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Multi-Way Conventional loudspeakers with crossovers

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Old 2nd September 2012, 07:15 PM   #2191
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Quote:
Originally Posted by DorinD View Post
The right channel as it looks now.
nice!
Have the same drivers. The woofer i will use is eminence gamma 15a2.
But i have the selenium and the eminence on top.
Where do you cross them?
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Old 3rd September 2012, 09:20 AM   #2192
DorinD is offline DorinD  Romania
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Hi Razvan,
nice to learn that you're using same drivers; I cross them at 500Hz and 5kHz.
Regards,
Dorin
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Old 9th September 2012, 04:50 PM   #2193
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Hiya. Long time - no post!
I just built myself some new monitors for my hardware synth studio. Nothing too posh, the only analog is a korg MS10.
I do PA rentals for a living, so not new to speakers, but I got fed up with constantly dragging bassbins & tops in & out of the house, or using other speakers & not being happy, so I built these. like a PA condensed into one box.
The bass cone is a 12" Ciare SW12.00, which I've always loved in reflex, but it's not really efficient enough for PA use.
The midrange is a 10"PHL cone, from France, that they modified for me to become a duel concentric cone, and built the connector piece, especially for the tweeter. It's a really tight midrange, with a flat foam surround, and xmax of less than 1mm. Important i think, for a duel concentric, as I reckon the cone modulation messes up the tweet. Flat surround might also minimize any edge diffraction stuff, but I'm only guessing.
10" cone up to 3KHz gets quite directional, but I reckon that's good, as it minimizes relections. ideal for monitoring.
The tweeter is one of the nitride coated titanium 1.4" compression drivers from 18sound in Italy. Above 3KHz, I reckon it's better than beryllium, and I used to run TAD4001's.

The box is bi-amped, so theres a substantial passive crossover in there between the mid & top. Separate mid compartment, of course.
The baffle is shaped to minimise edge diffraction, and provide a bit of a curve on the grill, to give it structural strength without the need for grill supports in the middle.
Flip handle on the top, and cut out with internal box at the bottom of the rear panel, for a comfortable carrying position.
M10 threads for hanging them off eye bolts, if required.
All analog processing & class AB amps.
I've loaded them up & tested them (very happy) and am now about to carpet cover them with Spectropile carpet (100% made out of recycled plastic bottles!) as I reckon that helps dampen panel resonance, and makes them un-scratchable.
Should be carpeting them tomorrow, so I'll put up some finished photos too.
The spectrum analyzer is showing the response of the ciare SW12.00 without any filters, on the Klarke Tekniks 'savage' setting of 1dB per LED.
nice curve with plenty of 40Hz, peak at 63Hz. the 250Hz 'lump' smooths off with the active 220Hz crossover point.
The other curve on the bassbox plot is an 18sound cone I tried, which is much louder, but not as subby, or smooth.
I'll be crossing it over at 200/220 odd. I'll put up the complete response & with mid & high when it's done.
Cheers.


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Old 11th September 2012, 05:37 AM   #2194
ahegyes is offline ahegyes  Romania
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Here is my latest project, 3 way with Scanspeak drivers:

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For more pictures and details click the link below (you might want to use google translate )
Divisa
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Old 15th September 2012, 09:36 PM   #2195
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Carpeting finished, & now the grills are done.
As is most of a bottle of wine
lovely.
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Old 16th September 2012, 11:31 AM   #2196
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Got some measurements now, too.
No EQ on the system.
all analog.
class AB amps.
1dB per LED:

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Old 16th September 2012, 05:02 PM   #2197
SunRa is offline SunRa  Romania
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@ahegyes,

Very nice job! Is the cabinet construction layered?
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Old 20th September 2012, 09:16 AM   #2198
ahegyes is offline ahegyes  Romania
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Yes - It is layered out off 25mm plywood.
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Old 20th September 2012, 09:20 AM   #2199
56oval is offline 56oval  Australia
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Quote:
Originally Posted by ahegyes View Post
Yes - It is layered out off 25mm plywood.
Me like very much ,I'm a bit partial to stacked ply construction .

Cheers
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Old 1st October 2012, 03:41 AM   #2200
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Default My 3-way nearfield speaker system

Tweeter: Scanspeak 9130 (formerly Peerless "HDS")
Mid: Seas M15CH002
Sub: Peerless XLS-12 830500

Monitor box from PE.
Sub box (great build, with brace) from avpriority@ebay.

Crossover via miniDSP 4x10:
LR4 100hz
LR4 2800hz

Amplifier: ATI 1506 6x150w

I sit on the floor close to the speakers and listen to classical music.
The soundstage produced by these monitors is incredible, you can easily locate the different sections of the orchestra, and it has enormous depth, as if you're sitting in the back of the hall.

This project hardly qualifies as DIY as all I did was drill, screw and config the software.
It just shows the beauty of the modern consumer world where anyone can build epic quality speakers with minimal skills.
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