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Thread: Bridging an Amp

  1. #1

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    Default Bridging an Amp

    I just ordered my system. (see below). Neo, a fellow polkoligist, suggested I bridge the amp for the front speakers.

    At the risk of showing what I don't know -

    What does bridging an amp mean?

    2002 Chevy Silverado 2500HD - Crew Cab

    I ordered my stuff, this is the system:

    Head unit: Pioneer DEH-960MP (Electronics City.com ($399.00)

    Amp: MTX Road Thunder RT404 (Car Domain.com $164.95)

    Fr Speakers: Polk MMC 6500 Componets (Car Domain $299.00)

    Rr Speakers: Polk db 675 (Car Domain $109.95)


    I hope it all comes together as planned..


    Knowledge without brains is stupid...........

    Once again, thank you for any input.

  2. #2

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    Bridging an amp is where you hook one speaker up to 2 channels of an amp. This puts the entire power of the amp into that one channel.

    I perconally dont like this cause, as mentioned, it makes the amp work at 100% which usually translates into more heat and distortion.
    polkaudio sound quality competitor since 2005
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    polkaudio SR6500 --- polkaudio MM1040 x2 -- Pioneer P99 -- Rockford Fosgate P1000X5D

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    You guys are scaring me, (but I do thank you for that).


    Once installed, I guess I can figure it out.


    At this point, I just need to know if I should order a different amp.


    Or, do I have to do the bridge thing?

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    I suggest ordering a new amp. Check out your other thread. I stuck some recommendations on good, cheap amps.
    polkaudio sound quality competitor since 2005
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    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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    Got the post - thanks

    For another $25, I will go for it.

    Any other ideas??

    Need all the advise I can get.

    Doug

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    About the only thing I would change would be to get Momo rear speakers. Its always best to have the same type of speakers and there is a difference in the sound of DB and Momo's. Plus the Momo is a better speaker all around.

    After that, looks like youre set. Just make sure to install properly and use good cables and wiring.
    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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    Which momo's, your not talking about components for the rear doors are you?

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    no, he's referring to the MMC650 set. coax, just better. and they will blend with your fronts much more cleanly.
    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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    I hope you don' t work for the system - lol -

    Thanks for the help

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    Originally posted by spackelman
    I hope you don' t work for the system
    i don't get it... i don't work for the gov't...?
    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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    When I say the system, I mean internet plants (ip).

    People who are paid to be on these forums and advise to go for high end stuff that is simply not needed.

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    Guys - Thank You so much for Your Help!

    Upgraded the amp to the Pheonix Gold and the rear speakers to Polk MMC 650.

    The new sound will provide results.

    Will update

    Thanks Again

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    cool! and no, polk doesn't do that (as far as i know)... if you look around, you'll see polk being rec'd if appropriate, other companies if not. i endorse polk cause i adore my mm6/300.2 setup! :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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    10-4

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    RE - bridging fronts
    ----------------------
    i've had my fronts bridged for years now... run some sick 200 something watts per side... it doesn't make the amp work any harder than if you had bridged it to run subs off of it. There is nothing wrong with briding an amp - if you own a good quality amp with a beefy power supply, then you're not going to have a problem - while I love MTX, the road thunder stuff is not something I'd go messing around with - you may very well cook it inadvertantly. My old Blue Thunder 754 - which historically ran hot with single 4 ohm loads on each channel - has been running at 4 ohms bridged (read: 2 ohms per channel) for a long time now - hot as hell but never gives me troble - and she's got about 4 coats of paint on her from rebuilding it and "restoring" it.


    RE - DB speakers
    --------------------
    The Polk DB junior speakers have very good bass/midbass response, but are kind of weak on trebble.

    As mentioned above - I think its the tweeter as well... just not as "sensitive" as others I guess.

    But see - if all 4 of your speakers are polk db juniors then you can easily just dial up your trebble on your deck and it's fine... sounds absolutely beautiful.

    But if you've got say Momo's up front, or old DX's like me - and db's in the back - then you have to pick a medium happy point because if you raise the trebble too much the fronts sound like crap.

    I noticed this when trying to re-tune my setup - faded to rear and heard NO trebble (well almost none) and was all worried that something was broken - dialed up the trebble maybe 3 clicks on the deck and sure as **** it was BEAUTIFUL sounding. So I kind of found a happy point between front and rear and got it so I'm pleased with it.

    I do reccomend sticking with speaker series through the vehicle (not subs - just the 4 regular speakers) - as even speakers from the same company will sound different from series to series - and that makes tuning harder and can make someone think that a really good speaker isn't as good as it is.
    Last edited by PoweredByDodge; 03-25-2005 at 09:41 PM.
    "With your own attitude it is hard to survive here... But who gives a damn, we are here to change the world, and we dont need a password for that."
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    No we're not paid to be on here we just have no lives and have nothing else to do! :(

    But me and Neo are the only regulars left with Polk gear so I guess we do look suspicious.

    I still prefer not to bridge for fronts. Although its not in danger of killing the amp I still think its better SQ wise to have the amp running as cool as possible. Plus Im a much bigger advocate of bi-amping rather than bridging.
    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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    I've still got all my polk stuff, just not currently using it. If I didnt have to use my big amp on my new comps, I'd have my DX12 in the back, but for now, I've got no bass...:(
    1993 Ford Ranger super cab:
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  18. #18

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    dx 12 = pimpin

    retro gives me an emotionally woody
    "With your own attitude it is hard to survive here... But who gives a damn, we are here to change the world, and we dont need a password for that."
    - Anurag

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    Originally posted by PoweredByDodge
    dx 12 = pimpin

    retro gives me an emotionally woody
    Ewww...I'll remember that next time I mention it, lol
    1993 Ford Ranger super cab:
    Pioneer Premier DEH-P880PRS
    MB Quart QSD216
    in need of amps and subs

    Home:
    52" Sharp Aquos
    PolkAudio Monitor 10's
    Harmon Kardon HK3375
    Xbox 360
    PolkAudio XM tuner

    Owner and co-designer of www.basicholdem.com

  20. #20

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    Originally posted by MacLeod
    But me and Neo are the only regulars left with Polk gear so I guess we do look suspicious.
    Hey, I have MM6's up front and dB650's in the back. And I'm -kinda- a regular. I check in at least every other day, usually every day during the week.
    -Austin
    http://www.silverdragon.com/punkie/c...net.idiot.html - Read it, know it

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  21. #21

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    true... but my post count is bigger than your post count... :p

    i think there's a couple others out there that don't check in as often; i'm just glued to a laptop 24/7... the wonders of going to the most extensively-wired university in the nation...
    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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    I just get bored at work so I come on, usually nothing good to input, so I stay quiet.
    1993 Ford Ranger super cab:
    Pioneer Premier DEH-P880PRS
    MB Quart QSD216
    in need of amps and subs

    Home:
    52" Sharp Aquos
    PolkAudio Monitor 10's
    Harmon Kardon HK3375
    Xbox 360
    PolkAudio XM tuner

    Owner and co-designer of www.basicholdem.com

  23. #23

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    i have polks in my dads truck...and if i dont get this job at the car audio place ill have polk in my g/fs car...
    -Cody
    Music is like candy, you have to get rid of the rappers to enjoy it

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    my recent frequent absences aside - my post count is quite very high - at the tops of this portion of the board - and i still do run 16 polk speakers - as soon as the 88 is done, it's going to be all polk also - keeping with its heritage. i'm even considering straying away from mtx amps for that install (dare i say it) for the polk amps.

    why? i haven't seen anything "earth shattering" out of mtx lately - and the polk amps look better (a comment that only applies when the robustness of the electrical components is known to be of a high grade - which in this case, both companies are).

    i dont need a gillion watts in there either...

    two C300.2's bridged on subs and a 4 channel outa do me good.
    "With your own attitude it is hard to survive here... But who gives a damn, we are here to change the world, and we dont need a password for that."
    - Anurag

  25. #25

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    what about their new 22" 10,000 watt sub??
    -Cody
    Music is like candy, you have to get rid of the rappers to enjoy it

  26. #26

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    duh, he doesn't need a "gillion" watts :)
    http://www.silverdragon.com/punkie/c...net.idiot.html - Read it, know it

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  27. #27

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    you are so white
    "With your own attitude it is hard to survive here... But who gives a damn, we are here to change the world, and we dont need a password for that."
    - Anurag

  28. #28

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    Originally posted by PoweredByDodge
    you are so white
    thats funny, i dont care who ya are
    -Cody
    Music is like candy, you have to get rid of the rappers to enjoy it

  29. #29

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    Originally posted by PoweredByDodge
    i'm even considering straying away from mtx amps for that install (dare i say it) for the polk amps.

    why? i haven't seen anything "earth shattering" out of mtx lately - and the polk amps look better (a comment that only applies when the robustness of the electrical components is known to be of a high grade - which in this case, both companies are).

    two C300.2's bridged on subs and a 4 channel outa do me good.
    I hear ya brother. Im not real turned on by the latest MTX amps either. They sure do look funky. I have however been more and more impressed with Polk amps the more reviews I read and the more I figit with them at Tweeter.

    I agree that both Polk and MTX have exceptional build quality and make power well beyond their ratings. Im gonna reserve judgement on MTX amps tho for a while. They claim to be using a lot of Xtant technology in the new Thunders and Xtant are at the top of my short list for amps.
    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

  30. #30

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    Xtant still aint what they used to be though...
    -Cody
    Music is like candy, you have to get rid of the rappers to enjoy it

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