monitor 5b ohm load

Sax
Sax Posts: 70
edited July 2006 in Vintage Speakers
heh... so here's something interesting. I'm up on polksda.com and in one of the monitor manuals it shows the monitor 5b to have a 4ohm load, 10-125watts.

the other shows 6ohms, 10-125watts.

So... are my monitor 5b's 4ohm? or 6ohm? That is the question.
Monitor 5b
RTA 11T
Rega Planar 2 (1970's)
Adcom GFA-545II
Post edited by Sax on
· Share on FacebookShare on Twitter

Comments

  • Sax
    Sax Posts: 70
    edited July 2006
    more accurately I suppose I should ask, what is the proper method for determining ohm load of a speaker, when it is an unknown?
    Monitor 5b
    RTA 11T
    Rega Planar 2 (1970's)
    Adcom GFA-545II
    · Share on FacebookShare on Twitter
  • RuSsMaN
    RuSsMaN Posts: 17,986
    edited July 2006
    You can hook up your multimeter, set it to ohm, and measure the resistance at the terminals (with no wire hooked up). It's not a sure fire method, but it will read generally lower than the nominal impendance.

    Eg: An 8 ohm nominal speaker might read between 5.2~ to 7 ohm. A 6 ohm speaker, typically 3.8~ to 5.1 ohm. 4 ohm nominal, 2.5~ to 3.6 or so.

    At the end of the day, unless you are just curious, with a proper amp it won't matter. If you are trying to determine which tap to use on a tube amp, lower is always better than higher - use the 4ohm tap.

    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.
    · Share on FacebookShare on Twitter
  • Sax
    Sax Posts: 70
    edited July 2006
    hmm... true. It just seems curious to me that a "5b" would have been made with different ohm loads. Seems to me that a certain model in a line would have the same characteristics.
    Monitor 5b
    RTA 11T
    Rega Planar 2 (1970's)
    Adcom GFA-545II
    · Share on FacebookShare on Twitter
  • mopedbob
    mopedbob Posts: 12
    edited July 2006
    thanks
    · Share on FacebookShare on Twitter