I have a set of 3.5" coaxial speakers in the rear hatch of my Dodge Caliber that each have an impedance of 4 ohms.
I'm replacing these and am going to customize the enclosure to accept 6" components. I plan on using a separate mid-bass and tweeter.
The drivers I am looking to use are 8 ohms each. The tweeters I would like to use are also 8 ohm. I assume I will need to use a capacitor to filter out the low frequencies from the tweeter. What value capacitor should I use? Is there a good how-to on how to pick capacitors for this application?
The bigger dilemma is that in order to get the impedance to match that of my other speakers in the car (all are 4 ohm), should I simply wire the tweeter and mid-bass driver in parallel to that channel? That should yield 4 ohm if I'm not mistaken, correct? Is that how co-axials work, an 8 ohm tweeter & mid-bass driver wired in parallel?
Any info / suggestions on the subject would be much appreciated.
I'm replacing these and am going to customize the enclosure to accept 6" components. I plan on using a separate mid-bass and tweeter.
The drivers I am looking to use are 8 ohms each. The tweeters I would like to use are also 8 ohm. I assume I will need to use a capacitor to filter out the low frequencies from the tweeter. What value capacitor should I use? Is there a good how-to on how to pick capacitors for this application?
The bigger dilemma is that in order to get the impedance to match that of my other speakers in the car (all are 4 ohm), should I simply wire the tweeter and mid-bass driver in parallel to that channel? That should yield 4 ohm if I'm not mistaken, correct? Is that how co-axials work, an 8 ohm tweeter & mid-bass driver wired in parallel?
Any info / suggestions on the subject would be much appreciated.
The capacitor for the crossover needs to be selected with consideration for the usable/desired frequency response and the power handling.
Since the capacitor blocks lower frequencies from the tweeter and the increasing inductive reactance blocks the higher frequencies from passing through the midbass driver, the amp only sees an 8 ohm load, even though the speakers (with their crossovers) are essentially connected in parallel.
Why do you want to match the impedance of the other speakers?
Since the capacitor blocks lower frequencies from the tweeter and the increasing inductive reactance blocks the higher frequencies from passing through the midbass driver, the amp only sees an 8 ohm load, even though the speakers (with their crossovers) are essentially connected in parallel.
Why do you want to match the impedance of the other speakers?
Thanks for the explanation, that makes sense.
My belief is that I'd need a 4 ohm load, otherwise they'd be receiving approximately half the power of the other speakers, thus wouldn't be as loud.
Even if I installed an aftermarket amp, which I probably will at some point, the 8 ohm configuration would be less than ideal for using the amp to its potential.
My belief is that I'd need a 4 ohm load, otherwise they'd be receiving approximately half the power of the other speakers, thus wouldn't be as loud.
Even if I installed an aftermarket amp, which I probably will at some point, the 8 ohm configuration would be less than ideal for using the amp to its potential.
The amp would produce less power into the higher impedance load but the output level would depend on the efficiency of all of the speakers in the system. If the 4 ohm speakers were significantly less efficient, they could actually produce less output than the 8 ohm speakers at any given power input.
If the amp that you eventually connect to the speakers produces enough output for you, why would you be concerned that the amp could produce more output?
If the amp that you eventually connect to the speakers produces enough output for you, why would you be concerned that the amp could produce more output?
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