Kaltro 8" - do you kow this driver? - diyAudio
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Old 16th December 2012, 01:40 PM   #1
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Default Kaltro 8" - do you kow this driver?

Hi Guys

I bought a pair of Kaltro "High Compliance Speakers" Model FR-8; 8 ohms; input 15 watt speakers for AU$25 at an audio bring-n-buy on Saturday.

They remind me of Fostex drivers? (1) could anyone give me a little history on them! and (2) what do you think a good cabinet might be ... all that comes to mind is the Dallas!
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Last edited by greenie512; 16th December 2012 at 05:51 PM.
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Old 16th December 2012, 07:45 PM   #2
VaNarn is offline VaNarn  Australia
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Kaltro speakers were distributed by Radio Parts P/L in Melbourne in the '70,s. If they cannot supply data, then the T S parameters need to be measured in order to suggest a suitable enclosure.The cloth roll surround may have dried out and could benefit from a softening/recoating treatment.
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Old 16th December 2012, 11:09 PM   #3
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Quote:
Originally Posted by VaNarn View Post
Kaltro speakers were distributed by Radio Parts P/L in Melbourne in the '70,s. If they cannot supply data, then the T S parameters need to be measured in order to suggest a suitable enclosure.The cloth roll surround may have dried out and could benefit from a softening/recoating treatment.
Thanks for the info. Surrounds look good but like the idea of softening/recoating treatment - what would you suggest?
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Old 16th December 2012, 11:39 PM   #4
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I had a pair (Sold them on to another member from Tassie I think) I could never find on line TS figures but while they have a nice clean sound they CANNOT handle more than 5 real watts full range. I blew a single driver in 30 seconds playing around with a tiny amount of 100hz bass boost and that was in a 19 litre sealed and stuffed box. There is another thread where I asked the same questions about 3 or 4 years ago. Make sure you high pass them at least second order electrical above 200hz, 300 may be better. From memory they go quite high cleanly so a super tweeter above 12/15k may be needed Funny; one of my drivers had a scratch in exactly the same place on the label
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Old 16th December 2012, 11:47 PM   #5
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Just looked in my notebook Greenie; only notation is X-Max, is only 1.2mm and I don't know where I got that from, my note says I should use it above 200 with a 12 inch woofer so efficiency must be excellent
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Old 17th December 2012, 01:01 AM   #6
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Thanks Moon .... will be careful about the low end
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