Description
The JAM Pedals Tubedreamer mk.2 is a premium, point-to-point evolution of the definitive 808-style overdrive circuit. Handcrafted in Athens, Greece, JAM Pedals engineered the mk.2 to deliver a warm, rich, and naturally articulate overdrive that completely bypasses the harsh, congested midrange honk associated with generic tube-screamer clones. By pairing foundational vintage architecture with modern, performance-driven switching, the mk.2 redefines what a boutique overdrive pedal can achieve on a professional signal chain.
At the center of the Tubedreamer’s signal path is the legendary, new-old-stock JRC4558D operational amplifier chip—the same component driving the most coveted vintage units from the late 1970s and early '80s. JAM Pedals combines this historic chip with improved low-gain resolution, providing finer micro-control over your core grit and unlocking a much wider array of touch-sensitive clean-boost and light breakup textures at the bottom end of the gain sweep.
Asymmetrical Clipping vs. No-Diode Dynamic Modes
The mk.2 introduces an exceptionally interactive two-way clipping toggle that drastically alters the pedal's compression and clipping behavior:
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Asymmetrical Clipping: Uses a specialized 3-diode layout that introduces an uneven clipping threshold. This replicates the complex, touch-sensitive breakup of an overdriven tube amplifier power section, responding dynamically to your picking velocity and guitar volume adjustments.
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No-Diode Mode (N): Completely removes the clipping diodes from the circuit. This shifts the pedal into a wide-open, highly linear operational amplifier boost, providing maximum clean headroom, crisp transient delivery, and an uncompressed, amp-like response.
Dual-Channel Utility with Dual Internal Trimmers
For the first time in the Tubedreamer’s history, the high-gain boost stage is fully accessible via an independent, secondary footswitch, turning the pedal into a true two-channel dirt box. To ensure complete control over your stage levels, JAM Pedals integrated dual internal trimmers. These allow you to set an independent output volume specifically for the high-gain mode across both clipping options—allowing you to dial in either a perfectly unity-volume gain jump or a massive, soaring solo boost.
Boutique Direct Utility
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Selectable Power-On State: A smart utility feature allows you to program the pedal’s internal memory to either immediately engage or remain completely bypassed upon receiving power on your board.
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Boutique Enclosure: Housed in JAM Pedals’ signature, hand-painted enclosure, giving every single pedal a unique aesthetic finish while utilizing premium, tour-grade components.
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True Bypass Signal Integrity: Equipped with a mechanical true bypass switch to ensure your clean instrument signal passes through completely uncolored when the effect is disengaged.
Tech Specs
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Pedal Type: Professional 808-Style Overdrive / Dual-Channel Boost
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Core Component: Legendary JRC4558D Op-Amp Chip
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Controls: Level, Tone, Gain, 2-Way Clipping Toggle (Asymmetrical / No-Diode)
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Footswitches: Bypass, High-Gain Stage Engage
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Input Impedance: 500 kΩ
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Output Impedance: Less than 5 kΩ
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Power Requirement: 9V DC (Center Negative, ~60mA current draw)
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Dimensions: 2.9" x 4.7" x 2.2" (7.5cm x 12.0cm x 5.6cm)
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Origin: Handbuilt and Hand-Painted in Athens, Greece
