spritzer

I was dealing on that scale... I'm going full steam ahead towards custom everything with as much of if as is possible being made here in Iceland. Only the best will do for the new Carbon CC...

Well it does give us some data. Either the phones and amp "talk" via active circuitry or there is a load in there which must be present for the CPU to engage the output relays.

Fischer are excellent though. They also do what ever custom stuff you'd want for a price.

I'll check as that's the only bit I actually care about. It helps to have a distributor that basically lets me do what ever I want.

That would be my guess as well. No way to alter the charge on the diaphragm in a constant charge setup (and it won't sound all that hot if it is indeed conductive) so a smaller gap would be plausible. The HE90 uses somewhere around 0.4mm given the fondness of driver issues so this could be similar. Both the HEV70 and the HEV90 used +600V supplies cap coupled to the stators.

Probably just a current limit on the PSU controlled by the CPU which runs all of the amp. It would be hard to run any sensing into the headphones.

That would indeed be my concern. That's why I have MSB stuff as they have been around for a long time and do care about the older tech.

Well we would just design a new amp for them. Not all that complicated and gold plate the fucker... The 8 tubes is just nuts, what could be possible be using 16 triodes for? The Octave, Aristaeus, HEV90 have 12 which includes the output devices. My problem is with the whole "less capacitance" malarkey. Can anybody find a DPAK or smaller mosfet with truly low Cob? The Toshiba BJT 2SC6127 would be perfect for this but not a mosfet...

It won't be cheap so well worth opening them up and see if the thin wires that go from the cable to the drivers are intact.

Cool, you can move my last post too Dan as it is for the new Orpheus.

They have to be doing push pull so not Class A but yeah, there is no substitute for current.

Check the Stax thread...

Thanks. Not a whole lot of stuff left but I might sell T2... In true Icelandic tradition I'm spending way too much on this so yeah, it would help...

I get a massive discount but even then I'm out as I just bought a house.

I have some issues about all of this besides the retarded price and the utter certainty of the amp being shit. First off is having the amps in the earcups, good idea in many ways but mosfet output? I don't know of any SMD mosfets with low output capacitance which is crucial. 200pf into a 50pf (just guessing) will make this sound worse than the Cavalli crap and that says a lot. Before people jump to and say that Sennheiser wouldn't do that... well they did in both the HEV90 and the HEV70. Sure it was the tubes in the 90 but still the same applies. I have the strange sensation that I will change one of these to a bloody Stax plug in the future so it can be driven properly... Going by the stuff I get asked to do all the time it wouldn't be a shock.

Try one thing first, try to hit the offending driver with some force and see if that fixes anything. Also ground the pins on the plug. Just touching them helps dissipate the charge.

Yeah, get a 007Mk2 and report back...

Just get a super cheap scope (Rigol, Siglent etc.) and some HV probes. Compared to the cost of the amp it costs next to nothing.

That's proper insanity!!!

The input voltage could also be too low for the regulator.

The patent is the usual blowing of smoke involved with these things claiming they've done something which is unremarkable and 50 years out of date. Par for the course really.

No, Safewash 2000 but in a spray can which turns it into foam.

Minimum 18AWG for the heaters. Those current limits are free air and at serious loss. You don't want that in a 6.3V heater line. I used 1000V rated SPC wire that I twisted and then insulated all the pins on the plugs with 600V heatshrink. I hate doing this though which is why I'm trying my best to cram a Megatron into a single chassis... For the flux I use a foam cleaner from Elecrolube. Spray it on the boards and let it sit for a minute or two. Then brush them and then rinse under a running tap. Let them sit for a couple of days to dry.

I would just swap them out as the meter presents a load and then the zeners could be acting up.

The phones plus amp are actually 3.8K$ once the introductory pricing is over. That's a shitload of money for something that runs for just 7 hours.