Just won these on Ebay......

[Marco]

Oh, sorry, my mistake..... So the tweeters on the originals (on the left) are Celestion HF1300s?





So which model of tweeters are used on mine beside them - in fact, if you know, what are the differences in the drivers used overall on both designs, and why did they change them?

Where's Dave (DSJR) or hifi dave when you need them!

Marco.

[Rare Bird]

I forget the 'XR' tweeter model but the reason the 'HF1300' was inadiquate is it would only reach around 15KHz (i think, maybe 18kHz), most companies like Spendor with the BC1, B&W with the 'DM2/4' etc would use a combo of 'HF1300' & Coles '4001'... the coles tweeter alone has a spec that will reach around 35kHz...It's much cheaper i'd have thought to just make a soft dome & plonk it in a revised 15..

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

[Marco]

Cool, I see. So just to clarify, is the tweeter on the model on the left (in the pic above) a Coles or Celestion unit?

Do you know anything about the difference in midrange and bass drivers used on both models?

I'm just trying to learn as much as possible about the ones I've bought!

Marco.

[Rare Bird]

Cool, I see. So just to clarify, is the tweeter on the model on the left (in the pic above) a Coles or Celestion unit?

Do you know anything about the difference in midrange and bass drivers used on both models?

I'm just trying to learn as much as possible about the ones I've bought!

Marco.

Thats the HF1300 on the left speaker u pictured..

[Marco]

Cheers, dude. Therefore, I presume the tweeters used on the XRs were better in terms of them having superior high-frequency extension.......

I'm curious to know about the midrange and bass drivers used on both models.

Marco.

[Rare Bird]

Do you know anything about the difference in midrange and bass drivers used on both models?

The centre unit is a Bass/Midrange,different unit on each .original (your left pic) has a cast alloy baskets like the '44'... the bottom isnt a drive units it's an ABR (Aux Bass Unit). it has no electrical diaphram at all, Kef made one in the B139..

ps: Paul (Spendorman) is the guy you wanna talk to, the 60's era, coles etcs are his thing. He'll most probably agree that the Celestion 'HF1300'/Coles '4001' combo is probably the best sounding tweeter arrangement ever created

[Marco]

Ah, right-o - cheers. So they should have quite a 'meaty' sound then and decent bass heft for a speaker of that size?

And probably rather different from the toppy, anaemic sounding budget monstrosities sold these days!

Marco.

[Rare Bird]

Cheers, dude. Therefore, I presume the tweeters used on the XRs were better in terms of them having superior high-frequency extension.......

Yes but wouldnt sound as good as an 'HF1300' with Coles '4001')

[Marco]

Yep, gotcha - it'll simply be a trade-off, as with most things in hi-fi.

I'd imagine too though that the overall sonic presentation of the XRs will in certain areas offer something extra over the MK1s, otherwise Celestion wouldn't have completely revamped the drive units.

I certainly can't wait to hear them on the end of the kind of kit I use, which will be nothing like what they were partnered with in the 60s!

Marco.

[hifi_dave]

The tweets on the left are the Celestion HF1300 which was an excellent unit. The ones on the right look like Peerless or Audax.

They probably dropped the HF1300 because it was an expensive design.