making a driver into a coax?

[nerd of nerds]

HELLO! i just finished a pair of speakers (well...i built 5 boxes...yay for 5.1!) with the mcm 55-1870 drivers...they are a little lacking in the highs and i don't have much room on the boxes to add tweeters...unless i used some REALLY tiny ones...

so i was wondering if it was possible or hard to make them into coax driver? i have googled and the like but haven't found and REALLY good rescources...sooo...can you guys help me? thanks!

[bhg41088]

look up the CDT braxial series. Interesting and fairly good looking solution.

http://mainstreet-audio.com/cdtaudio/images/HD-53.jpg

[Timn8ter]

I fooled around with this a little but haven't gone back to it yet. Sounded pretty good for a prototype.
http://www.alegriaaudio.com/coral_op...le_project.htm

[nerd of nerds]

hmmm...that seems like a pretty good idea...but this is a 5" speaker... so i'm thinkin that the tweeter is still gonna have to be tiny...any recomenations?

and could i just affix it with a dowel rod?

EDIT: maybe i could build a matching enclosure that i could just set on top of the box?

[Timn8ter]

Go to your local Radio Shack store and ask them to look up a model 40-1310 supertweeter. If they don't have it ask them to look up the stores in the surrounding area. They should be on clearance for $9.97 (at least they are here). It's intended to be an add-on tweeter in it's own enclosure and stand that sits on top of an existing speaker. It comes with a built in 2nd order XO set at 5Khz but you can easily remove it and add your own. I just used a single cap and padding resistor. Works great.

[nerd of nerds]

Originally posted by Timn8ter
Go to your local Radio Shack store and ask them to look up a model 40-1310 supertweeter. If they don't have it ask them to look up the stores in the surrounding area. They should be on clearance for $9.97 (at least they are here). It's intended to be an add-on tweeter in it's own enclosure and stand that sits on top of an existing speaker. It comes with a built in 2nd order XO set at 5Khz but you can easily remove it and add your own. I just used a single cap and padding resistor. Works great.

HOLY CHEESE! they wanted to charge me 20 bucks a few months ago...maybe it was longer ago...

[bhg41088]

what about that hivi that looks like a bullet at PE?

[nerd of nerds]

i'd REALLY like to stay away from mounting the tweeter on the very top of the box...i just think that it looks ghetto...

i do remember seeing a speaker somewhere where the tweeter was mounted under the dustcap...but i don't think i could find anything small enough...

[bhg41088]

madisound has a 10mm tweeter, its the Audax TM010A39.

[planet10]

Originally posted by bhg41088
madisound has a 10mm tweeter, its the Audax TM010A39.

But the actual diameter is more like 35mm -- ApexJr has a version of this tweeter that can be carved down (if you don't want the mounting tabs) and stuck on a dowel attached to the (duscapless) polepiece ala the PHY-HP.



And i know he has a special price on these for diyaudio (the post has been moved to the Audio Vendor's Bazaar which should become visible any time now).

dave