PF-20T and PF-50T
Bass Guitar Amplifiers
Owner’s Manual
PF-20T / PF-50T Bass Guitar Amplifier
IMPORTANT SAFETY INSTRUCTIONS
1.Read these instructions.
2.Keep these instructions.
3.Heed all warnings.
4.Follow all instructions.
5.Do not use this apparatus near water.
6.Clean only with a dry cloth.
7.Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
8.Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
9.Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding-type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.
10.Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.
11.Only use attachments/accessories specified by the manufacturer.
12. Use only with a cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.
WARNING — To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture.
Laite on liitettävä suojakoskettimilla varustettuun pistorasiaan.
Apparatet må tilkoples jordet stikkontakt.
Apparaten skall anslutas till jordat uttag.
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13. Unplug this apparatus during lightning storms or when unused for long periods of time.
14. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.
15. This apparatus shall not be exposed to dripping or splashing, and no object filled with liquids, such as vases or beer glasses, shall be placed on the apparatus.
16. Do not overload wall outlets and extension cords as this can result in a risk of fire or electric shock.
17. This apparatus has been designed with Class-I construction and must be connected to a mains socket outlet with a protective earthing connection (the third grounding prong).
18. The MAINS plug or an appliance coupler is used as the disconnect device,
so the disconnect device shall remain readily operable.
19. For the terminals marked with symbol of “ ” may be of sufficient magnitude
to constitute a risk of electric shock. The external wiring connected to the terminals requires installation by an instructed person or the used of ready-made leads or cords.
CAUTION |
RISK OF ELECTRIC SHOCK! DO NOT OPEN! |
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT |
REMOVE COVER (OR BACK). NO USER-SERVICEABLE PARTS INSIDE. |
REFER SERVICING TO QUALIFIED PERSONNEL. |
The lightning flash with arrowhead symbol within an equilateral triangle means “electric shock hazard”. It is intended to alert the user to the presence of uninsulated “dangerous” voltage within the product enclosure, that may be of significant magnitude to constitute a risk of electric shock to persons.
The exclamation point within an equilateral triangle means “Warning/Caution!”. It is intended to alert the user of the presence of important operating and maintaining (servicing) instructions in the literature accompanying the appliance.
PF-20T / PF-50T Bass Guitar Amplifier
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on,
the user is encouraged to try to correct the interference by one or more of the following measures:
•Reorient or relocate the receiving antenna.
•Increase the separation between the equipment and the receiver.
•Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
•Consult the dealer or an experienced radio/TV technician for help.
CAUTION: Changes or modifications to this device not expressly approved by LOUD Technologies Inc. could void the user’s authority to operate the equipment under FCC rules.
This apparatus does not exceed the Class A/Class B (whichever is applicable) limits for radio noise emissions from digital
apparatus as set out in the radio interference regulations of the Canadian Department of Communications.
Exposure to extremely high noise levels may cause permanent hearing loss. Individuals vary considerably in susceptibility to noise-induced hearing loss, but nearly everyone will lose some hearing if exposed to sufficiently intense noise for a period of time. The U.S. Government’s Occupational Safety and Health Administration (OSHA) has specified the permissible noise level exposures shown in the following chart.
According to OSHA, any exposure in excess of these permissible limits could result
in some hearing loss. To ensure against potentially dangerous exposure to high sound pressure levels, it is recommended that all persons exposed to equipment capable of producing high sound pressure levels use hearing protectors while the equipment is in operation. Ear plugs or protectors in the ear canals or over the ears must be worn when operating the equipment in order to prevent permanent hearing loss if exposure is in excess of the limits set forth here:
Duration, per |
Sound |
Typical Example |
day in hours |
Level dBA, Slow |
|
|
Response |
|
8 |
90 |
Duo in small club |
6 |
92 |
|
4 |
95 |
Subway Train |
3 |
97 |
|
2 |
100 |
Very loud classical music |
1.5 |
102 |
|
1 |
105 |
The boss screaming at his minions about manual deadlines |
0.5 |
110 |
|
0.25 or less |
115 |
Loudest parts at a rock concert |
Correct disposal of this product: This symbol indicates that this product should not be disposed of with your household waste, according to the WEEE directive (2012/19/EU) and your national law. This product should be handed over to an authorized collection site for recycling waste electrical and electronic equipment (EEE). Improper handling of this type of waste could have a possible negative impact on the environment and human health due to potentially hazardous substances that are generally associated with EEE. At the same time, your cooperation in the correct disposal of this product will contribute to the effective usage of natural resources. For more information about where you can drop off your waste equipment for recycling, please contact your local city office, waste authority, or your household waste disposal service.
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PF-20T / PF-50T Bass Guitar Amplifier |
|
TABLE OF CONTENTS |
|
Important Safety Instructions............................................... |
2-3 |
Table Of Contents.................................................................. |
4 |
Introduction........................................................................... |
4 |
PortaFlex Series Features...................................................... |
5 |
PortaFlex Series Front Panel Features..................................... |
6 |
PortaFlex Series Rear Panel Features................................... |
7-8 |
Some Suggested Settings...................................................... |
9 |
Favorite Settings................................................................. |
10 |
Changing the Tubes............................................................. |
11 |
Setting Tube Bias................................................................ |
12 |
PF-20T Technical Specifications and Block Diagram............... |
13 |
PF-50T Technical Specifications and Block Diagram............... |
14 |
Service Information.............................................................. |
15 |
Introduction
The Portaflex series bass amplifiers brought legendary Ampeg tone in powerful lightweight design that bass players around the world, from beginners to professionals, have made the most popular bass amplifiers in history. The PF-20T and PF-50T deliver legendary Ampeg all-tube tone and warmth in the same portable, powerful and affordable design.
Designed to be compact and match perfectly with existing Portaflex cabinets, the PF-20T and PF-50T are perfect for small to medium sized shows, studio recording or even a rehearsal studio. Combined with the PF-112HLF compact cabinet, you have the ultimate portable tone powerhouse.
Like all Ampeg products, your Portaflex series bass amplifier is designed by musicians and built using only the best of components. Each amp is tested to confirm that it meets our specifications, and we believe that this amp is the absolute best that it can be.
In order to get the most out of your new amp, please read this manual before you begin playing. Best of luck in all of your musical endeavors!
And thank you for choosing Ampeg.
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PF-20T / PF-50T Bass Guitar Amplifier
PortaFlex PF-20T / PF-50T Features:
•RMS power output:
20W @ 4 or 8 ohms [PF-20T]
50W @ 4 or 8 ohms [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]
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