Home Theater Forum and Systems banner

1 - 20 of 26 Posts

·
Registered
Joined
·
3,069 Posts
Discussion Starter · #1 ·
Hi there,

As I have been thinking of running two subs I will have to run each sub in series to give 2 ohms for each driver as they are D1 subs. This would mean I would have to run each channel of the behringer as 2 x 2 ohms, one for each sub. It quotes 1250 watts rms x2 into 2 ohms. Will this put any more pressure on my behringer compared to running 4 ohms bridged. Has anyone run them as 2 x 2 ohms to run two subs?

I wasn't sure if when you run 4 ohms bridge it simply is running the two seperate channels as 1 so it is effectively the same as using the two 2 ohms seperately but combine into one for bridged mode.


cheers

Graham
 

·
Plain ole user
Joined
·
11,121 Posts
Hi there,

As I have been thinking of running two subs I will have to run each sub in series to give 2 ohms for each driver as they are D1 subs. This would mean I would have to run each channel of the behringer as 2 x 2 ohms, one for each sub. It quotes 1250 watts rms x2 into 2 ohms. Will this put any more pressure on my behringer compared to running 4 ohms bridged. Has anyone run them as 2 x 2 ohms to run two subs?

I wasn't sure if when you run 4 ohms bridge it simply is running the two seperate channels as 1 so it is effectively the same as using the two 2 ohms seperately but combine into one for bridged mode.


cheers

Graham
I am not understanding your statements. How do you get two ohms in series? Do you mean parallel?
 

·
Registered
Joined
·
3,069 Posts
Discussion Starter · #5 ·
Thanks for that, I don't have any issues running my dual setup in 4 ohms bridged even at almost reference with no clipping so that should be fine then.

cheers

Graham
 

·
Plain ole user
Joined
·
11,121 Posts
4 ohms bridged is exactly the same stress on the amp as running 2 ohms stereo.
Theoretically, if everything is perfect, it is essentially the same. How amps handle bridging varies, however, and I would not make this assumption in all cases.

The amp will do 2 ohms in stereo, and rather than running the subs in series I would use the amp in stereo.
 

·
Registered
Joined
·
3,069 Posts
Discussion Starter · #7 · (Edited)
Hi there,

I would have to wire the subs in series to get 2 ohms, then wire that sub into channel 1 of the behringer and wire the other sub into channel 2 to get the stereo 2 ohm but in parrallel on the behringer.

Actually after reading the manual that is wrong, defo in stereo and not parrallel as it says in parrallel you only use one input gain to run both subs thus both subs will run at the same level and as they will be in different locations I may have to run at different levels to match up from the listening position. So stereo it is then.


I think that makes sense.

cheers

Graham
 

·
Registered
Joined
·
59 Posts
Yes it will be fine run each of the drivers coils in series so 1 + 1 = 2 ohms and then run each sub off a seperate channel.
 

·
Registered
Joined
·
3,069 Posts
Discussion Starter · #9 ·
Thanks matey. I am going to test my existing 13 cu ft sub as a single sub which should have a qtc of 0.795 instead of 0.930 to see if it sounds any better. Run some graphs to compare and if it does build two single subs and run them 2 ohms each.

cheers

Graham
 

·
Registered
Joined
·
306 Posts
and jsut to finish out the original question, running any amp at a lower Ohms will place more stress on it as it is easier to drive a higher ohm speaker. aka less heat.

but as far as reliability and usage you will be just fine running both subs in stereo off that amp at 2 ohms each. I ran mine bridged at 2 ohms (bad idea as thats 1 ohm per channel) and it soldiered through it. though now i have it at 2 ohms, one channel.
 

·
Registered
Joined
·
48 Posts
I run an EP4000 at 2 ohms stereo and although the air blowing out of it IS warmer than the EP4000 stacked on top of it that runs 4 ohms stereo I have zero issues with the 2 ohm stereo load. These Europower amps are tough - I own 4 of them and they seem pretty indestructible.
 

·
Elite Shackster
Joined
·
7,142 Posts
FWIW I'm running a 2 ohm load with my sub. Its only one one channel but the air being fired out is barely warm and there are no sign of stress I can detect, either in the audio signal or with the amp.
 

·
Elite Shackster
Joined
·
7,142 Posts
Maybe I just live in a cold house. My amp gets sightly warm, but thats about it. The air coming out is certainly keeping it cool, I know, I disconnected the fan to see how warm it would get and how quick, just so I know before swap the original noisy fan out.
 

·
Registered
Joined
·
3,069 Posts
Discussion Starter · #18 ·
I have never used a soldering iron before, sounds lame I know so I have been putting if off a bit to be honest. I guess it is ok once the fan is installed to turn the amp on with the cover off to make sure the fan is blowing in the correct direction.
cheers

Graham
 

·
Registered
Joined
·
48 Posts
No soldering iron necessary at all - I am comfortable w/solder iron but did not see need to use for the fan swap. I used electrical tape and a small piece of heat shrink tubing to wire in the new fan. I have seen the mod done with elec tape alone. Another easy solution is a crimp tool and a male + female plug from a garden variety electrical wiring connection kit - there are many easy ways to join the wire in. Don't put the job off the difference is huge and the work required to perform it is dead easy.
Posted via Mobile Device
 
1 - 20 of 26 Posts
Top