[Anders]

Quote:

Originally Posted by spritzer /img/forum/go_quote.gif One bit of news for the Stax fans. I've almost finished drawing up a SRD-7 Pro bias supply PCB which should fit every SRD-7 unit and equip it for Pro bias. While this is for my own use I may sell off some of the excess boards if there is interest.

Tempting, it seems difficult to find a SRD-7 Pro while there are lots of non-Pro on the used market. At least when I looked around a year ago.

 

[Duggeh]

Quote:

Originally Posted by spritzer /img/forum/go_quote.gif The x-factor for the 4070 now are the new thick leather earpads for the SR-404LE. The thicker material should isolate better and may bring out the bass a bit. I know Stax is dealing with some supply issues now but the pads will be available for sale later on.

This bodes well with regard to my secret progressions on the AMT headphone. The pads (thanks entirely to you my firend I have facililty for comparisons that are meaningful) contribute vastly to the overal sound.

If these -LE leather pads make it as a part for order. I'd certainly be in the queue.

 

[webbie64]

Quote:

Originally Posted by Duggeh /img/forum/go_quote.gif This bodes well with regard to my secret progressions on the AMT headphone. The pads (thanks entirely to you my firend I have facililty for comparisons that are meaningful) contribute vastly to the overal sound. If these -LE leather pads make it as a part for order. I'd certainly be in the queue.

Pad-rolling! What a great approach. (I'm already a fan of tube rolling and opamp rolling

).

Please post your suggested pads for Sigmas, Lambdas and Gammas plus any general guidance your experimentation so far has ID'd (particularly interested in whether this approach might get better bass out of the Gammas whilst retaining their mid and upper range strengths

).

 

[Duggeh]

Quote:

Originally Posted by webbie64 /img/forum/go_quote.gif Pad-rolling! What a great approach. (I'm already a fan of tube rolling and opamp rolling ). Please post your suggested pads for Sigmas, Lambdas and Gammas plus any general guidance your experimentation so far has ID'd (particularly interested in whether this approach might get better bass out of the Gammas whilst retaining their mid and upper range strengths ).

Never had a Sigma (sadly). Only had an SR-202 (LOVED IT) never owned a Gamma. Never did any pad-rolling on the 202. Sorry I can't help you out.

The AMT is, putting it politely. A tricky and fussy person.

 

[lyricalmoments]

Quote:

Originally Posted by spritzer /img/forum/go_quote.gif 240 is indeed 2 and 5.

Thanks big time again spritzer, you're the man!

Managed to move the jumper with a w/o having to take out the PCB. Switched on power, no boom bang, no smoke

Unit now runs noticebly cooler at 240v (only the top plate near the grilles get hot), so far 2 hours straight w/o shutting off. Let's see if it can hit about 4 hours

 

[gilency]

I know for many is not Kosher to tweak sound with equalizer settings, but I did in iTunes, just increased the frequencies between 32 and 500 just a notch or less and to my ears the 404 sounds just perfect. I am listening to Mozart's Cosi Fan Tutti and the soundstage is amazing. I have listened to Bach and Shirley Horne for hours today with no fatigue, enjoying minute details I did not know were there. The 404's being my first Stax ever I am just amazed at how clear everything sounds. When the upgrade symptoms return, I think I will start with the amplifier first, selling the SRD-7 MKII and the SRM-006t in exchange for........ not sure yet....mmmhhh!
One more thought: in the JH13 thread there is a lot of talk about how that particular IEM is so good there is not need to have any large headphones and many people state they are selling their large dynamic cans. I have the Westone ES3X and love it for its beautiful sound and convenience of listening to it when I am by the pool or I need mobility, but I would never dream of getting rid of my Stax for a dynamic phone or an IEM.

 

[audiod]

Quote:

Originally Posted by spritzer /img/forum/go_quote.gif One bit of news for the Stax fans. I've almost finished drawing up a SRD-7 Pro bias supply PCB which should fit every SRD-7 unit and equip it for Pro bias. While this is for my own use I may sell off some of the excess boards if there is interest.

Birgir, Put me down for one. I was doing the same thing but never finished.

 

[spritzer]

Quote:

Originally Posted by lyricalmoments /img/forum/go_quote.gif Thanks big time again spritzer, you're the man! Managed to move the jumper with a w/o having to take out the PCB. Switched on power, no boom bang, no smoke Unit now runs noticebly cooler at 240v (only the top plate near the grilles get hot), so far 2 hours straight w/o shutting off. Let's see if it can hit about 4 hours

Glad to know that it works.

Quote:

Originally Posted by audiod /img/forum/go_quote.gif Birgir, Put me down for one. I was doing the same thing but never finished.

Sure thing, just have to make sure the damn thing works first.

Once I'm happy with the design then I'll order up a dozen or so boards and test them.

 

[kintsaki]

If it is not too much trouble I would like to be included also and I will of course contribute financially


Quote:

Originally Posted by audiod /img/forum/go_quote.gif Birgir, Put me down for one. I was doing the same thing but never finished.

 

[HeadphoneAddict]

Quote:

Originally Posted by HeadphoneAddict /img/forum/go_quote.gif Good Job! I'd always be up for one of those PCB when you decide if you have extras to sell. Cheers!

Spritzer, in case you missed this yesterday.

 

[manaox2]

Spritzer, I have an SRD7SB I would be interested in buying a PCB for.

 

[Keithpgdrb]

Quote:

Originally Posted by manaox2 /img/forum/go_quote.gif Spritzer, I have an SRD7SB I would be interested in buying a PCB for.

I was under the impression that this mod did not apply to the sb version. if it does, I am also interested.

 

[webbie64]

Quote:

Originally Posted by Keithpgdrb /img/forum/go_quote.gif I was under the impression that this mod did not apply to the sb version. if it does, I am also interested.

Agreed. I also thought it was only for Mains powered Energisers. If you're making PCBs to upgrade the SB version too then I would also be interested in that experiment.

Also, could these PCBs be adapted to, say, create a Pro version of a mains powered energiser with even higher bias - eg 600 volt on one ESP outlet and 620 volt on the other?

 

[manaox2]

Quote:

Originally Posted by Keithpgdrb /img/forum/go_quote.gif I was under the impression that this mod did not apply to the sb version. if it does, I am also interested.

Oops! If so, my bad.

 

[lyricalmoments]

Anyone knows the rating of the slow blow fuse for the stax 717? It's the one located near the transformer. Brought the fuse out to bring it to the hardware store, but looks like I've dropped it in my friend's office... Duh

there are also 2 more fuses near the capacitors, F1 and F2, would appreciate if anyone knows the rating . Thanks!