the ground connection at the Balanced Line Out jack.
- Transformer Balanced DI Output: Feeds an external mixer or recording device.
- Speaker Output : 1/4″ TS output jack for connecting an external speaker cabinet.
- Impedance Selector : Match the output impedance of the amp to the speaker(s).
Getting Started
- Read and understand the included “Important Safety Instructions.”
- Make sure the power switch is off before making any connections.
- Push the line cord securely into the amplifier’s IEC connector and plug the other end into a grounded AC outlet. The amplifier may accept the appropriate voltage as indicated near the IEC connector.
- Connect an instrument to the input jack with a 1/4″ instrument cable. Connect (non-shielded) speaker cables to speaker cabinets with 1/4″ TS.
- Make sure the Standby switch is down [on].
- With all volume controls fully off, turn the amplifier on by pressing the power switch to the on position. Wait 30 seconds.
- Move the Standby switch up [off].
- While playing the instrument, adjust the Gain and Volume knob to the preferred level.
- Adjust the EQ knobs to taste.
Technical Specifications
| PF-20T| PF-50T
---|---|---
Output Power Rating| 20W @ 8 (10% THD)
20W @ 4 (10% THD)| 50W @ 8 (10% THD)
50W @ 4 (10% THD)
Maximum Gain| 54 dB| 66 dB
Power Requirements| 120V AC, 60 Hz, 50W
100V AC, 50-60 Hz, 50W
220-240V AC, 50-60 Hz, 50W| 120V AC, 60 Hz, 90W
100V AC, 50-60 Hz, 90W
220-240V AC, 50-60 Hz, 90W
Size (H x W x D)| 7.3 x 13.0 x 10.4 in
185 x 330 x 264 mm| 7.3 x 13.9 x 10.4 in
185 x 353 x 264 mm
Weight| 15.2 lb / 6.9 kg| 19.4 lb / 8.8 kg
All specifications subject to change.
WARRANTY AND SUPPORT
Visit WWW.AMPEG.COM to…
- …identify WARRANTY coverage provided in your local market. Please keep your sales receipt in a safe place.
- …retrieve a full-version, printable OWNER’S MANUAL (English only) for your product.
- …REGISTER your product.
- …CONTACT Technical Support, or call 818-575-3600.
Supplier’s Declaration of Conformity
47 CFR § 2.1077 Compliance Information
Unique Identifiers: Ampeg PF-20T and PF-50T
Responsible Party – U.S. Contact Information:
Yamaha Guitar Group, Inc.
26580 Agoura Road
Calabasas, CA 91302-1921
818-575-3600
https://ampeg.com/
FCC Compliance Statement:
This device complies with Part 15 of the FCC Rules. Operation is subject to
the following two conditions: (1) This device may not cause harmful
interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
There are various types of fuses, and replacing them with different types may
cause malfunction, electric shock, or fire. Be sure to confirm you are
replacing the correct fuse with electrical rating and specifications. Each
number and symbol represent the following:
Example: T3AL250V
T, 2 A,3 L, and 4
■V are shown below.
- A symbol indicating relative fusing time / current characteristics T: Time lag type, F: Fast-acting type.
- A: Rated current.
- A symbol indicating the blocking capacity L: Low cutoff capacity, E: Medium cutoff capacity, H: High cutoff capacity.
- ■V: Rated voltage.
© 2021 Yamaha Guitar Group, Inc. All rights reserved. Ampeg, the Ampeg logo, and Portaflex are trademarks or registered trademarks of Yamaha Guitar Group, Inc. in the U.S. and/or other jurisdictions.
Serial Number: _____
www.ampeg.com
Yamaha Guitar Group, Inc.
26580 Agoura Road, Calabasas, CA 91302-1921 USA
Part No. 40-00-0531 Rev. B
Documents / Resources
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Ampeg PF-20T Portaflex Bass Amplifier
Head
[pdf] User Guide
PF-20T, PF-50T, Portaflex Bass Amplifier Head
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