Axiom Home Page Forums General Discussion Technical Questions Tweeter differences

Axiom v4 has a horn. I can attest Andrew did a great job on that one given all the constraints. Not nearly as masculine as the old Klipsch compression chamber, throat and mouth though.

Oh cool. The “wave guide “ thing on the front baffle makes it a horn? Or the overall design makes it a horn? I guess I envisioned a horn as well, what a stereotypical horn would look like.

Need to hear some v4 horns soon. !

I don't think any current Axiom speaker uses a horn tweeter. They did make some Meraks with a horn tweeter.

As the first post by Ian says, it is indeed a horn. A shallow one at that. I don't know the technical name for that geometry.

A horn is a type of waveguide. I suppose this may be the case of a horny waveguide.

https://www.axiomaudio.com/boards/ubbthreads.php/topics/400862/1/New_Tweeter

Just following up here. I've had my brothers HK integrated here and have done a fair bit of listening to it. It's super interesting that it actually sounds quite a bit different than my Yamaha. It's got a fair bit more heft in the bass, but not muddy. It's just got more oomph. I've been missing that and it brings more of that emotional impact i've talked about missing. I've done all listening with the tone defeat on. Of course im going from audio memory to my Yamaha but I think it's fair to say I know how that receiver sounds. The midrange isn't as forward and realistic as my Yamaha, which I now now i really like as I miss that aspect of the sound, the HK has a nice midrange but it's not as " in the room " as the Yamaha. As for the high frequencies, ( which was the main point of doing the trade to figure out his tweeter breakup ) it sounds good to me on my M60's. Again, it's not as smooth or " real " as the Yamaha but it's still really good, no breakup at reasonable to loud SPL. It does eventually breakup but i think im pushing the amplifier too hard in my large space, im sitting anywhere from 12-18 feet back. ( It's really easy to move the couch back and fortha s we we don't have much furniture in the new large space here yet.)

One possiblity for his tweeter breakup could actualy be his room. He reports the same kind of breakup / messy high freq using my Yamaha. ( He also reports that the Yamaha sounds less " full " than the HK to him.) His room is quite narrow and long and the speakers are quite close together. I don't have the technical verbage to articulate what is maybe going on, but it's possible that having the speakers so close together and in long space with 9 foot ceiling is creating a complex web of reflections. There is also alot of glass along one wall. I'm betting its his room. At lower SPL things sound pretty nice to him. I told him to somehow try puitting the speakers along the long wall, but theres noway that they could stay there as it's not practical at all. I guess the other test is to bring the m60's to my place or to another room andtry them out before spending money on new tweeters or amplification. I think he would do well with some m2's and 2 ep125. I bet he could integrate those into his room better. Drive the m2 with the HK and seperate the bass into the subs. But that still doesn't help the room...

Maybe the mids are less forward because the bass is more prominent.

When a speaker's high frequency response is flat or exaggerated, a reflective room will make the speaker sound thinner. If you look at the active LFR response, it declines in a textbook fashion and it sounds spectacular in a room. The old tweeters and family of curves don't help either.

Yeah mids could be less forward due to bass. I also feel like my Yamaha, when using the Pure Direct , has a really great image left to right whereas the HK is not near as precise. Could be the bass again affecting that, but I feel like it’s more than that.

It's possible the HK suffers from more cross-talk between the channels. This reduces imaging precision but may appear to make images larger and the soundstage wider.

Yup. That’s exactly it. The Yamaha can achieve the holographic Center image between speakers but rarely goes outside the left or right boundary’s and requires my head in perfect axis alignment. The HK plays a wider wall just outside the left right edges albeit a lot less clear and not well placed. Height remains the same but I think that’s the woofer/ speaker dispersion and not the electronics.

Which type of imaging do you prefer? HK or Yammie?