I've been told by a dealer that a particular minispeaker(12x7x8) is capable of putting out clean volume down to 80hz in my 15x26x8(3120cu/ft)ft listening room. The speaker has a high quality "long throw" 5 1/4" mid/woofer, and is rear-ported. Of course I'll be mating it with a subwoofer.
I know, the question is what kind of volume am I looking for. Well, I would hope to be able to get 100 db peaks if possible(without sub). The speaker is rated as -3db at 65hz, and supposedly can handle 150 watts(200 if high-passed).
What do you pros think?? Is it at all possible? Thanks for your help
Curious--I think that at 100db with minispeakers in that room you're going to be hearing lots of distortion. They make make your volume goals but they'll be straining and compressed and will sound like it. Better get some VOTs :-)
Do you think that being cross-over to a sub, and high-passed will make a difference? What are"VOTs"?
Curious--Yeah, the sub will help take some of the strain. VOTs are Altec Voice of The Theaters; large 2-way horn systems with an efficiency of +105db, play very loud with no strain, were originally designed as motion picture theater speakers and later hi-fi and studio versions were made. Very good speakers, were designed in the mid 1940s by John Hilliard and James Lansing and still have a following.
Thanks for your help. The whole reason that I'm looking for small speakers is for aesthetic consideration. The VOTs are probably the opposite of what I'm seeking.
If the excursion is truely a long one and efficiency and power handling are relatively highish,then you should have no problem attaining your goal.For some time I used a loudspeaker with a single 4-1/2" mid bass driver that produced a high quality,fast, clean and tuneful bass reach in the 35 Hz region without a subwoofer and was quite capable of the SPL's you are anticipating in a medium/small sized listening room(tho using a 1/4 wave transmission line enclosure of larger proportions).A word of note, tho: care should be taken in avoiding LF "rumble" and feedback into such a design or most of the available output will go to inaudible cone excursion and heat rather than music.
BTW-what is it that your are considering?
Thanks Guys for the opinions. I'm debating the ACI Emerald speakers. Alot of folks seem to think they're pretty fine, but I've heard some contrary opinions as to whether a smallish speaker like these can cut the mustard(as opposed to cutting another type of gas). I'll probably end up with 5 or seven if I go ahead with the purchase, but for two-channel music combined with a sub, I want to feel confident that they'll handle the task. I believe they're rated as 88db sensitivity. Thanks again
Without going thru the math, I think that that's a lot of air for a pair of 5 1/4" drivers to move, even at 80 hz. Don't forget, it's being almost maxed out.
That is the utmost highest frequency I would want ANY sub to work up to and even then, it should be in the front plane and still may be localized..
If you could, I would strongly suggest you move to a slightly larger speaker that could go down to maybe the 50's or 60's.
what is the speakers rated sensitivity?
if it is 89 spl/1 watt then:
1 watt gives you an spl of 89
10 watts gives you an spl of 99
100 watts gives you an spl of 109
each 10 db increase is a perceived doubling of spl
in other words - 99 is twice as loud as 89
of course there is the 'distance' thing - speakers normally being measured at a distance of 1 meter - you lose db's as you move away from the speaker. If the speaker can really take it - you will probably be able to reach those 100+ db peaks without any problem
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