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Old 26th September 2012, 05:14 PM   #51
Veke76 is offline Veke76  Finland
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Quote:
Originally Posted by Veke76 View Post
I'll make a cable with R1=10kohm R2=10kohm ratio will be 2:1. I'll report back here if I get this right.
With new cables gain ends up 11 o'clock position to play at balance. Ratio is actually 1:1!! Sub input takes some volts but I believe at full power it will overdrive/damage. Strangely the balance is what I wanted so this is some sort of progress.

Eminence Lab 15 and Hypex DS8.0 is ok combination now that i found out how to tweak out more oomph.
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Old 6th November 2012, 10:24 AM   #52
Veke76 is offline Veke76  Finland
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The acoustic problems in the room were so annoying so I bought Anti-Mode 8033 S-II.
It took automatically six freq sweeps...it lasted for ages.
The sound is bit quiet now. I think those peaks are now flattened and I can hear some new sounds which were hidden under.

The input signal to antimode clipped with 1:1 cables so I'll try 1:10 cables or I'll make new cables with adjustable ratio.
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Old 3rd December 2012, 12:12 PM   #53
Veke76 is offline Veke76  Finland
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Default Eminence LAB 15 + Hypex DS8.0 sealed box

Here are current freq sweeps of my room with LAB 15 + Anti-Mode. Difference with AM ON/OFF and one sweep with higher volume.
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File Type: png Screenshot from 2012-12-03 14:59:33.png (75.8 KB, 220 views)
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Old 4th December 2012, 01:38 PM   #54
Veke76 is offline Veke76  Finland
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Default Eminence LAB 15 + Hypex DS8.0 sealed box

Freq sweeps how loud it will go. Sweeps approached maximum with red line.
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File Type: png Screenshot from 2012-12-04 16:29:07.png (72.3 KB, 204 views)
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Old 14th December 2012, 09:38 AM   #55
Veke76 is offline Veke76  Finland
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Default Lab 15 + alternative enclosures

Now that I've have my sealed sub working I've got interested in TH and TQWP enclosures. How an upgrade to these enclosures might work. Basically I need 100 dB@1W and max spl 125 dB. Is it even possible with Lab 15? Enclosure could be 60x60x60cm cube or tall 50x50x120cm for example. What I measured from sealed Lab 15 I've got some corner room gain. So hopefully freq will extend low as 20 Hz in room.

40Hz TH

3015lf TH @ 35-40hz but only 20" deep help

15" kicker l7 30hz box design help !!

Single sheet TH challenge

THAM15 - a compact 15" tapped horn

Cubo15
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Old 14th December 2012, 01:37 PM   #56
tb46 is offline tb46  United States
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Location: Texas
Hi Veke76,

To get down to 20Hz you'll need a large TH (I ended up with some simulations @ 340/390 L that looked promising), maybe something along the lines suggested by bjorno would work (MLTL), see: Posts #7/#9 here: Lab 15 design suggestions for HT use?

Regards,
__________________
Oliver

Last edited by tb46; 14th December 2012 at 01:43 PM.
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Old 14th December 2012, 03:16 PM   #57
Veke76 is offline Veke76  Finland
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Thanks I forgot that thread existed. I'll post there what I had in mind
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Old 14th December 2012, 04:36 PM   #58
Veke76 is offline Veke76  Finland
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Well I need F3 30-35Hz design. Usually with WinISD I try to hit F15 @ 20Hz. Seems that room gain adds up that much so that equals F3 point (in room).
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