Ampeg B15S

$1,600.00 Price Tier: High-end

5.0 (1)

Find out who is using Ampeg B15S

0 wishlisted

1 saved

Page last updated Apr 29, 2026

Pricing and availability

We compare 600+ stores and found this item at 1 store. Prices updated April 29, 2026.

Store

Reviews

Price

$1,600.00 1 available Used

View Deal

Average Price: $1,600

High-end/Boutique

$200

$701+

Price Tier

In the Bass Combo Amplifiers category, Ampeg B15S is priced in the High-end/Boutique range. This premium gear is built to very high standards and offers premium features.

Budget

Standard

High-end

^* Product prices and availability are updated by Equipboard every 24hrs and are subject to change. Equipboard may receive compensation for purchases made at participating retailers linked on this site. This compensation does not affect what products or prices are displayed, or the order of prices listed. For more information, please refer to our affiliate disclosure.

Description

Edit description

The Ampeg B15S is a legendary bass combo amplifier that seamlessly combines vintage warmth with contemporary reliability. Renowned for its solid-state rectifier, this amplifier delivers a smooth, warm tone that appeals to bassists seeking both clarity and depth in their sound. Its classic design is complemented by a tilt-back rod, making it as functional as it is stylish, and perfect for both studio sessions and live performances.

The B15S offers a rich tonal palette, allowing you to explore everything from rich, deep lows to bright, punchy highs. Its intuitive controls make dialing in the perfect sound a breeze, whether you're a seasoned professional or a passionate hobbyist. The robust construction ensures longevity, so you can rely on the B15S to deliver consistent performance gig after gig.

Whether you're laying down tracks in the studio or commanding the stage, the Ampeg B15S is sure to impress with its iconic tone and user-friendly features. It's more than just an amplifier; it's a piece of musical heritage that stands the test of time.

Key Features:

Solid-state rectifier for reliable performance
Tilt-back rod for optimal sound projection
Warm and classic Ampeg tone
Intuitive controls for easy sound customization
Durable construction for long-lasting use

Product specs

Brand	Ampeg
Model	B-15S Portaflex 25-Watt 1x15" Bass Combo
Finish	Black Vinyl
Year	1971 - 1977
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 kind of tones can I expect from the Ampeg B15S for bass music?: The Ampeg B15S is known for its warm, vintage tube tone, making it ideal for classic rock, jazz, and Motown-style bass sounds. Its 25-watt output provides rich harmonics and smooth low-end frequencies.
Is the Ampeg B15S suitable for live performances?: With a 25-watt output, the Ampeg B15S is best suited for small venues or studio settings. It may not be powerful enough for large gigs without additional amplification support.
Does the Ampeg B15S have any built-in effects?: The Ampeg B15S does not feature built-in effects like reverb or distortion. It focuses on delivering a pure, vintage tube sound, so external pedals would be needed for additional effects.
How portable is the Ampeg B15S for gigging musicians?: The Ampeg B15S, with its Portaflex design, allows the head to be flipped inside the cabinet, making it relatively portable for a tube combo amp. However, it is still somewhat heavy due to its build and components.
What type of speaker does the Ampeg B15S use?: The Ampeg B15S features a single 15-inch speaker, providing a deep and full bass response suitable for various musical styles.

Videos

Add video

Mateusz Piotrowski

Ampeg B15S 1971 VS. Ampeg B15N 1963

Mateusz Piotrowski

1971 Ampeg B15s and Early 70's Fender Precision Bass

rattan3793

BUZZ Wasp Demo on Ampeg B15S

Mateusz Piotrowski

Ampeg Pf-T50 vs Ampeg B-15S

Obrad Lacarac

Reviews

Add review

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Ampeg B15S.

Value and pricing

0 0

The cab significantly impacts value; standalone amps often sell for less, around $500, unless it's an early or rare model in excellent condition.
Source

Setup and maintenance

0 0

Maintenance needs like tube replacement and cap jobs can decrease value; original parts and cosmetic condition are crucial.
Source

User experience

0 0

Owners note that local sales are often necessary due to the amp's size and weight, affecting its marketability.
Source
0 0

Owners report the amp may sound "farty" at higher volumes, particularly with bass, suggesting potential speaker issues or inherent limitations with the amp's original design.
Source

Mods and upgrades

0 0

Replacing the original Altec speaker with an Eminence Delta is a common modification that enhances sound quality for both bass and guitar applications.
Source
0 0

The SushiBox Slampegg Bee Pre is highlighted as a tube preamp pedal that closely emulates the B15 tone, receiving positive reviews for its performance and customer service.
Source

Comparisons

0 0

The B15S shares a power amp design similar to the 60-watt V series amps (V2/VT40) but pairs it with a simplified B series preamp, offering a unique tonal blend.
Source
0 0

The Ampeg PF-20T and 50T are solid alternatives for achieving B15 tone, with the B25B vintage model considered a close match due to its similar power amp design.
Source
0 0

The Ashdown 220Touring combo is suggested as a viable alternative, featuring a tube preamp and a single 12" speaker, though its passive EQ system is noted for its complexity.
Source