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29 Search Results Found |
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Forum: Pi Speakers «»
Posted on: Mon, 06 May 2002 21:23 «»
By: Wayne Parham
Re: L-pad calculator
That's a cool program - Very useful! I like how you have the three configurations: 1 - Standard L-Pad, 2 - Series/Parallel compensation attenuator, 3 - Series compensation attenuator.Are you up to adding functionality for an optional bypass capacitor acr...
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Forum: Pi Speakers «»
Posted on: Mon, 15 April 2002 15:00 «»
By: Wayne Parham
Re: crossover design... help....
>> thank you very much for your reply... now, how do i know for which>> frequency i should compensate? i must look at the response graph,>> don`t i?That's right, yes.>> if i place a l-pad to pad down the driver, the high octaves are>> padded as well?That's...
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Forum: Pi Speakers «»
Posted on: Mon, 08 April 2002 14:31 «»
By: Wayne Parham
Adding resistance changes system peaking at resonance
Using an L-pad in the woofer circuit will change its damping. The added resistance will act like Res and Qes are higher. The woofer and its cabinet form an acoustic filter, which works just like an electronic filter, and resistance changes filter Q. Ser...
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Forum: Pi Speakers «»
Posted on: Sun, 07 April 2002 16:51 «»
By: Wayne Parham
Compensation components require specific R1 and R2 instead of an L-Pad
The crossover filter sections would probably be fine, but the L-Pad isn't. The ratios of R1 and R2 provide specific damping for the filter that gives the response curve we're looking for when we use compression horn tweeters, and using an L-Pad doesn't al...
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Forum: Pi Speakers «»
Posted on: Tue, 12 February 2002 16:07 «»
By: Wayne Parham
Re: "Pi Pad" implemented with series xover
Some people like having an L-Pad or other adjustable control on their loudspeakers. Personally, I don't like them, because they change the crossover and compensation network's electrical filter characteristics. I prefer the user who wishes tone control t...
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Forum: Pi Speakers «»
Posted on: Sun, 18 November 2001 14:12 «»
By: Wayne Parham
Lpad's provide incorrect damping for the network
Don't use a standard 8 ohm L-Pad because damping is wrong for the compensation network. Use the suggested R1 and R2 components instead.
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Forum: Pi Speakers «»
Posted on: Thu, 15 November 2001 01:09 «»
By: Wayne Parham
Re: 3 Way Seven Pi crossover, with JBL CS3115 Parts
Nice parts, I think you can make very nice sounding seven Pi speakers with them!Of course, building a crossover isn't entirely trivial, but some generalities are in order. The lower the midrange to woofer crossover point is made, the more distance can be ...
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| 8 |
Forum: Pi Speakers «»
Posted on: Mon, 08 October 2001 20:32 «»
By: Wayne Parham
Re: Compensation components w/ 6db slopes?
I would not recommend a variable L-Pad, but would recommend a series/parallel attenuator using fixed value resistors. Put an HF augmentation capacitor across the series resistor.The network I use in my speakers will work for you, using values R1=16 ohms, ...
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| 9 |
Forum: Pi Speakers «»
Posted on: Sat, 08 September 2001 16:11 «»
By: Wayne Parham
L-Pads
L-Pads don't work as well in this application because they don't provide the proper load to the splitter filter for what we need in a compensation circuit. If we weren't building in EQ for the driver's power response, an L-Pad would be fine. But to make ...
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