At Frotronics, we bring legendary Crown amplifiers, preamplifiers, and the equalizer back to factory specifications and beyond. Preserve the power and precision of your vintage Crown audio gear with professional restoration.

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Known for their industrial-grade build and bulletproof reliability, vintage Crown gear requires specialized technical knowledge to truly shine. Whether you own a classic DC300, a Straight Line preamplifier, or another model our expert team in Vermilion, Ohio, provides precision diagnostic, repair, and recapping services. We safely serve audiophiles nationwide through mail-in service, ensuring your treasured Crown equipment delivers peak sonic performance for another 40+ years. Vintage Crown amplifiers, preamps, and equalizer are legendary American-made workhorses, but aged capacitors, transistors, and drifted resistors and diodes can degrade their iconic sound. Also if your Crown equipment has low output, distorted channels, or hasn't been powered on in decades, we provide precision diagnostics, bench testing, and full component recapping. Our technicians specialize in solid-state component overhauls, meticulously rebuilding your gear to original factory standards.  We expertly serve audiophiles nationwide so pack it safely, ship it to our lab, and let us restore the massive headroom and clarity your Crown system was born to deliver.

 

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                           Models We Expertly Service

 

Power Amplifiers

• DC-300 / DC-300A – The legendary high-power flagship.

• D-45 / D-60 / D-75 – Ultra-reliable, compact studio classics.

• D-150 / D-150A – The perfect balance of power and fidelity.

• PS-200 / PS-400 – Robust, high-headroom sonic workhorses.

 

Preamplifiers & Signal Processors

• IC-150 / IC-150A – Vintage control centers revived for modern clarity.

• Straight Line One (SL-1) / Two (SL-2) – Minimalist, high-performance preamps.

• EQ-2 Graphic Equalizer – Precision tone-shaping restoration and calibration.

 

All other models please contact us.

 

 

                             Our Vintage Crown Process

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• Complete Recapping: Replacing dried-out, aged capacitors to restore low-end punch and lower the noise floor.

• Complete Semiconductor Replacement: Replacing diodes, resistors, ceramic disc caps, film caps, and other components is imperative with modern upgraded components.

• Component Matching: Sourcing and matching tight-tolerance transistors to eliminate channel imbalance.

• Controls Restoration: Deep cleaning and lubrication of scratchy pots, switches, and sliders.

• Safety & Calibration: Setting idle bias, DC offset, and stress-testing under a simulated load for rock-solid stability.