spritzer

You need to run them with the 4.5v PSU as the batteries just can't power them. I haven't spent much time with the SRM-001 variant but with my SR-003 I can get mad bass with an improper fit and when fitted just right they don't lack bass at all.

2007 was a very good year for my electrostatic rig. I finally stepped up my electrostatic collection and bought a SR-Omega, HE60, 4070, Airbow SR-SC1, SR-404, Lambda Pro, Lambda Nova Signature, SR-Sigma, SR-5NB, SR-3, SR-3N, Gamma, Gamma Pro, Alpha Pro Excellent and SR-X Mk2. Add to that all the other phones, amps, adapters, cables, tubes that I've bought and sold and it is a small fortune... I have the nasty habit of buying every great deal I come across so I often have multiples of something or I'm forced to buy the headphones I want bundled with something I have no use for. This can lead to some interesting collections such as 3 Lambda Signatures, 5 SRD-7 Mk2's and 5 SRM-T1 amps all at the same time... The main rig has remained unchanged for the most part since 2004 but I sold my Meridian G08 in December and I'm waiting for APL to finish updating my player. I did continue to work on my cable designs in 2007 so now my rig is ready for major upgrades in 2008. I'm going to finally invest in a good rack, upgrade my Blue Hawaii (or just build a new one) and rework my power situation by building a new all silver distribution block for the second dedicated line and finish building cases for the two huge transformers I use with all of my 100v and 117v gear. All in all 2008 should be a lot cheaper the 2007 unless I start to collect electrostatic speakers as well.

It's an EL54 so similar to the 34 but not the same. Might work in the ES-1 but the BH would have to be modified.

I doubt it will surpass the original BH but it could. The 6S4 is a good tube and well suited for this role but it hasn't got the power of a triode connected EL34.

They really know how to roll...

When you don't know what the benefits really are it's hard to sell them as improvements. The Valve Art tubes that you shipped with my amp started to discolor early on but my main Mullard XF2 quad doesn't show any signs of wear even after 2 years of much use. The delay helps the new production stuff a lot. It's true that the case isn't too sturdy but it doesn't ring too much. It's still a lot better then the horrible Hifi2000 cases as I used two for my KGSS. They ring like crazy and required a lot of damping to sound good. I still love the silver look of my BH and it will match the silver SR-007A perfectly...

What they don't know, won't hurt them.

I meant it sounds great as there are some updates going on. I'm not a big fan of the "lets make it prettier and charge more" way.

In Icelandic: Eg aeldi a barn Guds Stupid forum software doesn't allow the Icelandic characters I had to dumb it down.

That's only on ebay as they are pushing Paypal.

Who needs a XONO when I have my very own modular Stax phonostage in the SRA-3S...??

Nelson Pass is indeed one of the greats. A skilled designer that is willing to try new things, doesn't hide behind some marketing BS and shares his designs when he's done with them.

I haven't had many transactions there yet but all have been good so far, both buying and selling.

That's not what I meant but comparison in build quality with Pass Labs is a great honor, something Justin fully deserves. Sounds great. I've never been completely happy with the sound of the stock KGSS I built though it has many redeeming qualities. I take it will be built on a single PCB with the everything incorporated such as the Aristaeus and the KGBH SE?

Very nice Justin. Anodize them black, slap on a silver front panel and it could be mistaken for a Pass Labs amp. Are you going to do any work on the KGSS circuit besides altering the layout, new PSU etc.?

Welcome to the Stax mafia. The system looks great but let the upgrade madness commence...

I never got that cool shirt with my set...

Cool! Their worth is hard to fathom since we nothing about them but 2-400$ could be a good guess but it really depends on the sample. There is no way to easily fix them and no source for pads so you are shit out of luck if something breaks.

Absolutely correct. I was looking at the minimum standoff voltage in the spec sheet.

Nope but I want one!! Badly! They are one of Jecklins designs and we know next to nothing about them. Totally incompatible with the Stax standard so you need to use the original step up energizer.

Here is the SRD-7 Mk2 schematic with the bias supplies on the bottom. It's pretty straight forward with a 150k resistor on the input and then the z1100 bidirectional zener but you can use two 81v units instead facing each other. The rest is easy and it doesn't take long to build on a perfboard.

Ouch!!! I'm going to go and hug my SR-Omega now...

Keep me posted because if an upgraded PSU does improve the amp a great deal it will save me huge amounts of money...

What I'd like to know is how an upgrade can take up to two years and why do people put up with this crap? I'd like to see some measurements on the ES-1 such as output impedance, slew rate etc. as those will tell us a whole lot more then the voltage swing alone. I do have an itch to throw together a second BH psu and see how the amp responds to dual mono supplies... \

The truth is that the HE90 doesn't like direct coupled, relatively neutral and clean amps. They need something to mess up the sound, be it the steaming pile of crap that is the HEV90 or some caps in the signal path, to gloss over the biggest faults. This why an Aristaeus is on my to buy/build list but Marc's talk about the souped up KGSS has made me want to take a second look at the BH and see what can be done for the PSU. I think the BH deserves a PSU that is at least 5 times as big as the amp section. Can anybody say giant film caps...