VinBob wrote:Brf wrote:VinBob wrote:Thanks for the feedback all - So the question still remains, am I using the correct value of '12' for the compliance parameter for the calculator on Vinyl Engine even though the Lyra specs are based on 100Hz and not 10Hz as required on the Vinylengine tool?

Cheers,

Vincenzo.

The VE calculator assumes that the quoted cartridge compliance is referenced to 10Hz. The Lyra Delos compliance is referenced at 100hz. You need to convert the Lyra compliance to 10hz. A general rule is 1.5 to 2 times the 100hz figure to approximate the 10hz.

12x10⁻⁶Cm/Dyne @100hz = 18x10⁻⁶Cm/Dyne to 24x10⁻⁶Cm/Dyne @10hz

1) At 18x10⁻⁶Cm/Dyne and using 17.3g (eff. mass + cart weight + fastener weight)

Resonant Frequency: 158 / sqrt(311) = 8.95 hz

2) At 24x10⁻⁶Cm/Dyne and using 17.3g (eff. mass + cart weight + fastener weight)

Resonant Frequency: 158 / sqrt(415) = 7.75 hz

Potential resonance frequency: 7.75 to 8.95 Hz

You're fine!

Brf - Is there any way for me to increase the resonance by using a lighter counterweight which I would assume will end up closer to the pivot point. I believe the ideal value for me would be at the 10Hz range and especially to help with my subsonic low frequency speaker pumping issues, but not sure how to get there without changing my tonearm or cartridge, which I want to avoid...

Thanks in advance.

Vin.

Vin, using a lighter cw actually moves the cw away from the pivot point which "may" increase the arm's effective mass depending on how the initial calculation was performed. If you want to increase the resonance frequency up a bit, use the lightest mounting hardware possible.

Personally, I would not worry about it as the calc is an approximation, not an exact science and you are within target.