Overdrive

HKD$250 (Local delivery included)

Plug & play module
Overdrive effect module
Enclosure assembly
Actual sound effect, for reference 🔊

Power consumption - 72mW / 8mA

This overdrive circuit is a study in efficient, high-performance analog design. By utilizing the TL072 Dual Op-Amp, the pedal achieves a professional-grade signal path with a minimal footprint. Combined with asymmetrical diode clipping, this design focuses on touch-sensitivity and a "creamy" harmonic profile that responds dynamically to your guitar's volume knob.

Key Technical Features

1. The TL072 JFET-Input Core

The TL072 is favored by pedal builders for its high input impedance and low noise floor. In this circuit, the two internal op-amps are typically split into two distinct roles:

Stage A (Gain/Clipping): The first half of the chip handles the heavy lifting, amplifying the guitar signal and pushing it against the clipping diodes.
Stage B (Buffer/Recovery): The second half acts as an output buffer or a recovery stage to make up for any volume lost during the tone-shaping process, ensuring the pedal has plenty of "unity gain" on tap.

2. Triple 1N4148 Asymmetrical Clipping

The defining "growl" of this pedal comes from three 1N4148 silicon diodes. By placing two diodes in series against a single diode in parallel, the circuit clips the positive and negative halves of your guitar's signal unevenly.

The Harmonic Edge: This creates a complex waveform rich in second-order harmonics. While symmetrical clipping (2 diodes) sounds smooth and compressed, this asymmetrical setup (3 diodes) sounds more open, raw, and "amp-like."

3. Series RC Tone Control

The frequency response is managed by a Series RC (Resistor-Capacitor) network tied to a potentiometer.

The Mechanism: Instead of a simple "on/off" treble cut, this series configuration allows for a smoother sweep.
The Result: It provides a musical "tilt" to the EQ. At lower settings, it rounds off harsh highs for a warm jazz or blues tone; at higher settings, it allows the full clarity of the TL072 to shine through, helping your leads cut through the mix.

Why This Design Works

The TL072 provides the "hi-fi" foundation, while the 3-diode array provides the "lo-fi" grit. This contrast allows the pedal to remain transparent—meaning your guitar still sounds like your guitar—while adding the sustain and bite necessary for modern rock performance. It is a robust, reliable circuit that offers boutique-level tone with a classic, streamlined component list.

INQUIRY / PRE-ORDER : channel@medamps.com

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