Question about MTX Thunder 2-Channel Amplifier 502 Car Audio Amplifier

MTX 502 bridged into 2 ohm load. Power system up seems a little weaker than normal. Unhook left rca wire...no change in output. Plug left rca back in unhook right.. silence turn gains up no help... replaced rca wires...no help. Looked carefully over circut board for anything unuasual with no results. Also the left rca output is dead. Assumeing this is a simple problem early in the amplifieing process. Any help with maybe a scematics diagram??

Re: MTX 502 2 chanel amp Pre amp problem?

Unless your amp is 1 (one) ohm stable then you may have fried it. When you attach a 2 ohm load across a bridged amp then you have effectivly placed each output channel on a 1 ohm load. Not a good thing in most cases. Try hooking up ONE speaker on one channel and one input to that one channel one at a time. Then switch the speaker/input to the other channel and see if you can get either or both channels to work independently. Needless to say you must turn the amp off before you make ANY change in the wiring.

Posted on Jun 25, 2007

From the specs this amp can only handle 4ohms when bridged but can handle 2ohms when it's not bridged

**Specifications**

- Continuous Power (20Hz-20kHz, 0.04% THD)
- 2 ch: (4 Ohm) 100Wx2
- 2 ch: (2 Ohm) 200Wx2
- 1 ch: (4 Ohm) 400Wx1

- Maximum Power (EIAJ)
- 2 ch: (4 Ohm) 250Wx2
- 1 ch: (4 Ohm) 750Wx1

- Frequency Response: 10Hz - 50kHz (0,-1dB)
- Total Harmonic Distortion: <0.01% (1kHz, 4 Ohm)
- Signal-to-Noise Ratio: >105dB (IHF-A Weighted, at 1kHz)
- Dimensions: 10-3/8" x 2-1/2" x 13-5/8"

Nov 08, 2010 | Pioneer PRS-X720 Car Audio Amplifier

If your amp can drive a 2 ohm load then you need to configure your speakers for such a load

1 DVC 12 inch sub with 4 ohm coils wired in parallel would give you two ohm.

series impedance you add the impedance together

parallel it is this formula (Z1^-1+Z2^-1)^-1

the negative 1 exponent is just the inverse so Z1^-1 is just 1/Z1 Figure out your combination for your speaker setup.

1 DVC 12 inch sub with 4 ohm coils wired in parallel would give you two ohm.

series impedance you add the impedance together

parallel it is this formula (Z1^-1+Z2^-1)^-1

the negative 1 exponent is just the inverse so Z1^-1 is just 1/Z1 Figure out your combination for your speaker setup.

Dec 26, 2009 | MTX Thunder 4-Channel Amplifier 6304 Car...

Hello munchisfun,

I'd suspect that the amp is operating into too low of an impedance and going into protection.

The 2200/2 is not rated to drive a 2ohm load when bridged (most 2-channel amps aren't) and when you connect 2 4ohm subs in parallel, the load is 2ohms. I'd run one sub from each channel.

Hope this helps.

I'd suspect that the amp is operating into too low of an impedance and going into protection.

The 2200/2 is not rated to drive a 2ohm load when bridged (most 2-channel amps aren't) and when you connect 2 4ohm subs in parallel, the load is 2ohms. I'd run one sub from each channel.

Hope this helps.

Jul 26, 2009 | Power Acoustik BAMF2200/2 Car Amp

The 2 ohm stable rating on the amp is PER channel meaning that you could effectively hook up a 2 ohm speaker or a 2 ohm load to each channel without the amp getting f"d up-butin bridged mode it will only be 4 ohm stable. to achieve a 4 ohm load with your sub the type x wire the coils in series that will get you at 4 ohms to run in bridged mono .But you will get the **exact **same amount of power if you wire each coil to one channel of the amp as bridged mono sees the sum of your 2 ohm channels combined-Hope that helps.

Jun 08, 2009 | Lanzar VIBE266 Car Audio Amplifier

Hello aj_vidal22,

Here's the link to MTX's sub page where you can view or download the information you need to properly wire the subs to your amp.

http://www.mtx.com/caraudio/products/manualsQuickInstall/subs.cfm

For maximum power, you'll need to wire the subs so that they present a 2 ohm load to the sub outputs on your amp. That will give you the full 420 watts RMS the amp is rated for. Likewise, you,ll want the run the front 4-channels at 2 ohms. Run separately, they produce 85 Watts times 4 channels, or if bridged, 130 watts times 2-channels. But if you run fronts at 4 ohms, they only produce 70 watts times 4 channels and your sub output at 4 ohms drops to 210 watts.

Hope this helps.

Here's the link to MTX's sub page where you can view or download the information you need to properly wire the subs to your amp.

http://www.mtx.com/caraudio/products/manualsQuickInstall/subs.cfm

For maximum power, you'll need to wire the subs so that they present a 2 ohm load to the sub outputs on your amp. That will give you the full 420 watts RMS the amp is rated for. Likewise, you,ll want the run the front 4-channels at 2 ohms. Run separately, they produce 85 Watts times 4 channels, or if bridged, 130 watts times 2-channels. But if you run fronts at 4 ohms, they only produce 70 watts times 4 channels and your sub output at 4 ohms drops to 210 watts.

Hope this helps.

Apr 17, 2009 | Kicker 06ZX750.1 Car Audio Amplifier

when bridgeing an amplifier it always sees half of whatever load you have on it, so if you have a 4ohm speaker when it is bridged the amp will see 2ohms, so yes you can bridge the 4 ohm speaker

Mar 05, 2009 | Bazooka ELA500.1 Car Audio Amplifier

A 2 ohm stable amp should be able to be bridged to 1 ohm (consult owner's manual for bridgability), but a 4 ohm speaker is a 4 ohm speaker and would need to be parallelled with another 4 ohm speaker to provide a 2 ohm load.

Mar 05, 2009 | Car Amplifiers

I looked up that amp, it doesn't have a listing for 2ohms x1 but it has 2 ohms x 2 and its at 250watts. For this situation, I would recommend a different amp or different subs. Right now you are getting the most you can get out of your sub/amp combo, if you only have single voice coil subs. Which is common in the mtx preloaded boxes. Either you want an mono block amp stable at 2 ohms or 2 dual 4 ohm voice coil subs. If you got the subs you would wire the voice coils in series so you could get 8 ohms then the subs in parallel so you could get 4 ohms, which would be the best for that particular amp. Good luck.

-Andrew Hawkins

-Andrew Hawkins

Aug 23, 2008 | Legend LA1490 - American Legacy Series 2 -...

I havthe same amp. Try moving youry ground t a different location. that seemed to help me when i was brigging mine.

May 08, 2007 | Power Acoustik Area 820x2 Car Audio...

ASSUMING that the amp is OK with a 2ohm load then you "set it up" by the configuration of the speakers you use. Two 4 ohm speakers if parallel will give you a 2 ohm load. However, if you are bridging the ouputs then a single 4 ohm speaker bridged between the two outputs will put a 2 ohm load on each channel. Be very careful if you are bridging the outputs that you know what you are doing. On average, when bridged wrong (too much load) the amp will last about one month before it fries. Get some help if you are bridging. Be sure not sorry.

Jan 14, 2007 | MTX Thunder 801D Car Audio Amplifier

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MTX Powers On And Plays For A Bit Then Powers Off Then Sometime Power Right Back On Or Sometime it takes awhile to power back up and is not hot and never gets hot But power is right from battery and ground to frame I Need Help Ple

MTX Powers On And Plays For A Bit Then Powers Off Then Sometime Power Right Back On Or Sometime it takes awhile to power back up and is not hot and never gets hot But power is right from battery and ground to frame I Need Help Ple

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