LOOP-MASTER PEDALS MICRO A/B BOX – COIN BATTERY / 9V DC

Compact, passive A/B switching with internal coin battery or external 9V DC power for the LED indicator.

The Loop-Master Pedals Micro A/B Box lets you switch one guitar between two amplifiers, select between two signal paths, or switch between two instruments feeding one amplifier.

Built in our ultra-compact 1590A enclosure, this switcher takes up minimal pedalboard space while providing reliable A/B switching.

The audio path is completely passive and operates without power.

FEATURES

• True bypass A/B signal switching

• Select between Output A or Output B

• Works in reverse for selecting two instruments into one amplifier

• Heavy-duty latching footswitch

• LED selection indicator

• Two internal CR2032 coin batteries or external 9V DC power

• Completely passive audio path

• Premium jacks

• Compact aluminum enclosure

• Handcrafted in the USA by Loop-Master Pedals

HOW IT WORKS

ONE GUITAR – TWO AMPLIFIERS

Connect your guitar or pedalboard output to the common jack.

Connect Output A to your first amplifier.

Connect Output B to your second amplifier.

Press the footswitch to select which amplifier receives your signal.

Only one output is active at a time.

TWO GUITARS – ONE AMPLIFIER

The Micro A/B Box also works in reverse.

Connect your instruments to the A and B jacks.

Connect the common jack to your amplifier or pedalboard.

Press the footswitch to select which instrument is connected.

POWER OPTIONS

INTERNAL COIN BATTERIES

• Two CR2032 coin batteries

• Batteries included

• No external power supply required

• Powers the LED indicator only

EXTERNAL 9V DC

• Boss/Ibanez 2.1mm center-negative 9V DC

• Compatible with standard pedalboard power supplies

• Powers the LED indicator only

IMPORTANT: The audio switching is fully passive. No power is required for the A/B switching to function.

Without batteries or external DC power, the footswitch operates normally, but the LED will not illuminate.

APPLICATIONS

• Switch between two guitar amplifiers

• Select between two instruments

• Route a pedalboard to either of two destinations

• Switch between two effects chains

• Guitar and bass instrument selection

• Studio and recording setups

• Compact pedalboard routing

PASSIVE SIGNAL PATH

The Micro A/B Box uses straightforward mechanical switching.

• No buffers

• No active audio circuitry

• No digital processing

• No MIDI

• No programming required

Your signal passes through the selected connection without active processing.

CONNECTIONS

• Common Input / Output

• A Input / Output

• B Input / Output

• 9V DC power jack

All audio connections use standard 1/4" mono instrument cables.

Cables and external power supply are not included.

DIMENSIONS

3.63" × 1.5" × 1.06"

9.22 × 3.81 × 2.69 cm

92.2 × 38.1 × 26.9 mm

Ultra-compact 1590A aluminum enclosure.

CONSTRUCTION

• Heavy-duty aluminum enclosure

• Heavy-duty latching footswitch

• LED indicator

• Premium jacks

• Point-to-point wiring

• Completely passive audio path

• Internal coin battery power option

• External 9V DC power option

• Handcrafted in the USA by Loop-Master Pedals

IMPORTANT INFORMATION

This is an A/B selector, not an A/B/Y splitter.

Only A or B is selected at one time. Both outputs cannot be engaged simultaneously.

This unit does not provide transformer isolation, phase correction, or active buffering.

When connecting two amplifiers, ground-loop hum may occur depending on the equipment and electrical setup.

The batteries and external 9V DC connection power the LED indicator only.

HANDCRAFTED IN THE USA

Every Loop-Master Pedals switcher is individually built and assembled in the USA.

Reliable, straightforward switching in a compact, pedalboard-friendly enclosure.