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description: Audio advice and discussions with audiophiles and professionals. Free discussion forums, open to all and frequented by industry experts. Ask questions and get advice on stereos, speakers, hi-end amplifiers, pre-amps, home theater, tube hi-fi, turntables, vinyl, tweaks, music, films, video, DVDs and more.
items: 1-PI x-over???
items: Re: 1-PI x-over???

1-PI x-over???
type: item
description: how much spl does the 10 ohm resistor knock off ? like 2 db ? Thanks!!!
creator: Wayne-o
date: 2008-07-18T00:52:35-00:00

Re: 1-PI x-over???
type: item
description: There is no 10Ω resistor in the one π loudspeaker. There is a 16Ω resistor, but it's in parallel with the tweeter so it doesn't attenuate it. The shunt resistor provides a little bit extra damping, and works sort of like a Zobel. The tweeter has a 12Ω impedance peak at 650Hz and this resistor reduces that peak. Without it, more low frequency energy than wanted would be developed across the tweeter.
creator: Wayne Parham
date: 2008-07-18T03:47:59-00:00

Re: 1-PI x-over???
type: item
description: OK ,its a 16 ohm thats what the diagram said but it had a 5 uf. capacitor and we are supposed to use a 10uf ,is that correct? Thanks.
creator: Wayne-o
date: 2008-07-18T08:29:50-00:00

Re: 1-PI x-over???
type: item
description: The crossover capacitor used in the one π and two π loudspeakers is 10uF, that's right. I made a prototype with a different tweeter having 8Ω average impedance, and I think I may have inadvertently sent that schematic out for a while. If you got the wrong schematic, I apologize. The crossover for the DX25 has a series 10uF capacitor followed by a 16Ω shunt resistor.
creator: Wayne Parham
date: 2008-07-18T17:36:34-00:00