spritzer

The new Stax serial numbers are so complicated that there is no way to read anything from them. There have been some revisions of the 007t over the years but I'm not sure what it is that they did. I suspect it is mostly changes to the layout and some part changes but there is no way to know for sure as Stax will never fess up. You know you want to...

That didn't take much courage compared to what I just finished doing... Lets just say that refurbishing a Lambda driver is a terrifying experience. Scraping off the old glue is required and wielding a razor blade less then 1mm from the diaphragm is a sobering task. It went off without a hitch and now it's 24 hours until I know whether it worked or not...

I've been playing with the SR-007A tonight and decided to try and find that damn opening that is causing this bass bloom and it seems that I've found it. The first picture is the one I took a few minutes ago of the SR-007A open and the latter is the only one I have of my SR-007 Mk1 with the pads removed. Please note the notch above the cable entry on the SR-007A. It's tough to make out the different heights in the white plastic bot the earpad flap rests on the second from the top and as you can see the notch goes where the earpads can't cover i.e. sound from the chamber can reach it without any obtrusion. The cable entry has a small gap on each side so they could be acting as mini-ports and allowing air to escape the capsules and thus making the Stax fart nonexistent.

True. There is some potential there but it's not going to be easy. Another thing that interests me is the application of a more more open ESP driver but again far from easy. Bog standard moving coil in the K1000.

The Mafia is on it...

Planars are my flavor and not just electrostatics as I have 3 iso-dynamics and I'd like to investigate ribbons for headphone use.

Indeed... The amp will probably have some propitiatory connectors on the back for hooking up ESL's though it will only work a low level testing. There have been worse FOTM's over the years then Stax.

I don't know about Justin's new amp but mine could end up around 3600v.... .... ... It's not set in stone by any means but it's a possibility.

Around double the bias voltage. A safe insulation rating for air is around 100v/mil which is around 3.9kV/mm. The D/S gap on a Pro bias Stax driver is 0.5mm so around 1950v before the air breaks down.

They've really grown on me. The finish is also spectacular...

Since I just finished converting a SRM-323A over to 240v I though it would only be fair to take one for the team here test it with the SR-007A. I can safely declare that it isn't really good at driving them not that couldn't be predicted. The extra bass bloom helps by covering up the true lack of extension and the sound is rather balanced but lack all the drama I know the SR-007 can deliver. The SRM-1 Mk2 PP is a rather better amp, even though it looks like shit next to the very purdy newcomer, with more extension, balls and HF sparkle. In other Stax news, a new SR-Sigma Pro 404 has been born and I can confirm that the original SR-Lambda drivers used uninsulated, etched copper plates for stators. One sett arrived with a failed glue on the a driver so I split it open for a peek. Very simple construction and no wonder Stax has made them by the tens of thousands and still do.

The same way Quad did it in 1955, stiff stators in a simple, yet stiff frame.

The HDD and RAM are as big a part as the CPU and GPU when it comes to ultimate performance or were you talking about RSA Raptor....

That's pretty much it. I'm going to go hug my BH now... Very cool. When you get the SR-007 fit right the crazy headband design suddenly makes perfect sense. Pads are something that should not be overlooked.

Not much of a gamer are you...? The RK50 is the only way to go.

It's not a combo I'd recommend. The transformers simply can't drive the load presented but a good DIY adapter could be something to look into. It isn't the voltage that is the issue but current and the transformers struggle to deliver it.

Same thing here. When it was time to upgrade that computer the Athlon T-bird was out and I've never looked back.

Very cool!! That reminds me I've been neglecting my SR-007A in favor of the 40$ Koss ortho I made... \ Then there is the large Stax shipment that should arrive tonight so there is even less time for the SR-007A.

I got it really cheap which was my major requirement and I never buy Intel if I have a choice.

I just bought and installed some new PC stuff: AMD Athlon 6000+ Dualcore processor 4GB of DDR2 ram Gigabyte motherboard Geforce 9600GT 512MB It's a huge upgrade over my old rig and playing Crysis in medium settings and 1680x1050 is something else.

The phones hold the original bias for a good few minutes so that is certainly possible. I did try something similar to that by using an SRD-7 mk2 to charge some of the phones in storage but I never pursued it further then limited testing. I was going to have a special storage cupboard built and that would include bias supplies to keep the phones always ready but it never materialized. I do think it's a good idea to let the phones rest so while I'll have a air tight cupboard built it will contain amps to warm up the phones I want to use and not bias supples.

Believe in the transformers!!

Happy birthday!!!

You can find them here. I also looked through the PCX site and Hammond 1608 output trafo should do quite nicely and gives a nice range of stepup ratios.

The Just real music trafos would be an unseen recommendation but just about any 5000:8ohm output transformer with a CT primary will do the job just fine. The circuit can be made to be really tiny so it shouldn't be a problem. There were two versions of the SB design, one with extra transformer and one without but I've seen the service manual for the Mk2 SB model and it uses an identical bias supply to the AC powered unit.