Was fun reading this whole thread. Lot's of useful tube info in here.
thanks, I just might be ordering one (I have to read through the WA2 thread first)
Never used the Bendix but have used 53YG Sylvania and other brands and I much prefer the 5U$G Sylvania as it is warmer and has more bass than the 53YG in my rig. If you do try the Bendix please post impressions.
Just purchased one of these new used and it sounds fantastic. I just want to be sure I am understanding something correctly: I can use different types of tubes in the driver and buffer positions, correct? Like a 6n1p for the driver and 6dj8s in the buffers?
I found this link to be useful when it comes to rolling tube rectifiers.
If you scroll down all the way to the last paragraph, rectifiers of the 5U4G family run the ECC88 tubes at the highest (one extreme) voltages.
If one rolls a 5Y3 class of rectifier, the ECC88 tubes are run at the lowest (the other extreme) possible voltages.
Each ECC88 tube has different sonic characteristics at different voltages and so this kinda adds to the complexity of rolling tube rectifiers.
Yes. You can use a particular tube for the single position (e.g. Russian 6N1) and another class of 2 tubes (e.g. 6DJ8s) for the L/R positions.
They can be of different brands and/or models of the ECC88 family.
For the 2x L/R positions, the tubes should be of the same make though.
I have ever experimented with 3 different types of tubes. I had excellent tonal and timbre accuracy but the imaging and soundstage was slightly off.
My CSP2+ has left and right volume controls and getting a matched pair of tubes for the L/R position is not really necessary in theory.
But in practice, I still prefer to used a matched pair because it is easier (at least to me) to maintain a L/R channel volume balance as the L/R individual knobs will produce the same volume as long as I employ the same number of "clicks" for each side.
Just a post to register that my CSP2+ arrived two days ago. It was formerly Mad Dude's, built March 2012. Decware transferred the lifetime warranty and checked the unit before sending it on to me.
To echo supra's comment above, it sounds fantastic. It's a revelation with the Beyer' T1s.
Whilst I have respected the T1s lack of stress and sense of unflappability, I've also found them bland and hence they've got much less listening time than my LCD2s.
They're not bland now! I find the transformation almost hard to believe. The CSP2 has brought them to life, much as the Taboo has done for the LCD2.
I guess everything that needs to be said about the CSP2/T1 match has already been said, earlier in this thread. I'll post again in a few weeks if I find anything new to say
^ Congrats - looking forward to your impressions soon.
I'm going to start rolling away from stock soon, looking for the more neutral but still dynamic sound I prefer. I noticed today some flabbiness in the mid bass from the stock set-up (feeding the T1), although otherwise it continues to sound amazingly good.
The stock 6N1Ps have a very warmish type of sound in the CSP2+.
I've rolled extensively (*) with the CSP2+.
In general, if you change the front 1x input tube to a higher spec tube such as a 6922 (e.g. Amperex USA or Philips) or 7308 (e.g. Siemens), the bass will be tighter.
(*) that's what my wallet tells me! ;)
Thanks Lord Soth. Yes, now the initial shock has worn off I've started to hear this warmth.
As soon as I've got the 'feel' of the stock sound, I've got several Matsu' 6922 I can try as a first shot. MadDude also included the tubes he rolled - likely to be some good options there too.
Update: I changed out the driver tube to one of the Matsu's mentioned above. Amp is still in stock configuration otherwise. Bass is noticeably more tuneful and tight and highs (upper mids) seem to stand out clearly (but more below). Btw, both these are attributes these 6922s bring to the Lyr as well.
Warmth seems less as well although this 6N1P property was much more noticeable to me when the CSP2 was running into the Taboo. With the LCD2 this was very noticeable, blunting the LCD2's clarity.
The stand-out from this change of driver tube is attack. This seems a truly fast amp. I haven't A/B'd, but it reminds me a lot of the Corda Concerto which has the most attack of my SS amps. This perception of attack may be the Matsu' bringing more emphasis or definition to the upper mids. Or maybe better attack just naturally highlights these frequencies. Whatever, I don't get the impression of a glaring imbalance here.
I may put Matsu 6922s into the driver positions too, but want to do more formal testing first.
The T1s continue to sound remarkable from the CSP2. I discovered the LCD2 is still my much preferred 'phone, but at least it's a more even contest now.
As implied above, I have done a couple of tests with Taboo. Mostly speakers. I'll report this in the Taboo or Decware appreciation thread next time I get a moment!
It shipped Friday! OK I expect to spend some time with the stock tubes, but I had to order a few to play with.
So here are the incoming tubes.....
3x NEW Genalex Gold Lion E88CC 6922 Vacuum Tubes TESTED, Matched Trio
any perspective on these? http://www.sophiaelectric.com/pages/se/274b.htm
BTW, when swapping tubes, how long do you wait for them to cool down before you take one out and replace it with another? Cool to touch? Just wondering....