spritzer

When Stereophile measured the DAC64 it had a 3.1/6.2v output voltage and I can't find any for the D-05. Can look in the owners manual under specs?

Ehhh it looks like I missed this one. The impedance is in the kOhms but the output impedance should be much lower. The board just contains current limiting resistors while the transformers step up the voltage and impedance. Since the voltage step up ratio is 25 then the impedance stepup is 252 or 625 so a 8 ohm input is 5kohm at the output. I'm waiting for the A version to reach the much more experienced Stax nuts in Japan but first impressions are that the new phones are an upgrade but a small one. I wasn't expecting much else though as they were just fixing the few problems that had arisen over the 9 year life of the Mk1.

Ehhh how the hell can it be unfluorinated since the most common teflon is Polytetrafluoroethylene (PTFE) and all forms of teflon are built around flour molecules. The big deal is to be rid of the teflon all together but if it doesn't contain flour it isn't teflon. With the 6N and cryo bullshit they are just luring people in that think bigger is better. Why not use a 4N wire and have longer grain so you don't need to cryo in the first place. That's the feedback I've got from people who's ears I trust. Extremely warm, mushy sound but some people do like that or rather think they do.

Hmmmm that good hahh? I think I need to get me some...

...and there is no reason for the price. It's just stranded copper

Very nice Michael!!

That's what I was planning to do, running every tube off its own PSU. The cost isn't really an issue here but I'd like to use DHT's that are relatively cheap which the 845's aren't NOS. With my headphone collection almost complete it's time to build an amp to drive them all.

Ahhh since its in US$ you get payed by the seller to be rid of them...

The 807's aren't cheap, they're dirt cheap. I bought them to build a cheap P-P speaker amp that could serve as a Stax amp but now I'm tempted to test them in the BH circuit... \

Wuss... I like the Furutech products a lot but since I'm going SE only in the future WBT Silvers it is.

If you want the best and are willing to pay for it look here. They can make the connectors with silver pins if you have the cash.

Thanks for the info. Have you been buying some RK50's?

I'm always ambiguous... The EL34 is far from being the best pentode out there but a Mullard XF2 is a force to be reckoned with. Expensive as hell so I'm all for a cheaper type that sounds as good so please do some testing... since I can't be bothered to butcher my BH. Btw. Kevin have you finished the 845 based amp circuit yet. I'd really like to see it when you do.

You certainly could alter the circuit a bit and install different tubes but none of them sound as good as the EL34. Since we are on the subject of pentodes I just bought a quad of JAN 807's and I'm going to see if I can't throw something together.

That's just too cruel to say...

If it is French then I'm going the other way... ....

They are both loud acoustically and contaminate electricity in a very bad way. That has to change before they can start to gain some headway against the silver disk. It could be possible to use galvanic isolation and create a clean room inside the computer before the signal is lifted out and have the computer on a different PSU...

Whats not to like, huge DIY tube amps and Quad ESL speakers... my view of heaven... :'(

Much better! I can understand that they are a bit sensitive about that as something original that is made in China is quite rare indeed. Rip apart and modify... Depending on how the new ones will turn out I think there is some ground for improvement... maybe quite a bit even. On a side note if there is some thing not clear about the ES principle, ask away.

It's very hard to beat the direct connection to the drive especially if crap like Toslink is used. The upcoming APL DAC will have some propitiatory link to a from a modded transport so if they can do that in some PCI card then it would be awesome. The horrible environment of the PC is still to be dealt with but an external PSU for the PCI card could be an option...

ETF is one of the few audio shows I'd like to attend. Lats year some engineers at Philips recreated the original triode to celebrate its 100. anniversary and they even built an amp around it. Way too cool!

A lower resistor would possibly lead to arcing and if something does go wrong it is there to protect you as it burns up with very little current going through it. The HEV amps are not matched to the HE phones in any way. The only way an amp can hurt ES phones (ESP's?) is by arcing them with too much output voltage. That simply isn't going to happen with any of the amps currently avaialble. The HEAudio 1.3 is in no way, shape or form a HE90 clone so they shouldn't be compared like that. The construction is very different and it is hard to speculate about them unless I have spent sometime with them here and disassembled them.

Some are more complicated then others. The whole fault with Sony units was a horrible output stage and some questionable things on the dac boards. A normal eXemplar or Modwright mod is a new clock and outputstage with a replacement of a number of components but it's pretty far from a complete redesign. They still do solid work at a lower price and that is to be commended. Some of the other modders... are more questionable. I can't wait to get mine... This is certainly true as most modders are spread very thin with a lot of different manufacturers and not very many units of any one kind but APL stopped doing that a long time ago. If my Denon will need to be repaired it will go back to APL. I know they have been replacing drives and all the usual stuff that fails and they will continue to support it. Some of the modders aren't as helpful to say the least...

Going with those comparisons I've read they don't stand a chance. They are after all simple mods while the APL is a complete rebuild. Why on earth not? You get much better service and better bang for your buck. The product is never outdated as if there is a new version you just send yours in to be updated. The APL gear isn't really a modification as they are working with Esoteric so i would much rather call it a rebuild, doing things Esoteric could never do and stay profitable.