RSS315HF-4 as the anchor of a 3-way???

[Pete Schumacher]

Re: RSS315HF-4 as the anchor of a 3-way???

Perfectly reasonable. The biggest issue is whether one wants the subwoofer in the same location as the "mains" . . . because of the different relations to room acoustics the best (or the predetermined) location for the mains is not always best for the sub(s). It's a generic "all-in-one" problem. Of course if the location works for both it's not an issue, but . . .

A RS180 would work just as well as the Usher over that range, and it's a natural application for active crossover (you should try that right hand side of the PCD spreadsheet sometime ;)), but that would make a different loudspeaker . . .

I was inspired to do this by building and listening to Jeff B's Dreydel. He sent me an option that uses the RS28 instead of the 27TDFC, and my thoughts naturally drifted to adding a substantial low end to it. I heard the Marcatos by Paul K in Iowa, and they were simply wow. That's the only reason I modeled with the Ushers first. While the woofer and tweeter are set, the mid isn't.

The RS180 might work, and the RS150 as well, but they'd most likely have to be the 4 Ohm version to reach the required sensitivity. The XO target above was achieved with only .8 Ohms of padding on the RS28 and none on the Usher. The RS180 is a couple dB less sensitive than the Usher. But, the RS180-4 will likely work, with just a touch of padding. Active is not an option on this build. I want this to be a traditional full range 3-way that can be driven with a 250W stereo amp and laugh. I modeled room effects for placement in my particular living room, and while peaks and nulls will be present, the fact that there are two distinct stereo sources for bass to below 20Hz should help smooth out room effects.

And active set up will happen one day . . . ;)

[philiparcario]

Re: RSS315HF-4 as the anchor of a 3-way???

pete mentioned it would be two boxes.

I have these as mtm/woofer 3 ways they use active crossovers. the mtm uses pe's bi amp plate the woofer uses a reckhorn crossover.

drivers are
1 focal TLR tweeter
2 focal 7w4411 midwoofers
nht1259 subwoofer

crossover points are 120hz

3000hz

these cost more but I have a feeling pete's will sound as good.

[gordoncalder]

Re: RSS315HF-4 as the anchor of a 3-way???

[QUOTE=Pete Schumacher ®;1619434]Well, I've been contemplating a 3-way with the RSS315 for a while now. I modeled up what I'd consider a fairly beefy setup. 3 cubic feet tuned to 16.5Hz using a 15" PR from AE Speakers. Baffle diffraction simulations were generated with Jeff B's tools and BDS, traces taken from Zaph and PE for the mid, tweet, and woofer respectively.

200 and 1400Hz on the XO points.

It might be here sooner than I thought!!!


Cool! I'll be following this one with interest. I have two of those subs waiting in the wings for a similar purpose (but will be sealed, and with different mids and tweeters). Were there other mid options you considered? I'm always interested in people's decision making processes in speaker design. Is it a single cabinet design or are the subs in a separate enclosure? That thing is going to be heavy!

Gordon

[Deward Hastings]

Re: RSS315HF-4 as the anchor of a 3-way???

Perfectly reasonable. The biggest issue is whether one wants the subwoofer in the same location as the "mains" . . . because of the different relations to room acoustics the best (or the predetermined) location for the mains is not always best for the sub(s). It's a generic "all-in-one" problem. Of course if the location works for both it's not an issue, but . . .

A RS180 would work just as well as the Usher over that range, and it's a natural application for active crossover (you should try that right hand side of the PCD spreadsheet sometime ;)), but that would make a different loudspeaker . . .

[Pete Schumacher]

Well, I've been contemplating a 3-way with the RSS315 for a while now. I modeled up what I'd consider a fairly beefy setup. 3 cubic feet tuned to 16.5Hz using a 15" PR from AE Speakers. Baffle diffraction simulations were generated with Jeff B's tools and BDS, traces taken from Zaph and PE for the mid, tweet, and woofer respectively.

200 and 1400Hz on the XO points.

It might be here sooner than I thought!!!