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Peerless 830860 5-1/4" PPB Cone HDS Woofer
I experiment with speakers a lot. My 4th project in recent months is 4 each 8 ohm GRS speakers.A Dayton factory made 2.5 k crossover and the phenolic ring tweeters.I plan to later replace the GRS with these. So if I wire the GRS ( Or these) parallel I set 4 ohms for the low range. The tweeter is 8 ohms.The 2.5 K crossover has a choice plug for 4 or 8 ohms. Will there be a problem? Should I get a pair of 4 ohm tweeters? I use extra drivers on other projects. Should I get a 3 K crossover?
As you are an avid DIYer - you should definitely experiment with your own crossovers - then the impedance won't matter... You can use a crossover calculator to get the values for the parts you need. As for choosing the crossover point - here's a easy rule of thumb. For simple crossovers - double the low end range of the tweeter. So if a tweeter claims 1500hz as the bottom of it's range - a good crossover point would be 3000hz. Then you need a woofer to go with that. Half the high end of the woofers response. So if the woofer goes up to 6000, then 3000 would be a great spot for it as well. These are very general guidelines - but can get you into the ballpark of matching drivers and determining general crossover points. As an experimenting DIYer - you should have some fun with this. I keep a pile of capacitors and inductors around for experimentation, along with a few L-pads to compensate for the usual higher efficiency of the tweeter... Experimenting helps and once you find the right values - you can use poly caps and air coils... Listen to you favorite music tracks and note the difference when you make changes - this is what we call "voicing" a speaker. Have fun.
Date published: 2013-02-03