Upgrade your speakers. Elevate your system.

Our DIY Modification Kits are designed to improve clarity, balance, and overall performance — helping your loudspeakers reach their full potential.

Each kit includes a schematic and all required crossover components, wire, and accessories.
Prices are listed per pair unless otherwise noted for center-channel speakers.

Speakers and mounting boards are not included.
For additional details, please visit our FAQ or contact us directly.

Do Parts Matter? Absolutely.

If you’ve ever wondered why some loudspeakers sound clearer, faster, and more engaging than others, the answer often lies in the quality of the crossover components. In this informative video, Danny Richie explains how capacitors, resistors, inductors, wiring, and connectors in the signal path can directly influence clarity, detail, dynamics, and overall musical realism.

Many commercially produced speakers use cost-driven parts choices that can limit performance. By upgrading to higher-quality components — such as premium capacitors, non-ferrous resistors, and low-distortion inductors — it’s possible to unlock a level of transparency and refinement that the original design may never fully reveal.

This video helps illustrate why GR-Research upgrade kits are engineered with carefully selected, high-performance parts, and how thoughtful crossover improvements can deliver meaningful sonic gains without replacing your entire loudspeaker system. If you’re considering taking your speakers to the next level, this is an excellent place to start.