Question about MTX Thunder 1501D Car Audio Amplifier

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What is all of the part no. to the transistor in the mtx 1501d amplifier

Got some fried cant tell what they are

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Stuart Bassett

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diyAudio

Posted on Feb 20, 2015

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1501d,, What subs should i use/

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Just try to mach the specs as close as possible. Make sure to look at the recommendations of the subs for the size of the box and the port volume.
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Even if there is no visible damage, it could be that one of the transistors is blown, Use a multimeter to check the resistance of the transistors.
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Remove cover and set in direct sunny window for long time, may be no problem with it, Took a month to dry one of my amps out enough that it decided it would come back to life, cell phone dropped in sink took 2 weeks, If you try power to it too soon --fried--, good luck finding diagram and repairing it sincerely-hope its okay, good amp, bad luck,
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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
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if your power light is on then check your preamps (sub out from head-unit).Maybe you need to turn on that output thru head unit's audio menu.Also when using dual voice coils if you wire them out of phase there will be no output
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ARE U USING THE CONTROLS THAT CAME WITH THE AMP?
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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.
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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?
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Hi i have a mtx 1501 d

If it does it with no RCAs plugged in, the speakers or wiring need to be checked.

If the speakers and wiring are OK, the amp may have shorted output transistors.
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