Question about Sony XM-2252HX Car Audio Amplifier

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XM-2252HX hello i have 2 amp of this model one is completely burn , but the second work but goes easily in short circuit load with a sub 4 ohms , i want to know how i can set up the idle current of that amplifier ?? i didn't found the service manual on the internet ( sorry for my english but i'm french )

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The idle current (bias current) of the output section is set at the lowest point that will prevent notch distortion. Setting it higher will only make the amp run hotter. It has nothing to do with the protection circuit.

You should check the woofer's DC resistance with an ohm meter to confirm that it's close to the rated impedance. You should also check the wiring to make sure it's not shorting to ground (which could cause the amp to go into protection).

Posted on Nov 05, 2007

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I need to know how to hook up an alpine v12 amp 2 ohm i have two tens


Hi there,

This really depends if your 10" subs are 4 ohms each or 2 ohm - for this exercise, I'm presuming they are 4 ohm each.

You already know your amp can deliver 600W RMS (@ 2ohm), so you need to be careful you do not exceed the maximum RMS input power of your subs.

Normally you would wire subs in "parallel", which would reduce the circuit load to 2ohms - however, the 600W RMS power may be too high for your subs to handle.

In this case, it may be safer to wire your subs in "series" - this will increase the circuit load to 8ohms, which will effectively decrease the amps RMS power output.


Cheers,

Sep 05, 2011 | Alpine MRD-M605 - V12 MONO AMP 600WX1 RMS...

1 Answer

I installed the MTX Audio JackHammer JH300 600W, Class D in my truck. Powering two alpine type-s 10' subs. Im using a 50a fuse at the battery. 8 gauge B and ground. I had the subs working went for a drive...


Your amp should not have a 50 amp fuse at the battery. It puts out 300 watts RMS (continuous power). The fuse at your battery should match the one that is on the amp itself. Your amp is overheating and there is a fault, possibly your speakers are wired to present too low of an impedance to your amp. Disconnect them from your amp, and use an ohmmeter/multimeter and measure the resistance load. It should not be lower than roughly 2 ohms. Depending on whether you bought dual 2 ohm or dual 4 ohm subs, that could be the heart of your problem.

If you bought D2 subs, you can get a 4 ohm load per sub with each sub's voice coils in series, and then parallel them together to get a 2 ohm load at the amp, which is perfect for your amp. Or you can wire each sub's voice coils in parallel, so that they're 1 ohm each, and then series them together at the amp for a 2 ohm load. The first method is simpler. Be sure that you haven't wired each voice coil in parallel (1 ohm per sub), and THEN also wired both subs in parallel to the amp (1/2 ohm load). That would definitely send your amp into protection mode, probably before it would have a chance to overheat. This is another reason why you should not have used a 50 amp fuse under the hood. If for whatever reason, the fuse on your amp doesn't blow, the amp is getting way too much current for it to handle, because of that 50 amp fuse under the hood.

If you bought D4 subs, you have a problem. If you've wired each sub's coils in parallel (2 ohm per sub) and then wired both subs together in parallel at the amp (1 ohm load) you're presenting too low of a load to your amp. Again, this will overheat your amp and send it into protection mode, both of which are what you're seeing. You never want to have two D4 subs with an amp that only handles 2 ohms, because you can't get a 2 ohm load with two D4s. You're stuck with 4 ohms or 1 ohm. 4 ohms cuts your amp power in half, 1 ohm cuts it off completely.

If you know for sure which way you've wired them, then you now have the information to tell you whether you've done it incorrectly or not. If you're not sure, first disconnect your subs and measure the resistance as I described in the first paragraph. If your amp is seeing a 1 ohm or 1/2 ohm load, there's your problem. If you see a 2 ohm load (subs are wired correctly after all) then you may have a bad ground connection, or your amp is bad and needs to be serviced/replaced.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/reginald_bec291de192ca44f

Nov 15, 2017 | MTX JackHammer JH300 Car Audio Amplifier

1 Answer

Have a 2000 gmc sierra ext cab pickup and two type R swr-1042d subs and would like to know the best enclosure for the subs to get maximum performance and the best ways to hook up a one channel mono alpine...


it depends on the amp what can it handle. will it do 2 4 or 8 ohm is it 1 ohm stable are the subs dual 2 ohms or dual 4 ohms. 1042s are dual 4 ohm subs so if you wire them both in paralel it will drop both subs into a 2 ohm load for each sub that is pos of one coil to pos of sec coil then pos to pos on amp and same with neg to neg to neg on amp. now if your amp is 1 ohm stable i would do both subs the same way you will get the most power out of the amp. but itll run a littl hot if you dont have adaquate power running to the amp. now i wanna think your alpine amp maybe only 4 ohm stable. i would run both subs like i had said pos to pos then neg to neg now both subs will be a 2 ohm load so what you do to bring it back up to 4 is you run the 2 bridged subs into a series which is pos from one sub to neg of the other sub the remaining pos and neg will run to the amps pos and neg. which will make it into a 4 ohm load. now the last scenereo is your amp is 4 ohm or 2 ohm stable. this is how to wire it to 2 ohms and not 1. take one sub go pos to neg then pos to pos on amp and neg to neg on amp this will make an 8 ohm load with one sub take other sub and do the same neg to pos on sub then pos to pos on amp and neg to neg on amp this will tell amp to run a 2 ohm load. 2 ohms is a good run for these subs if the amp can handle a 2 ohm load. now if you would have given the amp model number i could have looked it up to just give you what you needed but with this short info i gave all possibilities.

Apr 20, 2010 | Alpine Type-R SWR-1042D Car Subwoofer

1 Answer

Loads


Hello ronnieyannon,

Yes. As long as the subs are paralleled, the final load is 2 ohms.

Hope this helps.

Oct 15, 2009 | Alpine MRP-M500 Car Audio Amplifier

1 Answer

Ohm calculations; 4 and 8 ohm sub woofer?


+ output from amp to + input of 4 ohm to + input of 8 ohm AND - output from amp to - input of 4 ohm to - input of 8 ohm is a parallel circuit = 2.66 ohm impedance load for amp
+ output from amp to + on 4 ohm - on 4 ohm to + on 8 ohm - on 8 ohm to - of power amp is a series circuit = 12 ohm impedance load for amp. Clear as mud??
Clear as mud?

Jun 11, 2009 | Jl Audio 12W0 Car Speaker

1 Answer

When i connect both subs(jbl gt 1041d) my amp goes to protection and when i ony hook one up it doesnt go to protection


Hello lilcylentsur,

It sounds like when you connect both subs, the impedance match is too low for the amp to handle. 2 4-ohm DVC subs with both the coils and subs wired in parallel will present a 1-ohm load which is too low for most amps.

The solution is to wire the voice coils in series, (connect a short jumper from one positive to the other negative on each sub). and then wire the remaining terminals to your amp. This will result in a 4-ohm load which most amps can handle.

Here's a "wiring wizard" which allows you to see the ohm loads of different wiring configurations.

Hope this helps.

May 07, 2009 | JBL GT1041D Car Speaker

1 Answer

Amplifier loads


Hello ronnieyannon,
A single 4 ohm speaker wired to each channel, like you have them wired, presents a 4 ohm load. And it appears that you have them connected properly. The 401s is only stable to 4 ohms when bridged, so if you were to parallel the 2 4 ohm subs in bridged mode, the load would be 2 ohms and the amp would most likely overheat and go into protection.

I'd wire them the way you have them wired.

Each channel of the amp outputs only 100 watts into 4 ohms. That is adequate for regular full-range speakers, component speakers, mid-range drivers, and even some small subs. But it is a little low on power for most subwoofer applications.

Hope this helps.

Apr 22, 2009 | Rockford Fosgate Punch 401S Car Audio...

1 Answer

How do i wire two fifteen inch subs to 2 ohms


Hello familia_gome,

If you have 2 subs that are 2 ohms, the final impedance will be either 1 ohm if they are wired in parallel or 4 ohms if they are wired in series. You cannot get a final load of 2 ohms. Unless your amp is stable down to 1 ohm (many amps are not), your best solution would be to wire the subs in series, positive of one sub to the negative of the other sub, and the remaining positive and negative to the amp. Yes, this will result in a 4 ohm load and the amp power will be reduced. But it is better than destroying your amp with too low of a load, and the subs will work fine, just not as loud.

Apr 05, 2009 | Alpine Type-R SWR-1222D Car Subwoofer

1 Answer

Protect mode


The only thing to try would be to remove the sub wires form the amp and see if it still goes into protect. If it still goes into protect with the subs unhooked then the amp will require repair.. If it doesent go into protect then check to see if you have a shorted subwoofer. also make very sure that you have a good clean bare metal tight ground connection to the body of your car. People forget that step all the time.. Did you do your setup with the correct ohm load? Most of these amps will fail if the subs are hooked up incorrectly(too low of a ohm load). If the amp has a lowest possible ohm load rating of 4 ohms... but you have a pair of 4 ohm subs.. you hook them up togther at the amp.. both positives togther- two negatives togther.. because it "bumps harder" that way.. Then you now have a 2 ohm load on the amp... The lower the ohm load you put on a amplifier the more it will output. The problem when people do this is that the amp outputs more current then its internal parts are rated for and the output transistors (usually) fail.. most amps will not fail if installed correctly.

Aug 20, 2007 | Pyle PLA2180 Car Audio Amplifier

1 Answer

Power Protection Circuit (SORT) Engaged


Umm a ohm meter would help you here. Double check the wires from the sub to the amp...make sure its not shorting out. Try starting the amp without the wires on the terminals...if the protection shows up then there is a short inside the unit and it will need to be replaced/repaired.

Feb 17, 2007 | Kicker ZX400.1 Car Audio Amplifier

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