Question about MTX Thunder 1501D Car Audio Amplifier

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1 ohm stable?

Does anyone know if the 1501d is one ohm stable? i know the newer one is but im not sure about the older model

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That one is 2ohm stable.

Posted on May 16, 2009

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YES IT IS i have the same amp and i have it to 1 ohm its powering to kicker l7's which are 2ohm subs down to 1 ohm stability

Posted on May 16, 2009

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Wow sirrex43 please state the obvious for us all! who asked if the amp was 2 ohm stable?..........knowone ! the guy wants to know if he can push 1 ohm , geeeeez anyway mtx is known for bein underated ....im sure u know already if u own this bad boy and i was also concerned cuz i have one myself.....i push 6 15'' at 1.33 ohms i think thats good enough

Posted on May 17, 2010

  • Mrmitchass Aug 25, 2010

    Now, I just got off of the phone with MTX techs, and was told that putting a 1Ohm load on this amp, causes serious damage to it.. But it will work great at 2 ohms.. And 14.5V power at all times.. That is how it will work to it's best potential..

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I need to know what ohm level my 1501 d class mtx thunde is?


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Dec 19, 2010 | MTX Thunder 1501D Car Audio Amplifier

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1501d,, What subs should i use/


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Oct 11, 2009 | MTX Thunder 1501D Car Audio Amplifier

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Ran it at 1@ now it has low power


Hello if your amp is the one above in the picture, MTX-1501D then your amp is not 1 ohm stable. Your amp is rated at 500 watts x 1 at 4 ohms and 1000 watts x 1 at 2 ohms. The amp has a safety circuit that if it senses to low of a load, ohms, it will only put out half it's power to protect the amp from shorting out. Read the manual. You can download it at retrevo.com or just google it and a manual download site will be in the search list. Hope this hels, Good luck.

Aug 21, 2009 | MTX Thunder 1501D Car Audio Amplifier

1 Answer

Lookin for specs


the 1501d is a one channel amp! But has two terminals for that same channel. that amp is stable to produce say 700 watts into 4ohms but also stable to produce 1500 watts into 2ohms.If you were to have two 4ohm speaks it would be easier to have a terminal for each speaker.good amp btw but be careful with their fragile preamp inputs

Nov 20, 2008 | MTX Thunder 1501D Car Audio Amplifier

2 Answers

Mtx 1501d


There are a lot of problems that can cause the amp to apply DC to the speaker terminals.

Before we go any farther, you should know that this amp stores enough energy to kill. When power is applied, the transistors must be clamped to the sink. After removing power, you MUST wait for ALL LEDs to go COMPLETELY out.

You need to CAREFULLY measure the DC voltage from leg 1 to leg 3 of all of the output transistors (the ones you changed). Post a list of the voltages and circuit board designation (FETxyz) for any that read more than 1v.

Do NOT let the probes short to other pins or to the heatsink when measuring the voltage.

Remember... High voltage and lots of stored energy. Be careful.

Apr 17, 2008 | MTX Thunder 1501D Car Audio Amplifier

1 Answer

Mta 1501d


You need to switch your meter to ohms and measure the resistance across them. You should read something near 4.75 ohms.

4.75 ohms would cause a constant tone on diode check or continuity.

Did you replace all 8 output transistors?

If not, are you sure that the other 4 transistors haven't failed?

Apr 16, 2008 | MTX Thunder 1501D Car Audio Amplifier

1 Answer

Blown 1501d


R435 is 39.2 ohms. If R436 is the other gate resistor, it's also 39.2 ohms.

Oct 18, 2007 | MTX Thunder 1501D Car Audio Amplifier

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