Moon and Tune Amp question ?

[srlebonv]

Hi, I have an 04 with the M&T, Im curious, it seems the amp only runs the front door and tweets, leaving the rear on the radio ??? if this is so what is the ohm output for the stock radio? what is the power out put ? would it be in my interest to replace the factory amp and replace it with a true 4 channel amp to run the door speakers? Im lost here guys,

[Wolfman213]

The amp runs all the speakers. IIRC, I believe they are all in 8 ohm. I'm unsure of the output, but AFA going aftermarket, the sky, and your wallet, are the limit. We have mbrs with stock, speaker upgrades, HU upgrates, to full on strip the car down to nothing to run blazin systems. Just either use the search function or simply look in the audio section on the main page and you could start to get some ideas. Also the garage shows peoples setups that didn't document it in other ways.

[scherry2]

moons and tunes are 2 ohms speakers and the amp under the passenger seat runs all 6 speakers.

[srlebonv]

Quote, originally posted by audiovibe »They will work but they might not be the best option. The factory speakers are 2ohm speakers, and in theory going from a 2ohm load to a 4ohm load you will decrease power by 50%. I am not sure what the stock speakers are rated in efficiency but to overcome the power loss and keep the same loudness of the factory system you would need a speaker that is at least 3db louder then stock. but there are some benefits to dropping to a 4ohm speaker over the 2ohm. First you save a little energy as the amp will not be driven as hard, and the amp will not generate as much heat when you crank on it, heat eats power. audiovibeAudio vibe said they are 2 ohm, now im really confused

[scherry2]

correctedmy bad I ment to type a 2 not a 4 for speaker Ohms.

[Wolfman213]

Good lord, I have no idea where I was getting 8 at then lol. At least I was corrected without being made a total shmuck

[scherry2]

i remember it from when I put my sub in way back in 03/04

[Stockintoshockin]

amp runs all 6 speakers in separate channels. I have an 04 and i ditched the M&T and I have a much better sound and its much louder. Made a post here http://forums.genvibe.com/zerothread?id=40514 I had the same problem only i had a pass door lower blown so i replaced with a Alpine woofer and tweeter that are paired but separate so I went back to 4 audio channels that sounds like 6 but the rear speakers were about the quality and volume of game boy speakers so I did the custom box with Infinity kappa 6x9's

[srlebonv]

So has no one kept the factory hu and amp and figured out a good sound combo???

[jscherf92]

There are a few companies that sell 2 ohm replacements but it depends on what you want out of the system. Personally ill be replacing all my door speakers with Kicker DS600s soon with a pair of Kicker Comp 12's in the trunk, with two separate aftermarket amps for the speakers and subs. Not entirely sure what ill do with the stock tweeters, either replace them or run them from the front doors...But i'd recommend replacing at least the amp, accounting for the 2 ohm speakers. Or perhaps just swap in 4 ohm speakers and replace the head unit. That'll give you 17-20 rms which im sure is more than the M&T amp...

[srlebonv]

Is the amp really that useless ? Im playing with the idea of buying a new head unit but I want it to look natural and there arent many double din aftermarket systems that have all the features I desire. what if any consequences are there of swappinf out the stock unit ?Also, if I just replace the amp is there a post on hooking the stock radio to a an aftermarket amp using the m&t amp connections.

[srlebonv]

Okay so I decided on buying a new HU, I saw on a prior post to buy some sort of scoshe thing (hopefully Best buy's install bay will have one). Ive had trouble finding a cd player that is rated at 2ohm, will this affect the factory amplifier? What I mean is, since an amplifier just amplifies the signal coming in will I loose power buy keeping the amp or still see a slight increase in power and is it safe for all electronics involved.

[jscherf92]

alright what the Scosche thing does is control the amount of power going into the stock amp. I taught myself plenty just from reading these forums best buy may or may not know what theyre doing with this because its such a special case. If the Scosche SLC-4 is installed correctly and tuned correctly, the speakers will sound a bit better than stock, the amp will still be just as fine as stock and hopefully you'll have some better sound features in an aftermarket HU. If they dont install the scosche gain controller properly you may hear a hum or buzz in the speakers or it may not get loud enough for you, depends on how they tuned the scosche box...

[jscherf92]

as per your M&T connections question, it has like plastic plug heads, so if you wanted to replace the amp, you would have to rip the wires out of the plastic plugs, determine what wire goes to what, and rewire it to your new amplifer. It may be easier to run new wires...

[srlebonv]

okay, so all is well with the new HU install. the rear speakers seem to get little or no power, I can only assume that is within a gain control in the amplifier. I plan to leave the tweets and the front doors hooked to the amp and run the rears directly off of the radio. I searched for a wiring schematic of the amp, I had no luck anyone know where one can be found ?

[srlebonv]

So Ive determined that there is something between the radio and the amp. I used this diagram (http://crutchfield.custhelp.com/cgi-bin ... X3BhZ2U9MQ**) which is by and large correct, but when joining the input wires directly to the speaker wirse I still get no sound. Any ideas ?

[jscherf92]

not entirely sure what youre doing now, maybe this will help? http://www.modifiedlife.com/20...agram/

[srlebonv]

What Im attempting to do, is run the rear speakers directly off the radio. The amp running the fronts is l perfect however the amp still barely powers the rears.

[Wolfman213]

If the rear speakers getting little to no signal is a symptom AFTER the new HU install, then you need to take it back to Best Buy and have them check things since it worked before and now it doesn't.

[srlebonv]

So it was always that way, I tried new speakers and that didnt cure it, Then I figured it was just a weak radio, still they are faint, given how an amp works, I doubt that th rear channels are simply show, but just incase Id like to run the rear speakers directly off the radio, but no one knows how to do it. The diagrams I have found, ( the one from crutchfiled listed above is the best so far) are close but the rear right plugs are green and blue where the diagrams say red and white. I tried several combos with no luck on getting sound bypassing the amp. Its rather ridiculous, it doesnt make sense If the diagram is correct then I should be able to take the output from the radio and hook it directly to the speaker and get sound, however when I do that I still get no sound, which leads me to believe that there is something between the head unit and the amp.

[jscherf92]

well if you are literally taking the positive and negative wires from the speaker and connecting them to the bare side of the stereo wire harness, there is absolutely no reason you shouldn't be getting sound. the amp wouldnt block sound from the rears if it isnt connected to it.... usually with a wire harness youll have a color for each speaker, like green and then green with a white stripe for instance. and that will be like rear left pos and neg. maybe chat with the crutchfield advisors unless you want to take it to a pro for diagnostics...