With slow baby steps I am going ahead with two sadhara-cubes.
Sealed design. 30 litres netto. Linkwitz transform down to 12Hz (natural resonance of the sealed design would be 42Hz).
Today I made some first measurements in order determine the
required power of the amp. I feel comfortable with +/-20mm excursion, or little more. The drivers are specified with a linear excursion of +/-27mm. (Well I measured bottoming at +/-25mm in one driver and +/- 28mm in the second driver)
For a 20Hz signal, I found that I will reach +/-20mm excursion already at 142V pp .
The required power was just around 390W. I had expected that I would need about double of the power.
Really nice! This will make the design of the class D amp and the SMPS easier.
Here a pic of one cube.
Sealed design. 30 litres netto. Linkwitz transform down to 12Hz (natural resonance of the sealed design would be 42Hz).
Today I made some first measurements in order determine the
required power of the amp. I feel comfortable with +/-20mm excursion, or little more. The drivers are specified with a linear excursion of +/-27mm. (Well I measured bottoming at +/-25mm in one driver and +/- 28mm in the second driver)
For a 20Hz signal, I found that I will reach +/-20mm excursion already at 142V pp .
The required power was just around 390W. I had expected that I would need about double of the power.
Really nice! This will make the design of the class D amp and the SMPS easier.
Here a pic of one cube.