Super Tweeters - Fact or Flights of Fancy?

[Barry]

If anyone is interested, I have four Coles 4001G super tweeters I would be willing to sell.

I'll put some information in Private Exhibitions.

Regards

[Rare Bird]

Are they black ones Barry?

[Barry]

Are they black ones Barry?

Yes. I've just had a look at them. The boxes are marked 4001L (not G as I stated in my post) and have 15 Ohm impedance.

Regards

[The Vinyl Adventure]

At the mention of impedance my brain goes plop,bang,fizz.... What do I need to take into account when trying to wire somthing in with my pmc's - without breaking my amplificators?

[Ali Tait]

15 ohms is fine Hamish.The higher the ohms,the easier the load on the amp.

[The Vinyl Adventure]

So would barry's coles with one of these lpads satisfy my imediate interest in what these supertweetas do, or would the maplins one do better, or be more worth while as a experiment
crap, I realy do know fuck all sometimes with this hobby,
how much are these coles things worth?

[Rare Bird]

Yes. I've just had a look at them. The boxes are marked 4001L (not G as I stated in my post) and have 15 Ohm impedance.

Regards

Are you sure? it's the 4001G has the nominal resistance of 15ohm, DC resistance of 23 Ohm.Not an efficient tweeter about 85db

[Barry]

Are you sure? it's the 4001G has the nominal resistance of 15ohm, DC resistance of 23 Ohm.

Hi Andre,

The boxes are most definitely marked 4001L. I bought them from a hydrographical survey company many years ago, as part of a now abandoned project. I think they used them for echo sounders. They claimed the speakers were 15 Ohms. I have the data sheet somewhere, I'll look it out and will measure the DC resistance.

Regards

[Rare Bird]

Never heard of the 'L' only 'G' (15-Ohm) & 'K' (7-Ohm)..Intresting

http://www.troelsgravesen.dk/vintageBC1.htm

[Rare Bird]

Been brought to my attention that the 'L' may be a plastic faceplate version of the 'G'! I never thought about that.

Hamish they have a frequency range that will reach 35KHz