I'm looking for a way to control power supplies to 1 sub for a 2 sub setup. That is, have a switch for turning one of the subs off and only playing one, for more bass options. Heres the kick, the amp is monoblock and i want for when there is only the 1 sub playing, i want it to be recieving all the power as if it were the only sub that was bridged.
If that makes sense and you can figure out my ramblings and you can help me out, it would be huge. Thanx.
sub set up
I think if you were to do this (anything's possible), you'd be disappointed as the amp would "see" a different ohm load and therefore perform differently when switching bewteen the 1 & 2 subs.
What's the main reason to do this? If you want to be able to chnage the low end output of your system with out adjusting the amp gains or settings of your HU, you could add an L-pad.
What's the main reason to do this? If you want to be able to chnage the low end output of your system with out adjusting the amp gains or settings of your HU, you could add an L-pad.
Re: (Rex)
Pretty much y i'm doin this is cuz the bass output of the 2 subs is way too much all the time, and also i'm a lazy guy, i gotta add that, and gettin out of the car to change the gains would be a pain in the ***. Oh yeah, i'm cheap too, i want to do it with next to no money at all or i'm not gunna bother with it. I came up with this idea while i was very inebriated and for some reason i'm hooked to it now. Now i had an idea for having the switch thru the RCA cables since it is monoblock. You think that would work?
The RCA's that run to the amp (monoblock or otherwise) won't really impact the speakers driven unless you had 2 sets of RCA's going to a 4 channel amp and then each half of the amp bridged onto a single sub. You could do what you're discussing that way, but if you already have the monoblock amp that doesn't help.
Assuming you're running a single set of RCA's into 1 monoblock amp, disconnecting (howevere done) 1 of the RCA's would not accomplish what you want to do.
Now on the speaker side of things, the amp's "output" will be different based on the ohm load it sees and switching rom 1 to 2 subs and back will change the ohm load and thus the output of the amp. If switching to 1 sub increases the ohm load (numerically), then the total bass output would drop by more than in half. On the flip side, if switching to 1 sub decreases the ohm load (numerically), then the total bass output of the single sub may see nearly identical to the pair (even though it can't be "identical").
I think there's an answer/solution, but one thing we need to know, is do you already have components that you wanna try to make this work using?
Assuming you're running a single set of RCA's into 1 monoblock amp, disconnecting (howevere done) 1 of the RCA's would not accomplish what you want to do.
Now on the speaker side of things, the amp's "output" will be different based on the ohm load it sees and switching rom 1 to 2 subs and back will change the ohm load and thus the output of the amp. If switching to 1 sub increases the ohm load (numerically), then the total bass output would drop by more than in half. On the flip side, if switching to 1 sub decreases the ohm load (numerically), then the total bass output of the single sub may see nearly identical to the pair (even though it can't be "identical").
I think there's an answer/solution, but one thing we need to know, is do you already have components that you wanna try to make this work using?
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PoorManQ45
- Posts: 16676
- Joined: Fri Jul 02, 2004 5:13 pm
Re: sub set up (420in240)
Ok, I have a few questions for you.
1: Are the 2 subs in seperate chambers, or do they share one large enclosure?
2: How are the subs wired? Series or Parallel?
If the Ohm load stayed the same with only one of the subs playing, these rules would come into play:
2. If the cone area is halved, the cone excursion is doubled: 6. If the excursion is doubled, the acoustical power is doubled:
Now, if the Power output from the Amp were to drop by ~1/2, because of the doubling of Ohms, this would come into play:
8. If the cone area is halved and the cone excursion remains the same, the acoustical power is decreased by a factor of four
Now, if the Ohm load was decreased by 1/2, the Wattage from the Amp would theoretically increase 100%. Twice the power:
6. If the excursion is doubled, the acoustical power is doubled
1: Are the 2 subs in seperate chambers, or do they share one large enclosure?
2: How are the subs wired? Series or Parallel?
Rex, you need to be slaped on the forhead for saying something like that. I do not mean any offenceRex wrote:Now on the speaker side of things, the amp's "output" will be different based on the ohm load it sees and switching rom 1 to 2 subs and back will change the ohm load and thus the output of the amp. If switching to 1 sub increases the ohm load (numerically), then the total bass output would drop by more than in half.
If the Ohm load stayed the same with only one of the subs playing, these rules would come into play:
2. If the cone area is halved, the cone excursion is doubled: 6. If the excursion is doubled, the acoustical power is doubled:
Now, if the Power output from the Amp were to drop by ~1/2, because of the doubling of Ohms, this would come into play:
8. If the cone area is halved and the cone excursion remains the same, the acoustical power is decreased by a factor of four
Now, if the Ohm load was decreased by 1/2, the Wattage from the Amp would theoretically increase 100%. Twice the power:
6. If the excursion is doubled, the acoustical power is doubled
Not saying I haven't said somehting that's deserves a "D'oh", but I don't think I discussed a scenario where he goes from 1 to 2 subs or vice-a-versa without changing the ohm load??
But if you re-read my statements in short they were this ..
Going from 1 to 2 subs and from 4 to 8 ohm, not significantly louder.Going from 1 to 2 subs and from 8 to 4 ohm, signifcantly louder, possibly enough that when you go back to 1 sub it "sounds" like you have none.
But if you re-read my statements in short they were this ..
Going from 1 to 2 subs and from 4 to 8 ohm, not significantly louder.Going from 1 to 2 subs and from 8 to 4 ohm, signifcantly louder, possibly enough that when you go back to 1 sub it "sounds" like you have none.