Re: My RS180 MTM Design
Mike. What diameter and length port did you use? Firing Down? Rear? Forward? From what I understand, these are incredible sounding speakers for the price. They will be in equal HT and music duties. I just really wanted to build soemthing that would satisfy me for a while to come without the itch to upgrade in the near future. Any advice would be appreciated. Thanks
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My RS180 MTM Design
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Re: My RS180 MTM Design
Yes Jeff. It seems like there have been several versions of this MTM in a larger bass extended tower design. Thanks for the response, your crossover looks like a relief compared to the other versions I've seen. I'm still a newbie, in the process of getting my feet wet with the vented Tri Trix design for my father. I wanted to build some towers that would sound excellent and that I would be happy with for some time to come....your design seems to fit that bill pretty well. I have a Dayton Titanic sub that I built, so I wanted my my mains to play with some authority down to at least 60HZ where I would cross them over. Thanks again.
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Re: My RS180 MTM Design
I built mine in larger enclosures , I believe around 1.6 cubic feet , kept the baffle width and driver layout the same , and they sound incredible.
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Re: My RS180 MTM Design
Originally posted by coniacvsop View PostI'm not sure how much action this thread is still getting but I was wondering if this crossover would be kosher to use with the extended bass towers documented in other threads? I was looking at building the 1.7cu ft Nat P's, but stumbled across Jeff's new design. Any help would be appreciated. Thanks
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Re: My RS180 MTM Design
I'm not sure how much action this thread is still getting but I was wondering if this crossover would be kosher to use with the extended bass towers documented in other threads? I was looking at building the 1.7cu ft Nat P's, but stumbled across Jeff's new design. Any help would be appreciated. Thanks
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Re: My RS180 MTM Design
Originally posted by Jeff B. View PostThat's what I thought too based on the published curves. However, someone who measured both under the same conditions appearred to contradict this by showing them to be very close in response. Did you measure them yourself and establish that they would not interchange? I would have, but I didn't think to do it when I had both here at the same time.
Jeff
C
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Re: My RS180 MTM Design
Originally posted by cjd View PostBack when I worked up designs for the RS28A and RS28AS versions, I found that they were not interchangeable. YMMV.
C
Jeff
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Re: My RS180 MTM Design
sorry i am late to the party, but is there a kit for this?
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Re: My RS180 MTM Design
Originally posted by billschulte View PostI am skipping the bi-amp stuff above...Jeff would this passive crossover work for a single RS-180-4?
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Re: My RS180 MTM Design
Originally posted by billschulte View Postas an uninformed observer of this site, I have been following this section closely. I would like to do a bi-amp of a single Dayton RS180(8 or 4) and found Jeff Bagby's Denhams response shaping network. Does anyone have a network like this worked up for a single RS 180?
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Re: My RS180 MTM Design
Originally posted by Jeff B. View PostAs I pointed out in other posts in this thread - my design was with the RS28AS. I have never built it, or adjusted it for any other tweeters, so you're not picking apart my design. Substituting tweeters is completely up to the end user. A lot of that gets discussed here too. Adustments are easy to make though, and shouldn't be a problem for anyone wanting to go down that road.
Chris
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Re: My RS180 MTM Design
Originally posted by czag View PostThat is what John's test showed also, this model was made from a newer unit with 91db sensitivity for the RS28A. These differences could very well be attributed to Dayton's unit to unit variability. There was about 1.5db difference in sensitivity between the batch of 5 RS28F that John tested for me. I used the one with about 91.5 sensitivity for the RS28F since that seemed to be about the average for the 5 units I have.
When I modeled it the extra top end rise seemed to come from the xover being applied.
I do not want to come off as if I am picking you design apart, it is by all accounts a great design. I just wanted to point out that these 2 tweeters may not be drop in replacements in every design due to the differences in top end and unit to unit consistency. This was just something I noticed when working on my own project with a similar tweeter xover topology , but with different woofers.
Chris
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Re: My RS180 MTM Design
Originally posted by Jeff B. View PostThe current RS28a's are almost 2dB more sensitive than early versions. Plots I have seen of current tweeters (A and F versions) overlay each other almost perfectly except for the response above 15kHz. By the way, I don't get quite that much rise at the top of my RS28F.
When I modeled it the extra top end rise seemed to come from the xover being applied.
I do not want to come off as if I am picking you design apart, it is by all accounts a great design. I just wanted to point out that these 2 tweeters may not be drop in replacements in every design due to the differences in top end and unit to unit consistency. This was just something I noticed when working on my own project with a similar tweeter xover topology , but with different woofers.
Chris
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