Ortofon 2M 78 Verso Moving Magnet Cartridge

Choosing the Ortofon 2M 78 Verso for bottom-mount tonearms

The Ortofon 2M 78 Verso is a mono cartridge built for turntables that mount the headshell from underneath rather than from above, and it's designed for playing 78 rpm shellac records rather than standard vinyl. Buyers running one of these bottom-mount arms need a cartridge shaped for that fitting, and the 2M 78 Verso covers that requirement within the wider 2M Series. It suits owners who want a cartridge matched specifically to shellac's wider, deeper groove profile rather than a general stereo cartridge run in mono. The 2M 78 Verso addresses this with tracking geometry set for 78s and a mono-specific output, both covered below.

How does the 2M 78 Verso track 78 rpm shellac grooves?

The 2M 78 Verso fits a spherical diamond stylus with a tip radius of 65 µm, larger than the tip fitted to cartridges built for standard vinyl. Shellac's wider groove profile needs that larger contact radius to sit correctly in the groove wall; a narrower stylus, such as an elliptical or line-contact type meant for microgroove records, would ride too low and pick up extra surface noise while wearing the groove unevenly. The 2M 78 Verso keeps the stylus riding at the correct depth in a 78 groove through this profile, which supports accurate tracking and cuts down on wear across repeated plays. It carries a recommended tracking force of 1.8 g, within a permitted range of 1.6 to 2.0 g, and a tracking ability rated at 70 µm at 315 Hz.

How does the 2M 78 Verso produce true mono sound on a stereo system?

The 2M 78 Verso delivers a strapped output, meaning both sets of pole pins carry the same signal instead of two separate channels. This removes the need for a dedicated mono phono stage or mono switch: because the signal on both channels is identical, a standard stereo phono input reproduces it as mono without extra equipment. The 2M 78 Verso outputs 4 mV at 1 kHz, 5cm/sec, with an internal DC resistance of 700 Ohm.

Where does the 2M 78 Verso sit in Ortofon's 2M Series?

The 2M 78 Verso is one of four mounting variants in the 2M Series, each aimed at a different tonearm fitting. The standard 2M suits the mounting used by most turntables on the market; the 2M Premounted is built for direct, tool-free fitting on S-shaped tonearms; the 2MR is sized for the low-form-factor headshells used by Rega and similar tonearms; and the 2M Verso, including this 78 rpm version, is built for bottom-mount headshells. Buyers deciding between variants should match the option to their tonearm's mounting style first: the mono, 78-specific stylus and output described above stay the same across the 78 rpm range, and it's only the mounting geometry that changes between variants.

Will the 2M 78 Verso match your tonearm's mass and compliance?

The 2M 78 Verso carries a compliance of 18 µm/mN dynamic lateral, which sits in the moderate compliance range and needs matching against tonearm mass to keep the combined resonance frequency within the working 7 to 12 Hz band. A resonance frequency outside roughly 6.5 to 14 Hz risks an unstable or poorly performing system, so it's worth running the numbers before buying rather than after. The 2M 78 Verso weighs 7.2 g on its own, or 16.7 g including the premounted hardware, figures a buyer needs when checking effective tonearm mass against a resonance formula.

What does fitting or replacing the Ortofon 2M 78 Verso involve?

Fitting the Ortofon 2M 78 Verso is a sequence-driven job rather than a simple drop-in swap, because the bottom-mount design changes the usual fitting order. The stylus comes off first, with its protection guard left in place to avoid damaging the diamond, and the top plate is released using a Torx 8 key on its retaining screw. Since the cartridge mounts from underneath, the top plate gets flipped 180 degrees and refitted using M2.0 mm screws before the stylus goes back on. It's worth having the Torx 8 key and the enclosed mounting tool ready beforehand, since the process differs from fitting a standard top-mounted 2M cartridge.