Ortofon SPU Mono GM MkII

No. Because this is a high-output moving coil cartridge, it is designed to work directly with standard moving magnet phono inputs, eliminating the need for additional transformers.

This cartridge is specifically optimized for early 25µm mono recordings. While it will play modern mono pressings, those are typically cut with a narrower groove profile, so you may find better results using a standard stereo cartridge or a dedicated mono cartridge with a smaller stylus tip.

The SPU Mono GM MkII is quite heavy at 28 grams, so you must ensure your tonearm can balance this weight. It is designed for use with tonearms that accept the standard SME-style headshell mount.

The 25µm radius is the standard size used for early mono vinyl records. Using a stylus of this size allows the needle to ride higher in the groove, avoiding the noise and distortion that can occur if a smaller, modern stylus tip bottoms out in the groove of an older record.

The ground wood and resin composite body is chosen for its excellent damping properties. It effectively controls unwanted resonances, resulting in a cleaner, more stable, and warmer sound profile compared to standard plastic or metal housings.

The recommended tracking force range is 3.0 to 5.0 grams. We suggest starting at 4.0 grams and adjusting slightly based on your specific tonearm and the condition of your records to find the best balance of stability and fidelity.