Building my own 3 way, please critique!

[79Bronco]

I understand impedance does not change on a bridged setup. It is bridged to draw more power since the drivers are 8 ohm.

I was under the impression that crossovers do not greatly affect the impedance seen by the amp. I thought their only job was to split up frequency. Why, in this case, does the crossover all of a sudden have a huge impact on the nominal impedance seen by the amp?

[rockFord_Expedition]

It's not an all of a sudden change. Have you ever bought a component set bnib and measured the impedance of each speaker individually? You can have 2 4 ohm speakers connected to a passive xover and the amp "sees" 4 om still.

You can read up on it here: http://www.diyaudio.com/forums/car-audio/147511-component-speakers-impedance-values.html

[79Bronco]

It's not an all of a sudden change. Have you ever bought a component set bnib and measured the impedance of each speaker individually? You can have 2 4 ohm speakers connected to a passive xover and the amp "sees" 4 om still.

You can read up on it here: http://www.diyaudio....nce-values.html

:facepalm:

Yes I understand this.

I have two 8 ohm speakers.

Amp should see an 8 ohm load, correct?

The way I read your post made it seem like the crossovers would have an effect on the nominal impedance seen by the amp.

[rockFord_Expedition]

I was going off of the "impedance load on amp??" part of your drawing. Sorry if I was beating a dead horse there.

[79Bronco]

so 8 ohms nominal?

and yes this setup will work?

lol

[rockFord_Expedition]

.

[79Bronco]

Funky, I think I get what you are trying to say. I understand that the impedance seen by the amplifier is constantly changing as music is sent to the speakers. I understand that by introducing a passive crossover, the goal is to make the impedance much higher at lower frequencies for the tweet and much higher at higher frequencies for the mid. By making the impedance exponentially high, the hope is that the signal roll-off will be so great, that there will be little to no reproduction of undesired frequencies.

Is that what you're trying to get at?

The only reason I am asking for nominal load is because I want to know, realistically, what kind of amplifier to start looking for.

[79Bronco]

Bump, would like to order everything tomorrow.

[79Bronco]

Speakers and crossovers have arrived. I'll be returning them all. I've decided to just go fully active instead.

Swapping out the nd105-8 for the 4 ohm version, will be looking for different tweeters as well.

Also looking for advice on an active crossover. If I can get away with just running the one built into the amp, I'd be much happier than shelling out 100-300 for an external.

[79Bronco]

Here's the new plan.

Amp is a Soundstream 6 channel.

Components are

Cadence Tweet

Dayton Mid

Beyma Woofer