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Multi-Way Conventional loudspeakers with crossovers

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Old 29th April 2011, 04:13 PM   #11
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Hi Peter,

The system is for stereo. The 4 pcs 18" drivers have more than enough headroom I think - so why not tune them low?
I assembled the front boxes today, but I don't have more time for fun today...

I will probably have first impressions tomorrow.

Robert GS
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Old 30th April 2011, 04:42 PM   #12
pk is offline pk  Denmark
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Quote:
Originally Posted by Robert GS View Post
Hi Peter,

The system is for stereo. The 4 pcs 18" drivers have more than enough headroom I think - so why not tune them low?
I assembled the front boxes today, but I don't have more time for fun today...

I will probably have first impressions tomorrow.

Robert GS
Hi Robert,

Thanks for your reply. I will be following the thread:-)

Best regards
Peter
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Old 1st May 2011, 09:10 PM   #13
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Default Initial test – testing the connections

I did make the initial connections test yesterday. A simple setup was created with crossover points at 80Hz, 400Hz & 2kHz. All drivers and amplifiers were connected correct – so that was a good start. I also listen to the setup for a while, but I didn’t like what I heard – the system sounded awful.

This is how the initial simple setup looks like:

Click the image to open in full size.

But don’t despair it got better later yesterday – I will make a little report tomorrow… time to go to bed

Just one more picture:

Click the image to open in full size.

Stay tuned - thanks Robert
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Old 2nd May 2011, 08:07 AM   #14
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Click the image to open in full size.
No wonder it didn't sound good, you've got the speakers in the wrong position!
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Old 2nd May 2011, 08:54 AM   #15
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Originally Posted by ShinOBIWAN View Post
No wonder it didn't sound good, you've got the speakers in the wrong position!


Ahhhh ha ha - they were placed like this at the initial connection test:

Click the image to open in full size.

It's a bit better this way
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Old 2nd May 2011, 09:02 AM   #16
_henry_ is offline _henry_  Australia
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hi robert,

i believe the position compromise the sound. if u moved the speaker next to it, and move forward by 20-30cm, i'll bet will improve.

just my 2˘

cheers
henry
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Old 2nd May 2011, 09:44 AM   #17
CCU is offline CCU  Denmark
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Why haven't you countersunk the drivers?

But damn the look impressive
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Old 2nd May 2011, 10:54 AM   #18
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Originally Posted by _henry_ View Post
hi robert,

i believe the position compromise the sound. if u moved the speaker next to it, and move forward by 20-30cm, i'll bet will improve.

just my 2˘

cheers
henry
Well - it wasn't the placement - I am used to have a pretty smooth response from my loudspeakers

Just making some crossover points on drivers that measures like this will not make me happy.

Click the image to open in full size.

As I mentioned in an earlier post it got better later that day. I made a quick setup (15min including measurements) based upon measurements of the horn, mids, and basses, but I was too lacy to measure sub as only one sub is finished. This is the frequency response of that setup (simulated and it will measure like this, if I had made a measurement).

Click the image to open in full size.

The one sub is only crossed at 70Hz (no EQ) and does a formidable job placed in the corner. It will most likely be much better when both subs are up and running. I have had a customer round for a listen and he was very impressed at this early stage.

I am pretty happy already
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Old 2nd May 2011, 11:02 AM   #19
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Quote:
Originally Posted by CCU View Post
Why haven't you countersunk the drivers?

But damn the look impressive
Thanks

The boxes ain't finished - this is only the initial testing. The real front piece isn't mounted yet - both the front boxes and the subs will have an extra front, when I have time for it. Actually I also ran out of damping material - so the 10" driver enclosures has a minimum and the one sub has no damping at all
BUT the system already sound incredible
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Old 2nd May 2011, 11:40 AM   #20
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I support Robert's statement about the incredible sound! -I heard the system yesterday and at a point, I was in doubt whether it was the building or the drivers, which was the moving part.... This system in a 40 Sqm living room will be able to generate whatever sound you would like at whatever level you would wish...
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