alpine mrp-m350 enough for...
 

Is it enough power to run an alpine type r 12?

or 2 12" type s'

RE: alpine mrp-m350 enough for...
 

barely. just remember to not crank the gains to compensate for low power.

RE: alpine mrp-m350 enough for...
 

what would be a good solid amp to power the alpine type r or two alpine type s'
giving them enough power

RE: alpine mrp-m350 enough for...
 

zx750.1 would work with either one type R 12 or two Type S

RE: alpine mrp-m350 enough for...
 

A person from crutchfield tol me that the alpine mrp-m450 would be great to run a type r so i think thats what im going to with

RE: alpine mrp-m350 enough for...
 

pdx 1.1000

RE: alpine mrp-m350 enough for...
 

well now thats 450rms to a 500 rms sub.

does 50 watts make a big difference? probably not. but that type r can handle way more than that.

I would take the single R over 2 type s 12's.

I would go with what hillbilly recommended and try to find a zx 750.1. Probably cheaper and more power.

RE: alpine mrp-m350 enough for...
 

yes, under-powering a speaker is usually just as bad as over-powering it. People will turn the gain and bass boost up more to get it louder, leading to speaker failure.

RE: alpine mrp-m350 enough for...
 

my zx750.1 was $180 USD shipped. idk about that alpine

RE: alpine mrp-m350 enough for...
 

I thought over powering a sub is fine as long as distortion is left outta the picture.

distortion kills subs, not too little, or too much power.

RE: alpine mrp-m350 enough for...
 

was that a refurb.?

that is cheap, alpines amps are nice, but seem pretty expensive when compared to others.

dont get me wrong, I love my 501, but I payed almost $1 per watt retail. worth it? maybe.....if you really like fine tuning your system, the digi's were great.

RE: alpine mrp-m350 enough for...
 

no it was new. i added all of the ebay auctionsthat werent "buy it now" to my watch list and watched and watched...

RE: alpine mrp-m350 enough for...
 

Actually those amps are pretty underrated and actually pump out a good 1200RMS @ 2 or 4 ohms

RE: alpine mrp-m350 enough for...
 

I was talking about the mrp-m450.

and actually, its only rated for 400rms at 2 ohms.

and i wouldnt call an extra 200 watts pretty over rated. ;)

my sundown will do over 2200rms at .35 ohms.....thats pretty underrated my friend.

RE: alpine mrp-m350 enough for...
 

I think misunderstand the use of the term. I doubt your sundown amp was ever rated for anything at .35ohms. "rated" means that the company that makes the amp will do a certain power output at a certain impedence but is documented to actually put out more or less at that same impedence. In this case, at 2 or 4 ohms, the pdx 1.1000 is rated to pump out 1000RMS but in reality does about 1250RMS at 2 or 4 ohms (depending on the actual testing documented on the birth sheet). I highly doubt your sundown amp came with a birsheet that said "actual wattage - 2200RMS @ .35omhs".

RE: alpine mrp-m350 enough for...
 

*copy and pasted from Jacobs board*[/align][/align]results from the sundowns...

Test Vehicle.. mine.. 05 aveo..

RMS clamp and dmm, as seen in the 12" test session..

This testing includes recent results, and not so recent..

woofers used.. 2 Mags (1.9 dcr per coil), 2 FI Q 12's (1.4 dcr per coil)

either used 1 sub or both of the pair for loads..

pure 60hz sine was used to tested.. just under audible clipping

1 amp, single 1000ca everstart maxx, factory alt

4 ohm nominal = 518 watts @ 88% efficiency (voltage fell from 14.3v, to 14.0v)
2 ohm nominal = 948 watts @ 85% efficiency (voltage fell from 14.3v, to 13.6v)
1 ohm nominal = 1510 watts @ 78% efficiency (voltage fell from 14.3v, to 12.4 volts
.5 ohm nominal = 1615 watts @ 72% efficiency (voltage fell from 14.3v, to 11.8v)
.35 ohm nominal = 1748 watts @ 67% efficiency (voltage fell from 14.3v, to 11.4v)

amplifier was protection happy @ .35 with tones, and some music.

IMO.. one 1500d should be limited to 1 ohm nominal use in factory electrical systems.. for the sake of the car.. not the amp

now... to have fun with some juice..

1 amp, single 1000ca everstart maxx, 1 Eagle Picher 12a5000, factory alt

4 ohm nominal = 520 watts @ 88% efficiency (voltage fell from 14.3v, to 14.1v)
2 ohm nominal = 960 watts @ 84% efficiency (voltage fell from 14.3v, to 13.7v)
1 ohm nominal = 1635 watts @ 75% efficiency (voltage fell from 14.3v, to 12.8 volts
.5 ohm nominal = 1890 watts @ 71% efficiency (voltage fell from 14.3v, to 12.8v)
.35 ohm nominal = 2245 watts @ 65% efficiency (voltage fell from 14.3v, to 12.8v)

amplifier did fine @ .35 with tones and music with the added battery

2 amps strapped, with both batteries (for the sake of not typing it over and over... voltage drops from 14.3v, to 12.8 the entire test... lol

4 ohm strapped = 1900 watts @ 82% efficiency
2 ohm strapped = 3150 watts @ 72% efficiency
1 ohm strapped = 3740 watts @ 68% efficiency
.5 ohm strapped = 4425 watts @ 65% efficiency
.35 ohm strapped = 5415 watts @ 62% efficiency

amps would only tolerate a VERY short burp @ .35.. [/align]

--------------------

- Jacob Fuller
- Owner, Sundown Audio
- Associate, Stereo Integrity
[/align]not in the manual, or on the birth sheet. but this testing is from the man him self in a real world situation, just the way it should be imo.[/align][/align]5400 watts from a pair of 1500 watt amps aint too shabby imo[/align]

RE: alpine mrp-m350 enough for...
 

i kinda thought underrated (in pretty much any context) meant: better than they say.

in the world of amps and woofers i take it to mean: more power than they say




idk :eek:

RE: alpine mrp-m350 enough for...
 

I guess you could look at it that way.....

But some companies over rate by 50 watts, others by.....alot more.

there are lots of variables when testing amps.

RE: alpine mrp-m350 enough for...
 

So is the mrp-m450 enough?

cause theres one on ebay but it doesnt include a manual, 2 end caps, and hi-level input harness

what are all those...besides the manual

and can i get them easily for cheap?

if the amp is good enough then thats great.

im not looking to completely fine tune it as this is my first car and i plan to purchase a different one later on and then put all my time and effort into it

now im looking for something that will get the job done

and if its the 450 and the type r GREAT

RE: alpine mrp-m350 enough for...
 

they will work fine together. make sure you wire that amp at a 2 ohm load.

RE: alpine mrp-m350 enough for...
 

you are correct


you mean under-rate? the companies that overrate are those like audibahn and lightning audio. Good companies such as alpine and focal design the amp and give the power rating. That is what shows up on the manual. Before each amp is shipped, they are tested in a test bed with a load and measured for their actual contiuous power. That is what appears on the birth sheet. All testing is done the same. the thing that most likely underrates good companies amps is the fact that they use quality components while constructing their amps which allow better power flow and output.

Will it work, yes. Optimally - no. Its a great place to start and it allows you to easily upgrade later. Just dont expect more than you should. As someone mentioned earlier, the gain is not a volume knob so dont try to compensate for a possible lack of volume. If you want more output, try designing a better enclosure.

the hi-level input harness is an optional line level converter built into the amp. If you dont plan on using RCAs to receive the signal, you must use the hi-level harness. If you plan on using RCAs, dont worry about it. The end caps are trim pieces to make the amp look prettier. Not necessary but helpfull. Not sure where you would buy them seperately.

RE: alpine mrp-m350 enough for...
 

ummm, depends what voltage they're tested at too.......most are tested at 14.4.....some much lower.

my sundown is rated 1500@12.8volts

all testing is not done the same. thats why they implemented the cea style.

RE: alpine mrp-m350 enough for...
 

true. it is always specified on the birth sheet though. Oh, soemthing else I forgot to mention blazinloud, the specs you posted earlier you obtained from another site - those are not the rated numbers. Just because that is what that particular person tested the amp in his possession at, doesnt mean yours will produce the same numbers. Each amp is different. I still highly doubt that the comp[any who makes that amp publicly stated that the amp will handle a short burp producing .35 ohm nominal = 2245 watts. You see what im trying to say?

RE: alpine mrp-m350 enough for...
 

I ended up getting a brand new amp.....and it did not come with a birth sheet.

that is the man who designed, and built it, what other confirmation do you need?

the results would still be very very close.

and how would bench testing it be anymore accurate? thats as far from a real world situation then anything......do they compensate for box rise? dcr per coil, etc.

the 3000d did 3200@1.33ohm@10.75volts. that was in house testing done at sundown audio done by the owner himself.

and that was an ACTUAL ohm load.

imo, sundown took an extra 3 steps when rating their amps.

not to mention the 1500d can be ran all the way up to 17 or 18 volts, which also, is not in their ratings.