Anyone running their EP1500 or 2500 2ohm?

[Darren]

I'm mostly just curious how the amp perfoms with a 2 ohm load. I might give it a whirl just for fun but wondered if anyone is currently running a 2 ohm load with good results.

Darren

[jynx]

Right now I'm driving my DVC TC-2000 with a EP2500 at 1.5 ohm's with no trouble.

[Darren]

Interesting, do you crank it much?

[pseudonym]

im interested in this as well. my dad just installed his IB with 4 rlp 15 d2's in an array, i believe its called. hes running 2 ohm stereo on his behringer ep1500 and hes considering picking up another one and giving each sub its own channel at 1 ohm.

[brady]

I had mine running 8 ohm and tried 2 ohm for a while. It didn't seem to make much difference since I was already getting enough power, so there wasn't any reason to stress the amp for nothing. I remember thinking it sounded better in 8 ohm, although that was some time ago and even though I have a great memory it's quite short ;D

[arne1970]

I running my EP2500's in bridged mono which equals a 2 ohm
stereo configuration.

This stresses the amp much more than ordinary 4 ohm stereo,
resulting in much more heat losses from the EP amp.

My EP's are powering full range speakers.

[canaris]

I own a www.directproaudio.com/product.cfm?directid=53538 Crest CPX2600 which is proabably made in the same factory as the Ep 2500 .. it wieghs 49 pounds and even tough some sellers advertise it as being able to run 2 ohms the manufacterer says otherwise:



Hello,
Thanks for your questions and support of Crest Performance amplifiers.
Using this amp in the stereo mode at 2 ohms per channel isn't
recommended. "UL"/Underwriters Laboratories didn't approve it, so we
agreed to abide by their decision and not promote this idea. I know
there are some people using this type amp bridged at 4 ohms which is
equivalent to 2 ohms stereo but they are using a band limited frequency
response such as 40Hz to 150Hz. I can't guarantee that there would't be
a problem under certain conditions. The fact of the matter is that no
amp will be operating optimally with a 2 ohm load. You'll get the most
long term continuous power with a 4 ohm load on each amp channel. The 2
ohm rating is more of a peak rating in reality. Thanks,
Aubrey

[nik1818]

i acidentally had mine hooked up at 1 ohm for a while. the only things i noticed were increased sensitivity to gain knob adjustments and a more notcible humming.

[kadiddle]

I was reading the EP2500 manual, it says not to run it 2 ohm when in bridged mono mode, but says nothing about stereo. It even gives specs for running in 2 ohm stereo. (1200w) I think I will run each of my two manifolds off of a separate channel, speakers wired in parallel. This will be a 2 ohm load, but it won't be in bridged so I think it's ok.

[frodaddy]

With my EP1500 I tried 2ohm bridged mode, and if the amp clips at all it will cut the signal for 10-15 seconds. For some reason it seemed to clip all the time in this mode.

I rewired everything to 2ohm stereo, and everything works perfectly now. My gain is set to 26 on each channel (3/4 of the way up). The amp will get warm when playing demo scenes, but it's nothing to get worried about. My IB is in another room so I have the OEM fans on the unit.

[ginmtb]

I'm currently running my EP1500 in bridged mono 4ohm load (1,400w). I just got two Q18's with 2ohm single voice coils so I'll run my EP1500 at 2 ohms stereo (700Wx2). If the specs are correct, bridged mono has more distortion at 4ohms than stereo at 2ohms. Of course as others have pointed out, bridged mono is effectively running the speakers at 2ohms. So I don't really know. Currently I have no problem with the bridged mono setup.

[chrisbee]

An engineer who runs his own PA company told me that no amps should be run at 2 Ohms per channel (= 4 Ohms bridged) whatever the purpose.

Others might argue that an IB isn't so hard on a pro amp as a live gig.

If you do run such low impedances I would suggest you avoid the quieter fan mods.

Have you actually tried running your IB drivers in series for an easier load just to check the result?

If you are backing off the attenuators on the EP2500 when bridged you might be just as well off with series drivers and fully clockwise settings on the amp.

[htnut]

Running Nady's at 2 ohms and they don't even get warm with a fan mod during testing with sine waves. I will see what the Tapco does if my wife ever leaves the house for a few minutes so I can do the amp install and cal.

Tapco's claim to fame with the Juice series is that they run very well indeed with low impedance loads. Supposedly better than any other pro amp they tested. Of course who believes a car dealer?

[flashjim]

Four 18s on an EP2500 running 2Ohm stereo. I haven't pushed it much since it's a new installation.

[pseudonym]

well, months later and many movies later, the ep1500 is running like a champ at 2ohms stereo. anyone have any success running it at 2ohms mono?

[penngray]

Run 4 Q18s at 2 ohms with the EP2500 mono bridged (2400W).


worked great for 9 months, thump away at a new years eve party, did trip the powerstrip it was plugged into.

Note: I always needed a cleanbox between my Receiver and the amp Started messing with the cleanbox recently when I learned that it has a filter that blocks low Freq

[norpus]

I'm currently running SGR 501 at 2 ohms (it is a 4ohm amp)- manufacturer visited and we put it to stress test with U571 at 400watts according to his oscilloscope. All it did was stress my house structure and the neighbours complained. ;D He was happy to let me keep it at 2 ohms
Bwfore I had a dedicated sub amp, I used 2 ch of my 7ch power amp (2x300watt 4ohms). Trouble was I wired driver in parallel in error so was running 2 ohms without realising for some time. I had that designer/manufacturer round later and told him - he said it would be OK as he stress tests at 2 ohms no problem.
I guess these local amps have a good safety margin inbuilt - I'm glad to support them