Question about Sony XM-1252GTR Car Audio Amplifier

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Sony Xplod 1200w

Ive go the amp runing bridged to a alpine type r at 4ohms. Worked fine for a week or two. But now the amp powers on and then the blue light dims and no sound comes out???

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Check your remote wire... usually your remote wire isnt connected properly; or your fuse from the battery to the amp is blown

Posted on Nov 03, 2008

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  • 119 Answers

Either the speaker is shorted out (blown), or the output transistors in the amplifier are bad. Try hooking up another speaker to the amp. If it plays, the amp is good. If not, then the amp is bad.

Posted on May 23, 2008

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1 Answer

What amp would be better to use with what speakers/sub? I have a KAC-7202 kenwood 920W maximum power (150wX2 RMS, 4ohms) (230wX2 RMS 2ohms) and then the other amp I have is a Alpine MRP-M500 mono power...


I'm using that Alpine right now for 2-12" subs and I have compared it to 6 or 7 other amps this month and most were 4 channel 150Watt/Channel Bridged to 300Watts x 2 and found the Alpine to be superior in both sound quality and loudness. The Alpine has also not turned off even with full volume for hours at a time, Very solid amp I was very surprised due to it's size!

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Is the sony xplod cdx-gt71w able to support a subwoofer without another amp


Sure is.

The sony is bridgable as follows:

  • 100W x 4 @ 4 Ohm
  • 100W x 2 + 250W x 1 @ at 4 Ohm

  • This will allow 2 channels to run 100 watts each @ 4ohms with an additional single channel with 250 watts @ 4 ohms.


    The single sub channel is created by bridging channels 3 & 4

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    I have 2 12'' subs 1300.watts and 2 1200watts amps both bridge to push 2400.00watts do not sound lond enoungh


    impedance mismatch cud be the culprit. make sure ur speakers are the right ohms for ur amp. most amps are designed to operate on a 4 ohms speaker load on bridge mode. some amps are never designed for bridge mode. so if u bridge these amps u will get less output. u have to be very careful when u make the connections. plus when u bridge two amps for 4 ohms load, the total impedance becomes 8 ohms. make sure ur speakers are 8 ohms. few ohms can make big difference on power amps.

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    I would like know whether a sony xplod subwoofer can be connected to my alpine car audio system! xplod sub woofer is 1100 watts.


    Deffinitely but wired directly would be pointless, the Alpine's internal amp is way to weak to get the best out of the sub. You need an amp, minimum 300w and bridge the outputs to give all the power to sub preferably switched to low-pass (most amps will have a high / low pass switch)

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    Random Protection mode.


    Disconnect all speaker connections and rca cables. Leave power, ground and remote wires intact. Try turning on again. If you still have a protection light your amp is faulty. Hopefully you have warranty. Clipping means you have exceeded capacity. .A thumbs up would be greatly appreciated if this answer is helpful to you. random-protection-mode-lv2kkrmxrai4iihdvw4m3np2-1-0.jpg

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    Does a 1200W amp run 2x800W subs


    ya youll be fine 800watts is at peak power on the speakers

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    Got a 12"kicker L74ohm sub and sony xm-D9001GTR mono amp


    Hello juan_penaloz,

    The Kicker L7 has an RMS power range of from 50-750 watts and a maximum power handling capability of 1,500 watts so your Sony amp will power it OK. A more powerful monoblock like the Alpine MRP-M1000 or the Kicker 08ZX750.1 would provide even more power and could operate safely at 2ohms.

    You have the voice coils wired properly for the Sony amp. It's OK to have the sub impedance higher, but you definitely do not want it lower than the 4ohms the amp is rated at in bridged mode.

    Hope this helps.

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    Sub cutting out


    Check the 12v wire running from the battery to the amplifier. Also the sony explode is a garbage subwoofer compared to the Alpine.. sony (they say 1200w max but its more like 100w to power the thing) Amp could be going. Is the amplifier hot when running. If there is a burnt smell comming from the amp, its the amplifier

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