Doug Schroeder Method, Double ic

alexatpos, thank you for relating your experience in regard to Schroeder Method and your system. Every contribution to understanding it is helpful. I wonder if the output of the CD player is a factor in the outcome you experienced. There is a possibility that the capacitance of the doubled interconnects was too high.

One thing that is very helpful in the overall assessment of the doubling of ICs is that it seemed obvious to you that the sound had changed. That in itself is important, because it reinforces the experience of others, that the sound changed noticeably. 

It would be helpful to me and the community if you would share the precise make and model of your CD player, Preamp and Amp so that the specifications could be found, and perhaps better understanding of what might be the issue can be discovered. 

I wonder if you are using a very low power amp and if that might be a factor in the result. I had discussed use of double ICs with Kevin Hayes of VAC and he said it would present no problem with his amplifiers. But, I hasten to add that the topology of amps, even tube amps, can vary dramatically, so this response certainly cannot be extended to all amplifiers. 

 Again, if we can see the equipment used that would be very helpful to everyone. 

Douglas, by all means,no problem. Here are photos with specs.
The tubes are 6550 and ECC 83, all Tung Sol

http://www.highendshop.gr/images/P/UnisonResearchp30.jpg

P30K Technical characteristics

• Type : Stereo-mono Valve Amplifier.
• Output Stage: single ended, ultraliner, parallel
• Classe: A pura
• Output Power: 30 watt ( stereo ), 60 watt ( mono )
• Output Impedance: 4 – 8 – 16 ohm ( stereo ) 2 – 4 – 8 ohm ( mono )
• Input Impedance: 47 Kohm / 50 pF.
• Feedback factor: 15 dB.
• Valves: 2 x ECC83, 4 x 6550 / KT88
• Power Consumption di Potenza: 280 VA
• Dimension: 275 x 460 x h 200 ( mm )
• Net Weight: 28 Kg / 61,8 lb

C5P Technical characteristics

• Type: preamplificatore valvolare line / Phono*
• Class: pure A
• Inputs: 3 line, 1 phono*
• Impedenza d’uscita: 800 Ohm
• Input Impedance : 47 kOhm line, adjustable phono*
• Gain: 52 dB phono*
• RIAA: passive ± 0.2dB*
• Bandwidth: 10 Hz ÷ 100 KHz
• Valves: 3 x ECC83 line, 3 x ECC83 phono*
• Remote Control: radio for volume
• Power Consumption: 25 Watt
• Dimension: 10,7 x 21 x 7,9 inches
• Net Weight: 22,5 lbs

Player is MF, modest one, its on the loan, I can check the model if needed. Its not near versatile, regarding its functions (changing of gain) as my previous Dcs player, so I express some reserve about it. The cables used are HiDiamond D2 xlr, configurated to rca. Here are the specs for them too

https://www.dagogo.com/hidiamond-d2-and-d7-interconnect-cable-review/

Right Doug....2 -1 meter pair (phono to preamp, silver disc player to preamp) and 1- 5 1/2 meter pair from preamp to amp. Still not broken in.....interesting the 1 cable that is oldest is phono to preamp.... phono sounds WAY better than CD.  All balanced XLR cables

alexatpos, thanks for providing the info on the specs. Those look like very fine components with class A tube power; I'm guessing very sweet sound. 

One thought that strikes me is what appears to be three outputs, 4,8, 16 Ohm. Are you by chance using the 16 Ohm output with the Schroeder Method cables? I'm wondering if that would introduce the effect you are hearing. Is your system appropriate to try the 4 and 8 Ohm outputs, i.e. speakers appropriate? It would be interesting to see if the output influences the result of the Schroeder Method. Please confer if needed prior to attempting. But, it sounds like you know what you are doing. 


Stringreen, by saying phono sounds WAY better than CD, are you suggesting that the CD got worse, or only that the phono is enhanced more greatly? It is hard to understand your comment the way it is worded. I'm asking because alexatpos is using a CD player and is not getting a good result currently. It may be correctable. 

Even my wife says she doesn’t understand me.......My thinking is that the cable from the turntable being the oldest of the Schroeders has reached a higher level of performance because the new ones (from the CD player) are still opening up. At this time, the CD player is not what I think it can provide in sonics. With my older silver cables, the turntable sound was better in some ways than the CD player, and the CD player was better in other ways....all depending on the recording. Also, all sound is going via the long preamp to amp new cable.  Of coarse, I’m open to any of your suggestions. ...just as an aside, I’ve played the Purist Audio and Ayre break-in discs but without any progress.