Hmm...I liek that better than Route Means Squared. Never did like that
version, and its birth. Hence the reason i try not to slam a possible
peak/max power from the radio into a speaker w/ the same peak value....
It is lively, and depending on several things it could spike and blow
those babies. Not too mention that Freq Response on the speakers.
Ultra low base is never a good idea unless the speakers can handle it or
are protected by those filters (ah cross overs or band pass
filters???).... The flip side is the high side.... Ilike that CP
thought, and would expect those max power handlings to definitely be up
there, and look at the RMS on those babies.... I say low budget tunes,
and high funds to the muscle magnum.....
> -----Original Message-----
> From: Shaun.Hendricks@bergenbrunswig.com
> [SMTP:Shaun.Hendricks@bergenbrunswig.com]
> Sent: Monday, January 25, 1999 6:33 PM
> To: dakota-truck@buffnet.net
> Subject: DML: RE:DML RMA vs Cont Prog
>
> This is pretty good stuff, but I have some other input that might
> help.
>
> RMS= Really Moronic System (of measurement)
>
> This (RMS) is almost an ignorable statistic. The best stat for
> measuring
> speakers it their CP or Continuous Program capability. This sits
> (roughly) in
> the middle of their power band and takes into account where the
> manufacturer
> says the speakers should be run at median signal (hz) and median power
> for
> maximum preformance. A set of 150 Watt CP speakers will waste a set
> of 150
> Watt (RMS) speakers. The RMS speakers will die from thermal or
> separation at
> around 170 Watts whereas the 150 Watt CP speakers can (usually) handle
> spikes
> in power at around 300 Watts. Remember, audio is a lively bouncy
> thing that
> never stays put and signals that do, tend to damage things: including
> speakers.
> My rule of thumb is to purchase extremely clean amps that are twice
> the
> power of the targeted speakers Continuous Program. If I start to hear
> distortion in the sound then I know I am pushing my speakers too hard
> and can
> back the volume down, as the amps only put out distortion at a power
> level
> higher than the CP of the speakers. In this manner I don't risk the
> speakers
> or the amps to blowout.
> There is no hard and fast rule for converting RMS to CP... if the
> manufacturer doesn't have a CP rating for the product, you may want to
> consider going to a higher classed product or a better manufacturer.
> Sometimes they hide the CP ratings in the speakers vital stats area.
>
> Shaun H.
>
> ---original message---
> While it is possible to blow speakers from too much power (actually
> tearing the cone from the spider), it's extremely difficult.
> However,
> it's way too easy to blow speakers from too much distortion.
> Distortion
> is measured in % of THD (Total Harmonic Distortion) at a particular
> wattage output. Lower is better, preferably .1% or lower. When
> shopping,
> I TRY (but don't always succeed) to get an amplifier that equals or
> slightly exceeds the power rating of my speakers (both in RMS, of
> course),
> with very low distortion. If you go lower than the rated output of
> your
> speakers (assuming a quality amp), just make sure you don't have to
> turn
> up the amp too far. If gain must be set above about 5/8 or 3/4 to get
> sufficient output, you have an underpowered amp. The closer you get
> to
> the top of the gain knob, the more distortion. The very best systems
> run
> with the gain at the lowest setting (turned counter-clockwise all the
> way). Mine doesn't, because I'm cheap (it's around 1/2 of maximum).
> My
> two indian-heads.
>
> David Gloff
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