Ampeg PF-50T Portaflex - 50-watt All-tube Bass Head

50-watt Tube Bass Amp Head with Normal and Padded Inputs, 3-band EQ, Selectable Mid Control, Ultra Hi/Lo Boosts, Line-out, and User Adjustable Bias
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Item ID: PF-50T
Ampeg PF-50T Portaflex - 50-watt All-tube Bass Head
Price:$1,299 and 99 cents
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Ampeg PF-50T Portaflex - 50-watt All-tube Bass Head
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Classic Ampeg Tube Tone

The PF-50T Portaflex 50-watt bass amplifier head puts the iconic tones of all-tube Ampeg amplifiers in a compact package, ideal for rehearsal, small gigs, and recording. You'll find 12AU7 and 6L6 tubes powering the amplifier, which conjures the warm tube sound associated with vintage Ampeg along with a pair of 12AX7 tubes in the preamp section. Weighing in at 19.4 lbs., the small size and light weight make transporting the PF-50T a piece of cake. And since it doesn't require a speaker load to run, this amp easily gets those tube tones on your recorded tracks without having a cab connected. Get vintage Ampeg tube tone in a lightweight package with the PF-50T.

Ampeg PF-50T Portaflex 50-watt Tube Bass Amplifier Head at a Glance:
  • All-tube Ampeg tone
  • Huge sound, convenient size
  • A great recording tool for players of all styles
All-tube Ampeg tone

Inside the power section of the PF-50T Portaflex bass head, you'll find a set of glowing 6L6 and 12AU7 tubes. Add to that dual 12AX7s in the preamp section and the all-tube design of this amplifier allows you to get that warm, harmonically rich tone Ampeg is known for, or push it hard to get an overdriven tube growl. So whether your ideal Ampeg tone is bringing Motown thump, or grabbing a pick and punching the front end of your amplifier as hard as you can, you'll fall in love with the tones in the Ampeg PF-50T Portaflex.

Huge sound, convenient size

Even with the diminutive size of the PF-50T Portaflex amp, you have all you need for getting huge tones through your cabinet, on your tracks, or both at the same time. The straightforward front panel makes dialing in your tones a snap, while the back panel offers XLR outputs for preamp out (with pre/post EQ switch) and transformer-balanced line-out. Its smaller footprint is easy to transport, and it sits beautifully on a recording desk or affixes to current Ampeg Flip-top cabinets. And the whole tube package is less than 20 lbs.

A great recording tool for players of all styles

One of the most useful features about the PF-50T Portaflex bass amp is its ability to run without a speaker load. Combining this with the preamp out (with pre/post EQ switch) and transformer-balanced line-out, you can optimize the PF-50T as a desktop unit for running direct and send your tube tone straight to your recording rig. The versatile EQ offers Bass, Mid, Treble with five different frequencies for the mid boost/cut: 200, 400, 800, 1.6 kHz, 3 kHz. The smaller size allows it to sit right on your studio desk within easy reach, and the black metal casing and glowing tubes look cool and classy.

Ampeg PF-50T Portaflex 50-watt Tube Bass Amplifier Head Features:
  • 50-watt tube bass amplifier head for small performance or recording
  • 6L6 and 12AU7 tubes offer classic Ampeg tone
  • Affixes to current Ampeg Flip-top cabinets
  • Compact footprint makes transportation easy
  • Features for direct recording
  • User adjustable bias control
  • Classic Ampeg front-panel controls
Get Ampeg's tube tone the easy way with the PF-50T Portaflex amplifier.

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Tech Specs

  • Type: Tube
  • Number of Channels: 1
  • Output Power: 50 Watts
  • EQ: 3-band, Mid Selector, Ultra Hi/Lo Boosts
  • Preamp Tubes: 2 x 12AX7
  • Power Tubes: 2 x 6L6, 1 x 12AU7
  • Inputs: 2 x 1/4"
  • Outputs: 1 x 1/4" (speaker), 2 x XLR (preamp, line)
  • Power Source: Standard IEC AC cable
  • Height: 7.3"
  • Width: 13.9"
  • Depth: 10.4"
  • Weight: 19.4 lbs.
  • Manufacturer Part Number: 99-026-1005

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Reviews

All tube all you've heard.
Man ,I love this amp along with the pf 115 lf cab. It'll shake anything loose at half gain lol. Randy Poteet is the Sales Engineer to top. Always done me right. Thanks again from your Cajun friend.
Ampeg PF-50T and Mesa Boogie Subway SW115 Bass Cab
Ampeg PF-50T
Mesa Boogie Subway SW115 Bass Cab
Focusrite 4i4
Aurelex SubDude

This rig performs as intended as a professional all tube studio and recording amp as well as a light band amp. Set on an Aurelex SubDude it dampens any sympathetic vibrations through the floor. I consider it an essential part of the kit.

I run DI from an XLR preamp out to a Focusrite 4i4. With passive Fenders it delivers the sounds of the analog 60s. The PF-50T is also pedal friendly for your favorite effects and tuner.

Recommended highly.
Great amp, no problems so far.
A while back (2016 or so), I had several bad experiences while looking for a vintage tube amp. Eventually I got tired of dealing with crackling pots, electronics gremlins, and amp techs — man, a good amp tech is hard to find. I bought an Ampeg PF-50t in 2018 as an ultimatum to myself. I wanted to stop wasting time on buying/selling amps and start playing more bass. The PF-50t was everything I wanted it to be. It sounds warm, clear, harmonic, and generally pleasant. I haven't noticed any loud humming or noise coming out of the amp. I also love the midrange EQ switch, as it makes the amp even more versatile. I love that it's possible to bias your own tubes with just a screwdriver and the LEDs on the back. The DI options are great, and the ability to use the amp without a cab connected is handy for recording.

Over the last 6-7 years, I haven't had much in the way of problems with this amp. Eventually I got a PF-115HE to pair with it as a fliptop, and it's a great match. I can't really see myself getting rid of this one, tbh.
Don’t try to reinvent the wheel
The Ampeg B 15 was the most recorded bass amp in pop music history. Every major recording studio owned one.
Now they are discontinued and very expensive to buy used. Besides who wants to maintain one.
Here is the answer for you guys.
I own one for my studio and can't be more happy.
Use your solid state lightweight amp for live shows.
Tube amps are the best for getting that warm punchy sound.
Music background: Music Producer
WOW
Tubes. There is NO substitute.
Hear from a Sales Engineer
What Do Our In-house Gear Experts Think?
Nick Church
As a bass player for more than 40 years, I was keen to see how the PF-50T compared to my all-time favorite bass head, the Ampeg V-4B. The PF-50T's front-end is like an SVT, and familiar controls such as Ultra-Hi and Lo buttons and a 5-way rotary-switched mid-range allowing me to quickly dial in a wide range of tone. I particularly like the addition of two DI outputs (one pre- and one post-EQ), which are useful for cab-less recording or running direct onstage in the praise band. I've found the PF-50T powerful enough for small to medium gigs, and the dual-input tone stack handles passive and active basses, without compromise. I was even more impressed with its versatility, which lets me boost the front end and dial back the mids and highs for a warm B15 sound, push the mids and treble and get a V-4B sound, crank the gain with full mids and highs and make it bark like an SVT. It's just the kind of amp a flexible bass player like me needs.