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Suitable mid-hi-speaker for HD215

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Kalle View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Kalle Quote  Post ReplyReply Direct Link To This Post Topic: Suitable mid-hi-speaker for HD215
    Posted: 17 April 2006 at 12:21pm
Hi everybody!


I currently have a set of speakers (2 bass bins, 2 mids and 2 tops) with following elements:

4x RCF L15/554K (two elements per bass bin, reflex cabinet) as basses
2x RCF L12P110K (one element per side, closed cabinet) as mids
2x RCF N850 (one driver with a horn per side) as tops.



I'm thinking of building 2 HD215's using the abovementioned bass elements. Now I'm wondering if anybody here has any good tips on suitable mid-top-cabinet plans to cover the frequency range from 180hz and upwards, and where I could use my existing mid-elements and drivers?



The specs for RCF L12P110K are as follows:

GENERAL SPECIFICATIONS
Nominal Diameter 300/12 mm/inch
Rated Impedance 8 Ohm
Program Power 1000 Watts
Power handling capacity 500 Watts
Sensitivity 1W, 1m 101 dB
Frequency Range 60-2000 Hz
Effective Piston Diameter 260/10.2 mm/inch
Maximum Excursion Before Damage 48/1.9 mm/inch
Minimum Impedance 7.6 Ohm
Voice Coil Diameter 100/4 mm/inch
Voice Coil Material Copper    
Voice Coil Winding Depth 10.5/0.4 mm/inch
Number of layers 2    
Kind of layer Outside    
Thickness Top Plate Depth 9/0.35 mm/inch
Cone Material No pressed pulp    
Cone Design Curved    
Surround Material Polycotton    
Surround Design M - roll    

(More information available from RCF's website: http://www.rcf.it/VediMacro.phtml?IDMacro=1633&m1=1& m2=1&m3=1_1_4)


And specs for RCF N850 are as follows:


GENERAL SPECIFICATIONS
Exit Throat Diameter 50.8/2 mm/inch
Rated Impedeance 8 Ohm
Power handling capacity continuous program (above 1.2 kHz) 180 Watts
Power handling capacity AES (above 1 kHz) 90 Watts
Sensitivity 1 W, 1 M, on axis, on horn 109 dB
Frequency Range 500-20000 Hz
Diaphragm Material Pure Titanium    
Suspension Material Mylar    
Suspension Design Radial    
Minimum Impedance 8.8 Ohm at 3500 Hz    
Voice Coil Diameter 74.4/3.0 mm/inch
Voice Coil Material Edgewound Aluminium    
Voice Coil Former Design Straight -Kapton    
Number of layers 1- Outside    
BL Factor 12 T - m
Flux Density 1.85 T
Phase Plug Design 3 slot    
Phase Plug Material Composite    
Magnetics Ceramic    
Voice Coil Demodulation Copper ring    

(More info from RCF's website: http://www.rcf.it/VediMacro.phtml?IDMacro=1646&m1=3& m2=0&m3=3_0_0)


If anyone has any good advice on this, I'd be really grateful


Cheers,

Kalle!


Edited by Kalle - 17 April 2006 at 12:22pm
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ceharden View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ceharden Quote  Post ReplyReply Direct Link To This Post Posted: 17 April 2006 at 12:56pm
I would buy another two of the 12" drivers and build something similar to an X12.    Tune the cabinet high (~100Hz) to gain efficiency.  You'd probably be able to run around 2kW into per pair 12" drivers. 

That compression driver looks very nice. Put it on a large horn with good dispersion control and cross over actively around 1-1.2kHz.  I'd prefer to mount the horn between the two drivers for better midrange coherence.

You may find that 2x HD15's are a bit sub-light but a single 18" bandpass on each stack would soon solve that.
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mykey View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mykey Quote  Post ReplyReply Direct Link To This Post Posted: 17 April 2006 at 1:44pm

i have some nice 2x12'' fibreglass mid horns on the go at the mo

they would go with hd215's



Edited by mykey - 19 April 2006 at 8:10am
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Kalle View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Kalle Quote  Post ReplyReply Direct Link To This Post Posted: 24 May 2006 at 8:46pm
Originally posted by ceharden ceharden wrote:

I would buy another two of the 12" drivers and build something similar to an X12.    Tune the cabinet high (~100Hz) to gain efficiency.  You'd probably be able to run around 2kW into per pair 12" drivers. 



Do you have any advice on where I could find designs that are "something similar to an X12" for the mentioned drivers (RCF L12p110K)? I believe that using the drivers in the X12 cabinet wouldn't work 100% (?), and I don't quite know how I should modify the cabinet design so that it would be optimal for my drivers..

Could anybody give any advice on this?



Regards,

Kalle!


Edited by Kalle - 24 May 2006 at 8:47pm
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Kalle View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Kalle Quote  Post ReplyReply Direct Link To This Post Posted: 24 May 2006 at 8:48pm
Originally posted by mykey mykey wrote:

i have some nice 2x12'' fibreglass mid horns on the go at the mo

they would go with hd215's



You've exceeded your private message space quota, so I'm asking you in public. What would the price be for those?


Cheers,

Kalle!


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