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whats it all mean?

Discussion in 'Amps and Cabs [BG]' started by Sharp, Jun 13, 2002.

  1. Sharp


    Jan 27, 2002
    Artists Relations, KMI
    Im new to power amps and cabs, all ive ever used were combos. looking to buy up, but i have no idea about what goes with what.

    what's RMS? what're ohms?

    how do i know if the head will work with the cab?

    is there anything i should watch out for?

    any help would be really appreciated

  2. RMS, to me should be RWP(Real World Power) It's the actual amount of constant power you'll have...
    Ohms are the measure of a speakers resistance, someone'll give you an instance to think about...

    If a head says, well let's take my head, Hartke HA3500(350W @ 4ohms - 240 @ 8ohms), and well, let's say My own X Audio 18, 300W @ 8ohms, I'm only pushing 240W into the 8ohm load, which is ok, b/c, it's less than the speaker's maximum....I won't get into Headroom, since I'm not proficient in it @ all....If a head says 350W @ 4ohms - 240 @ 8ohms

    You can use 1 - 8 ohm cab(240W)
    2- 8 ohm Cabs(350W)
    1 - 4 ohm Cab(350W)

    Whatever you do, if a head says 4 Ohm Minimum, Don't go below 4 ohms, you'll fry it.... here's some info...

    Don't look at peak power ratings, they're not constant....

    1 8 ohm speaker=8ohms
    2 8 ohm speakers=4Ohms
    1 4 Ohm speaker = 4ohms
    1 4 Ohm and 1 8 ohm speakers=2.67Ohms
    2 4 ohm speakers = 2 ohms

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