CLuTZ
Diamonds are forever....
OUt of curiosity- how were you running 2 subs off a 1 channel amp?
Split questions thread for subs and amps
- Thread starter CLuTZ
- Start date
Help Support 4GTuner:
iluszn
Well-Known Member
the amp appears to be a 2 channel amp.
but if you have a monoblock that will run to 2ohm stable. then you can run the subs in parallel.Run them like this and the load impedence on each sub is lowered thus putting out more accoustic sound.
so if you had a 300WRMS amp mono block that could load 2ohms stable, you could run 2 x 300WRMS subs off the amp in parallel and have each sub get 300WRMS @ 2ohm
Run just 1 sub off the single channel and you get 300WRMS @ 4ohm
INFO: http://www.termpro.com/articles/spkrz.html
hope this helps..
NOTE:: Cheap amps usually are not 2ohm stable. Unless it states otherwise..
but if you have a monoblock that will run to 2ohm stable. then you can run the subs in parallel.Run them like this and the load impedence on each sub is lowered thus putting out more accoustic sound.
so if you had a 300WRMS amp mono block that could load 2ohms stable, you could run 2 x 300WRMS subs off the amp in parallel and have each sub get 300WRMS @ 2ohm
Run just 1 sub off the single channel and you get 300WRMS @ 4ohm
INFO: http://www.termpro.com/articles/spkrz.html
hope this helps..
NOTE:: Cheap amps usually are not 2ohm stable. Unless it states otherwise..
iluszn
Well-Known Member
hahahahahaha.
and people kept accusing me of poor work.. I just kept telling them its the cheap junk that amps they are buying killing subs/speakers
Been there, done that. Seen subs die because they decide to wind up the gain on amps and pole the sub to death..
But the amp in this for sale thread should be fine to run the subs.
Luck with the sales.
OH also monoblock means single source inside splitting into 2 mono channels, and usually more beefier power supplies and power output.
and people kept accusing me of poor work.. I just kept telling them its the cheap junk that amps they are buying killing subs/speakers
Been there, done that. Seen subs die because they decide to wind up the gain on amps and pole the sub to death..
But the amp in this for sale thread should be fine to run the subs.
Luck with the sales.
OH also monoblock means single source inside splitting into 2 mono channels, and usually more beefier power supplies and power output.
CLuTZ
Diamonds are forever....
I thought you couldn't run a 4 ohm sub at 2 ohms though??
Maybe we should split this off to a new topic!
Maybe we should split this off to a new topic!
iluszn
Well-Known Member
Depends.
Car amps by design are generally going to be 4ohm standard.. Some more high end amps will be able to do
4/2/1 ohm stable. Thus you dont need as many amps but can use more subs
the amps most people use will only be 4ohm.
Car amps by design are generally going to be 4ohm standard.. Some more high end amps will be able to do
4/2/1 ohm stable. Thus you dont need as many amps but can use more subs
the amps most people use will only be 4ohm.
doommachine
Well-Known Member
By changing the way the load is applied to the amp, the impedance can be worked around.
It's fine to run a 2 ohm amp into a 4 ohm load - think of it as pipe sizes, and the bigger the impedance, the smaller the pipe. If an amp can deliver at 2 ohms, and you feed it into a 4 ohm speaker, that's perfectly OK, but you won't be taking full advantage of the amplifiers power. (However, if you're talking about a realllly cheap amp, it's probably not able to do that , ie, if it pushes too high an impedance it will screw up. Most 2 ohm capable amps aren't cheap though.)
Conversely, running a 4 ohm amp into a 2 ohm speaker WILL cause destruction of the amplifier, speaker or both, the 4 ohm amp is "pushing" 4 ohms, but the resistance it faces is merely 2, so it works itself to death (as impedance decreases, so does effective power output, and since most amplifiers lose half their energy to heat.. doubling the power can double the heat.. bye bye amp).
As far as running multiple speakers from a single channel, that's not a problem either.
Wiring in series (ie, amp positive, speaker positive, speaker neg to next speaker pos, speaker neg to amp neg) simply adds to the load, ie 2 x 2 ohm speakers in series = 4 ohm load.
You can also wire speakers so as not to increase impedance, by wiring them in parallel - ie, the positive terminal of the amp goes to both positives on the speakers, and same on the negative side. Working out the impedance this way is a bit more complicated.
imp(total) = (imp(spk A) * imp(spk B)) / (imp(spk A) + imp(spk B)
Basically if you have 2, 4 ohm speakers, it is as follows
4 * 4 / 4 + 4
16 / 8
2 ohms.
So, if you have a single channel, 2 ohm amp, and you want to drive 2 subs through it at maximum power, you want two 4 ohm subs. (wattage decreases however, can't remember the formulas for that)
Of course you can do this with more than 2 speakers, and in combinations with itself (ie 2 parallel wired sets of in series speakers)
It's fine to run a 2 ohm amp into a 4 ohm load - think of it as pipe sizes, and the bigger the impedance, the smaller the pipe. If an amp can deliver at 2 ohms, and you feed it into a 4 ohm speaker, that's perfectly OK, but you won't be taking full advantage of the amplifiers power. (However, if you're talking about a realllly cheap amp, it's probably not able to do that , ie, if it pushes too high an impedance it will screw up. Most 2 ohm capable amps aren't cheap though.)
Conversely, running a 4 ohm amp into a 2 ohm speaker WILL cause destruction of the amplifier, speaker or both, the 4 ohm amp is "pushing" 4 ohms, but the resistance it faces is merely 2, so it works itself to death (as impedance decreases, so does effective power output, and since most amplifiers lose half their energy to heat.. doubling the power can double the heat.. bye bye amp).
As far as running multiple speakers from a single channel, that's not a problem either.
Wiring in series (ie, amp positive, speaker positive, speaker neg to next speaker pos, speaker neg to amp neg) simply adds to the load, ie 2 x 2 ohm speakers in series = 4 ohm load.
You can also wire speakers so as not to increase impedance, by wiring them in parallel - ie, the positive terminal of the amp goes to both positives on the speakers, and same on the negative side. Working out the impedance this way is a bit more complicated.
imp(total) = (imp(spk A) * imp(spk B)) / (imp(spk A) + imp(spk B)
Basically if you have 2, 4 ohm speakers, it is as follows
4 * 4 / 4 + 4
16 / 8
2 ohms.
So, if you have a single channel, 2 ohm amp, and you want to drive 2 subs through it at maximum power, you want two 4 ohm subs. (wattage decreases however, can't remember the formulas for that)
Of course you can do this with more than 2 speakers, and in combinations with itself (ie 2 parallel wired sets of in series speakers)
rob323
Don't drive it, RALLY it!
doommachine said:
The wattage output for a 2 ohm load should still be somewhere near what the specs for the amp indicate (the damping factor per sub will not though), it won't necessarily decrease for multiple subs as long as the impedance remains the same. Each sub in a bank of multiple subs will see less power, but your efficiency/ volume level is increased by the extra cone area and this out ways the loss in power per sub. That's the whole beauty of series/ parallel wiring.
Edit: I just re-read that, god it makes me sound like a nerd :? Now where's my pocket protector gone?
CLuTZ
Diamonds are forever....
Okay I have a JL audio 12W6V2 hooked up to a Rockford Fosgate P6001 amp, and i'm fairly sure its hooked up @ 4ohm, as I know the sub can go louder than what it currently does.....
Now the sub is dual voice coil, so I can run the amp like this?
That'll mean instead of 300W RMS, it'll be getting 600W RMS- which sounds alot better if you ask me! These subs can handle 1000W RMS apparently!
Now the sub is dual voice coil, so I can run the amp like this?
That'll mean instead of 300W RMS, it'll be getting 600W RMS- which sounds alot better if you ask me! These subs can handle 1000W RMS apparently!
rob323
Don't drive it, RALLY it!
Is the sub dual 4ohm vc's? if so, then yes you can hook it up like that as long as the amp is 2 ohm stable.
Dean
Member
yep,
because its a dvc sub
in that setup that sub is now running at 2ohm
a dvc 4 ohm sub = 2 ohm when in parallel or 8 ohm when in series.
which is where u may b getting confused, because it says 4 ohm, u dont get 4 ohm out of it (if that makes sense) it gets hooked up to give u 2 ohm or 8 ohm... :wink:
because its a dvc sub
in that setup that sub is now running at 2ohm
a dvc 4 ohm sub = 2 ohm when in parallel or 8 ohm when in series.
which is where u may b getting confused, because it says 4 ohm, u dont get 4 ohm out of it (if that makes sense) it gets hooked up to give u 2 ohm or 8 ohm... :wink:
iluszn
Well-Known Member
YES.. only because your amp supports 2ohm load
300 watts RMS x 1 at 4 ohms (600 watts RMS x 1 at 2 ohms)
is what is stated for this monoblock amp
If it was 300WRMS @ 4ohm only. then no , you wouldnt risk burning out your equipment.
300 watts RMS x 1 at 4 ohms (600 watts RMS x 1 at 2 ohms)
is what is stated for this monoblock amp
If it was 300WRMS @ 4ohm only. then no , you wouldnt risk burning out your equipment.
CLuTZ
Diamonds are forever....
iluszn said:
How do you know if your amp is pumping out 2ohm or 4 ohm? If its been bridged?
I always thought it was receiving 600Wx1 @ 4Ohms- but thats impossible right- going off the amp's quoted ratings?
I should have listened a little better in science at school! :lol:
Dean
Member
it does it by itself...
depends on the sub thats connected to it :wink:
check the specs of ur amp for impedence ratings
depends on the sub thats connected to it :wink:
check the specs of ur amp for impedence ratings
CLuTZ
Diamonds are forever....
Dean
Member
right so its a dual 4ohm sub, thereforeCLuTZ said:
if u connect it to ur amp in parallel it will b running at 2ohm
if u connect it to ur amp in series it will be running at 8ohm...
CLuTZ
Diamonds are forever....
Nice one. Im going to pull the sub out of the box and see how its running- fingers crossed I can run it on 2ohm, and get it cranking even more lol 8)
Dean
Member
yep,
just wire it the same way as u posted up that diagram...
nice sub btw...
just wire it the same way as u posted up that diagram...
nice sub btw...
i just have a question, why do you want to run that sub on 2ohm???,
these subs are made for a very clear sound quality and if you gonna run it on 2ohm it will run louder but not as clear.
in my opinion just run your amp on 4ohm, and these subs are good already or if you really want it to be louder invest in a bigger 4ohm amp.
these subs are made for a very clear sound quality and if you gonna run it on 2ohm it will run louder but not as clear.
in my opinion just run your amp on 4ohm, and these subs are good already or if you really want it to be louder invest in a bigger 4ohm amp.
Similar threads
Latest posts
-
-
-
Wanted My RvR stolen in Corby UK help please M530GCD- Latest: Sebastian Yanek