7b's converted to center channel

Neoman
Neoman Posts: 12
edited March 2005 in Speakers
Hello fellow Polk enthuthiasts,

I have used the two midbass drivers with one Peerless tweeter from my Polk 7B cabinets to make a center channel speaker. I am not a experienced speaker builder so I thought I could experiment and construct the cabinet to the same demensions as the CS2 model at Circuit City which also has two 6 1/2" and one 1" tweeter.
I have a few questions on using the stock crossover from the 7B monitor.
I plan on parralelling the two 6 1/2's should be ok at 4ohms?
Box demensions are 7- 3/4 H x 21-1/4 W x 11-1/8 D
I will be using a 2" flared port 3"long ported on rear.
I am not shure if I will be getting midrange lobbing effects?
Should I be considering a three way x-over?
What are the x-over points for the stock 7B?
Any other suggestion?

I am waiting on the port to come in from
Parts X-press, then I'll jump right in!

Cheers! Neoman:rolleyes:
Post edited by Neoman on
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Comments

  • Tour2ma
    Tour2ma Posts: 10,177
    edited March 2005
    Please tell me that the 7's cabinet was beyond salvaging...
    More later,
    Tour...
    Vox Copuli
    Better to remain silent and be thought a fool, than to open your mouth and remove all doubt. - Old English Proverb

    "Death doesn't come with a Uhaul." - Dennis Gardner
    "It's easy to get lost in price vs performance vs ego vs illusion." - doro
    "There is a certain entertainment value in ripping the occaisonal (sic) buttmunch..." - TroyD
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  • Neoman
    Neoman Posts: 12
    edited March 2005
    Yes I got carried away and cut up one 7B cabinet. Thought I would use it until I saw it was made of particle board, did'nt cut very clean. Its ok because I have one of the 7B's cab left. If the center channel experiment does'nt work I'll build better cabs and resurect the monitor 7's! By the way I'm using 5 jrs with silver coil tweeters as mains, needed to save on space. Hope that peerless out of the 7 is a close match.

    Neoman
    :)
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  • Polkersince85
    Polkersince85 Posts: 2,883
    edited March 2005
    I hate to see the 7's destroyed if they were good. Seems that you could pick up some used drivers and tweets off of ebay especially if you are going to build the cabinets anyway.
    >
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    >This message has been scanned by the NSA and found to be free of harmful intent.<
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  • Tour2ma
    Tour2ma Posts: 10,177
    edited March 2005
    Ugh... sorry to read that.

    Somehow I got Monitor 10 in my head earlier.

    Contact Ken Swauger, Polk Customer Service, and he'll send along schematics for the model 7B and 10B. I'd think you're looking at a hybrid of these two x-overs, i.e., circuit for the 10B using component values for the 7B.
    More later,
    Tour...
    Vox Copuli
    Better to remain silent and be thought a fool, than to open your mouth and remove all doubt. - Old English Proverb

    "Death doesn't come with a Uhaul." - Dennis Gardner
    "It's easy to get lost in price vs performance vs ego vs illusion." - doro
    "There is a certain entertainment value in ripping the occaisonal (sic) buttmunch..." - TroyD
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  • Neoman
    Neoman Posts: 12
    edited March 2005
    Thanks Tour2ma I'll contact Mr Ken and let you know how I fair with my experiment.

    Sorry that was my first Classic speaker Polk Monitor 7B bought in 82 great sound and imaging...sigh:( betrail to a classic just to save a couple hundred

    Neoman
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  • Tour2ma
    Tour2ma Posts: 10,177
    edited March 2005
    Well.... at least it wasn't an original Mon 7... That'd be a hangin' offense for sure... ;)

    Suggest you call Ken rather than e-mail him.
    More later,
    Tour...
    Vox Copuli
    Better to remain silent and be thought a fool, than to open your mouth and remove all doubt. - Old English Proverb

    "Death doesn't come with a Uhaul." - Dennis Gardner
    "It's easy to get lost in price vs performance vs ego vs illusion." - doro
    "There is a certain entertainment value in ripping the occaisonal (sic) buttmunch..." - TroyD
    · Share on FacebookShare on Twitter