Air Chamber question

[kr15 5,000+ posts]

Some amps respond to strapping better than others, IA immediately comes to mind.

Some get finnicky strapped at low impedence.

Some get finnicky strappes at high voltage.

Weve had issues with bc 5500s strapped at high voltage. But not at standard voltage

 

[Kam311]

Well now I know why people ask about strapping vs. running 1 amp per sub.

I don't think you do, because that has nothing to do with what he even talking about. We aren't disputing strapping or gain matching.

He is saying that two 3500s wired to 1ohm each is going to produce the same power as 1 3500 wired at .5 ohm.

Maybe for a burp but not on music, and that's assuming a 2x rise which we can't really assume. Change it to a 30% rise and things change. Either way, I don't think anyone will argue the fact that two 3500 are better than one, especially in the long run and for head room.

 

[Boomin_tahoe 5,000+ posts]

I don't think you do, because that has nothing to do with what he even talking about. We aren't disputing strapping or gain matching.
He is saying that two 3500s wired to 1ohm each is going to produce the same power as 1 3500 wired at .5 ohm.

Maybe for a burp but not on music, and that's assuming a 2x rise which we can't really assume. Change it to a 30% rise and things change. Either way, I don't think anyone will argue the fact that two 3500 are better than one, especially in the long run and for head room.

Maybe I do, maybe I don't. I think rise plays a big factor if a person had 2 of the same amps and 2 of the same subs. To me it doesn't matter if the amps were strapped to run the subs or run 1 amp per sub, and keep it simple. Guess he'll have to try it out, if he chooses to .

 

[Hertz Mafia]

I don't think you do, because that has nothing to do with what he even talking about. We aren't disputing strapping or gain matching.
He is saying that two 3500s wired to 1ohm each is going to produce the same power as 1 3500 wired at .5 ohm.

Maybe for a burp but not on music, and that's assuming a 2x rise which we can't really assume. Change it to a 30% rise and things change. Either way, I don't think anyone will argue the fact that two 3500 are better than one, especially in the long run and for head room.

I was louder on music wired at .33ohm with one crossfire 8k then wired at .66ohm two 8ks gain matched... I'm a believe in wiring lower on a single amp will be louder but it drops efficiency and then comes the heat lol

 

[bgaff45]

There have been a handful of VERY loud ones, but it is unusual and unless you had a really good reason to do so I don't see any point particularly going ported where it's going to very much simplify building the port to share airspace.


So does "rise" go up with different brands of amps too, or just when you strap them?

I never said that gain matching doesn't gain, but the impedance of the subs in the box doesn't magically change based on what amp you hook up to them.

Were you in Sanford this weekend?

Anyway, I'm not impressed with low tuning, but I suppose that's what Sundown designs these for so give it a whirl, if you like listening to slowed music you'll be thrilled.

Yeah im not going to be listening to slowed music or doing any comps. This is my daily driver and gonna be used for regular music

 

[bgaff45]

I was louder on music wired at .33ohm with one crossfire 8k then wired at .66ohm two 8ks gain matched... I'm a believe in wiring lower on a single amp will be louder but it drops efficiency and then comes the heat lol

Exactly. I don't want to fry an amp. This whole **** started back in the day when I accidently ordered d2 subs instead of d1. Was gonna go down to one ohm but had to learn from my mistake. Not selling the **** cuz it's too late for that. Rookie mistake. But yeah I don't wanna go to .5 ohm. This is daily driver and not for comp use.

 

[Buck 5,000+ posts]

I think the best way to figure out anything is to test it //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[Kam311]

2 x's on 8k is going to be one hell of a daily driver lol

 

[Boomin_tahoe 5,000+ posts]

That's a lot of power for two subs. Keep eye on mechanical limits of both subs.

 

[Kam311]

As long as it's clean signal I don't worry too much about those sub's on that power

 

[Boomin_tahoe 5,000+ posts]

True. But....it's a just in case factor. I do not know how much actual power they can take. I know the 1250 rms is way underrated.

 

[hispls 5,000+ posts]

Yeah im not going to be listening to slowed music or doing any comps. This is my daily driver and gonna be used for regular music

I'd start by tuning more up around 37-38 hz with a large port and a plan to shrink or extend the port if you feel you'd like to try lower tuning. Sono tube port is an easy method, but a large slot port with the option to add an insert or more layers on the inside to shrink area also work.

Have a plan going into it. It's far easier to lower tuning than to raise it after the box is built.

I think the best way to figure out anything is to test it //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

This is the truth.

True. But....it's a just in case factor. I do not know how much actual power they can take. I know the 1250 rms is way underrated.

If we're still talking about OP's Sundown Z's, they still use 3" 4 layer coil and unless it is wildly different from V1, 2, or 3 I'd say the 2000W rating may be optimistic, Ive used those coils plenty and they're good but not magical. If the Z motor still fits the 8 layer Nightshade coil you'll fare a bit better, but still a 3500W amp is plenty capable of melting any 3" coil if you're not sensible about things.

 

[bgaff45]

True. But....it's a just in case factor. I do not know how much actual power they can take. I know the 1250 rms is way underrated.

They are rated at 2000 each. Underrated

 

[shredder1 10+ year member]

If he has 2x rise around his peak each amp will see 2ohms (2ohm x 2xrise) or about 1900watts per amp If he wires to .5 and rises to 1 ohm he is right around 3500

So 2 amps strapped he around 3800w at his peak

1 amp at .5ohm is 3500w

Just throwing out rise numbers but you get the idea

Also this is around peak so music throw all that out the window

But rise doesn't really matter for music anyway

What if the amps are strapped at 1 ohm?.. just a question... I know the OP is not doing this...

 

[Boomin_tahoe 5,000+ posts]

They are rated at 2000 each. Underrated

What exact subs do you have?