cartiage for Kenwood L07D genuine tone arm

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.

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.

Any and all low frequency "rumble filters" that I've tried robbed the musical presentation of a solid foundation and much of the life of the music.

Those LF filters were mostly for attenuating the "rumble" or motor noise of idler-driven turntables, and not for taming bad arm/cartridge mismatches, which can affect things (such as tracking) long before the result would reach the speakers.

09-27-15: Jagdzaku
I received turntable last weekend
According to manual,I found the sub weight should be attached to the arm for the cartridge heavier than 9g
Does it change the effective tone arm mass?

No it doesn't. The effective mass is the mass or weight of the tonearm from its pivot to the headshell.

The extra counterweight enables you to balance a heavier cartridge. The counterweight doesn't add effective mass, but the cartridge does.

You have to factor in the weight of the cartridge plus teh tonearm's effective mass to arrive at the total effective mass.