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  1. #1
    Sooner_Cayman's Avatar
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    Another complete aftermarket Stereo install

    I have posted another link regarding issues I had with my installer, but it is time to show off the final product and give my thoughts.

    I have a 2008 CS with the Bose system, CDR 24. I love music and have to have ipod and XM. So, I chose to bypass the bose and do a complete overhaul. I have always used and loved Pioneer, so I chose the new Pioneer 920-bt nav head unit. This is a new model, and has a couple cool features including Pandora link and a Music sphere. Havent had a chance to use musicsphere, but the Pandora is pretty slick,

    For the amp, I went with an Alpine PDX-5. I ran the stock speakers minus the sub for awhile, but when I was having the amp moved and reinstalled (see other post), I had the 3-way "front" speakers replaced with Hertz 163 3-ways, and then a week later had a JL W3 sub with custom enclosure placed in the rear.

    Thoughts:

    Had a lot of issues, with the actual install and the overall sound quality. If I were to start over, I probably would have either purchased the digital interface for the Bose amp and used the Pioneer, or probably just purchased the ipod adapter.

    I love the pioneer and the bass sounds good. However, I have had a terrible alternator whine that can not be cured. I have rewired everything myself, grounded and regrounded, and even grounded the rca's. Only answer, which was done by the 2nd installer, was to turn the gains on the amp way down. This has defeated the whole purpose of the amp, and the Hertz sound like **** with out the adequate power. Installer solution: ditch the PDX and run 2 amps, 1 for the sub and another for the sub that are higher power and won't require high gains. Recommended amps: JL Audio HD600. Price, an additional $1500.

    The sub sounds good, and the enclosure looks great imo. I really do not want to replace the amp and put more money into this, so I am actually thinking about bypassing the amp for the front channels and just running them off the head unit (like the rears are hooked up), and just use my amp for the sub. I just hate alternator whine.

    On a positive note, the stereo looks great, the bezel is an exact match for color and it looks oem. Sub also is a great addition, and looks nice in the trunk!

    Another complete aftermarket Stereo install-img_0385.jpg

    Another complete aftermarket Stereo install-dsc01243.jpg

    Another complete aftermarket Stereo install-dsc01039.jpg


  2. #2
    rubber_ducky's Avatar
    rubber_ducky is offline Site Upgrade Donor
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    Re: Another complete aftermarket Stereo install

    Sub box does look good. Bummer about the alternator whine. It's a shame about all of the work & money that went into it only to find no solution.

    The pandora thing sounds cool.

  3. #3
    stevewen1's Avatar
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    Re: Another complete aftermarket Stereo install

    I was never able to find a cure to my alternator whine either. I re-routed cables, and tried different grounding points. Nothing seemed to remove the alternator whine. The answer for me was the Monster Noise Silencer. Its a very high quality ground loop isloator and does not degrade the sound.

  4. #4
    Sooner_Cayman's Avatar
    Sooner_Cayman is offline Porsche Chatter
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    Re: Another complete aftermarket Stereo install

    Did the Monster silencer do the trick?

  5. #5
    dave-t's Avatar
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    Re: Another complete aftermarket Stereo install

    did you install a batcap? I believe that would fix the alternator issue because it is a batter source just for the stereo. most high end system will have one.

    dave-t

  6. #6
    Sooner_Cayman's Avatar
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    Re: Another complete aftermarket Stereo install

    [QUOTE=dave-t;472460]did you install a batcap? I believe that would fix the alternator issue because it is a batter source just for the stereo. most high end system will have one.

    BATCAP as in a seperate or replacement battery? Or a farad? I looked at the website and saw a lot of different products. So no, I am not using one!

  7. #7
    kaotic504 is offline Porsche Enthusiast
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    Re: Another complete aftermarket Stereo install

    [QUOTE=Sooner_Cayman;472649]
    Quote Originally Posted by dave-t View Post
    did you install a batcap? I believe that would fix the alternator issue because it is a batter source just for the stereo. most high end system will have one.

    BATCAP as in a seperate or replacement battery? Or a farad? I looked at the website and saw a lot of different products. So no, I am not using one!
    he's talking about a capacitor, it's measured in Farad's. a 1 farad should be good enough. they do have small 1/2 farad capacitors too. i used to run one in my Accord but i had a 1000w system.

  8. #8
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    mrwonder is offline Porsche Enthusiast
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    Re: Another complete aftermarket Stereo install

    I'm sorry what which digital interface for the Bose amp would you have gotten? I've been looking for one and am not aware that it exists.

  9. #9
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    Re: Another complete aftermarket Stereo install

    Yeah a capacitor should do the trick, but also a very simple and cheap method may just to be add some ferrite beads (cores) to the wiring, as tehse are great for fighting noise issues in any electrical system.

  10. #10
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    Re: Another complete aftermarket Stereo install

    Quote Originally Posted by Sooner_Cayman View Post
    Did the Monster silencer do the trick?
    Sorry it took so long to reply. The Monster Silencer removed whine coming in from the RCAs. However, i also have whine coming directly from the amp. I have gone thru 3 amps and all have the same problem. Ive tried several grounding points but now i may try a capacitor. Have you found a solution for your problem?

  11. #11
    dave-t's Avatar
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    Re: Another complete aftermarket Stereo install

    The whine from your amps are from your gain. If the gain is up to high you will get distortion, static or whine. Also are you running aftermarket speakers and a sub on one amp. If so you are may under powered. A sub should be powered by a class Amp and the rest of the speakers on a class AB amp. You should definitely have two though. I just put a monster system in my cayman: Morel 9" 3-way Elates, Morel 8" ultimo sub and for amps a Focal Duel monitor for the 3-ways and a Focal 1.800Le for the sub. also in stalled a Batcap and JL CleanSweep and Summing device.

  12. #12
    stevewen1's Avatar
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    Re: Another complete aftermarket Stereo install

    I just found my problem. My Morel ADMW 9" (-) terminal was grounding against part of the door frame. There is still a little whine but its really faint and i can tune it out with my gains.

  13. #13
    antwart's Avatar
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    Re: Another complete aftermarket Stereo install

    So here I am new to all this. I have a 2008 Cayman S with Bose upgrade. No AUX of course. No GPS, Blue Tooth, Sirrius, etc. Went to an after market installer who explained that BOSE speakers are set up with different imped. from other speakers and therefore they will not work with a new amp. He said I should stick with the BOSE speakers and amp, have them use an available harness to marry a new radio to the BOSE amp and speakers, and let them deal with a possible loss of FM quality signal. Suggestions, thoughts, advice.

  14. #14
    Atlas_Croc's Avatar
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    Re: Another complete aftermarket Stereo install

    Used to do a fair amount of high end audio work in the past, and on really stubborn alternator whine I always had to add some inline power filters for the amp such as the following.....

    American International S-25A Power line noise filter at Crutchfield.com

    The link is for a 25 amp version. If your amp has a 40 AMP fuse (and similar draw) then you can run two of them in parallel for a 50 amp compacity. There is also a 15 amp version that would be good for the head unit. Just make sure you exceed the rating of the amp/head unit with enough filters. I have used three in parallel before with great results. Not one bit of whine where there was before.

    If you have good quality shielded patch cables & good ground points then I would be fairly certain your problems will go away with the above filters with no detriment to sound and you can put the gains where you want them.

    Good luck with it.
    ---------------------

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  15. #15
    rastta's Avatar
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    Re: Another complete aftermarket Stereo install

    Quote Originally Posted by antwart View Post
    So here I am new to all this. I have a 2008 Cayman S with Bose upgrade. No AUX of course. No GPS, Blue Tooth, Sirrius, etc. Went to an after market installer who explained that BOSE speakers are set up with different imped. from other speakers and therefore they will not work with a new amp. He said I should stick with the BOSE speakers and amp, have them use an available harness to marry a new radio to the BOSE amp and speakers, and let them deal with a possible loss of FM quality signal. Suggestions, thoughts, advice.
    To use an aftermarket headunit - along with the Bose Amp you need to run a MOST-HUR adaptor which runs around $600. I figured at that price - i'd rather run a better amp and speakers from my aftermarket headunit.

  16. #16
    ronsno is offline Site Upgrade Donor
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    Re: Another complete aftermarket Stereo install

    Quote Originally Posted by rastta View Post
    To use an aftermarket headunit - along with the Bose Amp you need to run a MOST-HUR adaptor which runs around $600. I figured at that price - i'd rather run a better amp and speakers from my aftermarket headunit.
    For those of you with questions on keeping your Bose, read this thread:

    http://www.planet-9.com/cayman-boxst...vic-120bt.html

  17. #17
    prostar19 is offline Newbie
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    Re: Another complete aftermarket Stereo install

    I have found this in boats with whining. If you run a ground from the stereo directly to the amp it should go away. Works great in boats so maybe it will work in the car. Please let me know if it does

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