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Old 18th April 2013, 03:37 PM   #961
chaparK is offline chaparK  Luxembourg
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Alright, looks like the storm is behind us now

Paal has found a bug, so I have posted a fix. Version 0.0.5 is now available for download, it's only a software update (firmware unchanged).

Changes:
- Bugfix: Phase inverts in IIR mode were not always properly stored into the preset. (Thanks Paal )
- Bugfix: The 'Show Unprocessed' checkbox on the graph tab was always disabled in IIR mode.
- As requested, there's now up to 24 dB gain on EQs.
- Up to -24 dB of attenuation in IIR mode so that you don't clip if you push the EQ gain high.
- Q factor now with 2 digits after decimal point.
- Lower frequency for crossovers now down to 10 Hz (instead of 20 Hz previously). This way you can (attempt to) protect your woofer (with a high-pass) if you add a lot of bass with a 24 dB shelf for example ...

Best,

Nick
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Old 18th April 2013, 11:00 PM   #962
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Quote:
Originally Posted by kazam View Post
Bohdan,

for the third time: Let's keep this thread about Najda.

Please post about phase-linearity in a dedicated thread.

/K

Hi Kazam,

No problem.

I do apologize for the disruption.


Best Regards,
Bohdan
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Old 20th April 2013, 01:43 AM   #963
Shaun is offline Shaun  South Africa
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Quote:
Originally Posted by Speedysteve7 View Post
Recently I have played two setups against each other:
1. Correction on the mid horn JBL2482 compression drivers
2. No correction.

In A/B test and blind tests (helper changing the setups with me having no idea what the starting point is), I clearly prefer them without any correction...
They sound is just less appealing and natural.

Now, I assume that the correction is pushing the the driver / horn combo to do work where out of their comfort zone and so it sounds less good.

Is it the way I am applying correction or just, you can't get things for nothing?

I do however like some correction on the bass channels. Perhaps it is a compression driver thing? Same thing with my upper mid Vitavox S2 drivers btw...
Have you had a look at what is happening off-axis? You may be creating peaks in the off-axis response that reach you via reflection. Also, make sure that you are not running out of headroom in Najda as a consequence of equalisation (boost).
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Old 21st April 2013, 01:00 PM   #964
paalj is offline paalj  Norway
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There where no space for the power. Have to build another box for that.
Nick, do you have a logo?

best,
Paal
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Old 21st April 2013, 01:17 PM   #965
chaparK is offline chaparK  Luxembourg
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Wow! That's very nice Paal!! Very very nice!!!
Have you also drilled the rear panel?

Something others will want to ask too: Where did you get these buttons?

For the logo, how about 'Paal Industries - Norway'?

(Power supply can remain out of the box. There's nothing wrong about that I suppose)
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Old 21st April 2013, 05:44 PM   #966
SAC is offline SAC  United Kingdom
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Quote:
Originally Posted by chaparK View Post
Power supply can remain out of the box. There's nothing wrong about that I suppose)
Would it be worthwhile keeping the power supply separate? Usually low signal boards are best kept away power supplies, as is the case here.
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Old 21st April 2013, 05:47 PM   #967
paalj is offline paalj  Norway
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Quote:
Originally Posted by chaparK View Post
Wow! That's very nice Paal!! Very very nice!!!
Have you also drilled the rear panel?

Something others will want to ask too: Where did you get these buttons?

For the logo, how about 'Paal Industries - Norway'?

(Power supply can remain out of the box. There's nothing wrong about that I suppose)
Thanks a lot.
The buttons 2 x Round Cap Power/Arrow/Set/OK Logo Tactile Push Button Switch Momentary Tact LED | eBay

Najda from behind: see attachment.
For the Logo. I'll have a look

best,
Paal
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File Type: jpg Najda 021.jpg (73.2 KB, 351 views)
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Old 21st April 2013, 07:05 PM   #968
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Originally Posted by paalj View Post
Thanks a lot.
The buttons 2 x Round Cap Power/Arrow/Set/OK Logo Tactile Push Button Switch Momentary Tact LED | eBay

Najda from behind: see attachment.
For the Logo. I'll have a look

best,
Paal
Great build, Paal!

Good to see another LX521 builder as well. What are your impressions so far? Have you built the ASP? Are you running full 4-way?

I'm tempted to get those buttons myself for my build which is now getting closer.

/K
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Old 21st April 2013, 09:28 PM   #969
paalj is offline paalj  Norway
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Quote:
Originally Posted by kazam View Post
Great build, Paal!

Good to see another LX521 builder as well. What are your impressions so far? Have you built the ASP? Are you running full 4-way?

I'm tempted to get those buttons myself for my build which is now getting closer.

/K
Hi kazam,
Thanks.
I had some hours of listening today and I still have goose bumps. The soundstage is even better than Orion. With some program material the soundstage is extending behind the front wall.
The LX is not finished yet, but is playable. I am in the middle of the adjustment phase (more exactly phase adjustment )
I have not built the ASP. I am not running full 4-way, but I am following your progress in another thread. My spare amp is standing here waiting..

You could maybe ask the button supplier to make a "menu" and "mute" button?

Good luck with your build!

best,
Paal
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Old 21st April 2013, 10:34 PM   #970
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Paal, there was a breakthrough yesterday so I can now generate biquad coefficients that replicate all the channels of the LX521.

Next I want to include a FIR block, minimum phase of course , in anticipation of individual driver variation compensation.
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