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Klemt Echolette BS40

4.5 (3)

This product is Vintage or Discontinued

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Page last updated Aug 10, 2025

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Description

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The Klemt Echolette BS40 is a testament to the golden age of analog amplification, revered by guitarists who crave authentic, vintage tones. This classic guitar amplifier head delivers a rich and warm sound, perfect for capturing that nostalgic vibe of the '60s and '70s. Equipped with a tube-driven preamp stage, the BS40 brings an unmistakable warmth and sustain that digital units often struggle to replicate. Its robust 40-watt output is suitable for both practice sessions and small to medium-sized gigs, providing enough headroom for clean tones while also offering a satisfying crunch when pushed.

The Echolette BS40 features a simple yet effective control layout, allowing musicians to dial in their desired sound with ease. It includes essential controls such as treble, bass, volume, and presence, enabling versatile tone shaping. The amp head also boasts a dedicated effects loop, making it an ideal choice for those who enjoy integrating additional effects into their signal chain without losing tonal integrity.

Known for its reliability and robust build, the Klemt Echolette BS40 is a perfect companion for both studio recordings and live performances. Its vintage charm, combined with modern functionality, makes it a sought-after piece for collectors and gigging musicians alike.

Key Features:

40-watt tube-driven output for authentic vintage tones
Classic control layout: treble, bass, volume, and presence
Dedicated effects loop for seamless integration of external effects
Durable construction for reliable performance at gigs and in the studio
Celebrated for its warm, rich sound reminiscent of classic rock eras

Product specs

Amp Type

tube

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Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Klemt Echolette BS40.

Features and functionality

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The standby switch works oppositely from typical amps; power is turned on with standby off, then standby is switched on after warmup.
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The amp includes a "level" screw above the Ohms switch, which acts as a master volume control.
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The amp's master volume is located on the back, which may require adjustments in accessibility.
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The secondary side of the power transformer must strictly adhere to the original schematic specifications to ensure proper functionality.
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User experience

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Owners report that the amp is incredibly loud, comparable to a German-made JTM45 from the mid-sixties.
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Mods and upgrades

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Replace original trimmer pots with Piher for reliability, as old ones can fail and affect EL34 bias.
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Consider using ECC808 with an adapter instead of rewiring for 12AX7 tubes for improved performance.
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For North American users, consider having a custom power transformer built with a single 120v primary winding to simplify replacement.
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Setup and maintenance

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Swap all electrolytic and coupling caps due to age; they're often unreliable after 50+ years.
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It's suggested to search eBay for used power transformers specific to the Echolette BS40, particularly from Germany, due to their unique design per model.
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Build quality

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The power transformer was originally designed for worldwide use, featuring four primary windings adaptable via a voltage selector, making replacements complex.
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4.5 out of 5

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Andrew Stockdale

Singer, Guitarist

Wolfmother

Verified via Premierguitar

As seen on the guitarworld site, the interview explains the equipment used, which includes an old echolette.

Ace Kefford

Singer, Bassist

The Move

Verified via YouTube

In the 1967 Beat-Club performance of "I Can Hear The Grass Grow," Ace Kefford of The Move is seen using a Klemt Echolette BS40 bass head. While most band members appear to be using Klemt Echolette Showstar heads paired with ET100 2x12 cabinets, one amp head in the lineup features a distinct knob configuration, identifying it as the BS40. Although Kefford did not own this amp, his performance delivers a notably snarly and punchy tone, enhanced by his Fender slab P-Bass with round wound strings.