headinclouds

I would like to have two more pairs of the individual GR LV boards and can also see them being useful in a few other projects. These are the small single boards 3.75" x 2.4" (95 x 61mm). I will be buying some (from England) and if you want to get on a mini buy please let me know. I am away next week so will place an order in early June. The price would be starting at $16 each and come down a bit if the order quantity goes up. (plus postage and pp fee). Please pm me if interested. Edit - to explain. I am based in England so that is where I am placing orders and shipping from. (and yes my first language is English!) Same arrangement and supplier as for the KGST GB I did. UPDATE; 7 June: I'm ready to order. The price is $24 for a pair of latest GR LV boards. Postage and paypal fee to add. pm me if you want any. UPDATE; 7 June: I'm ready to order. The price is around $20 for a pair of latest GR LV boards. Postage and paypal fee to add. YES $20 per pair now. pm me if you want any. .

Yes on the sound quality I think it is a very fine amplifier. Clean, fast, detailed, neutral etc. I noticed that it was very stable in respect to temperature. (The breadboard did use the full final heatsinks). It would come up to temp and then the offset/ balance would not change much for hours. I did not engage the servo. I tried a version with and without the cascode current sources but didn't carry out detailed listening comparisons. I also ran 10mA to 20mA and was perfectly happy with the 20mA performance.

Well done John! Nicely arranged and executed

That's good work Joamat. A fine example to us. and Kerry great stuff, are you doing that on your own milling machine? One of the "rules" I adopted from the outset was no screws should show on the front panel. It is a costly process and requires heavy material but looks good.

Excellent! It will be good to hear your views on it. I had a breadboard running a few months ago and sadly had to clear it off the desk after a couple of weeks. It was very nice while it lasted. I am looking forward to the proper build - my 007 Mk1 seemed to like it and since then I have also an L700.

Good work John! A nice tidy build coming on. Have you listened to a breadboard build?

Nice build Joe!

Very true - they certainly are banana shaped. When I made my first cases I decided to bolt a 1inch square bar (bit OTT) to the heatsink and tap that vertically downwards to hold the transistors. When I got the heatsinks and bar neither was flat enough so I machined a quick skim over the heatsink and the bar to get flat mating surfaces. But even having access to a milling machine doesn't totally solve the problem if the parts are not clamped correctly they'll bend and still not be flat after machining. P.S John, your fellow Australian has some useful info on all this in case you hadn't come across it. http://sound.westhost.com/heatsinks.htm

Yes thanks Birgir, that was what I was looking for. So possibly the large diaphragm and small spacing is more prone to this.

Hello Fred, Yes the beginning of my Stax adventure. On cases I can help easier with a design than I can with parts, I've been waiting 6 weeks for the front panels for my Carbons to be done. The guy gives precedence to his industrial customers. I'd do them myself but they are too big for our cnc mill. I'll pm you

Thanks Kerry for sharing this new PS design, a really useful addition to the ones available. And thanks congo5 for sharing that gerber viewer it is very nice .

Been pondering this issue of problems with the SR-009 (mainly and possibly a few 007). I have just acquired a new L700 and the instructions say "avoid using earspeaker in a hot and humid conditions", without any specific guidance. Well I wouldn't use them in the bath, but all my listening is done in England where the rooms are about 20c (68F) and dry. I have never had a problem with my Staxes. What is considered opinion of what is too hot and humid for Stax ES? And by inference any possible connection with problems people are having?

Great job. KoS, and I love the instrumentation. I am able to get on with my Carbon now and am looking forward to hearing it. I have high hopes for this as reports sound very positive.

Soren, I'm not surprised it took two days to repack and prepare for shipment. This is a big task. Thank you for all your effort on this GB. A great help to us. I am writing as mine arrived a few minutes ago all fine. Thanks Geoff.

Yes sounds plausible. And one thought about the platinum sputtered diaphragm, i assume this makes it slightly conducting and perhaps they can control the surface resistance very accurately.

I applaud Sennheiser for producing this advance in ES technology. Ceramic stators etc The inclusion of the output stage in the cups is a nice idea. But just speculating; even allowing for the halving of capacitance by eliminating the cable, and possibly a particularly efficient driver, surely some 6w or so (just as a quick guess) must be needed in each earpiece. A heat and weight issue. But the words “Cool Class A” suggest it is not true Class A at all times, hence reduced dissipation. The quoted distortion figure is nevertheless impressive.

Wow!

My boards arrived safely today, thanks for all your effort. On Mouser- I use them a lot and the service is terrific as UFN said.

It is done by an engraver literally a mile from my house. He does tons of cups and trophies for schools and sports clubs, and labels and warning signs etc. He also has a little milling machine with an old pc that does a limited range of fonts which he uses on my engraved panels. You might be able to find somebody doing similar work.

Thank you very much. This is the one I built July 2014 and posted about in this thread. The cost of doing them in Europe is the thing I was complaining about. but we can do good work.

That's amazing! and shocking too considering the cost of such things in Europe. These are no doubt made in quantity, but a bespoke case made here (such as this) would be ten times the price. My heatsinks were more meaty though

That's smashing Samsie! You're getting good at this.

They look good. Excitement mounting!

paid, thanks Soren great job. Geoff

Paid, and details included. Thanks for doing all this Michael