P-6.5 Passive radiator 17,5 cm / 6.5 ”with variable weights

Attention:
The screw at the front and the nut directly at the back of the membrane are firmly glued – please do not remove!
The effective membrane weight can now be adjusted with the 3 discs. For special fine tuning you can cut use smaller disk or screw or other weights.
When tuning by ear, firstly test with 3 discs. For lighter and smaller main speakers, reduce the discs until the low bass sounds best.
When tuning according to the measured impedance curve, both impedance maxima should be the same.
10 cm loudspeakers are combined with P-6.5 without disc, 13 cm loudspeakers and lighter 16 cm diaphragms fit 1-2 discs.

Rule of thumb:
Heavy passive membrane = balanced and deep bass – lighter passive membrane = louder, but not so deep bass.
For 2-3 weights, we recommend turning the P-6.5 by 180 ° every year, so that the rubber edge is loaded more evenly