cartiage for Kenwood L07D genuine tone arm

Buy the LO7D if in good order and you can afford it.

Here's a website all about the Kenwood L07D including the specs on the tonearm:

On that site you'll find:

"Tonearm effective mass is rather high at 17g. and will therefore be better suited to medium (between 10-µ/mN and 20-µ/mN) and low (less than 10-µ/mN) compliance cartridges."

When you examine specs of most cartridges today (anything from budget MM to cost-no-object LOMCs, you'll find that most compliance specs fall between 10 and 20µ/mN. For example, a $75 Grado Black has a compliance of 20; a $15,000 Clearaudio Goldfinger has a compliance of 15. According to the Kenwood specs and that website, both carts would be good compliance/resonance matches for the Kenwood L07D arm.

If I used a higher compliance cartridges, for example, Van del Hul Frog ( 35 Micron/mN ); what's wrong with it?

08-09-15: Jagdzaku
If I used a higher compliance cartridges, for example, Van del Hul Frog ( 35 Micron/mN ); what's wrong with it?

Compliance is how flexible the cartridge's suspension is. The higher compliance, the more readily it "wiggles," which should correspond to the effective mass of the tonearm. The higher the compliance, the less the tonearm's effective mass should be; the lower the compliance, the heavier the tonearm's effective mass should be.

The combination of tonarm effective mass and cartridge compliance always creates a resonant frequency. This resonance should be between 8 and 12 Hz, ideally 10 Hz. A lower resonant frequency can cause "woofer pumping" and rob the music of a good bass. It can also make the tonearm more prone to jumping the groove. A resonant frequency above 12 Hz starts to interfere with audible bass.

Here is a cartridge/arm calculator. For effective mass, you combine the effective mass of the tonearm plus the weight on the cartridge. In the case of your 17g Kenwood arm plus 8.2g Frog, that's an effective mass of 25.2g. Compliance is 35. Enter those numbers, click "Calculate" and you get a resonant frequency of 5.359Hz, which is way low.

Use the second calculator to find an ideal compliance for ideal resonant frequency: For example, if you have a 6g cart mounted to the Kenwood tonearm, you have 23g effective mass. For an ideal 10Hz resonant frequency, you'd want a compliance just above 11. Altogether, the "safe" 8-12 Hz range allows compatible compliance from 7.648 (@12Hz resonance) to 17.2 @8Hz resonance.