Closed Thread
Page 1 of 2 1 2 LastLast
Results 1 to 15 of 22

Reload Thread: sorry guys but i can't search for this

  1. #1
    marauder's Avatar
    marauder is offline Member



    Join Date
    Apr 2003
    Location
    jonesborough, TN
    Age
    38
    Posts
    43
    Post Thanks / Like
    Mentioned
    0 Post(s)

    sorry guys but i can't search for this

    i want an amp (preferably 1 amp) to drive two RFP3212's (400w RMS 800 peak) subs. i would do a search but i get this stupid not enough letters error every time i search so i'm breaking the cardinal rule and asking again.


    long story short
    i've looked at several amps that all advertise 400Wx2 RMS but i just don't trust those values when the amp is only 300-350 bux. am i being paranoid or is amp advertising like every other product. (ex ham radios) when i buy a new ham radio they advertise 200 watts but it really only means 200w peak which is like 130w RMS. i fully understand the RMS/peak theory and am wanting an amp to most efectively push what i've got.


    thanks and sorry for the book.



    James Marauder Holbrook

    quoted from sudden_impulse (pbnation)
    Yes d00d yuo aer teh 1337 Haxor wthi yuor sepllning msitaeks!!




  2. #2
    Randy Savage's Avatar
    Randy Savage is offline CarAudio.com Veteran



    Join Date
    Oct 2002
    Location
    New York
    Age
    30
    Posts
    21,079
    Post Thanks / Like
    Images
    10
    Mentioned
    4 Post(s)

    Re: sorry guys but i can't search for this

    Originally posted by marauder
    i want an amp (preferably 1 amp) to drive two RFP3212's (400w RMS 800 peak) subs. i would do a search but i get this stupid not enough letters error every time i search so i'm breaking the cardinal rule and asking again.


    long story short
    i've looked at several amps that all advertise 400Wx2 RMS but i just don't trust those values when the amp is only 300-350 bux. am i being paranoid or is amp advertising like every other product. (ex ham radios) when i buy a new ham radio they advertise 200 watts but it really only means 200w peak which is like 130w RMS. i fully understand the RMS/peak theory and am wanting an amp to most efectively push what i've got.


    thanks and sorry for the book.
    $300-350 is a lot for a 800 watt amp....

    what amps have you looked at thus far?





  3. #3
    paikiah's Avatar
    paikiah is offline Wangaholic



    Join Date
    Nov 2002
    Location
    Seoul, Korea
    Age
    37
    Posts
    7,770
    Post Thanks / Like
    Images
    46
    Mentioned
    0 Post(s)

    Re: sorry guys but i can't search for this

    Originally posted by marauder
    i want an amp (preferably 1 amp) to drive two RFP3212's (400w RMS 800 peak) subs. i would do a search but i get this stupid not enough letters error every time i search so i'm breaking the cardinal rule and asking again.


    long story short
    i've looked at several amps that all advertise 400Wx2 RMS but i just don't trust those values when the amp is only 300-350 bux. am i being paranoid or is amp advertising like every other product. (ex ham radios) when i buy a new ham radio they advertise 200 watts but it really only means 200w peak which is like 130w RMS. i fully understand the RMS/peak theory and am wanting an amp to most efectively push what i've got.


    thanks and sorry for the book.
    unlike ham radios, car audio amps by respected mftrs are UNDER rated, so if you get something like a JBL 1200w amp, it actually produces 1300w RMS and over.

    You're looking for a 800w@2ohm mono amp. If it were me, I'd look for maybe a 2 channel 200w amp that can drop to 2ohm mono stable. It'll probably give out at least 600w RMS or maybe slightly more. A monoblock D class amp will draw less current, and at 800 watts, I think I'd take class D. So ask for "a monoblock 800w RMS amp, with a max budget of $$$$."

    You can also have a bit more than the power rating of the subs. Rockfords are known to take a bit more than advertised.

    I'd like to help you more, but I don't know the prices of stuff in the US. Oh, excpet JBL's cause I was about to order them.

    The subs might be alright with 300w RMS each, so maybe a JBL 600.1? It drops to 1ohm mono and it would probably put out more than 600watts, so your subs would get at least 325watts. Price is around $200. JBL monoblocks don't have subsonic filters, but it is arguably the most bang for buck.



    Team Caraudio

    Sony C90, 210 EQ
    Seas 27TDF/C, RE XXX 6.5, custom xo (dyn 240GT sitting idle)
    RF 60.2 amp
    eD A15.22
    Soundstream picasso 1400.1D

    Bass drive-by's are uncool.

  4. #4
    fantomas's Avatar
    fantomas is offline show her the oh face



    Join Date
    Apr 2002
    Location
    CT
    Age
    29
    Posts
    980
    Post Thanks / Like
    Mentioned
    0 Post(s)
    meh ...to search for something shorter than 4 letters...use a "*" after the word...like "MTX" would be "MTX*".

    with amps...the thing to look out for is if the manufacturer overrates or underrates the wattage. using mtx as an example again..the thunder81000D puts out a rated 1500wrms at 2 ohms. however, the birthsheet might say something like 1700 wrms. now, a company like pyle, would probably put out less than rated.

    you'll probably want something thats 1 ohm stable...or that can give you 600-800 watts at 4 ohms since those subs are 4ohm dvc.



    when in doubt, check the ground.

    1728

  5. #5
    marauder's Avatar
    marauder is offline Member

    Threadstarter


    Join Date
    Apr 2003
    Location
    jonesborough, TN
    Age
    38
    Posts
    43
    Post Thanks / Like
    Mentioned
    0 Post(s)
    i've really seriously looked at these two amps so far

    http://www.sounddomain.com/sku/CRUV2800

    and

    Power 750S from RF
    the site on the 2nd one was down so i can't get a link to it.



    James Marauder Holbrook

    quoted from sudden_impulse (pbnation)
    Yes d00d yuo aer teh 1337 Haxor wthi yuor sepllning msitaeks!!

  6. #6
    Randy Savage's Avatar
    Randy Savage is offline CarAudio.com Veteran



    Join Date
    Oct 2002
    Location
    New York
    Age
    30
    Posts
    21,079
    Post Thanks / Like
    Images
    10
    Mentioned
    4 Post(s)
    Originally posted by marauder
    i've really seriously looked at these two amps so far

    http://www.sounddomain.com/sku/CRUV2800

    and

    Power 750S from RF
    the site on the 2nd one was down so i can't get a link to it.
    Take a look at the US Acoustics amps at www.thezeb.com - They are great amps that are really low in price.

    also, check out the Soundstream amps on www.etronics.com - these amps are awesome, I love them...





  7. #7
    marauder's Avatar
    marauder is offline Member

    Threadstarter


    Join Date
    Apr 2003
    Location
    jonesborough, TN
    Age
    38
    Posts
    43
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Originally posted by fantomas
    meh ...to search for something shorter than 4 letters...use a "*" after the word...like "MTX" would be "MTX*".

    with amps...the thing to look out for is if the manufacturer overrates or underrates the wattage. using mtx as an example again..the thunder81000D puts out a rated 1500wrms at 2 ohms. however, the birthsheet might say something like 1700 wrms. now, a company like pyle, would probably put out less than rated.

    you'll probably want something thats 1 ohm stable...or that can give you 600-800 watts at 4 ohms since those subs are 4ohm dvc.
    thanks i'll keep that in mind next time i search. yeah i'd like to get something in the 2ohm stable range even tho the subs are 4ohm DVC i can wire them to be 2 ohm each. and if anything i can build a pie T tuner and get whatever impeadeance match i want but that sux to have to do it it eats too much power like that. 2 or 4 ohms is good i'm just afraid that if i order something and it comes in and it's not what i want or can use then i'm screwed royaly.



    James Marauder Holbrook

    quoted from sudden_impulse (pbnation)
    Yes d00d yuo aer teh 1337 Haxor wthi yuor sepllning msitaeks!!

  8. #8
    marauder's Avatar
    marauder is offline Member

    Threadstarter


    Join Date
    Apr 2003
    Location
    jonesborough, TN
    Age
    38
    Posts
    43
    Post Thanks / Like
    Mentioned
    0 Post(s)
    this is pretty much what i'm afraid of.
    http://www.etronics.com/product.asp?...=rocamp4224rtx

    i've read some good things about these amps and that's a really good price but it seems awfully cheap to be able to do what they are advertising it to do.


    man i'm confused. LOL

    thanks for your help guys i'm really kinda new to the whole system thing and really want to feel my music and have it loud too.



    James Marauder Holbrook

    quoted from sudden_impulse (pbnation)
    Yes d00d yuo aer teh 1337 Haxor wthi yuor sepllning msitaeks!!

  9. #9
    Randy Savage's Avatar
    Randy Savage is offline CarAudio.com Veteran



    Join Date
    Oct 2002
    Location
    New York
    Age
    30
    Posts
    21,079
    Post Thanks / Like
    Images
    10
    Mentioned
    4 Post(s)
    Originally posted by marauder
    this is pretty much what i'm afraid of.
    http://www.etronics.com/product.asp?...=rocamp4224rtx

    i've read some good things about these amps and that's a really good price but it seems awfully cheap to be able to do what they are advertising it to do.


    man i'm confused. LOL

    thanks for your help guys i'm really kinda new to the whole system thing and really want to feel my music and have it loud too.
    Well, you should be afraid of Rockwood, lol. They are horrible.

    anyway, like I said, US Acoustics and soundstream make some awesome amps that are affordable.





  10. #10
    marauder's Avatar
    marauder is offline Member

    Threadstarter


    Join Date
    Apr 2003
    Location
    jonesborough, TN
    Age
    38
    Posts
    43
    Post Thanks / Like
    Mentioned
    0 Post(s)
    LOL good at least im in the right direction. ok man i'll look into those and see what i like the best and hopefully pick one up soon.

    thanks for the input guys you rock.



    James Marauder Holbrook

    quoted from sudden_impulse (pbnation)
    Yes d00d yuo aer teh 1337 Haxor wthi yuor sepllning msitaeks!!

  11. #11
    Randy Savage's Avatar
    Randy Savage is offline CarAudio.com Veteran



    Join Date
    Oct 2002
    Location
    New York
    Age
    30
    Posts
    21,079
    Post Thanks / Like
    Images
    10
    Mentioned
    4 Post(s)
    Originally posted by marauder
    LOL good at least im in the right direction. ok man i'll look into those and see what i like the best and hopefully pick one up soon.

    thanks for the input guys you rock.
    Pick out a few that you see and like, and just post them here, we'll tell ya which ones are good and which to stay away from.





  12. #12
    fantomas's Avatar
    fantomas is offline show her the oh face



    Join Date
    Apr 2002
    Location
    CT
    Age
    29
    Posts
    980
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Bridged RMS Power: 600W x 1 @ 2 ohms. im pretty sure thats at 12.9 volts. most cars run at 14.4 volts (while on) so the wattage will be higher. and its 600 x 1 so you would need to get the 1 ohm load (4 x 4ohm dvc in parrallel) to 2 ohms....

    im just curious how you would do that...? i would think that if you would put in another 4 4 ohm resistors (into parrallel to eachother, than series to the subs) you would cut the power in half. is that how you do it?

    and as snova said, if you're ever unsure of something, just ask.

    i dont mind answering the same questions over and over again...



    when in doubt, check the ground.

    1728

  13. #13
    paikiah's Avatar
    paikiah is offline Wangaholic



    Join Date
    Nov 2002
    Location
    Seoul, Korea
    Age
    37
    Posts
    7,770
    Post Thanks / Like
    Images
    46
    Mentioned
    0 Post(s)
    Originally posted by fantomas
    Bridged RMS Power: 600W x 1 @ 2 ohms. im pretty sure thats at 12.9 volts. most cars run at 14.4 volts (while on) so the wattage will be higher. and its 600 x 1 so you would need to get the 1 ohm load (4 x 4ohm dvc in parrallel) to 2 ohms....

    im just curious how you would do that...? i would think that if you would put in another 4 4 ohm resistors (into parrallel to eachother, than series to the subs) you would cut the power in half. is that how you do it?

    and as snova said, if you're ever unsure of something, just ask.

    i dont mind answering the same questions over and over again...
    Isn't the alt 14.4V and in reality, it's only at about 13.8V? during idle, and when the bass hits, it goes down even lower..dimmage, like Gsteg says



    Team Caraudio

    Sony C90, 210 EQ
    Seas 27TDF/C, RE XXX 6.5, custom xo (dyn 240GT sitting idle)
    RF 60.2 amp
    eD A15.22
    Soundstream picasso 1400.1D

    Bass drive-by's are uncool.

  14. #14
    fantomas's Avatar
    fantomas is offline show her the oh face



    Join Date
    Apr 2002
    Location
    CT
    Age
    29
    Posts
    980
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Originally posted by paikiah
    Isn't the alt 14.4V and in reality, it's only at about 13.8V? during idle, and when the bass hits, it goes down even lower..dimmage, like Gsteg says
    i suppose..lol. 13.8 is still higher than 12.8. and the higher the rpm, the higher the voltage...up to 14.4 i guess.



    when in doubt, check the ground.

    1728

  15. #15
    marauder's Avatar
    marauder is offline Member

    Threadstarter


    Join Date
    Apr 2003
    Location
    jonesborough, TN
    Age
    38
    Posts
    43
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Originally posted by fantomas
    Bridged RMS Power: 600W x 1 @ 2 ohms. im pretty sure thats at 12.9 volts. most cars run at 14.4 volts (while on) so the wattage will be higher. and its 600 x 1 so you would need to get the 1 ohm load (4 x 4ohm dvc in parrallel) to 2 ohms....

    im just curious how you would do that...? i would think that if you would put in another 4 4 ohm resistors (into parrallel to eachother, than series to the subs) you would cut the power in half. is that how you do it?

    and as snova said, if you're ever unsure of something, just ask.

    i dont mind answering the same questions over and over again...

    here's a question i have for ya.
    if i have an amp that says ohh lets say 600 watts. it only has a 20a fuse. to me this is a little hard to believe because when you do the math even at 13.8 v it's no where near that. (13.8v X 20a = 276w RMS) now lets turn RMS into PEP (peak) power. 276 X 1.404 = 387.5w far below the advertised 600w. now this is how i would do it is there something special about stereo amps that i don't know about or is this just fishy.



    James Marauder Holbrook

    quoted from sudden_impulse (pbnation)
    Yes d00d yuo aer teh 1337 Haxor wthi yuor sepllning msitaeks!!

Closed Thread
Page 1 of 2 1 2 LastLast

Posting Permissions

  • You may not post new threads
  • You may post replies
  • You may post attachments
  • You may edit your posts

1e2 Forum