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Post by speedysteve on Dec 14, 2016 17:43:50 GMT
How about trying Poplar Steve? You should be able to get it in large dimensions and it's pretty soft and easy to turn. Poplar is slightly harder. Spruce, Pine & Fir are pretty much interchangeable in the joinery trade, sometimes sold as SP&F Balsa would be the softest I would think. Soft SP & F will do and is cheap and readily available.
I'm making a pair in redwood that came from Travis Perkins. Be interesting to compare to birch ply.
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Post by speedysteve on Dec 14, 2016 17:51:08 GMT
Looking good Steve. Do you know anything about Vintage Tesla 15" drivers? No, not much. Alinco - nice, can't find any T &S params online though.
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Post by ChrisB on Dec 14, 2016 18:46:35 GMT
Redwood is Scots pine (though not necessarily from Scotland). Poplar will be slightly harder but should have a more even density across a piece of given dimensions and will be much less susceptible to rips and tears as you turn it. It should also be easier to get a good finish and is less likely to have dead knots in it. No chance of oozing resin cavities either!
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Post by Sovereign on Dec 14, 2016 20:31:04 GMT
Looking good Steve. Do you know anything about Vintage Tesla 15" drivers? No, not much. Alinco - nice, can't find any T &S params online though. No prob. I just bought a pair of super rare TESLA ARO 9408 15" drivers. They are meant to completely outclass the Altec Lancing drivers that I have read about for years. I can't believe I found the pair and the chap gave me a great deal on them. So I now have all the drivers I need to start my new DIY Lampizator speakers. Won't be starting for a few weeks yet.
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Post by speedysteve on Dec 16, 2016 16:51:06 GMT
Sounds like fun Sovereign.
The redwood horns are coming along nicely.
I'm still enjoying the 'new' sound.
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Post by speedysteve on Dec 22, 2016 13:47:25 GMT
I was using 3uF caps on the Vixtavox S2's. Najda was open on channel 7&8, i.e. no X/O at all. Last night I tried using Najda as the crossover for them, as I do for the lower the driver pairs and found 1200Hz Butterworth to be the best, by ear. The S2's have a nasty freq spike at around 800-1000Hz or so, so you need to cross with suitable slope at a point above that and it magically disappears and all is smooth. They can then truly shine with spell binding emotion, realism and dynamics. I was struck by the smoothness of the music conveyance and superb qualities of symbols and the like. I have compared the two before and don't recall the DSP being so clearly preferable! In fact I had some tail off of amplitude higher up the freq range back then. I can't hear that now. Perhaps will not measure it this time Perhaps the Cross caps I was using have seen better days / of course they were never in the big league. Top AN and Mungdorf caps will set you back a cool £1000 to £2000 - er ' I'll get my coat '. There are other vintage ones I would like to try but they are like hens teeth. Hard to see how they could beat the DSP though tbh - am using DSP to do time delay etc, might as well use the X/O too. Fun and games. Najda continues to impress many years on..
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Post by MartinT on Dec 22, 2016 14:07:46 GMT
Amazing the performance you get out of it, Steve. I would not have thought all those electronics in the way could sound so transparent.
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Post by John on Dec 22, 2016 18:10:44 GMT
Great news Steve
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Post by speedysteve on Dec 22, 2016 18:51:28 GMT
Amazing the performance you get out of it, Steve. I would not have thought all those electronics in the way could sound so transparent. Yeah, once you declutter from caps and inductors, let alone L-pads the clarity improves no end. I would not have thought one cap would be so detectable.
I guess the design and build counts for a lot. Once you have the digital signal do what's needed and then good Dacs / the Burson Opamp upgrade helps.
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Post by Deleted on Dec 22, 2016 18:57:11 GMT
I think ive said this Before simple Circuits do not make for a better sound. I for instance prefer Active Pre amps over Passive any day of the week. I think people get this vision of actual sound going thru their Hi-Fi system. It's nothing to do with sound, that is just the end product expelled from the speakers.
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Post by MartinT on Dec 22, 2016 19:01:27 GMT
I for instance prefer Active Pre amps over Passive any day of the week. With that I completely agree.
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Post by Sovereign on Dec 22, 2016 20:33:53 GMT
I think ive said this Before simple Circuits do not make for a better sound. I for instance prefer Active Pre amps over Passive any day of the week. I think people get this vision of actual sound going thru their Hi-Fi system. It's nothing to do with sound, that is just the end product expelled from the speakers. That makes a lot of Sense
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Post by Sovereign on Dec 22, 2016 20:38:42 GMT
Hi Steve
How do you find the dac side of the Naja, have you compared it to anything?
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Post by speedysteve on Dec 23, 2016 22:34:08 GMT
Hi Steve How do you find the dac side of the Naja, have you compared it to anything? I compared it to my then favourite dac, the DPA enlightenment. I'd had many Dacs before and after that one on the search for the best. I didn't find a better sound including some fairly expensive offerings. The first thing I did was use it as a ADC to DAC in my then existing analogue system for playing both CD and Turntable. It was SO transparent it was a bit of a shock. Then I used the dac capability and found I liked the dac very well. Slightly tonally different to the DPA but a pleasing sound indeed. Then I introduced it's DSP capabilities too You can change the Dacs I believe, but I've never felt the need. A long discussion on the Diyaudio forum basically concluded that there are several dac implementations out there, most important is the way the dac is integrated into the total solution rather than one type being superior to the others on paper.
In DSP terms I've only compared it to a pair of modded Behringer DCX's.
They didn't last long. Very basic SQ! All analogue was better! Even not having time alignment, and the limitations of caps and inductors etc in full range 5 way system could help the Behringer!
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Post by Sovereign on Dec 23, 2016 23:16:04 GMT
Very helpful and interesting Steve, thank you.
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Post by speedysteve on Jan 1, 2017 13:45:46 GMT
Today I've mostly been comparing Tidal vs my Flac files on server vs Spotify basic.
By upgrading to Jriver 22 (20 or above would have also done) the WDM plugin they've included provides a Jriver audio device in windows to which any app or music output can be fed to, importantly avoiding Windows mixer (for sound quality reasons). This means that the stream is sent from tidal etc to Jriver where I up sample to 96KHz (unchanged if the source if above). Doing this upsampling has always given me best sound. Jriver then outputs to usb via WaveIO and in to Najda I2S.
So, I subbed to Tidal for a trial month. It's £20 a month btw!
I can't hear any difference in quality between Tidal and my Flacs. Listened to all my fav tracks.
Spotify sounds a bit compromised but not too bad, better using it this way in than anything I've tried before.
I'm going to get my daughter to login in to her premium account so I can try Spotify premium (320kbits/s). I let my premium sub lapse a couple of years ago after many years and early adoption.
Having the entire Spotify catalogue again is nice.
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Post by speedysteve on Jan 1, 2017 14:05:35 GMT
Other musings. My tablet automatically senses Spotify is being used on the server and goes to slave (remote) controller mode. It's something Android and I phones do. The Spotify app on windows phone lacks this functionality! I used to be able to do this on my Symbian way back! Another nail in the WP coffin
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Post by MartinT on Jan 1, 2017 15:18:30 GMT
The Spotify catalogue is quite wide and that's what I like about it. I think the Premium subscription is worth every penny and wouldn't be without it now. It's my primary source at work, on my home PC and sometimes in the car.
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Post by speedysteve on Jan 1, 2017 15:37:42 GMT
Yes its a huge catalogue. I like the Swedish connection (Spotify is a Swedish company), there's a huge Scandinavian music catalogue. That's something Qobus lacks. That's probably great for French stuff. I've not looked at Tidal's Scandinavian catalogue yet.
I've now listened to Spotify 320kbits/s. A little better.
I did a blind test on Marie. A track she likes. First played the Flac, then Spotify, then Tidal. As soon as the Spotify track was on for a bit, she said I prefer this! Then the tidal version. Discussing it, she prefered the less detailed vocals, slightly less air and echo. This brought the music forward somehow... Which she prefered. I preferred the Flac/Tidal but I was Not blind tested. Must get Marie to cue some rest tracks for me and see.
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Post by John on Jan 1, 2017 16:15:39 GMT
Really interesting I am now at the point that I can really enjoy Spotify but its no where near my wav file collection of music using BH I not tried Tidal yet but must admit I like the approach you are using so might give that a go Anyone tried Roon yet
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