Pricing and availability

We compare 600+ stores and found this item at 1 store. Prices updated .

Average Price: $72

Budget/Beginner

$299

$800+

Price Tier

Budget

Standard

High-end

Price History

Based on price data from 1 merchant for "Harley Benton GPA-100". Prices shown reflect NEW condition. Tracking began Apr 19, 2026.

* 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

Looking to elevate your guitar sound without the bulk? Meet the Harley Benton GPA-100, a compact powerhouse designed to fit seamlessly on your pedalboard. This clever little device packs a punch, delivering up to 190 watts into 4 ohms, ensuring your sound is as big as your creativity. Whether you're playing at home or hitting the stage, its Class-D technology guarantees a robust performance with minimal energy consumption.

The GPA-100 isn't just about power; it's about precision. With controls for master volume, bass, mid, and treble, you can tailor your tone to perfection. Its intuitive LED indicators for peak, signal, and power-on ensure you're always in the loop, providing you with real-time feedback during your performance.

Designed for musicians who value versatility, this power amplifier works directly with a preamp or effect pedal, making it an ideal choice for both seasoned professionals and gigging enthusiasts. The 6.3 mm jack input and speaker output slots (compatible with 4-16 Ohm speakers) offer seamless connectivity, while its lightweight design ensures portability without compromising on durability.

Key Features:

  • Power amplifier in pedalboard format
  • Compatible with preamp or effect pedal
  • Power: 100 W into 8 ohms or 190 W into 4 ohms
  • Class-D technology
  • Controls for master volume, bass, mid, and treble
  • LED indicators for peak, signal, and power-on
  • Input: 6.3 mm jack
  • Loudspeaker output (4 - 16 Ohm): 6.3 mm jack plug
  • Power supply: AC 220-240 V

Owner's manual

Harley Benton GPA-100 User Manual

Product specs

Available since November 2020

FAQs

What type of power does the Harley Benton GPA-100 require?

The Harley Benton GPA-100 uses Class D technology and delivers 100 Watts at 8 Ohms or 190 Watts at 4 Ohms, making it a powerful yet compact choice for guitarists and bassists.

Can the Harley Benton GPA-100 be used with both guitar and bass cabinets?

Yes, the Harley Benton GPA-100 is designed to work with both guitar and bass cabinets, providing versatile amplification for different instruments.

Is the Harley Benton GPA-100 suitable for live performances?

Absolutely, the Harley Benton GPA-100's compact design and robust power output make it ideal for gigging musicians who need a portable yet powerful solution for live performances.

What is the impedance range for the Harley Benton GPA-100?

The Harley Benton GPA-100 is capable of delivering 100 Watts at 8 Ohms and 190 Watts at 4 Ohms, allowing it to work efficiently with a range of speaker cabinets.

Does the Harley Benton GPA-100 have any notable features for tone shaping?

While primarily a power amplifier, the Harley Benton GPA-100 is designed to maintain a transparent sound, allowing your preamp or effects pedals to shape your tone without coloration.

Reviews

PROS

  • Incredibly compact and lightweight, fits in your hand

  • Offers 190 watts at an unbeatable price point

  • Transparent sound that doesn't color your preamp tone

  • Active EQ for flexible tone shaping without harshness

  • High headroom with no distortion at higher volumes

  • Solid metal construction for durability

  • Easily integrates with tube preamps and modeling units

  • Reliable performance with protection circuits for peace of mind

  • No wall-wart power supply, simplifying setup

  • Consistent and powerful output suitable for live performances

CONS

  • Lacks the tonal character associated with tube power amps

  • Linear response might not satisfy those seeking tube-like dynamics

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Harley Benton GPA-100.

User experience

  • Metal players report issues with feedback when using the GPA-100 with low guitar tuning and 4x12 setups, suggesting it may not handle high-volume, low-frequency tones optimally.

    Source
  • Owners find the GPA-100 suitable for rehearsals and gigs with backlines, emphasizing the importance of not maxing out volume unnecessarily in various venues.

    Source
  • Disassembling the GPA-100 for voltage modification can be challenging, with the case being the hardest part to manage.

    Source

Features and functionality

  • For optimal output, using a 4 ohm input delivers the full 190 watts, whereas 8 ohms delivers about 100 watts, and 16 ohms around 50 watts.

    Source
  • The GPA-100 can fit compactly on a Pedaltrain Metro 20 board alongside a Quad Cortex and expression pedal, ideal for portable gig setups.

    Source
  • The GPA-100 uses a Class D switching power supply, allowing for voltage modifications without affecting performance or sound.

    Source

Use cases and applications

  • The GPA-100 maintains adequate volume in a metalcore setting with a 1x12 Eminence Legend 120W speaker, but shines when used with a 2x12 Orange V30s cab.

    Source
  • When paired with a Line6 POD Go into an Orange PPC212-cob, it provides sufficient volume for alt rock/metal in practice rooms but requires preset tweaks for louder gigs.

    Source
  • The GPA-100's power may be insufficient for higher impedance setups (8 or 16 Ohms) in loud environments, but it's adequate for moderate volume gigs with a 2x12 at 8 Ohms.

    Source
  • The GPA-100 works well at 3/4 volume through a 4 Ohm 4x12 Marshall cab, keeping up with a loud band setup.

    Source
  • Some users opt for the GPA-100 with traditional cabs to mic at gigs, offering a blend of traditional and lightweight setups.

    Source

Comparisons

  • A user noted that a Boss Katana 100W head outperforms the GPA-100 in volume, suggesting possible discrepancies in the GPA-100's listed wattage.

    Source
  • Users transitioning from larger amps like the Engl Powerball found the GPA-100 sufficient for smaller, portable setups, though higher-end alternatives like the PowerStage offer superior quality.

    Source
  • The Playtech version of the GPA-100 is recommended for users needing a 110V option, highlighting regional compatibility issues with the standard model.

    Source
  • The Carvin Mach100 and Mooer Baby Bomb are noted as alternative power amps, with the latter being a mono option.

    Source

Setup and maintenance

  • It's possible to convert the GPA-100 from 230v to 120v by bridging solder pads labeled J3 on the PCB.

    Source

Mods and upgrades

  • Owners have successfully used jumper wires or solder to modify the voltage, making it compatible with U.S. outlets.

    Source

Based on 0 Reviews and 0 Ratings

5 star
4 star
3 star
2 star
1 star

Genre Usage

Based on how artists on Equipboard use this gear, it is most commonly found in the following genres.

More Harley Benton Guitar Power Amplifiers

Artist usage

Community setups

Similar

  • Added to Equipboard on by

    mslaven
    mslaven

    Gear IQ 51