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JAM Pedals Boomster MKII

Boomster MKII


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  • The JAM Pedals Boomster MKII is your all in one buffer and boost effects powerhouse
  • Get up to 16dB of unadulterated, punchy volume increase
  • Experience pristine audio quality with a remarkable balance of highs and lows
  • Fine tune your sound with three carefully tuned voicing options
  • Crafted with superior components for exceptional performance and sound quality
  • Features hi fi grade Burr Brown® OPA 2132 chips for outstanding sound fidelity
  • Control your volume seamlessly with the expression pedal input
  • Choose between true or buffered bypass modes to match your preferences
  • Supports 9V to 18V centre negative power input for variable headroom
  • Each Boomster MKII is meticulously hand built, ensuring precision and quality
  • All metal enclosure ensures your pedal stands the test of time, gig after gig
  • The hand painted bomb explosion graphic symbolises the pedal's dynamic and impactful sound
  • The LED power indicator provides a clear visual signal of the pedal's status
  • Side mounted jack sockets ensure efficient connectivity
  • Enjoy peace of mind with a manufacturer's limited lifetime warranty


The JAM Pedals Boomster MKII is a pedal designed to redefine the way you experience buffer and boost effects. It's not just a typical addition to your pedalboard; it's a versatile tool that offers a unique musical response and increased headroom. The JAM Pedals Boomster MKII sets new standards in terms of quality and performance.

One of the key highlights of the Boomster MKII is the selection of hi fi grade Burr Brown® OPA 2132 chips. These chips have undergone rigorous testing and comparison to ensure that they deliver exceptional fidelity across the pedal's various functions. The result is a sound quality that stands out from the crowd.

The JAM Pedals Boomster MKII serves a dual purpose. It is not just a boost pedal but also a standalone buffer, making it an indispensable component of your rig. The buffer function is designed to preserve the original feel of your instrument while instantly bringing back frequencies that can be compromised over long signal chains.

The JAM Pedals Boomster MKII offers a range of features to cater to the needs of modern musicians:

  • You can choose between selectable true or buffered bypass modes using internal dip switches, providing flexibility in how you use the pedal
  • The expression pedal input allows for precise volume control, adding versatility to your sound
  • Three finely tuned voicing options are available, allowing you to sculpt your tone to match different instruments and gear
  • The pedal offers both momentary and latching operation, giving you control over its functions
  • It operates within a 9 to 18V power input range, offering variable headroom to adapt to your specific setup

In the boost function, the JAM Pedals Boomster MKII can provide up to 16db of clean, unadulterated boost. This boost can be placed after your drive section to increase volume or at the front end of your amp or other drive pedals for additional gain staging options. The three voicing options give you the tools to fine tune your tone for different musical situations.

  • The top position attenuates the top end (adjustable via an internal trimmer)
  • The middle position retains a flat, full range response
  • The bottom position introduces more mids (adjustable via an internal trimmer)

When the Level knob is turned all the way to the left, the JAM Pedals Boomster MKII’s output level is set to unity gain.

The JAM Pedals Boomster MKII is not just another pedal; it's a versatile and high quality tool that can inspire creativity, new sounds and enhance your music experience. Whether you're a guitarist or a musician of any kind, the JAM Pedals Boomster MKII offers unique capabilities that can set you apart.

Click Here To View JAM Pedals Boomster MKII Product Manual


  • LEVEL: Pump up your output from 0dB to a powerful +16dB for that extra sonic punch
  • TOGGLE SWITCH: Tailor your tone with precision. The top, middle, and bottom positions provide versatile sound adjustments

Components and Technical Specifications

  • Superior components deliver exceptional performance and audio quality
  • Burr Brown® OPA 2132 Chips: Premium hi fi grade chips for exceptional fidelity
  • Expression Pedal Input: Control your volume smoothly with an expression pedal
  • Choose between true or buffered bypass modes to suit your needs
  • 9V to 18V centre negative compatibility
  • Battery operation is not supported
  • Current Consumption meter readings (mA) by Truetone:
    • 22 mA bypass
    • 60 mA maximum engaged

Enclosure Dimensions

  • Depth: 121 mm / 4.7 in 
  • Width: 65 mm / 2.5 in
  • Height: 40 mm / 1.6 in


  • 272 g
  • 0.60 lbs

Official UK Dealers

FX Pedal Planet Limited and FX Pedal Planet Online Store proudly serve as official UK dealers for JAM Pedals effects pedals. If we do not have the specific JAM Pedals you are looking for, please reach out to us via the contacts page, and will order it on our next stock order for you at the best price and customer service.

Buy Today and Pay Over Time

To give our customers flexibility and a pleasurable shopping experience, FX Pedal Planet Online Store accepts Klarna, Afterpay, Clearpay and Google Pay.

Klarna is a smooth and safe way to get what you want today, and pay over time. Afterpay allows customers to pay in four interest free instalments, budget your spending and earn rewards when you shop.

UK Deliveries

For our UK customers, we provide FREE 24 hour DHL tracked and signed delivery, ensuring your order arrives swiftly and securely.

International Deliveries

International deliveries are dispatched with DHL, ensuring fast shipping and efficient processing through customs.

For more information on deliveries and charges, please refer to our Deliveries and Charges.

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