4" speakers to use?

kosmider12
kosmider12 Posts: 4
edited May 2005 in Car Audio & Electronics
hi everyone i've just discovered this board and it seems great.
i just bought an mr2 and want to upgrade the sound. so far i bought an alphasonic 5 channel amp (pmz12005a) a 8" polkmomo sub. i was planning on getting the mmc650's for the front door. in the rear i have 4" speakers and the problem is that polk doesnt make anything to fit in there. i was thinking about the infinity kappas42.5i. any suggestions of what 4" speak would go good with my set up?? thanks for the help
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  • exalted512
    exalted512 Posts: 10,735
    edited May 2005
    dont buy rear speakers, then with the money you saved buy the momo or db components instead of the coaxials
    -Cody
    Music is like candy, you have to get rid of the rappers to enjoy it
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  • MacLeod
    MacLeod Posts: 14,358
    edited May 2005
    Agreed. With a car that small rear speakers are pretty much pointless.

    Instead, like Cody said, use that money to invest in a set of MMC6500 components and use your front amp channels to power the tweeters and the rear amp channels to power the mids. I think youll be much happier with the sound.
    polkaudio sound quality competitor since 2005
    MECA SQ Rookie of the Year 06 ~ MECA State Champ 06,07,08,11 ~ MECA World Finals 2nd place 06,07,08,09
    08 Car Audio Nationals 1st ~ 07 N Georgia Nationals 1st ~ 06 Carl Casper Nationals 1st ~ USACi 05 Southeast AutumnFest 1st

    polkaudio SR6500 --- polkaudio MM1040 x2 -- Pioneer P99 -- Rockford Fosgate P1000X5D
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  • audiobliss
    audiobliss Posts: 12,518
    edited May 2005
    Most definitely you should go with just front speakers. I have a 2-door Jeep and Mac has a four-door Dodge Ram, and we're both running just front speakers and couldn't be happier. Oh, wait a mintue.....oh, right, and Cody has a Silverado with just front speakers, too. (Almost forgot him....:D). Your car is MUCH smaller than any of these, so you should be silly happy with just front speakers. Hmm...silly happy.....as I say that......I can just feel my mind letting go of reality...and slipping away....away..........:D :D
    George Grand wrote: »
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  • AustinKP
    AustinKP Posts: 861
    edited May 2005
    I just sold my rears to a friend because I never used them. I like it much better with just the fronts. Clearer and more detailed.
    http://www.silverdragon.com/punkie/cybertusk/net.idiot.html - Read it, know it

    Alpine 9815
    Polk MM6's in custom fiberglass door pods
    Ascendant Audio Atlas 12
    HiFonics Zeus ZX6400 - 85x2 + 350x1
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  • kosmider12
    kosmider12 Posts: 4
    edited May 2005
    thanks for the great ideas. i was not aware you could power the tweeter and the mid seperatly.
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  • AustinKP
    AustinKP Posts: 861
    edited May 2005
    Originally posted by kosmider12
    thanks for the great ideas. i was not aware you could power the tweeter and the mid seperatly.
    As long as your amp is capable of crossing them over correctly, it can actually sound better.
    http://www.silverdragon.com/punkie/cybertusk/net.idiot.html - Read it, know it

    Alpine 9815
    Polk MM6's in custom fiberglass door pods
    Ascendant Audio Atlas 12
    HiFonics Zeus ZX6400 - 85x2 + 350x1
    2 Gallons SecondSkin Spectrum V.2
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  • AustinKP
    AustinKP Posts: 861
    edited May 2005
    Originally posted by kosmider12
    thanks for the info. how do i know if it will work with the alphasonic amp? i know the 1,2 cahnnel and the 3,4 have seperate controls like gain and the 5th is also seperate.
    What are the specs on your amp? Does your HU have a built-in crossover? You'll want to high-pass your tweets arount 2.5KHz, then bandpass your mids between ~80hz and 2.5KHz, then low-pass your sub at 80ish and below. For the bandpass, if your amp doesn't do it, you can high-pass them on the HU at 80 and low-pass them on the amp at 2.5, or vice-versa.

    -Austin
    http://www.silverdragon.com/punkie/cybertusk/net.idiot.html - Read it, know it

    Alpine 9815
    Polk MM6's in custom fiberglass door pods
    Ascendant Audio Atlas 12
    HiFonics Zeus ZX6400 - 85x2 + 350x1
    2 Gallons SecondSkin Spectrum V.2
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  • MacLeod
    MacLeod Posts: 14,358
    edited May 2005
    If you use the MMC6500 you dont need to worry about it cause the x-over is bi-ampable and has dual inputs.

    Even if it didnt, you run the tweeter off the crossover and then run the mid from 80 Hz and up. A mid will have a natural roll off not much higher than its crossover point.
    polkaudio sound quality competitor since 2005
    MECA SQ Rookie of the Year 06 ~ MECA State Champ 06,07,08,11 ~ MECA World Finals 2nd place 06,07,08,09
    08 Car Audio Nationals 1st ~ 07 N Georgia Nationals 1st ~ 06 Carl Casper Nationals 1st ~ USACi 05 Southeast AutumnFest 1st

    polkaudio SR6500 --- polkaudio MM1040 x2 -- Pioneer P99 -- Rockford Fosgate P1000X5D
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  • kosmider12
    kosmider12 Posts: 4
    edited May 2005
    awesome ive read 2 books on car electronics and still have so much to learn. thanks so much
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  • neomagus00
    neomagus00 Posts: 3,899
    edited May 2005
    i'll contest the 'natural rolloff' part of the midrange response... with the 'midrange extension' switch activated on my mm6s (i.e. the lowpass is off), there is a very definite increase in treble, enough to make me thankful for the crossover.

    maybe it'd work in a system tuned specifically to include this, but...
    It's not good, very fundamentally simply not good. - geolemon

    "Its not good enough until we have real-time fearmongering. I want my fear mongered as it happens." - Shizelbs
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  • MacLeod
    MacLeod Posts: 14,358
    edited May 2005
    Youre right about the MM6. They do tend to roll off higher than they can handle well. However I have mine running from 80 Hz up and they sound great. Although I had to do a little tweaking by turning the treble on my h/u down and my tweeter gain up but it sounds fine.

    I had my MMC690's mid running from 80 Hz and up also and it worked great. That again is the beauty of bi-amping. So much more flexibility in tuning.
    polkaudio sound quality competitor since 2005
    MECA SQ Rookie of the Year 06 ~ MECA State Champ 06,07,08,11 ~ MECA World Finals 2nd place 06,07,08,09
    08 Car Audio Nationals 1st ~ 07 N Georgia Nationals 1st ~ 06 Carl Casper Nationals 1st ~ USACi 05 Southeast AutumnFest 1st

    polkaudio SR6500 --- polkaudio MM1040 x2 -- Pioneer P99 -- Rockford Fosgate P1000X5D
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  • audiobliss
    audiobliss Posts: 12,518
    edited May 2005
    Right now I'm running my 5.25" mids full-range and I'm pretty sure I'm not missing out too much on the treble stuff.
    George Grand wrote: »
    Jstas wrote: »
    Simple question. If you had a cool million bucks, what would you do with it?
    Wonder WTF happened to the rest of my money.
    In Use
    PS3, Yamaha CDR-HD1300, Plex, Amazon Fire TV Gen 2
    Pioneer Elite VSX-52, Parasound HCA-1000A
    Klipsch RF-82ii, RC-62ii, RS-42ii, RW-10d
    Epson 8700UB
    In Storage
    [Home Audio]
    Rotel RCD-02, Yamaha KX-W900U, Sony ST-S500ES, Denon DP-7F
    Pro-Ject Phono Box MKII, Parasound P/HP-850, ASL Wave 20 monoblocks
    Klipsch RF-35, RB-51ii
    [Car Audio]
    Pioneer Premier DEH-P860MP, Memphis 16-MCA3004, Boston Acoustic RC520
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  • neomagus00
    neomagus00 Posts: 3,899
    edited May 2005
    without the famous momo tweeter? wait till you get it installed :D
    It's not good, very fundamentally simply not good. - geolemon

    "Its not good enough until we have real-time fearmongering. I want my fear mongered as it happens." - Shizelbs
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  • SamSagaZ
    SamSagaZ Posts: 321
    edited May 2005
    biamping the mmcs with the HU is ok? i mean is ok to connect the front channels to tweeters and rear to the mids? (using the Xover of course)
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  • MacLeod
    MacLeod Posts: 14,358
    edited May 2005
    Thats fine. Much better than straight wiring them off the h/u.

    More power is usually always better.
    polkaudio sound quality competitor since 2005
    MECA SQ Rookie of the Year 06 ~ MECA State Champ 06,07,08,11 ~ MECA World Finals 2nd place 06,07,08,09
    08 Car Audio Nationals 1st ~ 07 N Georgia Nationals 1st ~ 06 Carl Casper Nationals 1st ~ USACi 05 Southeast AutumnFest 1st

    polkaudio SR6500 --- polkaudio MM1040 x2 -- Pioneer P99 -- Rockford Fosgate P1000X5D
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  • SamSagaZ
    SamSagaZ Posts: 321
    edited May 2005
    great, ill test it tomorrow... :)
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