Show Us Your Speakers!

[montesquieu]

Oh, made those myself - based on an AMT device.

Really cool looking. Got any more info?

[walpurgis]

Really cool looking. Got any more info?

Looks a bit like a Dayton Audio or David Louis product (similar). Air Motion Transformers (AMT) were a pleated ribbon driver developed by Heil in America rather a long time ago. The sound quality is quite striking.

Here are a pair of the larger units on Heil's own speakers.

[freefallrob]

Epos Epic 5

[YNWaN]

It’s a Dayton Audio unit. I’ll post some pics of them tomorrow if you like.

[walpurgis]

It’s a Dayton Audio unit. I’ll post some pics of them tomorrow if you like.

Ideal as a super tweeter. If I recall response is near flat to 40kHz. What filter are you using Mark? My guess is that a cap around 0.2uFd should function about right.

[montesquieu]

It’s a Dayton Audio unit. I’ll post some pics of them tomorrow if you like.

yes please.

[YNWaN]

Sorry the picture is a bit dark:



They are built around a couple of small Dayton AMT units. As mentioned above, they are surprisingly flat out to 40K and, as luck would have it, both the sensitivity and impedance are in line with my requirements so very well matched. The little stands are mad from a mixture of Corina and acrylic. It looks like they use a 1st order crossover but it’s a touch more complicated than that as they are actually in series with the tweeter crossover. They are set to point slightly off axis and down at the listener. I made a laser alignment tool to help set them up .

[walpurgis]

Hmm. I assume Mark, that you are saying the Daytons are fed directly from the same filter section that the Yamaha tweeters are on?

If so, then the Daytons will be outputting across the same treble range, at least until the Yamaha tweeter rolls off, probably in the upper twenties of KHz. This also lowers the HF impedance to a nominal 4 ohms and that would alter the treble curve, giving the whole top end an inaccurate response.

If it was me, I'd definitely run the Daytons on their own parallel filter. A single cap in series with the supertweeter should do the job, providing a 6db/oct introduction at whatever chosen frequency. I'd aim at above 18kHz. This can be fed from the rear speaker terminals without needing to access the crossover. Output from the Dayton should not be significantly audible. If it is, then the filter is coming in too low.

[Ian7633]

These are my brother's lovely Harbeth mk1 HL P3 's. I've got them at the moment because there was a distortion issue with one of them which is now hopefully sorted. I'm using them on my PC streaming system currently and as near field monitors the sound is very accurate and smooth. I'll put them on my main system later, I'm used to the big three way Signifiers so it will be interesting to hear how they sound.

Sent from my SM-G920F using Tapatalk

[struth]

Sorry the picture is a bit dark:



They are built around a couple of small Dayton AMT units. As mentioned above, they are surprisingly flat out to 40K and, as luck would have it, both the sensitivity and impedance are in line with my requirements so very well matched. The little stands are mad from a mixture of Corina and acrylic. It looks like they use a 1st order crossover but it’s a touch more complicated than that as they are actually in series with the tweeter crossover. They are set to point slightly off axis and down at the listener. I made a laser alignment tool to help set them up .

Nicely made Mark. I like those