#1490508 - 13/09/08 10:25 AM
Pioneer GM-D7400M question
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gmac22
SD Ralph Wiggum
Registered: 13/09/08
Posts: 31
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anyone have this amp?
i have a brand new alpine type R 12" thats rated 500rms... running the dvc 4ohm sub at 2ohms i was hoping this little amp can do it. 400rms is plenty, but is that real world? i only ask because pioneer claims the amp uses 2/3 less power then similar rated amps.
think ill be ok? im making my box today, this crap has gotta fit in a extended cab ranger! ill make it fit dammit! 
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#1490626 - 13/09/08 08:00 PM
Re: Pioneer GM-D7400M question
[Re: Rodek]
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gmac22
SD Ralph Wiggum
Registered: 13/09/08
Posts: 31
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this one is small footprint too, they seem similar in size. i have not bought anything that has the sony name on it in over 15 years. i cant stand sony of the early 90s+. but to answer your question, yes the amp is being shipped, yet i dont mind returning this if there is one better for the $150 i paid shipped... (2 year warranty incld)
i was really just wondering is this amp will utilize an alpine type r 12" sub to a fair extent. i would rather have an amp that is more powerful then the sub can handle, but in this case i will settle for something that pushes the sub most of the way...
Edited by gmac22 (13/09/08 08:05 PM)
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#1490726 - 14/09/08 10:00 AM
Re: Pioneer GM-D7400M question
[Re: Rodek]
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gmac22
SD Ralph Wiggum
Registered: 13/09/08
Posts: 31
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thanks for the reply
after doing some more research, im finding that this sub is severely underrated. people are actually running 1200w rms to this thing all day long... and im not surprised, ive had a kicker 15" L7 before and to be honest this typre r rub is similarly beefy.
i guess ill try this pioneer for ahwhile, itll work good to break in the sub.. but i have a feeling ill want something at least twice as powerful eventually... especially with my 1cuft at best sealed box i made
Edited by gmac22 (14/09/08 10:01 AM)
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#1495497 - 21/09/08 07:35 AM
Re: Pioneer GM-D7400M question
[Re: ]
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gmac22
SD Ralph Wiggum
Registered: 13/09/08
Posts: 31
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yeah it seemed high to me too. and not cause i was high. amps still havent come- techronics.com had an error on their ordering page, they did fix it and gave me a $60 discount on a better amp then i first ordered. i do wish the shipping was a lot faster though, its going on 3 weeks since they took my money. other then that the store seems really good as far as customer service goes. they put a 2-year store warranty on most of their stuff too. they seem to be a sister company of sonicelectronix.
so whenever i get my stuff ill post back on what i think of this combo. right now im running new wires, 12awg for the 5x7's and 10awg for the sub... overkill and futureproof...
Edited by gmac22 (21/09/08 07:37 AM)
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#1499946 - 27/09/08 06:55 PM
Re: Pioneer GM-D7400M question
[Re: gmac22]
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gmac22
SD Ralph Wiggum
Registered: 13/09/08
Posts: 31
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everything is in a working good now. had noise problems, the pioneer rca fuse is blown. grounding the -neg on the rca's works excellent to take out noise.
it pounds. really a tad better then i thought it would for a 400w amp. the sub cant take much more, although its hard to tell if i have the amp clipping... at full volume i start smelling my speaker box (the smell it made when i was making it. woody and gluey). i cant really decide if this is actually the box getting hot or the sub overheating. reason being is the back of the magnet is less then a half inch from a wood corner. the amps arent too hot, the sub cone is warm in the middle but i dont think its hurting...
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#1500192 - 28/09/08 11:15 AM
Re: Pioneer GM-D7400M question
[Re: Rodek]
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gmac22
SD Ralph Wiggum
Registered: 13/09/08
Posts: 31
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sounds good. ive also come to the conclusion that my front tweeters are blown (coaxial hifonics 5x7's). i think this has something to do with the poor ground that was on the radio and me not being able to keep my hands off the gains. also, this kenwood 4ch amp is really too strong for these 60w rms rated hifonic speakers.
speaker boxes were left outside, so no package to return the blown speakers in. im pretty sure its my fault anyway, so ill just eat the $50 they cost. i have a pair of polk momo's coming to go in the front to replace these... im sure itll be much better anyway.
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#1501750 - 30/09/08 05:43 PM
Re: Pioneer GM-D7400M question
[Re: Rodek]
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gmac22
SD Ralph Wiggum
Registered: 13/09/08
Posts: 31
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my deck checks the frequency off at 120hz as it is now... yet it does seem better when i let the amp do it. anything i can do to replace those tweets? wouldnt mind using the speakers somewhere, like my garage.
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#1501753 - 30/09/08 05:58 PM
Re: Pioneer GM-D7400M question
[Re: Rodek]
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gmac22
SD Ralph Wiggum
Registered: 13/09/08
Posts: 31
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i was thinking more along the lines of hacking out the tweets from an older set of pioneer 5x7's i have and hot gluing those buggers onto the hifonics. probably not a very strong tweeter, but better then a blown one...
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#1504209 - 04/10/08 06:08 AM
Re: Pioneer GM-D7400M question
[Re: Rodek]
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gmac22
SD Ralph Wiggum
Registered: 13/09/08
Posts: 31
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got my momos in. not installed yet, but physically they make the hifonics look like toys. i didnt realize these are basically components... they come with an external crossover and the tweeter is large for a coaxial design.
and to resolve my original question to this thread- i think if anyone is debating on this amp, it KICKS ASS, but in my case i think this type R 12" alpine could handle its big brother, the d8400gm. (600wrms@2ohm). i do want to note though, even with the gains maxed out and this amp certainly clipping the sub at least a little, the amp just doesnt get hot. its really an outstanding piece of hardware for $140.
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#1504272 - 04/10/08 10:14 AM
Re: Pioneer GM-D7400M question
[Re: MA585]
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gmac22
SD Ralph Wiggum
Registered: 13/09/08
Posts: 31
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haha no no... i didnt mean that. it was late, sorry. i ment the gains are as high as they should be, which for my 2v preout hu that is a bit under 3/4 of the way to full on the dial. i think they are still set a hair too hot, but i like it that way because it allows me to tweak at the hu. i still think it clips though at the volumes i want, im just saying that from my years of fiddling with this stuff. some songs have ghetto bass that just booms, and other songs have good kick (like slipknot) but when you combine them (most heavy metal) it just seems to wash out a little more then it should. and i havent even heard any sort of hint that the sub is over-extending, nothing even close to that. just get a hint of that funny burnt smell if i go too high.
mind you, i never said i know what im really doing. the only thing i really do know is i tend to crank things too high and overddrive everything- i know this, i did it when i was a teenager. i still do it now. i dont want people to follow my lead, believe me! its the rock n roll in me.. i cant help it.
the momo's sound outstanding. i can conclude the $50 for each pair of hifonics was a total waste of money. i would say, scientifically, these momo's are about ten thousand times brighter and cleaner then the hifonics. thats really not an exaggeration... i went with polk based on reviews saying they are a good choice for metal music. for sure they are!
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