What old Audax tweeter is this?

[jawen]

It´s 135 mm
Mark´t 8-9 ohm at the backside, but no modelnumber.

Regards John

 

[Andersonix]

'2450' faintly?

 

[Dave R]

It may be a HD13D34 H (spec sheet attached).
Current model TW034X0 is noted to be a replacement.

 

[markbakk]

Audax even had a 37mm dome back in those days. Tape measure?

 

[Audio>X]

Fascinating ...
It kind of makes me think about how large/wide those very old KEF aluminum dome tweeters were 🙂

 

[jawen]

'2450' faintly?

Does not understand what you mean?
JBL 2450?

 

[jawen]

It may be a HD13D34 H

Thanks Dave

Its strange becouse the HD13D34 H i have found seems to look "different" even if its HD13D34 H?

 

[jawen]

Audax even had a 37mm dome back in those days. Tape measure?

Its for sale in Sweden, but seller dont have any knowlege (probably from a wife to a deceased hifi husband)
37 mm dome sounds nice!

 

[markbakk]

My guess? You posted the 37mm. See the dome size compared to pictures of the HD34. I guess I have one or two of those lying around. But they're ooold!

 

[jawen]

My guess? You posted the 37mm. See the dome size compared to pictures of the HD34. I guess I have one or two of those lying around. But they're ooold!

It most be this one, Audax HD 13D 37-8 Ohm, dont you think?

https://www.sicken.ch/pi/en/Mitteltoener/Audax-HD13D37-8Ohm.html

https://en.toutlehautparleur.com/media/catalog/product/datasheet/audax/HD13D37J-8.pdf

 

[Andersonix]

Does not understand what you mean?

It has '2450' printed on it.

 

[tojoko]

When they are old Audax, the foam underneath the dome will have deteriorated and dirt will be in the magnet where the coil will be hindered to work properly, open it up and clean it, remove the foam and put new damping behind the dome, i've done that, now they work fine again...

 

[jawen]

Audax HD 13D 37-8 Ohm

Seems also as Audax TW037YO is the same.
Used in Infinity Quantum, Spendor, Rogers and BBC monitors.

But maby not good for today´s criteria?

 

[markbakk]

They are ok for fooling around. I see not much use for these. Don’t get near to 20k…