Flat Pack Build, 18" dual opposing Dayton RSS460HO. - AVS Forum
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Old 04-30-2014, 10:38 AM - Thread Starter
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I had bought a dual opposing flat pack from Erich's site, and had been (slowly) working on it. biggrin.gif

Recently I got my six-prong 1/4" t-nuts installed on both ends, and am working on getting it prepped for primer. Only thing I haven't done so far is figure out what paint I want to use. I'm thinking at least flat black, spray paint.

I recently got in 1" Sonic Barrier padding to put inside the cabinet, haven't yet done so. Though I'm not sure if I want to use my bi-amp binding post terminals or my Speakon connectors. Not quite a decision I had made up my mind for yet. The latter option seems to be a bit of a pain in the butt to do, considering I'm working with 8 gauge wire here. biggrin.gif

If anything, I DID at least get the amp side of the main speaker wire done with one. These speakon connectors I got support 10 gauge wire, which is what I stripped the 8 gauge down to. The pain in the butt part, is this was the first time I soldered any speakon connectors, so it was a learning experience for me. lol





I'm just not sure if I really want to have the connector on the back baffle or back side of the cabinet. At least the binding post I can let it be on the bottom center of the cabinet, hidden. (I wouldn't use banana plugs on it, I'd just hook straight wire.) However I like the idea of speakon connectors actually 'locking'. Anyone have any thoughts on the matter? smile.gif


Also, here are some pictures of some of the progress, I didn't capture every moment. Our cat liked it though!



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Old 05-04-2014, 05:00 PM - Thread Starter
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As an update, I went ahead and decided to use Duratex on this cabinet. I had placed an order for it and the textured rollers on Friday. biggrin.gif

Plus, I'm thinking of building another dual opposing cabinet. Doing some reading, and I read that using the same exact subwoofer, such as stacking them, ought to yield a 6dB increase. Doubling of subwoofer and power available. Which should be a big upgrade to having a single Dayton RS460HO in a 4cubic foot sealed enclosure.

Also with those plans, I'm considering getting a Peavey IPR2 5000 amplifier to use for them instead of my Crest CC4000. Which would give 2,525 watts per cabinet rather than 2,000, going by specs and wiring configuration options. Then more importantly, the Peavey's power consumption would be little less than half of the Crest. Which is very important since I can only operate off my single 20amp circuit. If I'm doing my math right, at 1/8th power draw on the Peavey for 2ohm loads per channel, is about 7 amps (890 watts), while calculating the amp draw from my Crest, would be about 15 amps (1,825 watts).
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Old 05-10-2014, 10:03 PM - Thread Starter
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Picture of the first coat of Duratex applied.



After I took this, I went onto coat two on the sides this morning, then I got the baffles in their second coats this evening.

Getting closer to being ready for use! biggrin.gif
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Old 05-11-2014, 10:17 PM - Thread Starter
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And done! Got 1" Sonic Barrier padding inside the cabinet, and got the drivers installed and all in place. I'm very impressed, and I haven't even upped the amplification for it yet. biggrin.gif

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Old 05-11-2014, 10:42 PM
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Nice job!
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Old 05-13-2014, 10:31 AM
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Hi,

Looking good. Quick question... can you please confirm what is the internal NET volume of the box. I build a DO box for my RSS460-18 and would be interested in comparing. Mine landed up at 230L in the end.
I then used quite a bit of acoustic stuffing. In hindsight probably a bit too big but it works and sound good connected up to both channels of my iNuke 6k DSP.
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Old 05-13-2014, 12:06 PM - Thread Starter
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Quote:
Originally Posted by Nuno C View Post

Hi,

Looking good. Quick question... can you please confirm what is the internal NET volume of the box. I build a DO box for my RSS460-18 and would be interested in comparing. Mine landed up at 230L in the end.
I then used quite a bit of acoustic stuffing. In hindsight probably a bit too big but it works and sound good connected up to both channels of my iNuke 6k DSP.

Well, according to the information on this page, the internal net volume is 8 cubic feet, and that's with out the drivers and acoustic stuffing. I'm not sure how to calculate the difference the drivers and padding make for it.
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Nice job!

Thanks! biggrin.gif
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Old 10-24-2014, 08:48 PM - Thread Starter
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Okay, so upon working on tuning my system more, I discovered a phase issue I can't seem to figure how to resolve fully in my system.

My Cerwin-Vega S-2 EE speakers are currently configured to play down to 50Hz, I had them at 40Hz (Though I could go much lower as they are well capable, I just wanted to ease the load on them.). Setting all done through my DCX2496. Same unit supplies my LFE signal to my subwoofer setup. I haven't added the second dual opposed enclosure yet, but when I do it will be on top of the other one. (Not much placement options)

I've read around and saw that sealed enclosures are 180 degrees different than ported, and my Cerwin-Vega's have a wide slot port on the back. I had the phase on the DCX2496 set at 90 degrees because of previous testing, but as I found this information out I tried again today. So I tried 180...

50Hz test tone did improve, but 70hz was hurt quite a bit, more than I gained in the 50hz range... in fact, 70hz is strongest at 0 degree setting. I was using my DEQ2496 with my Dayton audio mic to read the SPL from my listening position, and with what tinkering I've done, the timings don't seem to help any. Unless I'm just not understanding those correctly. (I'm still learning. )

So far I have it set at 135 degrees to try to balance between 90 and 180 degrees, because if I go below 90 (such as 0), I will have the 50hz range canceled out with the mains. Any ideas what I can do?

*Edit*
I should note... 70Hz isn't canceled out, in fact if I mute the subwoofer the SPL lowers. So it still gains but it could gain more if I could achieve perfect phasing.

Last edited by Hoodcom; 10-24-2014 at 09:06 PM.
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Old 11-21-2014, 07:52 PM - Thread Starter
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Okay, I attached a picture of the sub setup and a measurement I took with the Dayton UMM-6 USB mic in R.E.W.

I believe I have the phasing well in control thanks to the DCX2496, but I notice, regardless of setting, the quad Dayton setup seems to roll off quite a bit above 65Hz. I've even set them to operate off the right channel with the right Cerwin-Vega muted and I get the same result. Is this a natural roll off of the subwoofers? Phasing doesn't seem to be the issue at all, in fact the LCR picks up where the Daytons slack off at.

I'd play around with placement options but at the moment that's almost impossible to do in my room, at least unless I move the electronics and just make a TV stand out of something else.

Though any thoughts about the response itself? Possible room for improvement via EQing? Oh yeah, I forgot to mention, this was measured with a 3.5dB increae at 28Hz at Q setting at 2.0. I forgot to disable that setting on my DCX2496. Other than that, only phasing settings are applied.
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Last edited by Hoodcom; 11-21-2014 at 07:55 PM. Reason: Corrected a typo.
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