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3-3/8" Bullet Tweeter
would a resistor be necessary for these?
if i put these in a cabinet with a GRS 8in poly cone. would the tweeters overpower the woofer with out a resistor? how effecient are these. tweeters can get pretty loud even if the spec sheet says 8 ohms, should i bumb it up to 10 or maybe 12? just want to make all the necessary purchases at once!
If you mean the GRS 8PF-8 or the 8PR-8 then yes, you will have to use a resistor to reduce the level of this tweeter. In fact, you'll have to reduce it a lot because this is a very sensitive tweeter, and those woofers have only an average sensitivity. This tweeter has a sensitivity of 100dB/W/m, whereas the 8PF-8 has a sensitivity of only 87dB/W/m. Using a simple L-pad calculator online, I found that you'll need a 6.21 ohm resistor in series with the tweeter, and a 2.31 ohm resistor in parallel with it. Alternately, if you just use a single resistor in series with the tweeter then it'd have to be a 27.73 ohm resistor. If you use the L-pad then you can use a crossover designed for an 8 ohm speaker (because an L-pad keeps the effective resistance the same), but if you use the single resistor then you'll have to adjust the crossover so that it works with the new effective resistance of the tweeter, which would be 27.73 + 8 = 36 ohms.
Date published: 2013-11-06