Sorry, wasn't meant as criticism at all ..... was just trying to feedback what I found when trying out the sim, as I have had my eye on this AMT myself ....
Would be good to hear how or if it sounds different from the Mundorf ... as you say it's a lot cheaper ..
Would be good to hear how or if it sounds different from the Mundorf ... as you say it's a lot cheaper ..
The tweeter of the mentioned KLANG+TON project (Strassacker: Speaker Building, Components) actually is the Audiopur AMT 13M, but it appears to be identical to the Dayton AMT 3-4. Interestingly enough, there are distortion plots at two different levels in the datasheet provided by Strassacker: http://www.lautsprechershop.de/pdf/audiopur/audiopur_amt13m_datenblatt.pdf
Regarding the crossover of the SAR 1 I'm not fully convinced. I think the tweeter filter with that peak at 1.4 kHz in the transfer function pushes the AMT very hard and needs some rework.
Regarding the crossover of the SAR 1 I'm not fully convinced. I think the tweeter filter with that peak at 1.4 kHz in the transfer function pushes the AMT very hard and needs some rework.
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Yes, I see that now. I have a new version which fixes this by upping the crossover frequency to 3kHz. When I have solved the phase response matching I'll re-post.
Thanks!
Erik
Here is the updated SAR-1. It fixes the issue of not having enough rolloff in the tweeter and also adds a little EQ to boost the very last half octave.
Wow I hadn't seen this design..
from what I've read from people who've used this driver( and I've read a lot over the past week), it has great midrange clarity, plus it can be crossed pretty high for a 7"
from what I've read from people who've used this driver( and I've read a lot over the past week), it has great midrange clarity, plus it can be crossed pretty high for a 7"
You can as in here crossed at what looks like 3.7Khz but this is a mistake. The driver itself does nto have any issues and can be used as high as you want, but the above`s crossover will have very poor off-axis performance, a Klingon Bird of Prey pattern. Although I use the same woofer in my speakers crossed at 2.5Khz, I only do it because of limitations of the tweeter I have paired it with. Anything above 2Khz for a 7" is a compromise. Above`s crossover also has the tweeter level reduced by what seems to be 3-4db which is a lot. Troels Gravesen does use reduced tweeter level in his design, but by less - usually 2db or so. I have tried this on several projects with different tweeters (XT25TG30, XT25BG60, SB26STCN, DT300) and none was able to reproduce properly accordeon and trumpets. Especially the darker soubding Vifa tweeters. Best (my own opinion of course) is to allow for a small dip in the 2-5Khz region, of about 1db or so and then have rising response with level above 15Khz being 1-2db higher than the midwoofer.
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