spritzer

Ooops forgot about about LG, that "stacker" pile of fail. Yet another variation of the same crappy circuit. I just love how protective Alex was of this circuit when everybody always knew what it was. I meant the Lau is the steaming pile of shit though. A true statement in price over substance.

All are easy to find and in current production. PSU can be pretty much anything bipolar. When Kevin was working on Jacob's amp I found some Elpac units what would work and are quite cheap. A 317/337 unit like the ones Twisted Pear sell would also work. Ebay is filled with suitable PSU's too.

None of that is really needed for small scale production or a one off piece but following what the stupid people in Belgium say can't hurt. As for 100V, it would be easy enough to order a transformer with 100V windings or just taps. The PCB would have to be changed or simply bypassed as the current voltage selector wouldn't work but it's a minor issue. Doug might have to look into some gold anodizing though for the Japanese market...

So Ultrasones then? Aren't they just Beats with some shiny added? We go through this every time something new comes along. It's always MOAR BETTAH!!! than what came before and the people banging the drum will move on as soon as something new surfaces. This goes round and round and round and... The truth is quite simple though and very few new products are actually giving us something new. The Ortho's may be the hot topic but in reality it's the HD800 which is the real star and where there has been proper progress. It's not perfect but no other dynamic can match it's abilities. It also says a lot about the Abyss that it's show with the LG though. The amp is such a pile of crap that Cavalli should be proud of the mediocrity and it is crushed by far cheaper designs. Specs are BS too but that's a given with Cavalli. Hell a basic Dynahi is more than 4 times as powerful and can stay in Class A. People have been asking us about clone boards but I really don't see the point. It's the equivalent of cloning that Lampazitor crap when it should just be put to the torch. Still it is expensive so it must be good...

Good point.

So my L-2 arrived yesterday but a small problem, the umbilical was still sitting in the US. Minor issue... Too early for any impressions but I do like the build quality quite a bit.

Ahh Guttenberg, how stupid can one person be... Edit: Ahh so he loves the RWA amp. That explains a lot...

...and oddly enough this thing actually works. There are still issues to sort out but it sounds pretty ballsy even in the crap test setup. The output tubes are run too conservatively so that needs to be changed and I need to figure out why the left channel sometimes cuts out. Does look pretty though...

Doesn't really matter which version you pick but it's normally good to go for the lowest noise.

...aka... old.

Replace either the LED or more likely the C1815. That's usually the culprit for me. Edit: Very nice Kerry and nice work on the mini boards. Mine didn't light up the CCS but then I didn't bother to get it working. The PCB was correct though so some part was faulty.

Very clean and it reminds me to get some tubing...

The board will always output balanced regardless of the input. Not really intended for SE but you could just leave the - leg not connected for SE. We are not concerned about the distribution as that is up to the people who want to build these. I have enough boards for my own use but the Gerber's will be available to all. The parts are all in stock at Mouser so that side is covered. PSU is +/-20V.

I'll know soon enough as mine is sitting in customs.

Happy Birthday little one. How does it feel to be old?

Ahh that explains it. Bloody Krell...

After a week of battling customs, here we are: Looks kinda cute... That's the PSU above it and it needs a 12V/2A brick to power it all. Just need to figure out the loading for the output tubes but I'm leaning towards 30K for the Anode and 280R for the cathode.

Well I haven't done anything on that small one for months... Too much crap going on and currently thinking too much about DHT's... Ohh and my Tiny Triode amp PCB's just arrived for some true miniature fun.

It should be between 180-200mV if I remember correctly.

Happy to help.

The T1 bias supply is just a voltage doubler with a divider. Just set it to 500V and with a 10M ballast resistor and you'll be fine.

Some may have them in stock still but they are officially phased out by Stax.

I've got my old 507 here now and been doing some comparisons against the 207. Very different headphones and even the sensitivity is different which makes direct comparisons difficult off the BHSE with two Pro outputs. Still nothing that the SPL meter and some test tones can't deal with. The 507 clearly has more bass, I''d even say far too much, of the two. It really dominates the sound in the same way that annoying *thwack* of the LCD's does. The 207 is far leaner and more down to earth. It can raise hell if needed but it's always a bit muted. Still I'll always side with restraint over exaggeration. The midrange has always been the Lambda's strong suit and these are no exception but the 507 lacks here because the bass is so overbearing. Give it any excuse to get out of control and there goes the midrange. The top end of the 507 is similar to the 009 as in it has a bite to it that isn't supposed to be there. This gives instruments/voices a "sheen" that is quite annoying to these ears. The 207 has a bit of this when pushed hard but at normal levels they are quite smooth. Not up to the Nova Series standard but they do ok. In terms of detail retrieval the 507 seems like it is superior but it really is just like the 009, abound with apparent detail. The 207 is just as good but it's just more laid back about presenting the information. As for comfort, it is pretty much a tie as the 207 headband is better but the leather earpads of the 507 win out over the pleather. Now the easy solution would be to just order some leather pads for the 207 but how much that changes the sound is not known. Both pads have similar height so protruding ears will be a problem.

The mounting is not as nice, that for sure. One odd thing, I've ordered a lot of the larger 2.5" sinks and some have shown up with the cutouts while others have just had one mounting hole. Same Mouser number... *Calling Steve to the local Krell thread.... Steve to the Krell thread....*

The drivers are sealed on both sides so it shouldn't be a problem.