series capacitor voltage rating

[dougr]

apologies for the repost from 'parts'...

I've done some reading regarding various capacitor types and browsed pricing... I'm playing around with some very small boxes (2.2L) for CHR-70 (4" full-range), and have seen others mention a cap in series with the driver to attenuate the bass bump and extend the F3 a smidge lower in the process. Thought I'd give it a listen for kicks. Can anyone give a little guidance in selecting the proper voltage rating? Price will limit my selection to electrolytic (and polymer electrolytic) between 300-330uF. The drivers are rated at 20W 7.2 Ohm Re. They'll be driven by an integrated amp based on the TI TAS5630, which specifies supply voltage to 50V (no idea what the manufacturer actual supplies the chips). Any advice on appropriate voltage rating for the cap would be appreciated... any thoughts on polymer electrolytic vs std would be welcome as well... currently leaning towards Elna RFS (SILMIC II) 330uF (or combination of other sizes if >63V is warranted).

[dougr]

Originally Posted by dougr

currently leaning towards Elna RFS (SILMIC II) 330uF (or combination of other sizes if >63V is warranted).

that is IF bipolar versions of RFS are available in small quantities... seeking other options given lack of availability of discontinued RBS in larger sizes (bipolar version of ROS SILMIC I) and no apparent source for their replacement.

[j.michael droke]

Originally Posted by dougr

apologies for the repost from 'parts'...

... I'm playing around with some very small boxes (2.2L) for CHR-70 (4" full-range), and have seen others mention a cap in series with the driver to attenuate the bass bump and extend the F3 a smidge lower in the process. Thought I'd give it a listen for kicks........ Price will limit my selection to electrolytic (and polymer electrolytic) between 300-330uF. The drivers are rated at 20W 7.2 Ohm Re.... currently leaning towards Elna RFS (SILMIC II) 330uF (or combination of other sizes if >63V is warranted).

Hi there: Google-up Partsexpress.com catalog page 159, 100v non polarized crossover capacitors. PE lists 100v, non-polarized capacitors from 1uf through 500uf, 320 and 330 uf cost about $4.60 each + shipping. How did you calculate size required? ....regards, Michael

[dougr]

thanks... size from here using CHR-70-mk3 specs in 2.15L box:

.:12vhifi.nl:. alles over Car Audio & Techniek (recommended by Hankjen in some of the CHR-70 threads)

result: 308.4uF