
JAM Pedals Boomster mk.2
Product Condition
Brand New | Unused, as sold. |
---|---|
Mint | Like new, no flaws. |
Excellent | Barely used, very minor wear. |
Very Good | Light wear, fully functional. |
Good | Visible wear, plays fine. |
Fair | Heavy wear, still playable. |
Couldn't load pickup availability
Description
Description
The high headroom provides an overwhelming sound projection that boosts the amplifier's range without losing any of it's feel.
This is a compact, professional booster with excellent user options and a wide range of user capabilities.
With its musical response and increased headroom, the Boomster mk.2 sets a new standard for buffers and boosters. After extensive testing and comparison with currently available chips, we selected the hi-fi grade Burr-Brown OPA 2132 chip for optimal performance. This results in ample tonal range and a rich sound. Equipped with features and refined features to meet the demands of modern musicians, this boost pedal is an essential tone component for any rig.
[About the included functions]
- True bypass or buffered bypass selectable via internal dip switch
- Expression pedal input (can be used as a volume pedal)
- 3 voicing options
- Momentary/latching operation
-9-18V power input range allows variable headroom
■Booster function: Provides extremely clear boost sound of up to 16dB.
Place the Boomster mk.2 after a drive section to boost volume, or push a drive pedal or amp to create an additional gain stage. Three voicing options let you precisely tailor the tone of your boosted sound, designed to match a variety of guitars, effects, and amps.
- Up position: Attenuates high frequencies (adjustable with internal trimmer)
- Center position: Maintains a flat full-range response
- Down position: Emphasizes mid-range (adjustable amount with internal trimmer)
*When the Level knob is fully to the left (turned down), the output level of the Booster is at unity gain.
Volume Pedal Function: When combined with a commercially available 10k passive expression pedal, it can be used as a volume pedal. When the effect is on, the volume increases from off (heel down) to the position set by the L (Level) knob. When the effect is off and in buffered bypass mode, the volume can be adjusted up to unity gain.
■Specifications
1. True Bypass or Buffered Bypass
Compatible with 2.9V-18V DC adapters (center negative, isolated power supply recommended)
3.Maximum power consumption: 50mA
4. EXP Input: 10k passive expression pedal compatible
5. Dimensions: 7.5x12x5.6cm (including jacks, pots, etc.)
6. Weight: 300g
7. Input and output are in phase
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
For orders exceeding Paypal’s transaction limit of 1 million yen, we will provide more details. For secure transactions, items will only be shipped to the address registered in your Paypal account.
Regarding detailed information and contact information to us, please check FAQ.
Please Note
The following information applies to international orders.
■ Condition
Items with “USED” in the product name are pre-owned and will be delivered as shown in the photos. Signs of wear may be present. All items are function-tested by our staff and rechecked before dispatch.
■ Stock
Many products are stocked across Ikebe stores in Japan. As a result, shipment may take several days. In-store sales may also cause items to sell out. If an item is unavailable, we will contact you promptly; in that case, the order will be canceled and any payment will be refunded.
■ Shipping
We ship via FedEx. Shipments are fully insured against damage or loss during transit.
- Asia: 10–20 days (estimated)
- North America & Oceania: 20–30 days (estimated)
Shipping costs are calculated based on the delivery address and confirmed at the time of dispatch.
■ Taxes & Duties
Import duties, taxes, and fees are the buyer’s responsibility and are not included in the item price or shipping cost. These fees are typically collected by the carrier upon delivery or at pickup. Please check with your country’s customs office for details before purchasing.
■ Other
We cannot declare a reduced item value or mark purchases as gifts.
* Warranty
Our product warranty is valid only within Japan.
* Voltage
All electrical products are intended for the Japanese market and are designed for 100 V operation.

About us
Founded in 1975, Ikebe Music is one of Japan's largest general music stores.Thanks to its long history and proven track record, it has earned the trust of musicians and music fans not only in Japan but around the world.
Ikebe Music ships not only within Japan, but also overseas.As a well-known retailer of used musical instruments in Japan, we have a wide selection of used and vintage instruments.
We have a wide variety of unusual and rare instruments, so please take a look.Please note that we do not list new products, as our contracts with our suppliers prohibit international shipping.
About our stores
In Japan, we have about 30 stores in Tokyo (Ikebukuro, Shibuya, Akihabara) and Osaka.
We have just opened our flagship store, IKESHIBU (IKEBE SHIBUYA), in Shibuya, Tokyo, which brings together numerous musical instrument specialty stores and serves as a hub for entertainment culture.
Please be sure to stop by if you are visiting Japan.


About Shipping





We carefully pack every item with protective materials to ensure it arrives safely.
The photos above show an example of how we securely pack a bass guitar for shipping.