I built some mid-high speakers with 2 4" speakers on either side of a tweeter. They sound GREAT if I turn the treble wayyyyy down on my amp. How can I do that passively in the speaker?
I have the 4 mids wired to 4 ohms, then put in parallel with the tweeter.
They are used in loud 'party' situations.
Mid- http://www.amazon.com/BRS40-Replace...NX8K/ref=sr_1_7?ie=UTF8&qid=1311366965&sr=8-7
High- Amazon.com: Legacy LT18 3.25-Inch 300 Watt Aluminum Die Cast Super Titanium Tweeters: Electronics
I have the 4 mids wired to 4 ohms, then put in parallel with the tweeter.
They are used in loud 'party' situations.
Mid- http://www.amazon.com/BRS40-Replace...NX8K/ref=sr_1_7?ie=UTF8&qid=1311366965&sr=8-7
High- Amazon.com: Legacy LT18 3.25-Inch 300 Watt Aluminum Die Cast Super Titanium Tweeters: Electronics
yep, but you need to know upfront how much dB you need to lower the tweeters down
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Crossover Design Calculators
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I think I might change things a little. Didn't see any dB specs on the tweeters but they are no doubt rather bright so if I were just winging it, I would change the caps to 1.5 mfd and if the tweeters are 8 ohms then use one 4 ohm resistor in series then an 8 ohm in parallel. That'll tame the beasts. 🙂
I see those are car tweeters so they are likely 4 ohm so I would change it to a 2.2 mfd and use a 2 ohm series then a 4 ohm shunt.
Even the tweeters say 4/8 ohms on the back... answer THAT with your precious logic!
With no good information to go on, Cals' recommendations are a good starting point. Otherwise we need more to go on, that's why I asked if you could measure them. Typically the DC resistance will be aouund 75-90% of the nominal impedance, once that is known, we can give you better suggestions about what to try.
Mike
Mike
I can measure them at my shop, so I will tomorrow! In the meantime, however, is there a set of standard audio grade resistors that I can buy to try out different things?
And also, where are you all getting those numbers for the capacitor!?
OK, here's what I'm thinking; acording to the "specs" published on the E-pay site the speaker drivers response extends to 18kHz, but probably more like 15kHz in reality. If the tweeter is nominally 4ohms, the 3.3uF cap gives a roll off frequency around 12kHz, and the 2.2uF cap would put it around 18kHz except that the tweeter voice coil inductance will give rising impedance with increasing frequency, so a good guess would be an actual roll off around 15kHz or so. And yeah, that's alot of guess work, but with nothing more to go on, it's about the best that can be done.
Mike
Mike
One more thing, just for the helluvit, give them a try with the tweeters disconnected, might sound OK that way.
Mike
Mike
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