Boomster mk.2 - Guitar effect pedal Jam Pedals - Free user manual and instructions

Product type	Guitar effect pedal (buffer / booster)
Brand	Jam Pedals
Model	Boomster mk.2
Main functions	Boost up to 16 dB, high-fidelity buffer, volume pedal, 3 voicing modes
Power supply	DC 9V to 18V adapter, center negative, max current draw 50 mA
Dimensions	7.5 x 12 x 5.6 cm (2.9 x 4.7 x 2.2 inches)
Weight	300 g (0.66 lb)
Expression input	Passive 10k ohms expression pedal
Bypass	True or buffered selectable via internal DIP switches
Operation	Momentary or latching
Voicing options	Treble attenuation, full range response, mid boost with internal trimmers
Output level	Up to 16 dB of boost, unity gain at full left
Phase	Input and output in phase
Maintenance and cleaning	Clean with a dry, soft cloth, avoid abrasive products
Safety	Use only a recommended adapter, avoid humidity
Spare parts and repairability	Contact Jam Pedals for any after-sales service
General information	Isolated power supply recommended for optimal operation

Frequently Asked Questions - Boomster mk.2 Jam Pedals

How to use the booster function?

Set the level with the LEVEL potentiometer. The pedal delivers up to 16 dB of clean boost. Place it after your distortions to increase the volume or before to add gain.

How to select true or buffered bypass?

Use the internal DIP switches to choose between true bypass (direct signal) or buffered (with a Burr-Brown OPA 2132 buffer). Refer to the provided diagram.

How to change the voicing?

The 3-position selector allows you to choose: treble attenuation (trimmer control), full range response, or mid boost (trimmer control). Adjust according to your preferences.

How to use the pedal as a volume pedal?

Connect a passive 10k expression pedal to the EXP input. The volume goes from zero in the heel position up to the level set by LEVEL if the pedal is activated, or to unity if it is bypassed in buffered mode.

What power supply to use?

A DC 9V to 18V adapter, center negative, with a maximum current draw of 50 mA. An isolated power supply is recommended to avoid noise.

Does the buffer alter the sound?

The buffer uses the high-quality Burr-Brown OPA 2132 chip, it restores frequencies lost in long cables without harshness or compromised mids, and preserves the playing feel.

How to adjust the internal trimmers?

Open the enclosure, locate the trimmers for treble attenuation and mid boost. Turn them with an insulated screwdriver while listening to the sound. It is a 'set-and-forget' adjustment.

Is the pedal suitable for other instruments?

Yes, the voicings are tuned for guitar but have been tested with all kinds of instruments, such as keyboards or basses.

What are the dimensions and weight?

The pedal measures 7.5 x 12 x 5.6 cm and weighs 300 g, making it compact and light for any pedalboard.

How to maintain the pedal?

Clean the exterior with a dry, soft cloth. Avoid humidity and shocks. Use a suitable adapter to avoid any damage.

USER MANUAL Boomster mk.2 Jam Pedals

Let everyone hear you Loud and Clear!

Boomster mk.2

With its musical response and increased headroom the Boomster mk.2 aims to redefine the quality standards of the buffer and booster genres.

Extensive testing and comparison sessions with most of the appropriate chips currently in production, resulted in us opting for the hi-fi-grade Burr-Brown™ OPA 2132 chips, which deliver effortless fidelity and lushness across the Boomster mk.2's different functions.

Our mission with the mk.2 version of the Boomster was to elevate it into a well-rounded boost pedal encompassing all the necessary features and functions contemporary musicians have come to expect, as well as to offer a standalone buffer that not only sounds great but also feels right under the hands, making it an indispensable tone component of any rig.

Mission accomplished!

The Boomster mk.2 comes loaded with:

• selectable true or buffered bypass via internal dip switches (see schematic)
• an expression pedal input to use as a volume pedal
  • 3 minutely tuned voicing options
  • momentary / latching operation
  • 9-18V power-input range for variable headroom

Booster function:

Get up to 16db of clean unadulterated boost. Place the Boomster mk.2 after your drive section for a volume increase or hit the front end of your amp or different drive pedals to introduce an added gain-staging option!

The 3 voicing options available are designed to help you precisely sculpt your tone and match different guitars, pedals and amps to one another. We have carefully tuned these to a guitar-friendly range but have tested them to be useful with all sorts of instruments:

• the top position attenuates the top end (control by how much via set-and-forget internal trimmer)
• the middle position retains a flat, full-range response

- the bottom position introduces more mids (control by how much via set-and-forget internal trimmer)

*When the Level knob is all the way to the left (closed) the Booster's output level is at unity gain.

BUFFER BYPASS FUNCTION:

The rigorous R&D process employed for the development of the buffer inside the Boomster mk.2, accomplished the 2 main traits we feel make for a great buffer;

With the Burr-Brown™ OPA 2132 chip powering the buffer the Boomster mk.2 will:

• instantaneously bring back frequencies compromised over long signal chains, without the unwanted top-end harshness and compromised mids many buffers suffer from.
• successfully retain the original feel of the instrument, something very few buffers achieve.

VOLUME PEDAL FUNCTION:

Pair the Boomster mk.2 with any commonly available 10k passive Expression pedal and you have yourself a smooth travelling volume pedal starting from OFF at the heel position all the way to wherever it is that you have the L (level) knob set if the pedal is activated, or from OFF to unity gain when the pedal is disengaged and in buffered bypass mode!

SPECIFICATIONS

• True or Buffered Bypass
- Works with 9V-18V DC adaptor (centre-negative, isolated power supply recommended)
• Power consumption (max): 50 mA
- EXP input: 10k passive expression pedals
- Dimensions (jacks, pots etc. included): 7.5x12x5.6cm / 2.9x4.7x2.2 inches
• Weight: 300g / 0.66lbs
• Output and input are in-phase