I would like to know if it is any problem to have three subs connected
to a 1 ohm stable amp 1000W
I want to connect two 2 dual 2ohm 12" 300w each ,series then parallel
to see 2ohm,then
1 dual 4 ohm 15" 400w parallel to see 2 ohm ,then put together to
see 1 ohm.
Is there any problem with this any advice would be appreciated.
Thanks.....

There's no problem with your impedance issue. You CAN do what you are
describing.

But I WOULD NOT DO IT. Using different subwoofer types/sizes/brands playing
the same frequencies (20Hz-80Hz let's say) may cause all sorts of acoustic
problems. There can be weird cancellation at certain frequencies or strange
boosts at other frequencies. That is why mixing subs is almost always NOT
DONE.

However, you could use passive X-over components to have the 15" playing
everything below 50 Hz and the 12's playing 50 Hz to 100 Hz let's say. This
would be the preferred strategy but would still cause problems at the X-over
frequency most likely and would be tricky to construct the necessary passive
X-overs.

If I were you, I would lose the 15". Perhaps sell that and buy a third 12",
which would give you an impedance of 1.33 ohms (if you wired it as you plan
to wire the other two). This would work best, and would nearly fully
utilize your 1000W 1 ohm stable amp.

MOSFET

wrote in message
oups.com...
I would like to know if it is any problem to have three subs connected
to a 1 ohm stable amp 1000W
I want to connect two 2 dual 2ohm 12" 300w each ,series then parallel
to see 2ohm,then
1 dual 4 ohm 15" 400w parallel to see 2 ohm ,then put together to
see 1 ohm.
Is there any problem with this any advice would be appreciated.
Thanks.....

Hey thanks for the reply...The amp i have is the hifonics brutus bx
1000w can the impedence be 1.33 ohms would it be stable ? The reason i
asking is that i thought it had to be 1 ohm exact.. Can u use
impedences within the 1 ohm - 2ohm range?

A guy sent me this reply locally i would like to hear your thoughts on
this please.
Thanks again..
Donald

"you are gonna create some crazy "voltage & current dividers" when you
do that...

I DO NOT RECOMMEND IT.

If you took network analysis you will understand what I am talking
about....

You have to look at each voice coil as a branch or noid...

If you were to do that, and lets say that you obtain a ohm load a
little over or under 1ohm...

when the amplifier puts the 1000rms out the speaker outputs, it will
drop accross the 1st voltage divider... etc...

to make a VERY LONG story short, each sub will be seeing different
amounts of power (voltage & current), depending on their positions in
the network... (box)

exaggerated example: 1sub gets 450rms / 2nd sub gets 400rms / 3rd
150rms "

MOSFET wrote:
There's no problem with your impedance issue. You CAN do what you are
describing.

But I WOULD NOT DO IT. Using different subwoofer types/sizes/brands playing
the same frequencies (20Hz-80Hz let's say) may cause all sorts of acoustic
problems. There can be weird cancellation at certain frequencies or strange
boosts at other frequencies. That is why mixing subs is almost always NOT
DONE.

However, you could use passive X-over components to have the 15" playing
everything below 50 Hz and the 12's playing 50 Hz to 100 Hz let's say. This
would be the preferred strategy but would still cause problems at the X-over
frequency most likely and would be tricky to construct the necessary passive
X-overs.

If I were you, I would lose the 15". Perhaps sell that and buy a third 12",
which would give you an impedance of 1.33 ohms (if you wired it as you plan
to wire the other two). This would work best, and would nearly fully
utilize your 1000W 1 ohm stable amp.

MOSFET

wrote in message
oups.com...
I would like to know if it is any problem to have three subs connected
to a 1 ohm stable amp 1000W
I want to connect two 2 dual 2ohm 12" 300w each ,series then parallel
to see 2ohm,then
1 dual 4 ohm 15" 400w parallel to see 2 ohm ,then put together to
see 1 ohm.
Is there any problem with this any advice would be appreciated.
Thanks.....

Amp in stable at 1 ohm means that the amp can do anything above 1 ohm. The
theory of this guy is correct, but you can still go forward with the since
all the subs are the same relative to the sub "network" provided all subs
are of the same brand and model. Sorry if you already mentioned that.

wrote in message
oups.com...
| Hey thanks for the reply...The amp i have is the hifonics brutus bx
| 1000w can the impedence be 1.33 ohms would it be stable ? The reason i
| asking is that i thought it had to be 1 ohm exact.. Can u use
| impedences within the 1 ohm - 2ohm range?
|
| A guy sent me this reply locally i would like to hear your thoughts on
| this please.
| Thanks again..
| Donald
|
| "you are gonna create some crazy "voltage & current dividers" when you
| do that...
|
| I DO NOT RECOMMEND IT.
|
| If you took network analysis you will understand what I am talking
| about....
|
| You have to look at each voice coil as a branch or noid...
|
| If you were to do that, and lets say that you obtain a ohm load a
| little over or under 1ohm...
|
| when the amplifier puts the 1000rms out the speaker outputs, it will
| drop accross the 1st voltage divider... etc...
|
| to make a VERY LONG story short, each sub will be seeing different
| amounts of power (voltage & current), depending on their positions in
| the network... (box)
|
| exaggerated example: 1sub gets 450rms / 2nd sub gets 400rms / 3rd
| 150rms "
|
| MOSFET wrote:
| There's no problem with your impedance issue. You CAN do what you are
| describing.
|
| But I WOULD NOT DO IT. Using different subwoofer types/sizes/brands
playing
| the same frequencies (20Hz-80Hz let's say) may cause all sorts of
acoustic
| problems. There can be weird cancellation at certain frequencies or
strange
| boosts at other frequencies. That is why mixing subs is almost always
NOT
| DONE.
|
| However, you could use passive X-over components to have the 15" playing
| everything below 50 Hz and the 12's playing 50 Hz to 100 Hz let's say.
This
| would be the preferred strategy but would still cause problems at the
X-over
| frequency most likely and would be tricky to construct the necessary
passive
| X-overs.
|
| If I were you, I would lose the 15". Perhaps sell that and buy a third
12",
| which would give you an impedance of 1.33 ohms (if you wired it as you
plan
| to wire the other two). This would work best, and would nearly fully
| utilize your 1000W 1 ohm stable amp.
|
| MOSFET
|
| wrote in message
| oups.com...
| I would like to know if it is any problem to have three subs connected
| to a 1 ohm stable amp 1000W
| I want to connect two 2 dual 2ohm 12" 300w each ,series then parallel
| to see 2ohm,then
| 1 dual 4 ohm 15" 400w parallel to see 2 ohm ,then put together to
| see 1 ohm.
| Is there any problem with this any advice would be appreciated.
| Thanks.....
|
|