4ohms and 8ohms speaker drivers

[bng]

I still new to this speaker building. I have finish and built my 3-way design speakers and now I want to start building another one. This time, I want to built something bigger.

Right now, I have these speaker drivers in 8ohms.

pair Dyaudio T330D
pair ScanSpeak 18W/8531G00 mid-woofer
four ScanSpeak 22W/8857 woofers

I want to add in a ScanSpeak 12m/4631G midrange driver but it is a 4ohms driver.

The speakers will be driving my a Krell FPB-300c amplifer.

Since all my drivers are 8ohms and now i am adding a 4ohms driver in the crossdriver.

Will the speakers works and will the amplifer still be able to drive all the speakers without something going wrong or blow up?

[Cal Weldon]

Hi Brian,

It might not blow anything up but you can't just swap drivers around. Unless the new mid happens to be about 3dB more efficient than the existing and you add 4 ohm series resistance, but even that isn't all there is to it. If the other drivers are matched and properly XO'd then I would think about a new project rather than substituting. Is this your project from '02?

http://www.diyaudio.com/forums/showt...6114#post26114

[bng]

great info. Thanks Weldon. I will use another alternative midrange driver with a 8ohms rating.

btw: I did not able to get a chance to find the dynaudio woofers at that time. Instead I used a scan speak woofers. That was my first speaker project date back in 2002. Took me almost a year to built the speaker.

now i am doing a second speakers and this one might just as well take me about that time or lesser given the experience from the first.