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View Full Version : Wiring 8ohm tweet to 4ohm



Jared530
07-18-2009, 12:01 AM
Ok this is pissing me off! All the tweets i want to order are 8ohm or some other impendence besides 4ohm. How can you wired these to 4ohm?

wyatt315
07-18-2009, 12:02 AM
cant

WrenchGuy
07-18-2009, 12:03 AM
Your looking at the wrong ones.

Jared530
07-18-2009, 12:36 AM
******* ******. So im stuck with filtering out non-4ohm'ers?

ciaonzo
07-18-2009, 12:42 AM
It doesn't matter. Let's say they're 90dB efficient 1W/1M. With one watt of input you're already at 90dB. 2 watts 93dB. 4 watts 96dB. 8 watts 99dB. How much power do you really need to dump into it? More power is great for dynamics/transient attack and of course protection from clipping but it's still going to be plenty loud.

mcsoul
07-18-2009, 12:49 AM
wat u lookin at?

Jared530
07-18-2009, 01:02 AM
wat u lookin at?

Im looking at the morels as well as the seas but they are all 8ohm and 6ohm respectively. But I really dont know if i should go with metal or a soft dome tweet. Quite frankly I dont know the difference im new to this department of CA. I listen to all rap if that helps

Brian_smith06
07-18-2009, 01:06 AM
it's not going to take a ton of power to get your tweeters to sound good.

I will say headroom is a beautiful thing though ;)

mcsoul
07-18-2009, 01:11 AM
What mid and crossover are you using, what's your budget for the tweeters?

Jared530
07-18-2009, 01:25 AM
Im just running passive with Mpyre 65M's and the xover that came with it. Running with a sax125.2. Budget for tweets probbaly ~65-75

ciaonzo
07-18-2009, 01:28 AM
Im just running passive with Mpyre 65M's and the xover that came with it. Running with a sax125.2. Budget for tweets probbaly ~65-75

This new information changes my answer from earlier then. Your new problem is now finding a tweeter with the exact same impedance profile that those passives were designed for. Go active.

Jared530
07-18-2009, 02:10 AM
This new information changes my answer from earlier then. Your new problem is now finding a tweeter with the exact same impedance profile that those passives were designed for. Go active.

How much work is going active? Everyone makes it sounds intimidating even though it sounds like it would be fun to work with. What crossovers would i need to buy? and would i need a 4ch instead of a 2ch?

ciaonzo
07-18-2009, 02:17 AM
How much work is going active? Everyone makes it sounds intimidating even though it sounds like it would be fun to work with. What crossovers would i need to buy? and would i need a 4ch instead of a 2ch?

It's really not that bad, just takes time and patience. Understanding slopes and phase behavior is a big plus but there are some safe routes one can take to get started. A convenient way to go is an active HU and yes you need one channel per driver, so for a two way active with a sub you will need a minimum of five channels.

Getting rid of all the reactive components that the passive crossovers were comprised of will let the amplifier provide better damping and will actually make more power available for the driver.

Blue Fury
07-18-2009, 02:25 AM
Why do you think 8 ohm is bad?

James Bang
07-18-2009, 03:08 AM
what you'll have to do is buy 2 pairs and run them parallel on both sides. boom 4 ohms. wtf is up w/ the N-bomb?

galacticmonkey
07-18-2009, 03:16 AM
8 ohm FTW.

vellocet
07-18-2009, 03:20 AM
Amusingly this is how I ended up going active. Not sure if there is still an active clarion head unit for sale on the cheap, new. Was a real educational experience.

James Bang
07-18-2009, 03:42 AM
oh noes... 8 ohm! all my speakers in the front are 8 ohmers. sux

Jared530
07-18-2009, 05:50 PM
well if you guys point me in the right direction for a new 4ch amp, HU, and xovers that would be nice. I havnt the slightest clue.

Blue Fury
07-18-2009, 06:18 PM
So in your opinion, are my 6 ohm tweeters blasphemy?

m3dia_lab
07-18-2009, 06:31 PM
im running cdt tw24 or 25s, they go nicely with the mpyres, thats what im using now with 300 watts going to each door lol

galacticmonkey
07-18-2009, 07:16 PM
I just like 8 ohm speakers because you can run a ton of them much easier.

Jared530
07-18-2009, 10:25 PM
i think im going to get some of these
http://www.madisound.com/catalog/product_info.php?cPath=45_229_324&products_id=8609

what amp are you running media lab?

ciaonzo
07-18-2009, 10:28 PM
If I may offer one last bit of input, since you seem to be able to go with a large format tweeter, you should look into getting one with a chambered back that allows for a lower resonant frequency. It will pay dividends down the line. It shouldn't tip the budget to far to get one.

Jared530
07-18-2009, 11:16 PM
If I may offer one last bit of input, since you seem to be able to go with a large format tweeter, you should look into getting one with a chambered back that allows for a lower resonant frequency. It will pay dividends down the line. It shouldn't tip the budget to far to get one.

can you link me to what you have in mind?

ciaonzo
07-18-2009, 11:41 PM
I'll just put up a couple as an example. Some will work better than others for different reasons.

Since you had a Morel listed:
http://www.madisound.com/catalog/product_info.php?products_id=8435

This one is a great value, sounds terrific.
http://www.madisound.com/catalog/product_info.php?products_id=792

This one is still my favorite even though off-axis response falls off a bit. Very good sounding driver.
http://www.madisound.com/catalog/product_info.php?products_id=1181

Can take a beating too. :p:
http://www.youtube.com/watch?v=RyGoi5mYRJ4&feature=channel_page

mcsoul
07-24-2009, 08:12 PM
oh noes... 8 ohm! all my speakers in the front are 8 ohmers. sux

Awe man you were tricked into buying 8 ohm drivers too:crap:
When will we get justice:confused: