Axiom Home Page Forums General Discussion Technical Questions Upgraded tweeter for M22 speakers,anyone done this

Love my M22's but was wondering if anyone could suggest a replacement tweeter that would basically be just a "drop in" w/o having to mess w/ the crossover

Basically I want to experiment w/ a tweeter w/ a higher top frequency response.

Any ideas?

TIA

Ex, I think you'd have to acquire the specs on the existing M22 tweets before you could make a swap for another tweeter. I'm not sure if Axiom would be willing to provide this info or not, you'd have to ask them. Otherwise, it would be kind of trial-and-error...

This might work. I seem to remember a conversation that took place here a LONG time ago about this tweeter being similar to Axiom's...it's not the same, but it looks like it.

Thanks for the advice guys.
I kinda figure they won't give me the specs
The parts express tweet doesn't have the extended high end freq response I'm looking for.

Expat, I doubt you'd hear any difference with anything >20KHz (frankely, I'd be amazed if you could hear anything over 16KHz...), but if you want to experiment, there are some companies that make external supertweeters. I'd go that route rather than replacing tweeters in your M22s.

Expat, why are you looking for a FR above 20K?

Just to see if it's a noticeable improvement in the speaker

I have some Cantons that go higher than the M22's and I really dig that tweeter more than the M22's

So just looking to try it out

Don't want sep supertweets but thanks for the suggestion

If I ever get the time (and money), I've been wanting to buy speakers and just try different approaches to see what I can come up with. I've been wanting to do this for about a year before I bought my first Axiom speaker.

They used to make some strange round cylinder shaped speakers called Linear Array Transducer for bass, but it looks like they've discontinued them now. A website that I've looked at several times is Madisound.

You could always try a ribbon tweeter but again, you need to know specs, otherwise you'd need to modify the crossover, never mind flange sizes and mounting hole pitches ect..

I know I can hear well over 20khz, according to the online listening test someone posted a while back(Peter?). At 16khz, my hearing 'seemed' to start improving. My name was Rover, in a previous life.

He brings this story up every opportunity he can.

Like a dog with a bone, I tells 'ya!

Brian, I've looked at those before. They are a type of subwoofer made by Tymphany(Peerless, Vifa).

Thanks guys!

I was hoping someone here had done it so I wouldn't have to figure the hard stuff!

Guess I'll let it lie for now

I'm the first person to say that I want 192 kHz sampling for all my digital audio sources, or a minimum a 384 kHz master with a 96 kHz mix for distribution.

But the tweeter only needs to go to the edge of human hearing.

Extra information in the digital signal is not to extend the upper frequency response, but to limit aliasing in the audible range.

Considering most every CD and movie soundtrack is mixed at 48 kHz the only information above 20 kHz is noise-shaping by the DAC.

You might pm either Ian or Andrew at Axiom and ask them for either the specs OR a possible alternative, anyway...the worst that could happen is they send Noreen out to kneecap you.

Adrian, if you can hear anything at 20 KHz and above you have unusualy hearing. Most men's hearing goes south startin in the late teens. You're not one of those 16 year olds pretending to be a real man are you?

Actually, based upon his supposed hearing range, I'm pretty sure he's a Real Man pretending to be a 16 year old.

Creepier yet, maybe.

Expat, anything over about 15KHz at ordinary listening levels is of only theoretical interest. If you prefer a particular tweeter, it's highly unlikely that it has anything to do with extended frequency response.

I've seen ads for devices that repel vermin and insects ... and it was the same exact Radio Shack Super Tweeters I used to own!

Here it is... on top of my glorious old speakers! Anyone else have one of dem dare Super Tweeters?



And, BTW...I pooh-pooh all of your talk regarding magnetic grills. VELCRO is where it's at, baby!

The tweeter(in the cabinet) looks like a small midrange woofer.

I think the driver sizes were 12", 5" and 3". It never had any highs, which was why I doubled up with the supertweeter.

Plus, it kept pests away so I didn't need a pellet gun.

I might have to dig out my old speakers in the basement and have a look at the tweeters. I think they were similar...kind of oversized looking cones.

The theory for super-tweeters goes: Live instruments can produce ultra-sonic harmonics. Even if you can't hear those harmonics they are still creating sound pressure.

I know, from holding a pest repellent close to my ear, that those sound pressures do press on ear drum, painfully. So they may present some sensation. Just as infra-sonic bass can be felt, even if it can't be heard.

That said, where is this ultra-sonic content coming from? Mics in most cases don't pick it up. In an effort to prevent aliasing in the duplication master mix, brick-wall filters are used to remove anything that does make it through. Then, how many receivers/amps will pass those frequencies. I'd like to see an analysis done of the relatively few 96 and 192 kHz releases out there, how many have actual harmonic content above 20 kHz, and not just noise.

As John said, if you like the sound of one tweeter more than another, it's not because it can reproduce ultra-sonics. Although, perhaps in designing it to handle those upper frequencies a better tweeter was produced.