According to this web site, it appears that the DL 102 was not actually designed for playing mono records but was intended for mono playback of stereo LPs in radio stations and transcription studios.
Denon DL 102 Instruction Sheet
This would seem to make it less than ideal for the best fidelity when used for playback of mono LPs through a stereo system. As there is a single mono output, it will work best with a purely mono (single channel) system downstream. Also, if the 102 is like the 103 family it is not the best match for the JMW arm.
I would suggest that a dual mono cartridge would be a better choice. Personally I would recommend the Soundsmith SMMC-3 mono setup for medium compliance. But there are other manufacturers that offer similar carts.
Denon DL 102 Instruction Sheet
This would seem to make it less than ideal for the best fidelity when used for playback of mono LPs through a stereo system. As there is a single mono output, it will work best with a purely mono (single channel) system downstream. Also, if the 102 is like the 103 family it is not the best match for the JMW arm.
I would suggest that a dual mono cartridge would be a better choice. Personally I would recommend the Soundsmith SMMC-3 mono setup for medium compliance. But there are other manufacturers that offer similar carts.