Recent Posts

Pages: « 1 2 3 4 5 6 7 8 9 10 »
81
Other DACs / Re: Marantz 94 mark 2
« Last post by vitavoxdude on November 25, 2017, 11:40:29 AM »
Hi Steve and Ian :)
Yes indeed it would be great hearing a blow by blow account of the upgrade path Ian has traveled in order to be able to be praised by SG!!!  It must have a couple of great sounding TDA chips inside it then.  What other equipment is the CD spinner being used with??

For something with OP-amps in the output chain it does not always mean it's bad............I recently put some dexa discrites in place of some OP-amps and was shocked at how much better it performed all round. I tired to avoid the more usual Burson's etc.

It is easy to spot  a lot of the changes implemented, the changed dac decoupling caps, the obvious clock board and the diode replacements.  I remember those original POOGE articles and that couple of hundred page Marantz CD65 upgrades on the  DIY hifi site.

I would love for Ian to describe the process and give a guide to the uplift various stages took on.  This website could do with more helpful information and it will bring increased readership I feel.  ;D ;D ;D ;D
82
Other DACs / Marantz 94 mark 2
« Last post by stevenvalve on November 25, 2017, 01:50:22 AM »
Ian was over a few days ago with his full house modified Marantz 94 Mark2. He has spent many years perfecting it to this level. In its present state it is just brilliant and yes it has no valves. Its the only DAC that has been through this door that went neck and neck with my killerDac, it was very clean clear and noise free (one of his aims) Black indeed around the notes and they appeared to come from empty space. The sound stage is not as big and it does not have quite the bloom as the KillerDac, but is very similar in timbre and texture as mine and what i really like is it is not bright or white, instruments sound real, unlike most digital playback. It has none of the slow plodding nature of standard Marantz 94s. It is relaxed, natural, smooth, and has presents, with a solid image focus, yum its nice. Shows you can build brilliant from just good. But before you run out and buy a Marantz 94 remember he has spent many years tuning this machine and he knows how to get all the hard to find esoteric capacitors and resistors, and most are not commercially available. Anyway i will not rave on any more, but hopefully he can come to this page and explain how it works. The pictures do not show the full story, because underneath there is a compartment stuffed with more toys. I really could live with this Marantz because it makes Music, They should have built them like this in the first place.
83
Reel to Reel / Re: Nagra IV S
« Last post by gamve on November 21, 2017, 07:33:40 PM »
These are very nice machines. A pocket version A80 in my estimation. They may be small but the performance is huge.

84
Capacitors / Re: Capacitor Games
« Last post by vitavoxdude on November 18, 2017, 09:19:17 PM »
Hi Steve
Yes the Big D and big R nitrogols (from the UK) are the one's I am using, 8uF x 2 with a CLCL supply, one for each channel.  The Ducons sound a bit too soft and cuddly without the Mundorf's, it is better all round with them.  A bit like taking your finger off a record playing, pace improves and everything seems to tighten nicely.

I suppose it's dependent on what circuit you are using the Ducons in but as part of my 300B preamp they are a complete no brainer in the B+.  Pretty spendy for the pwr sup though.  Just as well I already had them and run in to.  :)
85
Reel to Reel / Nagra IV S
« Last post by stevenvalve on November 18, 2017, 08:45:50 PM »
My friend scored is machine recently, a Nagra IV S and its a piece of work mint mint mint with all the accessories including the metal fight case, leather bag, all power supplies, 10 inch reel adaptors, and its the full audio head etc. Its the only really complete one i have never seen and its like brand new. I what one, no i what his one, The only problem is the price $20,000.   
86
Capacitors / Re: Capacitor Games
« Last post by stevenvalve on November 18, 2017, 07:43:48 PM »
Well I have just added 2 x 4.7uF 1000v Mundorf Supreme silver/gold / oil caps onto the B+ of my 300b preamp, they parallel some 8uF Ducon PIO's.  To say the sound improved is an understatement.  The whole sound tightened up with better micro and macro dynamics.  Even the bass was more tuneful allowing the unraveling of complex passages.  So as smooth as the Ducon PIO's are, they benefit from the other caps greatly.  Not cheap to implement, but I already had them.  I can see why SG uses PP solens in the power supply of the leak 20 stereo etc, much more tactile sound and a most welcome uplift.  ;D ;D ;D ;D ;D ;D
Vintage 8uF Ducon oils are OK but in some cases need a by pass cap, if you can, try to get the English Dubilier 8uf, Preferably with earlier make with the big D and big R, not the american Cornell Dubilier. They will be a significant improvement. Not overly Smooth and polite like the Ducon.  Mundorf Supreme silver/gold / I will try them at some time.
87
Capacitors / Re: Capacitor Games
« Last post by vitavoxdude on November 18, 2017, 06:17:31 PM »
Well I have just added 2 x 4.7uF 1000v Mundorf Supreme silver/gold / oil caps onto the B+ of my 300b preamp, they parallel some 8uF Ducon PIO's.  To say the sound improved is an understatement.  The whole sound tightened up with better micro and macro dynamics.  Even the bass was more tuneful allowing the unraveling of complex passages.  So as smooth as the Ducon PIO's are, they benefit from the other caps greatly.  Not cheap to implement, but I already had them.  I can see why SG uses PP solens in the power supply of the leak 20 stereo etc, much more tactile sound and a most welcome uplift.  ;D ;D ;D ;D ;D ;D
88
Amplification (Pre/Power) / Re: Leak Stereo 20 Modifications
« Last post by stevenvalve on November 16, 2017, 11:31:32 PM »
Rebuilt this Second Leak Last Month, I really had too, because the second Leak 20, filled with B grade parts just did not have the same Magic as the main Leak, so it was just a case of put in what i had. Everything i installed was spare and i thought why leave 2 Watt resistors like Allen bradley, Shinkok, and old Andionote, and the even the new audionote models sitting unused in a box. I just measured and installed the right values and amazingly i ended up filling all the resistor places in the leak, but with no real tuning pattern just what fitted and to my real surprise the amp sounded superb, just goes to show that 2 watt quality resistors even randomly installed still work better as a hole than the 1 watt standard stuff. Then it was just a case of installing the worlds best capacitors Duelund VSF copper and a few well placed Solen PB 15uf capacitors, plus a partridge 8 Henry 200 ma choke. The sound now is really close to the full on leak stereo 20 but it is still a cheaper rebuild. But really i must say its not that cheap a rebuild anymore. One big problem is the Duelund VSF copper is so much better than anything out there, what does one do.
89
Vinyl / Re: how your records are made!
« Last post by stevenvalve on November 08, 2017, 08:17:06 PM »
Another how record masters are made, No wonder they sound noisy

https://www.youtube.com/watch?v=wqJ0ouQScM8
90
Tubes / Re: Why valves cost money
« Last post by stevenvalve on November 08, 2017, 08:02:06 PM »
Interesting watching a valve being made, i can understand why they are expensive.

https://www.youtube.com/watch?v=8n4WVRKkmww&feature=youtu.be
Pages: « 1 2 3 4 5 6 7 8 9 10 »