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Post by MartinT on Feb 10, 2016 13:17:22 GMT
Blimey, you need some case headroom!  |
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Post by speedysteve on Feb 10, 2016 13:25:35 GMT
Only 4 cms  |
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Post by John on Feb 10, 2016 16:03:33 GMT
Keep us updated how it performs Steve
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Post by speedysteve on Feb 10, 2016 23:50:59 GMT
Yes will do. I just opened my Nadja case to check how much clearance I have for the Burson's. I haven't opened it since doing the WaveIO, must be 1.5 years ago. Yikes that means my Najda has been in service 3 years! Loved every minute of using and listening to it. There really is no substitute to multi channel all singing all dancing DSP X/O's if you are managing multi way, esp. in a system that's under development or evolving due to curiosity . I remember mounting the board not exactly low in the case, but I used a full height / width case. Ah plenty of room, have 5cms above the existing IC Op-amps. So with those out it will be about 5.5cms. Fellow Burson adopters' have recommended some vent holes in the top as the Bursons get warm. I have already checked and my PSU has the beans to power them, all 6 of. I think I will fit a dedicated PSU for the WaveIO USB to I2S converter too. I've been meaning to do it and have been slumming it using the lazy option of +5v 500mA from the Laptops USB supply. Not the cleanest supply I guess. Whilst I can't say I'm not happy with the existing excellent SQ, any low hanging fruit should be picked. I'll do this separately to the Bursons to ensure I can evaluate each change. Much a to do! |
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Post by MartinT on Feb 11, 2016 7:27:54 GMT
I think I will fit a dedicated PSU for the WaveIO USB to I2S converter too. I've been meaning to do it and have been slumming it using the lazy option of +5v 500mA from the Laptops USB supply. Not the cleanest supply I guess. The I 2S converter will be very sensitive to the +5V rail quality. I suggest you use a very low noise shunt regulator in this position? For instance, the Tentlabs modules are <50nV/SqrtHz. |
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Post by speedysteve on Feb 13, 2016 15:04:13 GMT
Yes. That sounds good.
I'm running it off the +5v from the Najda supply at the moment.
Def better, cleaner more distinction.
I've also got a plug in one that I must try.
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Post by speedysteve on Feb 15, 2016 14:44:55 GMT
I briefly tried the plug in one. It's an unknown at to what the noise level is, it was for medical equipment originally, might be good, might not:)
The ears tell me it's ok, early days for it evaluation wise.
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Post by speedysteve on Feb 17, 2016 19:14:42 GMT
Here us a single Burson V4 vs 2 of the Najda supplied IC op-amps.  Here is the full compliment of pimped op-amps installed.  they were easy to fit. Wouldn't it be nice if all 'upgrades' were this easy. I then settled back to listen. Burson give their builds 50hrs burn in and a 'lifetime' warranty. Once the system had warmed up I listened in earnest. My initial thoughts were - Richer more composed, just as much info as before, cleaner. More bass?! (or am I tolerating a higher volume setting? Very impressive sound indeed. I don't need more bass - can always attenuate the tapped horns by a dB or fraction is needed. One older track I found showed up some distortion noticeable on some not so well recorded tracks... This was also pointed out the TNT a reviewer of these op-amps. www.tnt-audio.com/accessories/burson_supreme_e.htmlHeard it through the grape vine did it but so bad it was un-listenable at all - just one feature of the music / playback that I'd not heard before... I've not tried the analogue input stage yet. On a high just now |
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Post by MartinT on Feb 17, 2016 20:03:50 GMT
Big buggers, aren't they? You're so lucky with the spacing! Now give that I 2C converter the clean 5V it needs and it should sound better still |
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Post by John on Feb 17, 2016 20:15:01 GMT
Great that the mods are working so well
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Post by speedysteve on Feb 19, 2016 13:22:15 GMT
I'll be wowing youngest daughters new boy friend with the wall of sound / delicacy of it all soon:)
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Post by MikeMusic on Feb 19, 2016 13:23:57 GMT
Look out you might find the relationship between you and he is stronger than youngest daughter ! |
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Post by Sovereign on Feb 19, 2016 14:49:49 GMT
Here us a single Burson V4 vs 2 of the Najda supplied IC op-amps.  Here is the full compliment of pimped op-amps installed.  they were easy to fit. Wouldn't it be nice if all 'upgrades' were this easy. I then settled back to listen. Burson give their builds 50hrs burn in and a 'lifetime' warranty. Once the system had warmed up I listened in earnest. My initial thoughts were - Richer more composed, just as much info as before, cleaner. More bass?! (or am I tolerating a higher volume setting? Very impressive sound indeed. I don't need more bass - can always attenuate the tapped horns by a dB or fraction is needed. One older track I found showed up some distortion noticeable on some not so well recorded tracks... This was also pointed out the TNT a reviewer of these op-amps. www.tnt-audio.com/accessories/burson_supreme_e.htmlHeard it through the grape vine did it but so bad it was un-listenable at all - just one feature of the music / playback that I'd not heard before... I've not tried the analogue input stage yet. On a high just now I was speaking to Ritch on the wam, he mentioned how good there replacement op amps are |
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Post by speedysteve on Feb 19, 2016 16:38:06 GMT
Yep Ritchie has them.
there's several of us who have them now. As one of the earliest builders of Najda I think I was one of the slowest to feel the need to mod it...
It really is that good out of the box.
But things can usually be improved, slightly.
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Post by speedysteve on Feb 20, 2016 17:13:42 GMT
Well, the boyfriend liked my system and the sound it makes.
More listening today. He's requested Kingston Wall, a Finnish 80's / 90's band, some form of psychedelic prog, will be interesting to hear.
The lead singer killed himself which ended the band.
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Post by Sovereign on Feb 20, 2016 19:53:16 GMT
Yep Ritchie has them. there's several of us who have them now. As one of the earliest builders of Najda I think I was one of the slowest to feel the need to mod it... It really is that good out of the box. But things can usually be improved, slightly. I'm struggling a bit with my health at the moment but when I'm back on my feet I'll have the time to build some more amps, I'll go for Colin Wonfors class A designs, then I'll be going active. It will be a god project to look forward to. |
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Post by speedysteve on Feb 21, 2016 10:40:30 GMT
Sorry to hear that.
If you go for Najda you will not be disappointed.
The benefits for multi way are so great.
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Post by Sovereign on Mar 5, 2016 8:38:07 GMT
Hi Steve From looking at these prices, www.waf-audio.com/dealers.php?lang=en. Do I need the analogue expansion board? I may have missed it in your thread, but am I correct in thinking that each Burson Audio Op Amp is about £50? Thanks |
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Post by speedysteve on Mar 5, 2016 18:27:58 GMT
The expansion board is just another channel, so unless you need 5 way the on board 4 would do you fine.
I got 3 pairs of dual (if that makes sense). Cheaper than singles.
You need 6 in all.
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Post by Sovereign on Mar 6, 2016 4:46:08 GMT
Thanks i just have three drivers per side
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