C-MOD ™ Passive 2-Way 3500Hz Crossover (Rare NOS)

C-MOD Crossover Module | 3500 Hz | Rare "New Old Stock" (NOS)

The "Holy Grail" of Analog Crossovers: A Harrison Labs Original

This is a rare opportunity to own an authentic discontinued piece of Harrison Laboratories history. We have released a final, limited inventory of exactly 38 units of the original C-MOD Crossover Module produced in the 90’s. These are genuine New Old Stock (NOS)—discontinued for years but preserved in pristine, factory-new condition.

Originally engineered for high-end mobile audio and adopted by home audiophiles for its legendary transparency, the C-MOD represents the peak of American-made analog engineering from our Colorado facility.

Why It’s Sought After: Pure Engineering, No Saturation

The C-MOD is a two-channel, 2-way 12dB per octave speaker-level crossover. What sets it apart for collectors and purists is the use of ferrite rod core inductors. Unlike standard crossovers, these inductors are designed not to readily saturate at high power, ensuring your audio remains crisp and distortion-free even when pushed to the limit.

• Precise Frequency Splitting: Optimized for 4 Ohm systems at 3500 Hz, providing a seamless transition between your Mid/Low drivers and your Tweeters. (Note: In 8 Ohm systems, the crossover point is 2500Hz)
• High Power Tolerance: Rated for 100 Watts per channel, making it a robust choice for both vintage restorations and modern high-fidelity setups.
• Balanced Architecture: The negative (-) or common terminals are not connected between the left and right channels. This "discrete" design allows for use with balanced speaker output terminals that are not grounded, while remaining fully compatible with common grounded amplifier outputs.

Key Selling Points & Features

• LED Maximum Power Indicator: A built-in safety feature that lights up prior to power overload, giving you a visual warning to protect your drivers from clipping.
• Premium Connectivity: Features heavy-duty gold-plated speaker terminals for maximum signal conductivity and corrosion resistance.
• Smoked Polycarbonate Cover: Each unit includes a signature smoked cover that snaps on and off, protecting the internal components while maintaining a sleek, professional aesthetic.
• Zero-Noise Analog Path: A simple, elegant passive design that avoids the electronic "hiss" and "veil" of modern digital processors.
• Designer Heritage: Genuine Made in U.S.A. hardware designed by the owner of Harrison Labs.

Technical Specifications

• Type: 2-Channel / 2-Way Passive Crossover
• Crossover Point: 3500 Hz (at 4 Ohms)
• Slope: 12dB per Octave
• Power Rating: 100 Watts per channel
• Inductors: High-saturation resistant Ferrite Rod Cores
• Terminals: Gold-Plated with +/- Phasing Labels
• Chassis: Includes removable Smoked Polycarbonate Cover
• Status: Rare Vintage New Old Stock (NOS)

Official Wiring Guide (Left to Right)

• LEFT: Mid/Low Pass Out (-) / (+) | Speaker Input (-) / (+) | High Pass Out (-) / (+)
• RIGHT: High Pass Out (+) / (-) | Speaker Input (+) / (-) | Mid/Low Pass Out (+) / (-)

Purchase Policy: These units are priced for closeout and represent the final 38 pieces of original stock. All sales are final.

MADE IN THE USA🇺🇸