Just wondering if anyone has tried to do this mod to a Stax SRD-4 Electret transformer. I'm curious if its possible as I would like to get/make a better alternative to the ESP-950 box at a low price and SRD-4s are quiet common at low prices.
The SRD-4 is for electret not Electrostatic phones. The SRD-4 has no bias supply. Now if you can come up with an external source for 600v bias . The audio transformers should be fine for the Koss.
The SRD-4 is for electret not Electrostatic phones. The SRD-4 has no bias supply. Now if you can come up with an external source for 600v bias . The audio transformers should be fine for the Koss.
Thank you, I wouldn't be doing the mod myself and I suspect that whichever local shop that I contract for this wouldn't be interested in figuring it out for me so I don't think that this'll work. Shame too because you can find SRD-4s for like $40 Canadian.
Interestingly enough, I did find a couple of posts that sort of indicated it was possible in this thread:
At any rate, my normal-bias stats outnumber my pro bias stats by a large ratio. I actually own nothing that is cabled as a 5 pin pro-bias stax, since my pro bias items are an sr-001mk2 and an esp/950.
I have two SRD-7 and i figure that if i upgrade one of them to the Mk2 configuration i can use it (with adapters) with my esp/950 and baby stax, and any pro bias stats i may buy in the future. And if i upgrade the other one as well, I can sell it for substantially more money.
Converting the SRD-4 to an SRD-6/SB is just an academic exercise.
I might be amenable to selling boards after i complete my own projects but they won't be half as nice as Birgir's since they'll be home-etched and lacking the component side silkscreen and i don't have much interest for myself in supporting misc non-stax bias voltages. They might be half as spendy tho. I have a fair bit of copper clad fr4 and plenty of etchant. What is in question is my inclination to etch, cut, drill, and stuff boards.
I guess if there's interest from the entry-level stax crowd (of which i believe i am an elder statesman) in converting an srd-4 to a high bias energizer i could look into it. As was pointed out - just a few more doubling stages.
Yeah. And it's not hard to drill a hole in the SRD-4 enclosure and add a cable strain relief and lamp cord for an AC supply for the bias circuit, but the rotary switch would have to be upgraded as well i think.
For those that don't have a lot of experience in the vintage arena of Stax, I can not recommend the Lambda Nova Signature (1994~) enough. While it isn't as good as the Sr-omega, 007 or x9000, it does imo out perform the 009 and is dead even with the CRBN for me. Very forgiving and captures the e-stat sound advantages well, while also being one of the few models with full bass.
Compared to the omega the mid-range is not as organically clear (or rather it has a tiny bit of a nasal sound) and the soundstage is closer to the head. However, the timber and sound signature is similar.
Compared to the x9000, the mids are more forward and punchy. Separation and detail is not as sharp, but the diffused nature of it can be more musical.
Performed a good deal better on the Carbon than the all-tube Novem (similar power to KGSSHV), but I suspect that even on weaker amps it'll impress. On the Carbon I actually prefer the LNS to the x9k, since the power improved the LNS's layering but sterilized the x9k for me. That said I prefer the x9k/Novem > LNS/carbon.
Padam here triggered me buying a Lambda NB and luckily enough I have amps with normal bias; found them a bit too “neutral”. The (my) Lambda Pro I prefer over them, but the LNS still has an edge over them. What I also like in my collection is the original first Signature.
Padam here triggered me buying a Lambda NB and luckily enough I have amps with normal bias; found them a bit too “neutral”. The (my) Lambda Pro I prefer over them, but the LNS still has an edge over them. What I also like in my collection is the original first Signature.
The problem with the LNS is the bow, which likes to break in the middle. But soundwise it is also for me a favorit of the Lambdas.
My list of these 4 would be:
LNS
Lambda Normal
Signature
Pro
and somewhere in between the 404LE
Well, if you mean that owners of LNS care less about things, I will leave you this opinion. But what about those who own many different Lambdas and just the LNS has broken right at the welding? I know 3 people who had the same problem: 1 sold at eBay GB, one from open-end-music forum and me.
And Sören from Inexxon has known about this problem too.
Well, it strongly depends how you take them on/off I guess. If you use two hands it is rather unlikely, with one it is. There might be a product problem admittedly. None of my 15 STAXes or so I have/had showed any such problem ever...
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