I use them for 3 years and they always work.
filters is shit, the components desoudent I change the filters against eminence [pxb2 1K6-3113-s 1.6 kHz. 8 ohm 400w rms] 59 euros the unit. Now more than ca problem running 16 hours continuously without a break.
Just Fine! [200 euros] the unit even if we add the two filters eminence.
note 7 for the filter of shit [original]