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Rockford Fosgate Speakers: Don't sound as expected

Discussion in 'Audio' started by Blazer79, May 20, 2001.

  1. Blazer79

    Blazer79 1/2 ton status

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    Rockford Fosgate Speakers: Don\'t sound as expected

    I installed a pair of new 6x9 Rockford Fosgate FRC1369 speakers below the rear ashtrays on my Blazer. I bought them online convinced by the sound of a Rockford Fosgate 10" sub I have. They sound loud, and have crispy highs, but almost no bass! They have some bass, but not what I expected. I compare them to a pair of cheap Audiovox 6x9 in my Toyota truck and those have much more bass than the RFs. Why?

    I installed them on a set of brackets I fabricated myself made from the metal covers found on the rear of computer cases. These are screwed directly to the Blazer metal. They are pretty solid. I then cut the appropiate size hole on each of the cardboard side panels. The four screws on each speaker pack together (in order of appearance) a plastic frame that came with the speakers, the side panel, the speaker, the metal brackets. Everything is very solid.

    I can see the speakers cones shaking a lot but little bass. I checked my amp and crossover and they are OK, no high-pass switches or anything like that. Am I doing something wrong here? or am I expecting too much from those speakers?

    Things I'm aware of:
    1) FRC is their lowest end series
    2) A toyota truck cab is much smaller than my Blazer
    3) Rockford Fosgate doesn't sell them online so that they are proffessionally installed. (I bought them online on an auction)

    Thanks for your help...and sorry for the long post.

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  2. Storm Trooper

    Storm Trooper 1/2 ton status GMOTM Winner

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    Re: Rockford Fosgate Speakers: Don\'t sound as expected

    Juan,
    I'm no pro but i'm assuming that your amp. is a 3 or 5 channel?
    I belive that most amp.s use a crossover to transfer most of the bass to the sub and the mid/highs to the other speakers.
    Have you tried them without the amp.?
    Are they enclosed in the back panel?
    I have a RF 12" sub, Infinity 6x9 referance in the rear (same place), Infinity 6-1/4 referance in the doors and a Alpine 5 channel amp. My reciever is a panisonic G-tech that has seperate pre outs for front, rear and sub and I can adjust the sub from the reciever.
    The system cranks but I don't have any super bass from my front or rear speakers, The sub takes care of that.
    Maybe you are expecting too much from your speakers or need a slightly diferent set up????? Sorry I wasn't more help.

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  3. Prembird

    Prembird 1/2 ton status

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    Re: Rockford Fosgate Speakers: Don\'t sound as expected

    to add to the other reply.... Another thing that might case this problem is that all midrange and bass speakers will sound better in an enclosed area... kinda like subs need a box... if the area that they are mounted in are open (behind the panel) then it is almost the same as running it with them sitting in the seat.. you wont get much out of them.. the toyota probably came with 6x9 back there and they semi sealed the back area where the speakers are mounted.. thus makeing an enclosure of them to sit in.. if they are sitting wide open behind the panels then add some filling or something to make a little enclosure.. you will probably get more out of it that way.. Hope this helps

    Prembird

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  4. DBLAZER

    DBLAZER 1/2 ton status

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    Re: Rockford Fosgate Speakers: Don\'t sound as expected

    Try deadenig the surround metal. The metal will cause the speakers to have a tinny sound. The speakers will perform at ther best in some sort of wooden encloser.

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  5. Blazer79

    Blazer79 1/2 ton status

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    Re: Rockford Fosgate Speakers: Don\'t sound as expected

    My amp is a Jensen [​IMG] 600w (300rms) 4 amp channel. It doesn't have any HPF, just LPF. I don't have a head unit. I use a portable minidisc that's connected to a 5 output crossover which feeds my amps. I tried connecting the minidisc directly to the amp, but it sounds the same.

    I think you're right. Maybe I'm expecting too much from them because I turn off the sub amp to hear them alone. That's a big difference. I'm going to try making some boxes from some MDF left overs I have. Any ideas on what size? Sealed?

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  6. Blazer79

    Blazer79 1/2 ton status

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    Re: Rockford Fosgate Speakers: Don\'t sound as expected

    I want to try to make some MDF boxes. Can you give me some ideas on what size or type? Thanks.

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  7. DBLAZER

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    Re: Rockford Fosgate Speakers: Don\'t sound as expected

    I would have to say somewhere in the area of 8X11X6 ?? Thats is just a guess, it really wont matter, just enclose them!!!


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  8. Blazer79

    Blazer79 1/2 ton status

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    Re: Rockford Fosgate Speakers: Don\'t sound as expected

    Thanks, DBlazer. That should keep me busy this weekend. [​IMG]

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  9. CaptCrunch

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    Re: Rockford Fosgate Speakers: Don\'t sound as expected

    yeah 79... I cut in 6x9's and I absolutly hate it... the Bass isn't that bad, but it rattles and buzzes (could be the speakers them self some). Gonna try dyno matting it and maybe making some litle enclosres behind the panels. I already have 2 sub boxes I made to go over the wheel wells so I hate to make more and have more crap in the way when I need to haul something.

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  10. Prembird

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    Re: Rockford Fosgate Speakers: Don\'t sound as expected

    if you dont want to spend alot of cash on sound deading material you can also us an undercoating rubber spray... they sell these at most automotive stores (i.e. oriellys, advanced auto parts, pep boys, etc) and apply it to the inside of your rear quaters and it will act as a sound deading material... it makes the panels heavier so they dont vibrate as much... after using this and letting it set up you could use a poly fill around the rear speakers to make a form of an enclosure.. this way your not having to build a complete box or break out the fiberglass/bondo in order to seal it up.... now it wont be completely sealed (best if it was) but it will help out alot on what you want them to do... Also just as an after thought... did you make sure your wires are connected correctly.. if you have one set messed up then the most noticable difference is in the low end.. the sound waves end up canceling each other out.....hence it sounds like there is no low end at all... the speakers will be movin really good but there wont hardly be any sound... hope this helps out... if anyone disagrees with me feel free to let me know...

    Prembird

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  11. Blazer79

    Blazer79 1/2 ton status

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    Re: Rockford Fosgate Speakers: Don\'t sound as expected

    The whole tub has been undercoated already, but the cardboard panels haven't. Since I have some spare MDF, I'll go ahead and make some new boxes anyway.

    Now it's a very interesting point on the wave cancellation idea. I'm sure the speaker ends are not reversed because one plug is larger than the other, but I'll check on the amp side.

    Thanks for your post.

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  12. Prembird

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    Re: Rockford Fosgate Speakers: Don\'t sound as expected

    notta problem.. alot of peps mess that up and dont realize it.. i have had to change it on alot of peoples cars... one way to find out is just disconnect one speaker.. if the low end comes up a little then there is your problem...

    Prembird

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  13. jarheadk5

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    Re: Rockford Fosgate Speakers: Don\'t sound as expected

    I was about to suggest checking the polarity, but someone beat me to it...

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