boom

[lunchmoney]

Also posted this in the build thread, sorry for new thread, but I had to highlight this moment.

I'm sure PE won't mind

These big RS drivers are GORGEOUS.

Build thread here:

http://techtalk.parts-express.com/sh...d.php?t=229226

[fastbike1]

They are that, indeed. BTW, you do excellent work.

Also posted this in the build thread, sorry for new thread, but I had to highlight this moment.

I'm sure PE won't mind

These big RS drivers are GORGEOUS.

Build thread here:

http://techtalk.parts-express.com/sh...d.php?t=229226

[Dirk]

I know there's no auditory benefit, but to me, it looks like a countersink would have been nice.

Hard to nitpick the engineering, but there ya go. ;-)

[ErinH]

I know there's no auditory benefit, but to me, it looks like a countersink would have been nice.

Hard to nitpick the engineering, but there ya go. ;-)

I thought the exact same.

Maybe no measurable difference but it might help paychoacoustics. I'm half serious.

[lunchmoney]

I know there's no auditory benefit, but to me, it looks like a countersink would have been nice.

Hard to nitpick the engineering, but there ya go. ;-)

Thought about it, decided not to.

Really wanted to maintain the "lightweight, thin walls, heavily engineered" theme here, dying to hear how it sounds without having to make thick heavy baffles... a bit if a purist approach I guess.

[cjd]

Man, that's such a tiny box for that driver though! It really loves being given room to breathe. A countersink is simply attention to detail. Same with using a nice roundover on brace cutouts. As long as there is good room to breathe on the back-side it won't matter here functionally, though. Nor will that lovely large roundover on the baffle.

Hopefully it's sealed - I haven't paid enough attention to the other thread to remember, but if it's ported it's a *really* small box for that driver.

Box looks great, regardless.

Love the driver also. A pair sure is nice though...

[lunchmoney]

Man, that's such a tiny box for that driver though! It really loves being given room to breathe. A countersink is simply attention to detail. Same with using a nice roundover on brace cutouts. As long as there is good room to breathe on the back-side it won't matter here functionally, though. Nor will that lovely large roundover on the baffle.

Hopefully it's sealed - I haven't paid enough attention to the other thread to remember, but if it's ported it's a *really* small box for that driver.

Box looks great, regardless.

Love the driver also. A pair sure is nice though...

These are the bass cabinets for 3-ways, so yes there are two of them.

1.5 cu ft sealed, to be high passed at 60 hz, a big sub handles below that.

[lunchmoney]

A countersink is simply attention to detail.

Flush mounting would have required making the baffle thicker, which I really didn't want to do. I'm cool with surface mounting it. Don't think it looks bad at all. Will make veneering much easier.

[cjd]

These are the bass cabinets for 3-ways, so yes there are two of them.

1.5 cu ft sealed, to be high passed at 60 hz, a big sub handles below that.

Yup. Small... I think I run about 6 cubic feet for a pair. Sealed. And I meant a pair in EACH cabinet. :P

Agree and understand on the countersink, though I personally am not sure about the visuals, I'm sure it'll come together nicely.

C

[lunchmoney]

Yup. Small... I think I run about 6 cubic feet for a pair. Sealed. And I meant a pair in EACH cabinet. :P

Agree and understand on the countersink, though I personally am not sure about the visuals, I'm sure it'll come together nicely.

C

Drivers can be used in different ways depending on your objectives.

The small volume was very deliberate, not a mistake (which you seem to be implying).

It's been carefully simmed by both Mike Z and Curt Campbell... I forget the exact f3/f10 off the top of my head, but trust me it will perform beautfully when crossed with a decent-sized sub at 60 hz.

Next time I'll flush mount so everyone doesn't get so cranky

[Pallas]

***trust me it will perform beautfully when crossed with a decent-sized sub at 60 hz.

That sounds like a good balance between extension, size, and efficiency to me.

However, when you get 'em set up you should also try overlapping the mains and subs. (Run mains full range, and fold the subs into them.) You will probably find that your in-room response is smoother that way. And you're using subs that are pretty clean on top, so running the mains full-range and bringing the subs in at maybe 120Hz or so will not only improve response smoothness, but also increase your headroom in the upper bass.

[lunchmoney]

That sounds like a good balance between extension, size, and efficiency to me.

However, when you get 'em set up you should also try overlapping the mains and subs. (Run mains full range, and fold the subs into them.) You will probably find that your in-room response is smoother that way. And you're using subs that are pretty clean on top, so running the mains full-range and bringing the subs in at maybe 120Hz or so will not only improve response smoothness, but also increase your headroom in the upper bass.

Thanks

Yeah, absolutely I will be trying the mains run full range, trying different crrossover points, etc.

I also have the DEQ2496 up and running specifically for the mains... this is a very long term setup here, gonna take my time and really dial it in.

The really scary thing is that PE is sending me not just the repaired RSS315 (looses dust cap), but also an additional RSS315 just for my troubles

So now the question is what to do with the subs... I think I'll start with just one in a vented cabinet about 2.5-3 cu ft... then maybe build a second one just like it... OR I could make a single 5 cu ft vented beast with two drivers... but that's unlikely.

[cjd]

Drivers can be used in different ways depending on your objectives.

The small volume was very deliberate, not a mistake (which you seem to be implying).

It's been carefully simmed by both Mike Z and Curt Campbell... I forget the exact f3/f10 off the top of my head, but trust me it will perform beautfully when crossed with a decent-sized sub at 60 hz.

Next time I'll flush mount so everyone doesn't get so cranky

no no, i'm just giving you grief. Seriously. NO worries. Enjoy.

[Trap]

lunch....I finally got both of the clearance RS270S-8's I purchased last year installed in cabinets; i presently don't have the time to build, so I purchased PE 2.5 ft3 sub cabinets and installed a front baffle and sealed the amp cutout; stuffed about 3 pounds of polyester in each cabinet; WT3 measured Qbox of .52; not exactly my dream bass bins but will have to do for now.
I'm sure you're going to be satisfied with your results.

[Pallas]

So now the question is what to do with the subs... I think I'll start with just one in a vented cabinet about 2.5-3 cu ft...
then maybe build a second one just like it...

That sounds like a good idea, if you can fit them in the room. Also, vented boxes will be efficient enough to use with your SA240 plates. I know you ultimately had a driver issue, but I still say the SA240 isn't enough power for a smallish closed box.)

Another idea would be to make one vented, and one much smaller and sealed. Put the smaller one above the room centerline, if you can.

OR I could make a single 5 cu ft vented beast with two drivers... but that's unlikely.

And a bad idea, because you lose so much placement flexibility.

[lunchmoney]

no no, i'm just giving you grief. Seriously. NO worries. Enjoy.

Oh ok... I thought you meant I had screwed up by not having larger cabinets.

[lunchmoney]

That sounds like a good idea, if you can fit them in the room. Also, vented boxes will be efficient enough to use with your SA240 plates. I know you ultimately had a driver issue, but I still say the SA240 isn't enough power for a smallish closed box.)

Another idea would be to make one vented, and one much smaller and sealed. Put the smaller one above the room centerline, if you can.



And a bad idea, because you lose so much placement flexibility.

Pretty sure I'm going to start with one vented sub (just one driver), and modify the SA240B to remove the boost.

Then maybe build another one just like it some day, OR just use the sealed 1.8 cu ft cabinet I already have (which of course would require an additional SA240B)

But the single vented one might be enough... I dunno

Agreed a single sub with 2 drivers isn't a great idea, no flexibility of placement

[cjd]

Oh ok... I thought you meant I had screwed up by not having larger cabinets.

Oh, totally. Hugely. It's just going to sound like you have a pop-singer with a bowl-cut hairdo in the room when you're done, but hey... some people like that. And you NEED huge boxes. I mean, I just don't know how you can live with yourself if you can even walk around the room with speakers in it.



There are differences that, if you were to put systems side-by-side and agonize over them, that you could probably hear in a smaller vs larger box. And I have an unproven theory that the occasional individual complaining of chuffing at the phase plug/vc gap is running a small box - how small, I have no idea. I've pushed mine well past XMax with no noise, and just clean sound. Well, ok - it gets a bit lost at that point but it sure makes for grins.

C

[lunchmoney]

Oh, totally. Hugely. It's just going to sound like you have a pop-singer with a bowl-cut hairdo in the room when you're done, but hey... some people like that. And you NEED huge boxes. I mean, I just don't know how you can live with yourself if you can even walk around the room with speakers in it.



There are differences that, if you were to put systems side-by-side and agonize over them, that you could probably hear in a smaller vs larger box. And I have an unproven theory that the occasional individual complaining of chuffing at the phase plug/vc gap is running a small box - how small, I have no idea. I've pushed mine well past XMax with no noise, and just clean sound. Well, ok - it gets a bit lost at that point but it sure makes for grins.

C

That is an interesting point... I wonder if the phase plug will chuff...

[lunchmoney]

Oh, totally. Hugely. It's just going to sound like you have a pop-singer with a bowl-cut hairdo in the room when you're done

not a clue what this means

still sounds like u think I screwed up, I genuinely want to know why

speak plainly