Ampeg PF-350: A versatile bass guitar amplifier head that delivers 350 watts of power, capable of producing rich and powerful tones for a variety of playing styles. It features a 3-band EQ, limiter switch, and an ultra-low and ultra-high frequency boost, allowing for precise tone shaping. With its XLR line output, you can connect to a mixer or recording interface for live or studio use. The PF-350 also includes an effects loop for integrating external effects pedals or processors, giving you even more creative possibilities.
Ampeg PF-350: A versatile bass guitar amplifier head that delivers 350 watts of power, capable of producing rich and powerful tones for a variety of playing styles. It features a 3-band EQ, limiter switch, and an ultra-low and ultra-high frequency boost, allowing for precise tone shaping. With its XLR line output, you can connect to a mixer or recording interface for live or studio use. The PF-350 also includes an effects loop for integrating external effects pedals or processors, giving you even more creative possibilities.
PF-350, PF-500, PF-800
Quick Start Guide
2
Parallel Setup
Daisy Chaining
Speaker Cabinet A
Speaker Cabinet A
Speaker Cabinet
Speaker Cabinet B
Speaker Cabinet B
PF-350/PF-500/PF-800
PF-350/PF-500/PF-800
PF-350/PF-500/PF-800
XLR line
out
pre-EQ
post-EQ
send
return
tuner outpwr amp in pre amp out
patch
power
LIFT
GND
-40dB
0dB
ft switch
speaker outputs
CLASS 2 WIRING
fx loop
HIGH
FREQUENCY
ATTENUATOR FULL RANGE
INPUTS
OFF –6 0
PF-xxx
XLR line
out
pre-EQ
post-EQ
send
return
tuner outpwr amp in pre amp out
patch
power
LIFT
GND
-40dB
0dB
ft switch
speaker outputs
CLASS 2 WIRING
fx loop
HIGH
FREQUENCY
ATTENUATOR FULL RANGE
INPUTS
OFF –6 0
PF-xxx
HIGH
FREQUENCY
ATTENUATOR FULL RANGE
INPUTS
OFF –6 0
PF-xxx
XLR line
out
pre-EQ
post-EQ
send
return
tuner outpwr amp in pre amp out
patch
power
LIFT
GND
-40dB
0dB
ft switch
speaker outputs
CLASS 2 WIRING
fx loop
HIGH
FREQUENCY
ATTENUATOR FULL RANGE
INPUTS
OFF –6 0
PF-xxx
HIGH
FREQUENCY
ATTENUATOR FULL RANGE
INPUTS
OFF –6 0
PF-xxx
What’s in the Box
PF-350, PF-500, or PF-800 Amplifier, Power Cable, Quick Start Guide.
Hookup Diagrams
Standard Setup
Note: Use same impedance cabinets in parallel setups and when daisy-chaining
3
Front & Rear Panels
thresh
input
-15dB ultra lo
mute ultra hi
gaincompression bass midrange frequency treble volumefx mix
peak
mute
31 2 4 5
audio
in phones
PF 500
PF 800
0 100 100 100 100 100 10 0 10
fault
1210
3
3 11
7
123
8
13 5
49
XLR line
out
pre-EQ
post-EQ
300 W @ 8Ω 500W @ 4Ω MIN LOAD [PF-500]
400 W @ 8Ω 800W @ 4Ω MIN LOAD [PF-800]
send
return
tuner outpwr amp in pre amp out
patch
power
LIFT
GND
-40dB
0dB
ft switch
speaker outputs
CLASS 2 WIRING
fx loop
PF 800
PF 500
19
16
17
18
20
15
14
input pad
-15dB
bassgain midrange treble volume limiter
audio
in phones
PF 350
peak limit
0 100 100 100 100 10
fault
1 2 7 89
5
4 6
4
Front & Rear Panel Descriptions
1. 1/4" Input: Connect a passive or active instrument to the Input jack.
2. Pad/Mute: Pad reduces input volume by 15 dB. Mute will mute the signal completely.
3. Gain/Peak LED: The Gain knob adjusts the signal sent to the preamplifier. The Peak LED indicates
when the input signal is too high.
4. EQ Knobs: Boost or cut the level at certain frequencies to enhance the sound.
5. Volume: Adjusts the output level to Speaker Outputs and the preamp level sent to the Phones output.
6. Limiter Switch: Turns the Limiter function on/off.
7. Fault LED: Glows amber if the amp has a fault or is in thermal protect mode.
8. Audio Input: Connect a line level source for playback through the Phones output.
9. Phones Output: Combination playback of the 1/4" Input and Audio In input.
10. Compression: Controls the amount of compression applied to the input signal.
11. Ultra Hi/Ultra Lo Switches: Enhance the high and/or low frequencies.
12. Frequency Select Knob: Selects the frequencies affected by the Midrange EQ knob.
13. FX Mix Knob: Adjusts the amount of FX combined with the input signal.
14. Power: Input socket for power cable, switch for local AC voltage selection, and power on and off.
15. Speaker Outputs: Combination Speakon® - 1/4" TS outputs for connecting speaker cabinets.
16. Foot Switch Input: Control the Mute and FX functions using a footswitch.
17. XLR Line Output: Feeds an external mixer or recording device.
18. Patch Input/Output: Pwr Amp In bypasses the internal preamp. Pre Amp Out feeds an external
amplifier or powered speaker.
19. Tuner Output: Feeds an external tuner.
20. FX Loop Send/Return: Connect the input and output of an external FX processor.
Getting Started
1. Read and understand the included “Important Safety Instructions.”
2. Make sure the Power switch is off before making any connections.
3. 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.
4. Connect an instrument to the PF-350/PF-500/PF-800 Input jack with a 1/4" (shielded) instrument cable.
Connect (unshielded) speaker cables to speaker cabinets with Speakon or 1/4” TS ends, depending on
model.
5. With the Gain and Volume controls fully off, turn the amplifier on by pressing the Power switch to the On
position.
6. While playing the instrument, adjust the Gain and Volume knobs to the preferred level.
7. Adjust the EQ knobs to taste.
5
PF-350 PF-500 PF-800
Output Power Rating 250W RMS @ 8 (5% THD)
350W RMS @ 4 (5% THD)
300W RMS @ 8 (3% THD)
500W RMS @ 4 (3% THD)
400W RMS @ 8 (3% THD)
800W RMS @ 4 (3% THD)
Maximum Gain 64 dB 69 dB 71 dB
Power Requirements ~100-120V AC, 50-60 Hz, 100W
~200-240V AC, 50-60 Hz, 100W
~100-120V AC, 50-60 Hz, 125W
~200-240V AC, 50-60 Hz, 125W
~100-120V AC, 50-60 Hz, 200W
~200-240V AC, 50-60 Hz, 200W
Size (H x W x D) 2.7 x 10.8 x 10.7 in
69 x 275 x 272 mm
3.1 x 14.0 x 10.8 in
80 x 355 x 272 mm
3.1 x 15.0 x 10.8 in
80 x 355 x 272 mm
Weight 7.8 lb / 3.5 kg 11.0 lb / 5.0kg 11.8 / 5.4 kg
All specifications subject to change
Technical Specifications
WARRANTY AND SUPPORT
Visit WWW.AMPEG.COM to...
(1) ...identify WARRANTY coverage provided in your local market. Please keep your sales receipt in a
safe place.
(2) ...retrieve a full-version, printable OWNER’S MANUAL (English only) for your product.
(3) ...REGISTER your product.
(4) ...CONTACT Technical Support, or call 818-575-3600.
www.ampeg.com
Yamaha Guitar Group, Inc.
26580 Agoura Road, Calabasas, CA 91302-1921 USA
Part No. 40-00-0535 Rev. B
© 2021 Yamaha Guitar Group, Inc. All rights reserved.
Ampeg and Portaflex are trademarks or registered trademark of Yamaha Guitar Group, Inc. in the U.S. and/or other jurisdictions. Speakon is a
registered trademark of Neutrik AG Corporation.
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, ⃝A, L, and ■V are shown below.
Symbol indicating relative fusing time / current characteristics T: Time lag type, F: Fast-acting type.
⃝A: Rated current.
Symbol indicating the blocking capacity L: Low cutoff capacity, E: Medium cutoff capacity, H: High cutoff capacity.
■V: Rated voltage.
Supplier's Declaration of Conformity
47 CFR § 2.1077 Compliance Information
Unique Identifier: Ampeg PF-350, PF-500, and PF-800
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.
Serial Number: _________________________
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Ampeg PF-350: A versatile bass guitar amplifier head that delivers 350 watts of power, capable of producing rich and powerful tones for a variety of playing styles. It features a 3-band EQ, limiter switch, and an ultra-low and ultra-high frequency boost, allowing for precise tone shaping. With its XLR line output, you can connect to a mixer or recording interface for live or studio use. The PF-350 also includes an effects loop for integrating external effects pedals or processors, giving you even more creative possibilities.
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