Hi,
In your opinion is it a joke?
http://cgi.ebay.it/Plasma-tweeter-s...84432976QQihZ011QQcategoryZ3284QQcmdZViewItem
Cheers,
Paolo
In your opinion is it a joke?
http://cgi.ebay.it/Plasma-tweeter-s...84432976QQihZ011QQcategoryZ3284QQcmdZViewItem
Cheers,
Paolo
Hi,
well the seller won´t regard it as a joke and it might in praxi even work sufficiently, but --and this is a big but-- besides the problem bear already mentioned, there are at least two more problems.
The first is: how and how often to replace the electrode
and second: where to place the thing? Every designer of decent speakers places the drivers in close proximity to each other to cope with phase issues. The shown plasma won´t allow for this. So, independent of the sheer driver´s sound qualitity, this completely impractical design renders itself rather useless. It´s a nice gimmick for show and tell, but no serious driver for a firstclass loudspeaker....that´s all.
jauu
Calvin
well the seller won´t regard it as a joke and it might in praxi even work sufficiently, but --and this is a big but-- besides the problem bear already mentioned, there are at least two more problems.
The first is: how and how often to replace the electrode
and second: where to place the thing? Every designer of decent speakers places the drivers in close proximity to each other to cope with phase issues. The shown plasma won´t allow for this. So, independent of the sheer driver´s sound qualitity, this completely impractical design renders itself rather useless. It´s a nice gimmick for show and tell, but no serious driver for a firstclass loudspeaker....that´s all.
jauu
Calvin
I strongly recommend, to be critical reading this link mentionned above
http://www.plasmatweeter.de/eng_plasma.htm
Why?
Ulrich Haumann made a mistake by adapting the circuit from DuKane and used wrong voltages.
He has overseen that the psu from DuKane was driven by 117V and not 230V
And you can find many rebuilders, doing the same error.
O.K., the PL509 can stand the Haumann 600V, but does it sound good?
Smile
Franz
/Edit: be also critical with this original circuit: there is no tranny at the input of the psu and therefore no galvanic separation!
http://www.plasmatweeter.de/eng_plasma.htm
Why?
Ulrich Haumann made a mistake by adapting the circuit from DuKane and used wrong voltages.
He has overseen that the psu from DuKane was driven by 117V and not 230V
An externally hosted image should be here but it was not working when we last tested it.
And you can find many rebuilders, doing the same error.
O.K., the PL509 can stand the Haumann 600V, but does it sound good?
Smile
Franz
/Edit: be also critical with this original circuit: there is no tranny at the input of the psu and therefore no galvanic separation!
Hi guys,Calvin said:Hi,
and second: where to place the thing? Every designer of decent speakers places the drivers in close proximity to each other to cope with phase issues. The shown plasma won´t allow for this. So, independent of the sheer driver´s sound qualitity, this completely impractical design renders itself rather useless. It´s a nice gimmick for show and tell, but no serious driver for a firstclass loudspeaker....that´s all.
jauu
Calvin
I am in total agreement here. To not talk about the diffraction effects of that "stuff" all around !
Cheers
Paolo
Javachip said:Does "150,00 Euros" mean 150 Euros, i.e. about US$190 per tweeter?
Yes, those silly Europeans like to use commas as decimal separators instead of periods.
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
- Home
- Loudspeakers
- Planars & Exotics
- plasma on e-bay