JAM Pedals Tubedreamer Mk.2 Overdrive Effects Pedal

The JAM Pedals Tubedreamer Mk.2 takes the beloved, mid-focused character of a classic 808-style overdrive and supercharges it with modern flexibility. From edge-of-breakup warmth to saturated lead tones and open, amp-like drive, this premium analogue pedal effectively gives you a Tube Screamer, a boost and a more transparent overdrive in one compact box.

At its heart is a carefully tuned 808-inspired circuit built around the sought-after JRC4558D chip, delivering the familiar smooth clipping, focused mids and tight low end that sit perfectly in a mix. JAM Pedals then expand on this foundation with a switchable clipping mode, a dedicated high-gain footswitch and internal trimmers, letting you tailor the response to your guitar, amp and playing style with ease.

On the surface, the Tubedreamer Mk.2 is reassuringly simple to use. Level, Tone and Gain controls cover everything from subtle push to full-bodied overdrive, while the clipping toggle and high-gain footswitch give you instant access to multiple flavours of drive without touching your amp. Whether you are stacking it with other pedals, pushing a valve amp or using it as your main source of dirt, it is designed to stay musical and responsive under the fingers.

Under the hood, thoughtful details make this a serious tool for the stage and studio. Dual internal trimmers let you set the output level of the high-gain mode so your solo boost is always exactly where you want it, and selectable power-on states mean the pedal can boot up in your preferred configuration every time. With true bypass switching preserving your core tone when disengaged, the Tubedreamer Mk.2 is a versatile, professional-grade overdrive that rewards careful setup and inspires confident playing.

Classic 808 Voice with Vintage-Correct Chip

Based on the iconic 808-style overdrive and built around a vintage-correct JRC4558D chip, the Tubedreamer Mk.2 delivers the smooth, mid-forward drive that guitarists rely on to cut through a band mix. The familiar feel under the fingers makes it an easy drop-in replacement for a traditional Tube Screamer, but with the added refinement and clarity that JAM Pedals are known for.

Flexible Clipping Modes

The asymmetrical 3-diode clipping mode offers rich, harmonically complex overdrive with a touch of extra bite, ideal for expressive lead work and dynamic rhythm parts. Flicking to the no-diode mode removes the clipping diodes from the circuit for increased headroom and a more open, amp-like response, perfect when you want your pick attack and guitar character to shine through.

On-the-Fly High-Gain Footswitch

A dedicated high-gain footswitch engages an additional gain stage, effectively giving you a second, hotter channel at your feet. Set your base sound for low to medium drive, then kick in the high-gain mode for solos or heavier sections without touching your amp or pedal controls, keeping your transitions smooth and your levels consistent.

Customisable Performance Features

Dual internal trimmers allow you to fine-tune the output level of the high-gain mode so it matches or boosts your main sound exactly as needed. Selectable power-on states for both the main effect and the high-gain stage mean the pedal can always start up in your preferred configuration, while true bypass switching ensures your clean tone remains unaffected when the Tubedreamer Mk.2 is off.

• Premium 808-Style Overdrive Circuit - Based on a classic Tube Screamer-style design and using a JRC4558D chip, the Tubedreamer Mk.2 delivers the familiar mid-focused drive that tightens your low end and helps your guitar sit perfectly in the mix.
• Switchable Clipping and Open Mode - Choose between asymmetrical 3-diode clipping for rich, saturated overdrive or a no-diode mode for increased headroom and a more open, amp-like feel, giving you two distinct tonal characters in one pedal.
• Dedicated High-Gain Footswitch - Engage an extra gain stage at the tap of a footswitch to move from pushed rhythm tones to singing lead sounds instantly, effectively adding a built-in boost channel without needing a second pedal.
• Internal Trimmers and Selectable Power-On State - Fine-tune the high-gain output level with dual internal trimmers and set how the pedal and high-gain mode behave at power-up, so your rig always starts exactly how you like it, with true bypass preserving your core tone when the effect is off.

General

• Model: Tubedreamer Mk.2
• Type: Analogue Overdrive Effects Pedal

Circuit

• Design: Based on classic 808-style overdrive
• Op-Amp: JRC4558D (vintage-correct specification)
• Clipping: Asymmetrical 3-diode clipping
• Additional Mode: No-diode mode for increased headroom and dynamics
• Bypass: True bypass switching

Controls

• Level
• Tone
• Gain
• Clipping Toggle: Asymmetrical clipping or no-diode mode
• High Gain Footswitch: Engages additional gain stage
• Internal Trimmers: Dual trimmers for high-gain output level
• Selectable power-on state for effect and high-gain stage

Power

• Power Requirement: 9V DC
• Polarity: Centre negative
• Current Draw: 60 mA

Impedance

• Input Impedance: 500 kΩ
• Output Impedance: Less than 5 kΩ

Dimensions and Weight

• Dimensions: 7.5 x 12 x 5.6 cm
• Weight: 280 g