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Multi-Way Conventional loudspeakers with crossovers

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Old 27th November 2003, 12:00 AM   #1
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Location: Portland, OR
Default Help a Newbie Please

I've got several questions. My plan is to use 8 BG Neo 8's (4 per side) or a BG RD50 for the mids. Subs will be VMPS. I'll need a midwoofer though to cross over to the planars at about 600hz.

1. If I use the Neo 8's how do I get the impedance to not go down too low for the amp?

2. Would the new PDR series Neo 8 be better?

3. What crossover slope and what crossover would be easiest to use. I want a good quality crossover throughout. Possibly something that I can control the levels of the various drivers with. (a problem we'll get to after step 1)

4. Is a dipole better or should I damp the back wave of the NEO's. I've read something regarding comb filtering when used as a dipole. Can the baffle be wide enough to not worry about this?

5. What's a fast midwoofer that will go down to 80hz? I'm inclined to go with a 10". Hundred bucks a side for this.

6. What tweeter would be best? I think a Raven or Raven clone would be good. Also a line array of tweeters gets expensive fast and is much more work.

This is all for now. Obviously my knowledge is quite limited. This speaker is to sound outstanding when I'm done and any help is appreciated. I'm sure I'd get myself into trouble, still may do so, without alot of research. Please note my woodworking skills are not the best so the design must be simple. Thank You
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Old 27th November 2003, 11:32 PM   #2
Ken L is offline Ken L  United States
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Default Re: Help a Newbie Please

Quote:
Originally posted by warnerwh
Obviously my knowledge is quite limited. This speaker is to sound outstanding when I'm done ..... Please note my woodworking skills are not the best so the design must be simple. Thank You
You really need to go to Madisound, zalytron, Parts Expresss, Speaker city, Adire or one of the many sellers of kits -

Jim griffin who posts here sells a line array kit if you're interested in line arrays - as do others

They've got all the answers worked out for you -

the crossover alone is far too complicated to do on your own - and for someone to help you step by step would require a tremendous amount of knowledge and effort to get right.

It may seem easy, but these are things that are difficult to do from scratch.

Build some kits, learn as you go, and in a few years you'll have learned more.

If you really want it to sound good you need to build a kit or someone's complete design - and if you want it to look good, definitely.

regards

Ken L

PS I built some kits from Madisound and am very glad I did. They sounded great and looked good.
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Old 28th November 2003, 12:26 AM   #3
jleaman is offline jleaman  Belgium
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Default Re: Re: Help a Newbie Please

QUOTE

Ken L

PS I built some kits from Madisound and am very glad I did. They sounded great and looked good.

let me see then.!!!
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Old 28th November 2003, 02:43 AM   #4
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Thank you guys for the input. Does someone sell a line array using the BG ribbon drivers? I'm not sure why the crossover should be so hard if I have one that I can adjust frequencies and driver levels. Please elaborate. The only kits I know of are from VMPS and GR Research that use the planar drivers. Don't believe Madisound has one that I'd be interested in. I've already built a VMPS design. My main concern is actually the wiring of multi 4 ohm panels to get the desired load for the amp.
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Old 28th November 2003, 01:05 PM   #5
Ken L is offline Ken L  United States
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Default Re: Re: Re: Help a Newbie Please

Quote:
Originally posted by JasonL
QUOTE

Ken L

PS I built some kits from Madisound and am very glad I did. They sounded great and looked good.

let me see then.!!!
Sorry, I sold them to my son and don't have a digital camera.

However, what I built was the Scan-Speak Solist - illustrations at

http://www.madisound.com/solist.html

I bought them with the upgraded crossover and thoroughly enjoyed them.

Regards

Ken L
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