Dayton RSS315HF-4 or 390HF-4?

[GO-NAD!]

Welcome back! I hope you had a wonderful time there!

It was great! I'm a bit sunburned, but otherwise we enjoyed ourselves thoroughly!

 

[GO-NAD!]

This thread has been a lot of fun to read. I was on the fence between two Titanic 12's and two CSS trio 12's for a small sealed application and ended up getting the Titanics because they modeled a little better in my max allowable box size. Now I am considering moving the subs and rebuilding the boxes ported and while the Titanic's will offer great performance, I kinda wish I had the Trio 12's to play with.

Certainly keep us posted if/when you pull the trigger.

I will do so. It'll be a relatively simple build, as I will just be slapping on some flat black paint for a finish. No point in making them pretty if they're going behind the false wall.

 

[GO-NAD!]

Well, here I am a year-and-a-half later and I still haven't started this project. I haven't forgotten or ignored it, I've just been busy with other stuff.

Thought about going with sonosubs for a while, but I'm leaning towards simple ported/plate amp. What's the consensus on the Titanics, as compared to the RSS-HF series? Any opinions?

 

[GO-NAD!]

Well, no response to my last question.

But, never mind that. I've come up with another possible plan now. Planning to take a drive down to Maine in November. So, I could save myself a bundle by have items shipped from Parts Express to Calais for free and there would be no tax added when I come back through customs.

This what I'm thinking: 2 x RSS315HF-4 sonosubs. Could somebody model this up for me? I don't trust my own modelling. I would go with either a 16" or 18" sonotube.

Just not sure about amplification. I could go with Crown XLS1000 or XLS1500, or NU1000DSP or NU3000DSP.

XLS: Very quiet fan, plug n' play. No HPF though. I'm not going to run these thing wide-open, by any stretch. Would a HPF be really necessary?

NU: Built in EQ and HPF (20HZ, lowest setting). However, I would need speakon connectors, XLR adaptors and a fan mod.

Thoughts?

 

[GO-NAD!]

Nobody?

 

[jinjuku]

Wow. Looks like you are talking to yourself there NAD. I would post this at PETT (Parts Express Tech Talk). Lots of experience there with these drivers.

Me personally? I wouldn't do either. I would do the dual opposed Infinity Reference 126X series.

 

[annunaki]

You can do the Dayton's in a Sonotube but the enclosure volume requirements I mentioned earlier still stand. You are going to need probably a 16" Sonotube around 60" tall for a Dayton to achieve your goals. I would still recommend bracing the tube and venting it becomes a bit more challenging considering the layout. BUT it can be done

As for the titanic vs RSS, the titanic has a slightly higher performance envelope, but it does not model quite as smoothly.

The CSS I mentioned earlier in this Thread is still a viable candidate for this design as well.

 

[GO-NAD!]

You can do the Dayton's in a Sonotube but the enclosure volume requirements I mentioned earlier still stand. You are going to need probably a 16" Sonotube around 60" tall for a Dayton to achieve your goals. I would still recommend bracing the tube and venting it becomes a bit more challenging considering the layout. BUT it can be done

As for the titanic vs RSS, the titanic has a slightly higher performance envelope, but it does not model quite as smoothly.

The CSS I mentioned earlier in this Thread is still a viable candidate for this design as well.

Yeah, I understand that it would be on the tall side. But, that's the advantage of sonotube - low weight.

I checked WinISD and what I got was 5.7 ft^3 for a 20.5Hz tune. A 6" round vent would be 26.75" long. An enclosure diameter of 16" would give me a height of 50". That's before adding bracing and driver volumes, and feet. So yes, in the neighbourhood of 5ft tall.

I could shorten it a bit, by going with an 18" sonotube, I suppose.

I'm a little bit leery of the Trio 12 now, because it's at the end of its production life and if I should have a problem, I might not be able to get a replacement. My concerns may be unfounded though. IIRC, the volume requirements for the Trio12 aren't far off the RSS315. I could be wrong on that though...

Regardless of the driver I choose, what do you think of the power and HPF requirements?

Oh, and thanks for responding.

 

[GO-NAD!]

Well, looks like the Trio 12 won't be an option - they're all gone. However, the SDX12 will be available soon.

Specs, as posted at HTS:

Target/preliminary parameters are as follows:

Re = 3.7959 ohms
Fs = 18.0666 Hz
Zmax = 43.7661 ohms
Qes = 0.3576
Qms = 3.7655
Qts = 0.3266
Le = 1.7983 mH (at 1 kHz)
Diam = 246.3800 mm ( 9.7000 in )
Sd =47676.1088 mm^2( 73.8981 in^2)
Vas = 93.1960 L ( 3.2912 ft^3)
BL = 17.9996 N/A
Mms = 268.8795 g
Cms = 288.6230 uM/N
Xmax = 28mm one way
Xmech = 30mm one way
Efficiency = 0.1444 %
Sensitivity= 83.6137 dB @1W/1m
Sensitivity= 86.8515 dB @2.83Vrms/1m

Tentative price is in the $300 range and we are contemplating an introductory promo.

$300 is on the steep side, but an introductory promotion might bring it into striking range.

Any opinions?