Free Shipping on All Orders 1-866-764-1801

Vist our Online Store
+ Reply to Thread
Results 1 to 7 of 7
  1. #1

    Member Sales Rating: (0)

    Join Date
    Jan 2005
    Location
    NJ
    Posts
    2

    Default Monitor 5B Impedance

    I have a pair of Monitor 5Bs that I purchased new in late 1989. I just noticed that the owner's manual states the nominal impedance as 4 ohms. This seems really low for a $225 speaker. The same manual shows all of the smaller Monitors as well as the 7C also at 4 ohms. The 10B and 11 have 6 ohm ratings. Is this correct? If it is, there's some pretty expensive (to me) equipment out there that can't drive these things.

  2. #2

    Member Sales Rating: (4)

    Join Date
    Aug 2002
    Location
    PA
    Posts
    5,850

    Default

    The monitor 5's on polks website shows as 8 ohms. Actually, most of the smaller Monitor's were 8 ohm. Even the monitor 10's and 12's are 8. You'd think that the manual would be accurate, though.
    Ludicrous gibs!

  3. #3
    Old School
    Member Sales Rating: (1)

    Join Date
    Dec 2002
    Location
    Higher & Dryer, Texas
    Posts
    10,177

    Default

    There are a number of inconsistancies between the vintage website and owner manual info... and not just in the Monitor line. Trust the manual...

    My original 10's are nominal 6-ohm per the manual. 6-ohm is not that difficult of a load to drive.

    A 4-ohm load is tough, but Mon 5's are not meant to be driven to concert hall levels (neither are the 7's for that matter). You must be aware of this since you aren't mentioning a problem and have owned the 5B's for 15+ years...

    If drive them you must, there's a great deal of inexpensive (to me) amps out there on the used market that can handle them... Carver for one with several models under $300.

    Welcome to the Club...
    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

    "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
    "Death doesn't come with a Uhaul." - Dennis Gardner

    Rebuilding Maggie 2-ch & Amazing 2-ch... Building 2-ch "wall"... Figuring out the HT

  4. #4

    Member Sales Rating: (0)

    Join Date
    Jan 2005
    Location
    Argyle, NY
    Posts
    18

    Default

    Originally posted by nadams
    The monitor 5's on polks website shows as 8 ohms. Actually, most of the smaller Monitor's were 8 ohm. Even the monitor 10's and 12's are 8. You'd think that the manual would be accurate, though.
    My Monitor 10s actually measure 5.2 ohms with a Fluke 87 III. And I drive them with a 1976 hk-430 rated at 25 wpc with no problem.
    Wayno

  5. #5

    Member Sales Rating: (40)

    Join Date
    Jul 2001
    Location
    North Texas
    Posts
    18,401

    Default

    Put your multimeter on the posts.

    If you get around 3.2 ohm, they are 4ohm nominal. If you get around 5.8-6.3 ohm, they are 8ohm nominal.

    Cheers,
    Russ
    Check your lips at the door woman. Shake your hips like battleships. Yeah, all the white girls trip when I sing at Sunday service.

  6. #6
    Old School
    Member Sales Rating: (1)

    Join Date
    Dec 2002
    Location
    Higher & Dryer, Texas
    Posts
    10,177

    Default

    Good info Russ...

    So waylyn's 5.2 reading would correspond to the 6-ohm nominal... Yes? (ah, the wonders of interpolation...)
    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

    "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
    "Death doesn't come with a Uhaul." - Dennis Gardner

    Rebuilding Maggie 2-ch & Amazing 2-ch... Building 2-ch "wall"... Figuring out the HT

  7. #7

    Member Sales Rating: (0)

    Join Date
    Jan 2005
    Location
    NJ
    Posts
    2

    Default

    4.2 ohms on both. How'd you know I had a multimeter?

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

     

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts