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$701+

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Description

The Ampeg Portaflex B-15N 1970s is a testament to the golden era of bass amplification, offering a classic tone that has graced countless recordings. Renowned for its rich, warm sound, this iconic combo amplifier continues to be a favorite among bassists who crave vintage tone without sacrificing modern reliability. The B-15N combines the best of both worlds with its durable construction and timeless design.

During the 1970s, the Portaflex B-15N underwent several thoughtful improvements. The chassis was updated to aluminum for enhanced durability, while the addition of Ultra High and Ultra Low switches provided expanded tonal versatility, allowing musicians to easily tailor their sound. The iconic flip-top design ensures that the amp remains portable and easy to maintain, making it a practical choice for touring musicians and studio sessions alike.

Whether you're playing jazz, rock, or blues, the Portaflex B-15N delivers a smooth, deep bass response that complements any style. Its legendary reputation is cemented by its ability to produce a clean, articulate sound that cuts through the mix, all while maintaining a distinct vintage flair.

Key Features:

  • Aluminum chassis for enhanced durability
  • Flip-top design for easy transport and maintenance
  • Ultra High and Ultra Low switches for expanded tonal versatility
  • Renowned rich, warm sound perfect for studio and live performances
  • Classic vintage design with modern reliability

Product specs

Brand Ampeg
Model B-15N Portaflex 25-Watt 1x15" Bass Combo
Finish Black Vinyl
Year 1968 - 1980
Made In United States
Categories Bass Combo Amps, Guitar Combo Amps
Direct Output No Direct Output
Electronics Tube
Number of Channels 2 Channels
Number of Inputs 4 Inputs
Output Power (Watts) 25
Power Tube Type 6L6
Reverb None
Speaker Configuration 1x15"

FAQs

What are the core tonal characteristics of the Ampeg Portaflex B-15N 1970s?

The Ampeg Portaflex B-15N is renowned for its warm, vintage tube tone, delivering rich bass with a smooth low-end and clear mids, making it ideal for classic rock, jazz, and Motown sounds.

Is the Ampeg Portaflex B-15N 1970s suitable for live performances?

With its 25-watt output and single 15-inch speaker, the B-15N is best suited for small venues or studio settings. It provides a classic bass tone but may require additional amplification for larger gigs.

What type of tubes does the Ampeg Portaflex B-15N 1970s use?

The Ampeg Portaflex B-15N utilizes 6L6 power tubes, which contribute to its warm, vintage sound characteristic of tube amplifiers.

Does the Ampeg Portaflex B-15N 1970s have built-in reverb?

No, the Ampeg Portaflex B-15N does not feature built-in reverb, focusing instead on delivering pure, uncolored bass tones.

How many inputs does the Ampeg Portaflex B-15N 1970s have?

The Ampeg Portaflex B-15N features four inputs, allowing for versatile connectivity options for multiple instruments or configurations.

SmallTownMusic1997

SmallTownMusic1997

Ampeg B 15 N Vintage Tube Amp Porta Flex

Video thumbnail for Ampeg B 15 N Vintage Tube Amp Porta Flex by SmallTownMusic1997

Ampeg B 15 N Vintage Tube Amp Porta Flex

SmallTownMusic1997

SmallTownMusic1997

Video thumbnail for Better than a Fender BASSMAN for Guitar? - 1969 Ampeg B15N Portaflex by The Guitologist

Better than a Fender BASSMAN for Guitar? - 1969 Ampeg B15N Portaflex

The Guitologist

The Guitologist

Video thumbnail for SOLD - Ampeg B-15N Amp for Sale, Late 60s, early 70s. by Jim

SOLD - Ampeg B-15N Amp for Sale, Late 60s, early 70s.

Jim

Jim

Reviews

PROS

  • Classic Ampeg tube tone with rich, warm sound

  • Sweet spot at volume level 4 for optimal sound

  • Produces smooth, ballsy, and gritty tones

  • Excellent for sessions and small club gigs

  • Highly portable and easy to transport

  • Reliable performance over decades of use

CONS

  • Lacks power for high-volume bass lines

  • Struggles to compete with louder guitar amplifiers

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Ampeg Portaflex B-15N 1970s.

Setup and maintenance

  • Expect to pay $100-150 for a cap job if it hasn't been done recently; original speakers varied from JBL to Altec, each offering distinct tonal flavors.

    Source

Use cases and applications

  • Particularly well-suited for old school R&B, country, and blues; some users have even recorded heavier styles with impressive results.

    Source
  • Not designed for large stages, it excels in recording settings or intimate performances, offering deep, full sounds.

    Source

User experience

  • Common issues include rattling from gaskets and shock mounts, often noticeable on specific notes like D or Eb, but these are typically simple to fix.

    Source
  • Owners often describe the tone as "phat" and "warm," making it ideal for recording studios and small sessions.

    Source

Build quality

  • The 70s fixed-bias model requires bias adjustments when retubing; be cautious of incorrect tube substitutions over time due to unique components.

    Source
  • Ampeg transitioned from CTS to Eminence speakers in the mid-70s, maintaining similar sound profiles due to design carryovers.

    Source

Features and functionality

  • Known for its recording studio excellence but may distort quickly in live settings with drummers, limiting its gigging potential without an extension cab.

    Source
  • The amp's design and circuit largely remained unchanged from 1968/69 to 1980 after adopting the thiele cab and four input panels.

    Source

Value and pricing

  • A mid to late '70s model is valued around $1200, considered reasonable for its era.

    Source

Critic Reviews

A Guide to the Golden Age of the Ampeg B-15: 1960-1980 | Reverb News

reverb.com

The Ampeg Portaflex B-15N is a beloved classic that embodies vintage charm and tonal richness, making it a favorite among bassists. Its design evolution showcases an impressive lineage, with each iteration refining its sound capabilities and aesthetic appeal. Players rave about its warm, punchy tone, ideal for both studio and live settings, while its portability and user-friendly layout add to its allure. However, the B-15N's age can lead to variability in sound quality and reliability, making it essential for buyers to seek well-maintained models. Overall, this amp remains a must-have for serious musicians, offering both nostalgia and powerful performance.

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Artist usage

Add artist
See how Jeff Mangum uses Ampeg Portaflex B-15N 1970s

Jeff Mangum

Singer, Guitarist

Neutral Milk Hotel

...
Verified via YouTube

At the beginning of this video, you can see Jeff's three Ampeg amps behind him. They are all Portaflex series amplifiers, two are from the 60s and one is the B-15 variant from the 1970s.

See how Tomoya Ohtani uses Ampeg Portaflex B-15N 1970s

Tomoya Ohtani

Guitarist, Bassist

...
Verified via Photo

An Ampeg Portaflex B-15N can be seen in the linked Instagram post by Tomoya Ohtani.

Used With

Based on how musicians on Equipboard use Ampeg Portaflex B-15N 1970s, it is most commonly used with the following gear.

Ampeg B-12 Portaflex Fliptop
Ampeg B-12 Portaflex Fliptop Bass Amplifier Stacks
1

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