Visaton Kit

[jn229]

Need help with this Visaton kit. The woofer's crossover values show a capacitor with a value of 3 x 470uf. Does this sound right? Would you use non polarized caps?

La Belle

Thank You

 

[mondogenerator]

Yes. All of the 470uF and 150uF in the woofer circuit are Non polarised electrolytic capacitors. The rest are film i believe.

 

[jn229]

Yes. All of the 470uF and 150uF in the woofer circuit are Non polarised electrolytic capacitors. The rest are film i believe.

Thanks for your reply. It just seemed that 1410uf in series is a lot of capacitance.

 

[planet10]

That big cap is to roll off the extreme bottom of the woofer.

dave

 

[jn229]

That big cap is to roll off the extreme bottom of the woofer.

dave

Thanks Dave, looks like this may be a design I'll attempt.

 

[xjr100]

Yes. All of the 470uF and 150uF in the woofer circuit are Non polarised electrolytic capacitors. The rest are film i believe.

Not all of them are film, "ELKO Special" are electrolytics.

 

[koja]

more Visatons around

interesting choice. my next project will be B200s on OB, biamped w/F5s with bass support. right now I am still working on a pair of Joe R's Elsinores so probably by Fall time I'll get the other project underway 😉. pls come back and share your listening impressions once your speakers are done. cheers, Sonny

 

[mondogenerator]

Not all of them are film, "ELKO Special" are electrolytics.

you're right, I missed that. 😀

 

[Rudolf]

interesting choice. my next project will be B200s on OB ... . pls come back and share your listening impressions once your speakers are done. cheers

The comparison will not help you. The applications are too different. Except you limit the B200 to midrange duties in OB too.

Rudolf

 

[mondogenerator]

the trouble with that kit, is the sensitivity of the TIWs.

 

[jn229]

the trouble with that kit, is the sensitivity of the TIWs.

What is 'TIWs'; does this mean twin woofers? I have noticed that the system is not very efficient and it concerns me. Is this concerning to you also?

 

[mondogenerator]

sorry. My comment was unclear. What i mean is that the TIW200XS 8inch subs are rather inefficient at 84dB, which limits the efficiency of the whole design. That may not be an issue for you at all, unless you are planning to use a low wattage amp, like a small valve amp. I pointed it out just because the B200 is quite efficient in comparison and used as Ive seen in most cases (fullrange) the efficiency is what attracts many to it. Again, none of this is necessarily a problem for you, unless you use a 5 watt amp.

In other words, the Lpad resistors in the B200 filter are required to match the driver efficiencies. However, a practical upshot is that the B200 shouldnt become stressed with all that resistance there.