Thank you for your reply…Adding the second arm with the Miyajima Infinity Mono made a big impact. Since it’s a true mono design it only responds to lateral groove movement. That resulted in a noticeable drop in groove noise, plus a jump in midrange presence, body, and overall tonal weight. Mono records just sound more alive and focused, with a richness that wasn’t there when using a stereo cart.
Thank you for your reply and also for taking the time to listen to my video!I’m finding it marginal with an 18μm spherical on a Decca against a Replicant 100 on an SPU plus the mono switch, more like different flavours. It wasn’t marginal when my stereo cartridge had a micro ridge stylus, that sounded quite lost in a mono groove. Listening to your recording it seems to have good body and scale and I don’t hear bacon frying in the background. I just wonder if I upped my mono game if it would pay off, given that I’m not willing to risk a cartridge with no vertical compliance.
- noice floor significantly reduced
- dynamics improved
- spaciousness (depth of field) improved at lot


Hi Urs,May I throw in one more contender of "True Mono“ cartridges ?
(Sorry – it belongs to the more costly varieties ...)
IKEDA 9Mono
See here for details.
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IKEDA Sound Labs 9mono MC Phono Cartridge — Audiophilia
For the past five years, I’ve lived with an excellent “true” mono cartridge (a single coil with sufficient vertical compliance to play both “modern” mono reissues and pre-1967 mono originals)—the hand-made Miyajima Labs Infinity Monaural MC Phono Cartridge (USD 3375). It performed its unique dutiewww.audiophilia.com
The IKEDA is the only "true mono" component, otherwise I’m using my normal stereo set up.
OK, my AMR-PH77 Phono-Pre sports a meagre 20 or so EQ-Curves., but for my usual MONO listening I’m actually only using about 3 or 4 of those.
Regards
Urs
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