spritzer

They do exist. Creating a normal bias supply is as simple as pie. A voltage doubler was the Stax way but there are others.

All you need is an adapter cable to borrow the bias from some other source, i.e. one Stax socket with two male plugs. You can also put a resistor on the Pro bias line to prop the voltage. KG explained how to do it over on HF.

While the parts quality could be better (I'm rather picky... ) the transformers are some of the best you can buy. I've toyed with the idea of building one of these and add a volume control, Stax transformers and a bias supply, 4 pin dynamic output connector and swap the 6SN7 for a 7N7 by changing the socket. I'd most likely go for the VT-25 version as it sounds better then the 300b though with less power.

Congrats!!

I have a late model SRM-1 Mk2 P-P sitting in Japan and I'll try it with the 4070 as soon as I get it. The 4070 is tough to drive (much like the Sigmas) but I do like them out of every amp I've used them with. They don't turn all dark and bloated as the SR-007 and Sigmas. I even used them for a month or so out of the puny little SRM-Xh (predecessor to the SRM-212 and 252 amps) in my computer rig and I didn't find anything missing. Ditto.

You can buy something like this and install a potentiometer while building it.

I'd rather say vomit inducing. Still its tradition and they aren't all bad. yesterday we had a special day where the nation as a whole eats creme filled buns (a very busy day for my bakery) and today we are supposed to eat salted lamb until we drop.

Brennivin is ok but hakarl is nasty!!! There are also sour sheep balls, sour sheep heads and other nasty stuff.

Sorry for the late reply but I really needed those 12 hours of sleep. The SR-007 isn't for everybody as they don't add too much color of their own. I'm sure the ES1 and 2 sounds good but do they have enough power for the two Stax phones to fully break away. We are talking about the two things that go mixed up in the Rudistor thread on HF, i.e. technical ability and how it sounds. The stock BH works fine for the SR-Omega but needs more power for the SR-007 so it needs a better PSU, bigger CCS and maybe some new output tubes. It sounds great now but there is always something missing. So I need to start planning an electrostatic meet soon, huh? The 4070 is one hell of an headphone and I would certainly rate it on par with the HE90, HE60 (each with own strengths) with only the SR-Omega and SR-007 doing better. It's analytical without ever becoming sterile and the lack of bass bloom makes it very easy to discern the smallest note. At 700gr they sure are heavy but very comfortable although I wished Stax had designed some Lambda style leather pads for them. Her summerhouse is close to ours so you could have a place to rest nearby while stalking...

I'm definitely getting the SR-007A and the other Stax phones I lack but after that I'm mostly done. I'll continue to search for obscure headphones few even knew existed as that is one of the only fun aspects of this hobby left. The one last thing to do is build the best amp I can to drive my collection.

Good to hear. Mine are still pretty much unchanged as I simply like them too much the way they are. Perfect for computer duty.

How is the SR-X Pro??

An upgraded Blue Hawaii would be my first place to start. I've spent some time recently chatting with an ES-1 owner why impression of these phones are so different between the amps and it must be down to the basic design. I've even been toying with the idea to buy a used ES-1 and compare it but I'd rather spend the 3k$ on building a new, souped up BH. I don't want to derail the thread but since I've been shifting my focus in the hobby recently this issue has been bothering me as to where I should go.

It's a good tube for just that, massive amounts of SET power. I've been looking into the deHavilland amp for my upcoming speaker rig and there is a reason why it sounds like that... the parts quality is awful. They are cheap so that was a given but some more life could be squeezed out of the beast. Btw. I have this itch to see what the GM70 can do for the SR-007 through custom transformers to replace the need for output caps. Who needs lights when you have four GM70's in a row... The 1.3 grill will have a large impact on the sound as it reflects part of the backwave. It would be much better to use some damping before the grill but that would result in a sound similar to the Lambda Pro. You really need to hear the SR-007 and SR-Omega out of a real amp. The ES-2 might be expensive but I'm not sure it cuts it...

Dual mono supplies with a single amp section. I like that he used GM70's in a headphone amp as Lamm is charging 100k+ for a similar amp for speakers...

I changed my mind after I started to make my own... see the Stax thread...

I'll have one as well...

Ditto. I've been working on a review of the whole Lambda line for over a year now and it's mostly been an overview of the history and what changes were made with a few impressions thrown in.

The whole SR-X line is great and there is the Stax SR-Lambda, Lambda Pro, Lambda Spirit/Pro Classic. Lambda Nova Basic and SR-202. If you want some more bling then the SR-5NB is a sure choice.

There is a lot of hype surrounding this player right now and that is usually my cue to run away. It is said to use an algorithm to make it "sound good" and use 32bit dacs even if they don't use the only 32bit DAC chip in existence. The processor they use as a dac might be 32bit but that doesn't make the signal 32bit.

The Fischer connector isn't cheap and it should be easy to get an adapter cable for something like 150$. Moon Audio sold them and some others as well.

It only takes about a day or two to throw together a simple tube amp. An Egmont or even something half-way decent...

The HE90 needs a capacitor coupled and rather warm one at that. The older Stax tube amps are a good place to start and with some basic mods can make them very good. I much prefer my modified T1 over the Blue Hawaii for the He90. The SRM-007t isn't as good but as a cheap option it is worth it.

LOL!!!!

This is crap IMO. The review is spot on and is a benchmark against all others should be judged. The reviewer has been in the headphone game longer then most (search Headwize for his posts) and has a clear understanding on what makes them tick.