Browne Amplification Unit 13

Browne Amplification UNIT-13 – Dual Overdrive/Distortion

From subtle low-gain grit to an all-out sonic assault, the UNIT-13 puts two individually voiced gain stages at your feet. Rooted in classic American distortion circuits, it combines an extensive gain range with flexible tone shaping and a new A/B switching mode.

Both sides share the same fundamental circuit, carefully refined for different roles. The left side delivers control and fullness at lower gain settings, while the right side brings classic high-gain sounds with a more aggressive response.

Left Side – Low Gain, Full Low End

Turning down the gain on a classic distortion circuit can sound great, but it often sacrifices low end and leaves little usable range on the DRIVE control. The UNIT-13 addresses both limitations.

• Expanded low-gain control: reduced maximum gain gives you finer control throughout the DRIVE knob’s sweep, with plenty of drive still available.
• 3-way Low End toggle: dial in the right amount of bass for your guitar, amplifier and playing style.

Right Side – High Gain with Selectable Clipping

The right side takes the same core circuit in a more aggressive direction, voiced for classic higher-gain sounds.

• 2-way Clipping Diode toggle: choose between two distinct flavours of hard-clipping character.

New A/B Mode – Two Sounds, Instant Switching

An internal DIP switch activates A/B mode, assigning one footswitch to bypass and the other to switching between the two sides.

• Left footswitch – ON/OFF: engages or bypasses the entire pedal.
• Right footswitch – A/B: instantly switches between the left and right sides.
• Visual bypass indication: the selected side’s LED slowly flashes at 50% brightness, showing which sound is ready to engage.
• Prepare your next sound: switch sides while the pedal is bypassed.

Prefer traditional operation with two separate pedal sections? The standard switching mode used on Browne’s existing dual pedals is also available.

Features

• Independent LEVEL, DRIVE and TONE controls for each side
• Standard 9V DC power
• Top-mounted input, output and DC jacks
• True-bypass soft switching
• New folded-aluminium enclosure