spritzer

Because they are vastly inferior to the Stax and Koss models... All kidding aside it's good to see that you finally got your amp.

This should be the RSA motto...

Single ended. You can put on XLR plugs but that doesn't make them balanced. European manufacturers only use XLR on items that will be sold in the US and often it is just the plugs that are balanced but they are fed only the + output.

The Naim preamp will impact some of that coloration on the Stax so you could like the sound. The original CDS is a good player but highly colored so the SR-007 is only playing what you feed it. All Naim gear is SE only (like most Euro gear) so that is a moot point.

Naim gear is far from neutral so that's your problem right there. Getting a special output cable from the preamp could be the way to go though or just borrow a second Naim preamp and test it... C'mon... take one for the team The Lambda Signature is much better then the current models to my ears and I could only use the new ones for one thing... harvest the drivers to plant them in something else.

It's pretty amazing what can happen when one rifles through all the old spare parts and broken headphones that I've built up over the years. I just made a Lambda Pro from about 4 different headphones...

Why not or just design new drivers... No need to charge the headphones unless something is very wrong. Amp warmup is another thing entirely... You can use the plugs in any way you like and you can unplug while the amp is on.

They all work off the same basic principle but the SL's are a bit bigger and thus use dual transformers to make them an easier load. All speakers have a bias supply but often it is just a ladder type which can be improved on.

I'm not so sure that the SR-007 would like that 3kV output but we won't be that far off in the future.... Any idea of a price?

The SR-007 like most of the best speakers ever made will not impress except you are craving neutrality above all else. That means that they aren't for everybody and why some prefer the SR-Omega and even... ... the HE90. Getting the correct fit is very important and since these phones were used it could be impossible due to old earpads that have gone soft. What I'd do first is to drive the 717 as a power amp from the Naim Pre. Open up the 717 and flip the switch located next to the volume pot to disable it. Very interesting to say the least. Total utter overkill for the SR-007 but they could make a smaller version that works for us headphone lot.

It is SS but it is similar to the tube amps in terms of output power.

The SRM-1 is a class A amp so it will run rather hot.

I'm sorry to say but APL are on the same level as SP and that is definitely not a good place to be. I still haven't heard back from them about my player acting up in late March but I just fixed it myself so I don't care but I will never contact them again about anything.

The T1 is ok as a budget amp for the Mk1 and I prefer it to the 007t. Yup, it's a SRA-14S. There aren't that many out there but expect to see a hefty price paid for what is basically a SRM-1 Mk2 in a larger chassis and with more features. Very expensive new though...

Depends on the plate resistors but this basic design shouldn't be to hard to keep cool.

That's a shame since it could be a great alternative to the Woo and RSA A-10 at a much, much lower price.

Good thing that it was removed since that wasn't a platform for bashing Stax, Koss or Senn. I'd certainly welcome him here to discuss the design and any future development of cans and/or amps. Btw. Are then any news on the Little Dot ESP amp?

I really want them to succeed and bring those that like the Senn sound an alternative. I do have some reservations about the design such lack of air damping inside the stators, earpad shape and chassis design but these are the same reservations I have with the Senn HE's. Mr. HE does have the chops to pull off a good design (the various prototypes are the proof of that) so lets just hope he doesn't stop here and then drops that Head-direct idiot. I'd go with the 717 instead. The 007t is far to weak and soft sounding to do the SR-007 justice.

I've never heard a HE owner claim that the HE is better then the 007 so I guess he just alienated a lot of potential customer by pulling this crap. Not that they are going to sell a lot with them priced close to the 007 and HE60. I do wonder how much of that is dealer markup...

15 is small scale... I'd really like to try to build a Sigma on the 4070 chassis with that arc assembly. Whether is would require ports at the back of the driver or just ports in the baffle is tough to say but it could be done. I'm happy though with the Omega soundstage and the varying degrees I get from the SR-007 Mk1, Omega/007 hybrid and the SR-Omega. They are very nice indeed and a good improvement over both the normal and Pro bias Sigmas. The next one I'll build will use SR-303 parts so that I can see if it makes any difference as the cable is a much better match to the Sigma color scheme. The SR-007 Mk1 is simply in a class of their own so I'm very much weary of the recent declarations in the HE Audio thread on HF.

I do love the Sigma's and will build a few 404's in the future but they don't get much use. Collecting gets tiresome after a while and espcially when the funds can be put to better use making the system better as a whole instead of spreading it out. It was fun though... There is that small bit and all the DIY amps that I'm slowly working on. The DIY BH will be on the expensive side if I go ahead and build it with all 8 HV power supplies... and that's not counting bias supplies.

That's basically it. I did change the PSU caps as well with some stuff I had on hand but that was purely for safety reasons since the amp was used 24/7. I should update my profile though since that amp is gone now and my last T1 is up for sale... My wast electrostatic collection is in a sorry state with only 3 Omegas left, a SR-003 and enough parts to make up a few Lambdas. Then there are only two amps, 717 and 007t. :'(

No good ones but I have the schematic... It's clear that the newest Coriolan2 (or WTF it is called) is the same with parallel connected triodes on the output.

That would be easier then the involve Jesus in all of this. An Egmont is nothing but two triodes capacitor coupled together with no NFB or ground reference, crappy PSU and a bias supply that will kill your phones. I could do that...

Thanks guys!!! It's actually not that much bigger then a 717/007t, well each box that is. The amp is (W)262*(H)162*(D)438mm and the PSU a bit smaller. The T1 has it as well but it's labeled PRE HEAT on that one. The T2 must use a version of the same delay circuit.