Engl 840/50 Tube Poweramp

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$1,022.00 to $1,799.99 Price Tier: High-end

4.5 (3)

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1 wishlisted

9 saved

Page last updated Jun 07, 2026

Pricing and availability

We compare 600+ stores and found this item at 5 stores. Prices updated June 7, 2026.

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Price

$1,799.99

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5.0 (1)

$1,799.99

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$1,799.99

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5.0 (2)

$1,100.00 2 available Used

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4.9 (31)

$1,029.00 $1,022.00 $7.00 · All time low

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Average Price: $1,504

High-end/Boutique

$299

$800+

Price Tier

In the Guitar Power Amplifiers category, Engl 840/50 Tube Poweramp 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

Price History

Based on price data from 4 merchants for "Engl 840/50 Tube Poweramp". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

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Looking to supercharge your rackmount guitar rig with a powerhouse of tonal versatility? The Engl 840/50 Tube Poweramp is your answer. This 100-watt, 2-channel power amplifier is designed for those who crave the rich, vibrant tones only tubes can deliver. Equipped with four 6L6GC power tubes and three ECC83/12AX7 preamp tubes, this poweramp ensures your sound is infused with lush overtones and plenty of headroom, making it perfect for both studio and stage applications.

The Engl 840/50 offers dual-channel functionality with individual Presence controls and A and B Volume knobs, allowing you to tailor two distinct soundscapes. Whether you're looking for a clean, crisp tone or a crunchy, overdriven sound, you can switch seamlessly with a footswitch, granting you ultimate control during live performances. Plus, the unit's sturdy rackmount design makes it an ideal centerpiece for any professional guitar setup.

Key Features:

100W, 2-channel power amplifier (50W per channel)
Rackmount design suited for guitar rigs
Loaded with 4 6L6GC power tubes and 3 ECC83/12AX7 preamp tubes
Delivers rich, tube-fueled overtones with ample headroom
Per-channel Presence controls for extensive tweakability
A and B Volume controls for two distinct volume settings
Footswitchable operation for easy control during performances

Product specs

Available since

July 2004

FAQs

What type of tubes does the Engl 840/50 Tube Poweramp use?: The Engl 840/50 Tube Poweramp uses four EL34 tubes for its power section, providing a warm and dynamic sound typical of tube amplifiers.
Is the Engl 840/50 suitable for live performances?: Yes, the Engl 840/50 Tube Poweramp, with its 2x50W stereo output, is powerful enough for live performances and can handle a wide range of venues.
Can the Engl 840/50 Tube Poweramp be used in a stereo setup?: Yes, the Engl 840/50 is designed for stereo operation, making it ideal for setups that require stereo amplification.
Does the Engl 840/50 Tube Poweramp have a built-in effects loop?: The Engl 840/50 Tube Poweramp does not include a built-in effects loop, as it is a power amp intended to amplify pre-processed signals.
What are the core tonal characteristics of the Engl 840/50 Tube Poweramp?: The Engl 840/50 Tube Poweramp is known for its clarity, punch, and warmth, making it suitable for a variety of musical styles from clean jazz to heavy rock.

Videos

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Andrei Grozea

"Tiger hunter" - ENGL E530 & E840/50 Death Metal

Andrei Grozea

ENGL E530 and E840/50 - Death Metal

Andrei Grozea

Reviews

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PROS

Exceptional for metal with raw tube power
Versatile, works well with different speaker setups
Presence knob adds unique sound customization
User-friendly controls, easy to adjust settings
Dual channel with individual presence and volume controls
Built like a tank, durable construction
Loud enough for any stage or practice room
Performs well at both low and high volumes
Simple setup, doesn't require pedal adjustments

CONS

Heavy, can be cumbersome to transport

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Engl 840/50 Tube Poweramp.

Features and functionality

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The ENGL 840/50 allows use of one channel while the other remains on standby, ensuring safe operation with a single 16-ohm cabinet.
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The power amp's design suggests that turning one channel to standby effectively isolates it, functioning as two separate mono amps within a single unit.
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The power supply can be modified to accept regular Western-style power cords, enhancing convenience for users in North America.
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The ENGL 840/50 power amp is often paired with the ENGL e530 preamp for versatile sound shaping, allowing for tech death tones with extensive mid control options.
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Setup and maintenance

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When using a single channel, ensure the matching ohm rating between the power amp output and the connected speaker to avoid damage.
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Taping down the unused channel's standby switch is recommended for those concerned about accidental activation.
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The ENGL 840/50 can be rewired for 110V operation by a technician, avoiding the need for an external step-up transformer.
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An internal 3.15A fuse protects the amp when wired for 120V; a step-up transformer should at least match this capacity for safety.
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User experience

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It's confirmed that even with the volume at zero, the standby switch must be off to prevent potential energy flow through the unused channel.
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Owners report success with a local technician modifying the power supply instead of relying on external transformers, simplifying the setup.
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Owners appreciate the ENGL 840/50's weight of nearly 24 pounds, providing substantial heft without being overly cumbersome for transportation.
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Mods and upgrades

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Replacing low-capacity diodes in the power supply can improve reliability and ensure better performance when converting voltage.
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Users have successfully used the ENGL 840/50 in stereo setups with a 2x12 cab, effectively managing power distribution at 50 watts per speaker without overloading.
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Use cases and applications

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The amp is favored for its ability to deliver tight, heavy distortion at a lower gain setting of 4.5, making it suitable for technical death metal genres.
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The ENGL 840/50 is noted for delivering tech death tones without needing a gain boost, contrary to some reviews suggesting otherwise.
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Comparisons

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Some users prefer the transparency of the TC Electronics G Major II over previous models, highlighting its improved noise performance in signal chains.
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