icnaiwhimor1975
New Head-Fier
looks like my 6FQ7\6CG7 tubes in stax T1S are dead
is looking for some analogues to them a good idea
is looking for some analogues to them a good idea
+1 on the 6SN7 conversion. I've used these popular Tung Sol tubes in multiple devices and always been happy with them.I use RCA Clear Top 6CG7s in my 006tS. Not cheap, but I read reviews that they were better than the stock 006t tubes. I didn't really notice much of a difference, but that was over a year ago when I wasn't as good at picking out sound changes, and I haven't switched back to the stock tubes for comparison (biasing the amp is too much of a hassle). Though I'm not sure if they'd be an upgrade over the T1S tubes; I've read that certain units back then used really nice tubes.
Another thing you can do is buy 6SN7 adapters for the amp. Stritt Audio in Germany makes and sell right-angle adapters so that the 6SN7s fit horizontally inside the case and you don't need to remove or mod the top cover. That gives you more options for tube rolling, as there are a lot more 6SN7s plus new production and they are electrically compatible with 6CG7s. A more advanced mod that a few people have done is adjust the amp to run the 6SN7s at a higher power (more output current) since they can handle more power than 6CG7s.
Tung-Sol GTBs are also what Stax uses in the SRM-700T. And even Spritzer thought that amp sounded good after he did the CCS mod on it. I've been thinking of doing the 6SN7 mod and adjusting the CCSes for higher output current and thus getting something like the 700T on the cheap, but I haven't gotten around to that yet.+1 on the 6SN7 conversion. I've used these popular Tung Sol tubes in multiple devices and always been happy with them.
https://www.tubedepot.com/products/tung-sol-6sn7gt-new-production-preamp-vacuum-tube
Nice! Looking forward (with bated breath) for the comparisons!Yeah, built like a tank. I just couldn't get it out of my head after seeing @aokman's videos on it and had to get one. He uses it with his Lundahl transformers (that I also use) and seems to love it. https://www.youtube.com/watch?v=M25GISNbfhE and at 200Wpc it's powerful enough to work double duty running my Magnepan speakers as well.
Probably two months still until I get my RAAL order, I actually ordered both Immanis and Magna and will be keeping whichever I prefer.
Will be doing lots of X9000 comparisons here since that's the only headphone I have that I suspect will put up a fight.
IIRC the SRD-X Pro uses the actual headphone signal to generate the 580v bias which is pretty poor design.What are peoples opionions on the SRD-X pro?
Personally not noticed much difference sonically from SRD6, is the SRD 7 much better than SRD6 or SRD-X pro? However lots of info seem to recommmend SRD7 as the best STAX enigizer (not amp), is this mainly due to the transformers it uses?
Also, the extension cable SRE-725 uses OOC (copper), yet the signature models (& L700) use silver OOC. Does this mean not advisable to use extension cable with 'silver' cabled models as this limits them to the constraints of copper OOC cables (if there is any difference)?
How will you use it with the Stax?Yeah, built like a tank. I just couldn't get it out of my head after seeing @aokman's videos on it and had to get one. He uses it with his Lundahl transformers (that I also use) and seems to love it. https://www.youtube.com/watch?v=M25GISNbfhE and at 200Wpc it's powerful enough to work double duty running my Magnepan speakers as well.
Probably two months still until I get my RAAL order, I actually ordered both Immanis and Magna and will be keeping whichever I prefer.
Will be doing lots of X9000 comparisons here since that's the only headphone I have that I suspect will put up a fight.
Definitely ditch the STAX SRD transformer thermistors if they exist / but you must run with resistors, if you try to run them directly, the FR will be completely out of whack and there is a sharp voltage rise as frequencies increase. Ironically the Edcors perform almost identically. The problem is getting non inductive wire wounds these days, not that I noticed a difference in the real world.IIRC the SRD-X Pro uses the actual headphone signal to generate the 580v bias which is pretty poor design.
SRD-7 doesn't do this and has bigger/better transformers but is still not optimal, you'll get some roll off above 15khz with the SRD-7 as the transformers saturate. It's possible you may actually find this enjoyable but yeah, it's not accurate. One thing you should do with the SRD-7 that helps a lot is remove the thermistors and replace with resistors since they add unnecessary distortion in the signal path. Takes 15 minutes with a soldering iron. I go over the process starting with this post: https://www.head-fi.org/threads/the-stax-thread-iii.677809/page-1605#post-17658579
Only way to get "optimal" performance from a transformer is DIY using something like Lundahls or Edcors. Reason I put optimal in quotes is some would still argue it's suboptimal due to some odd transformer effects but you can at least get big voltage swings and flat frequency from a large enough and well built enough transformer.
You could also buy an SRD-7 already modded with Lundahl transformers from Mjolnir Audio if you're ok spending $1500 instead of the $500 to do it yourself.
With a transformer like the one mentioned in the post you quoted and the post above yoursHow will you use it with the Stax?
I think simconn posted about in somewhere in this thread. Weird second order type stuff not readily apparent in voltage swings or frequency responses.Would love to hear why transformers are suboptimal also because I haven’t found any downsides yet though I haven’t got into measuring phase etc… yet.
all these transformer things are just a cheap way to listen to hp, hold out until waiting for a package with a real amplifier like Megatron or CarbonWhat are peoples opionions on the SRD-X pro?
Personally not noticed much difference sonically from SRD6, is the SRD 7 much better than SRD6 or SRD-X pro? However lots of info seem to recommmend SRD7 as the best STAX enigizer (not amp), is this mainly due to the transformers it uses?
Ahuh…. I keep hearing such things then you try to decide what direct drive amp to buy and the crap fights begin about what direct drive amp. KHSSHV, BHSE, Z10e and god knows what else and no one was willing to subject one to analytical measurements vs a high end transformer setup, let alone each other…all these transformer things are just a cheap way to listen to hp, hold out until waiting for a package with a real amplifier like Megatron or Carbon
After listening to them just once - you will no longer want to return to transformer boxes
It makes sense to use transformer boxes with something cheap like cheapest lambda series if the main goal is to save as much money as possible
all these transformer things are just a cheap way to listen to hp, hold out until waiting for a package with a real amplifier like Megatron or Carbon
After listening to them just once - you will no longer want to return to transformer boxes
It makes sense to use transformer boxes with something cheap like cheapest lambda series if the main goal is to save as much money as possible