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Multi-Way Conventional loudspeakers with crossovers

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Old 17th May 2006, 10:27 AM   #21
inrank is offline inrank  United Kingdom
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sounds good, but what actually is a 0.5 way?

thanks
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Old 17th May 2006, 01:46 PM   #22
sreten is offline sreten  United Kingdom
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Quote:
Originally posted by inrank
sounds good, but what actually is a 0.5 way?

thanks

Strictly speaking its a 1.5 way.

One driver is full range, the other (usually the lower) is rolled off in the midrange.

This gives full (6dB) baffle step compensation for free space positioning.

And the same frequency balance as a full range bipole.

/sreten.
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Old 17th May 2006, 01:49 PM   #23
inrank is offline inrank  United Kingdom
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ok, so i buy two WR125S's and what components will i need for the crossover and what is the crossover point, ive never made one before.
i take it ill be going for a sealed 22L ish cabinet?
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Old 17th May 2006, 01:52 PM   #24
tinitus is offline tinitus  Europe
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Maybe it should read 1.5 way

When I suggested the "bipoles" it was because its designed fore two driwers - and I had the formerly suggested in mind - 2 x WR125 fore bass and lower midrange only, AND a FR125 for lower midrange and up - in this case I its ok with all driver on front
- AND WR125 is made in 16 ohm at a little higher cost though.
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Old 17th May 2006, 02:03 PM   #25
inrank is offline inrank  United Kingdom
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so this...

Click the image to open in full size.

that apeals a lot to me, from a cool idea and a design point of view.

what kind of efficiency will they be?
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Old 17th May 2006, 02:28 PM   #26
sreten is offline sreten  United Kingdom
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Hi,

do you want a 2 way - with 1x FR125S and 2x WR125S per side ?

or do you want a 1.5 way - with 1x FR125S and 1x WR125S per side ?

For both cases the crossover point will be set by baffle width.

Efficiency for both cases will be identical - 86dB.

Power handling for both cases will be not that different.

For the 1.5 way you need a series inductor for the WR125S.

For the 2 way I'd suggest a series first order crossover.

/sreten.
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Old 17th May 2006, 02:31 PM   #27
inrank is offline inrank  United Kingdom
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i would prefere-

with 1x FR125S and 2x WR125S per side (should that be 2x WR125ST?)

and thinking for a baffle width of 200mm, or can i make then wide and thin?

will this (being driven by a Primare A20 60WPC) give a 'big' and dynamic sound?
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Old 17th May 2006, 02:55 PM   #28
tinitus is offline tinitus  Europe
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"wide and thin" - I like that, maybe 400-500mm

Your "dappolito" suggestion - well, you get a higher box, FR125 should be be in level with your ears - and constuction gets complicated and not present identical load to both woofers

I would prefer woofers(WR125) together and FR125 on top
Then If you "tilt" kabinet you will get a nice phase allignment

8 or 16 ohm WR125 version - good question

Series crossover - I know nothing about that - hard to "tweek"
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Old 17th May 2006, 02:57 PM   #29
inrank is offline inrank  United Kingdom
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i need to have another look at my room for next year at uni, see wether the 'wide and thin' design would fir, i think it will be better than 'thin and deep' as i will be able to place them closer to the wall.

i think i would prefere to have the FR in the middle of the WR's for better imaging and looks lol

wide and thin- 300mm wide, 900mm tall and 150mm deep gets 30L roughly, or same but 100mm deep makes 20L.
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Old 17th May 2006, 03:06 PM   #30
tinitus is offline tinitus  Europe
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You should not use the entire height for internal box volume - you risk a nasty resonanse - better make it a bit deeper and fill bottom with sand

8 or 16 ohm WR125 -

with 2 x 8 ohm i paralel = 4 ohm you will probably get a bit "heavy" sound - but with a sealed box it might be ok
Advantage is that inductor will be smaller

with 2 x 16 ohm sound will most likely be more precise and present an easy load to amplifier
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