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Old 30th September 2005, 06:23 PM   #11
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BTW forget about the wave guide and the low XO point.

Go with a Volt BM220.8 and a Fostex FT7RP ribbon.

Its what I'd do if I wanted a 2-way floorstander with superb bass.

EDIT: Forget that its more like 400Euros for those two.
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Old 30th September 2005, 06:30 PM   #12
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You're asking a lot from a tweeter to run that wide of a frequency range. Tweeters of that quality are not inexpensive. Additionally you'll need to use very steep crossovers if you're trying to take the tweeter all the way to the bottom of it's useful range. 200 Euro for 2 tweets, 2 woofs and crossovers, etc.? That's a tough one. Perhaps a BG ribbon with a woofer?
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Old 30th September 2005, 07:13 PM   #13
Dumbass is offline Dumbass  British Antarctic Territory
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If I wanted a 2-way system with excellent bass, I'd use Jordan JX92S and NHT 1259 each in .7Q sealed cabinets, biamped.

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Old 30th September 2005, 08:17 PM   #14
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Right now if I was looking at a 2 way with bass and punch I'd be looking at pro 15's ported with a fullrange 12" / 10" / 8".. crossed around 200 - 300Hz.

How bigs the room ?


Rob.
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Old 1st October 2005, 07:04 PM   #15
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The room is Around 20m2
Compared to a TL design a vented one has some more punch!
I Want an 8" not a pro 15"!

The 40% tax, I was talking about transport, taxes, and tip!
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Old 1st October 2005, 10:27 PM   #16
AJinFLA is offline AJinFLA  United States
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http://www.seas.no/seas_line/tweeters/H1212.pdf

http://www.seas.no/Basic%20Basser%20...X-H1288-08.pdf

My suggestions.
Prices in Euros???????



Cheers,

AJ

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Old 2nd October 2005, 01:46 AM   #17
azrix is offline azrix  United States
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Pretty much any 7" or 8" woofer (even a few 10"ers) will work with the 1k-1.5k crossover frequency that most waveguides can give you. A bigger problem is the waveguide. Do you have a plan for that? Cutting a waveguide out of a piece of wood, like Amphion does, is not trivial and neither is the shape of the waveguide. There are a few waveguides available retail, but I don't know how easy they'd be for you to get a hold of. Once you do have a good waveguide and tweeter, the crossover needed to get the frequency response close to flat is much more complex than if you hadn't use a waveguide. You could get drivers for a decent three way with your budget. That's probably what I'd be looking at.

http://www.zaphaudio.com/hornconversion.html has some info.
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Old 2nd October 2005, 05:07 PM   #18
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Why not go with a device which will actually work properly in a wavegudie in the first place? If the taxes are only so high for Europe, Bulgaria produces some quality comrpession drivers, BMS amongst them where Seas et al will have no chance against on a waveguide.

I myself am embarking on on a waveguide project, but for a 12" driver crossed around 1.2khz (forget about a dome tweeter having any chance there) and the woodwork seems like the biggest challenge for me atm. A solid solid piece of hardwood will warp and crack if you don't really know what you're doing and laminated kiln-dried wood is likely the best bet I recon.
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Old 2nd October 2005, 07:31 PM   #19
Notax is offline Notax  Montenegro
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Quote:
Originally posted by Alexnick
Come on guys!
Any suggestions for the 8" and the tweeter?
Let's say you had 200 Euros(excluding the 40% taxes that I have to pay to get the speakers) what would you buy?

Monacor SPH-200KE and DT-28N.

36-42 liter, BR

X-over: 6/12 dB
bass (in fase) - 1,8 mH
tweeter (in contra fase) - atenuation; paralel 6,8 Ohm, in order 5,6 Ohm, in order 6 uF, paralel 0.39 mH

good luck
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Old 2nd October 2005, 08:14 PM   #20
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I'm with AJinFLA on this:
Quote:
http://www.seas.no/seas_line/tweeters/H1212.pdf
You need the metal dome.

I also agree on the midbass he suggests. An alternate to the SEAS midbass he cites would be the PE RS180. The SEAS would be more economical for you due to shipping and customs. Maybe better quality. The reverse holds true for those of us across the water.
Quote:
Posted by asrix: Cutting a waveguide out of a piece of wood, like Amphion does, is not trivial and neither is the shape of the waveguide
I agree here. Let's do it in spite of this. I can make your waveguides on my lathe. I can also shape the 30 ppi foam "refractive phase plug". You may have an alternate approach.

See my thread: Acoustic Waveguide
for formulas. There needs to be a routine developed that will plot full scale profiles from entered data: throat size, cut-off frequency, desired transition radius from waveguide to baffle, etc. Once the profile is graphically described we can get on to making them.

Yee Ha!
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