I can't find any info online that tells me one way or another if I'm interpreting the manual correctly. Please see page 4 of the pdf (vertical page headed "Connections" under the doublewide page) and read the note for the "Low Impedance" switch labeled "b". I read it as the amp will run a 1 Ohm load per channel in stereo and presumably a 2 Ohm load bridged, what do you guys think?
https://www.nrg1.com/Alp_bruksanvisninger/Owners/M/MRV-1505/68P90664W91-B.pdfAnd perhaps more importantly, will running a 2 Ohm load bridged actually produce more power than a 4 Ohm load? Or do you think it is just to give you more wiring options for you subs that you already have and it does some internal shunting of some sort to run the lower impedance load but the actual power provided to the load doesn't increase.
Thank you for any input or ideas as to where to find this info,
Mike
on most amps the lower the impedance, the more power you get, providing you have enough current to supply your amp
Ohm's Law: to find Power, P=E^2/R
Power is output watts, E is voltage squared divided by R which is the ohm load on the amp. With this, you can see that the amp will produce twice the amount of power if the ohm load is halved. (Change the R value from 4 to 2)
-------------
Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
Switch_hitter and stevdart, I'm aware of Ohm's law and how it affects power. As I understand it, power doesn't usually go up linearly, as the amp becomes less efficient when it runs at higher temps.
Anyway, that is besides the point. What I am asking is if the amp CAN be operated at a 1 ohm per channel or 2 ohm bridged load. I get conflicting information from the tech at Alpine I talked to, the Alpine manual for my model of amp, and the info I have found online. If you follow the link and look at the page I described you will see it seems to say the amp WILL run at 1 ohm per channel, but I'm wondering why it isn't stated in the spec sheet part up top. Instead, only the 4 and 2 ohm per channel ratings are given.
My original post from above:
I sat on hold for 20 mins to talk to Alpine tech support earlier and asked them about running the amp @ 2 ohms bridged or 1 ohm per channel stereo. The guy said no right away. Then I told him what the manual said and had him go pull it. He came back and said yeah, he guessed it would run 1 ohm stereo/2 ohm bridged.
But, he said he used to run MRV-1005’s (100 X 2 version of my amp) for db drags and he tried running it at low impedance and it went into protect mode instantly when the bass hit.
However, I’ve seen posts on other internet audio sites about people running older Alpine amps at 1 or less ohms per channel and they pump out great power and take it no problem. Except for running very hot.
Since the guy didn’t know about the ability of the amp to run @ 1 ohm per channel until I pointed it out to him in the manual, I’m not sure of his credibility or knowledge of the product. Also, seems like you’d need a herd of MRV-1005’s for db drag racing.
Does anyone run their Alpine at 2 ohms mono or know anyone who does?
I want to run one JL10W3-D4 wired for 2 ohms on the amp bridged, should give it a good workout :-)
Thanks,
Mike