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eXStata DIY Electrostatic Amp for Intermediate DIYers - Page 7  

post #91 of 2969
those are the ****!
post #92 of 2969
Yeah but how much do they cost?
post #93 of 2969
probably 1/5th of the amp
post #94 of 2969
Quote:
Originally Posted by ericj View Post
Yeah but how much do they cost?
They do look a might bit pricey!
post #95 of 2969
I heard the Exstata at RMAF, yesterday. This is a heart-breaker, it sounds so good. Moreover, it is "relaxing" and has a nice "lilt" to it. Dead quiet, by the way.

I hope it comes to market.

The "maker" was a very nice guy and I wish him all the luck.

Yes, I heard it through a bunch of a ELS headphones, but it is the amp not the phones that made the biggest impression on me, personally.
post #96 of 2969
very exciting
post #97 of 2969

RMAF report on eXStata!

The eXStata is a great amp, but it was so highly detailed that we could hear jitter (grainy griity in the highs) with the Apple TV on Saturday, which at first was more difficult to pick up with the GES until 3 hours into the meet, making us have to change the transport to a Macbook Pro instead (big improvement). I posted about this in the CanJam @ RMAF impressions thread Saturday.

Although much better with a new transport, it was still a bit bright with my PS Audio Digital Link III, and more suited to the O2 Mk1. Also we think the PSA was overdriving the XLR inputs which we measured on Sunday at 5v @ 60Hz. So on Sunday (today) Bill started the day with a DIY Opus DAC, and that fixed the sound completely. At that point the amp was very good to my ears with O2 Mk1, Jade, SR-404 LE, HE60, Smegma Pros (woody Gamma pro), SR-404 LE, and SR-Lambda normal bias.

Being in a separate rig than the GES on Sunday made it more difficult to compare the amps like we did on Saturday. But on Saturday (with the same source and side by side) we felt the Woo's timbre and tone/Frequency balance was better, but the soundstage and separation was much better with the balanced eXStata (with a little more power too). With the Opus DAC the brightness/thinner sound became more balanced and punchier in the bottom end, and with even more power - enough to tickle your ear drums and make the skin on your face vibrate with O2's. I thought that wiatrob had modded the amp overnight, the improvement was so dramatic!

Today, at the end of the meet, we tried the CullenCircuits modded PS Audio which was better with the eXStata than the stock PSA, but the Opus DAC seemed to have the best synergy with it to me. I picked my PS Audio DLIII initially because it was what I needed to brighten up the dark sounding O2 Mk1 with the GES (after rolling brighter tubes). What works for the GES isn't always the best for the eXStata. I was very impressed with the eXStata by the time we had sorted out all the jitter/synergy issues with the transport and DAC. Even if nothing gets changed in the design, this amp will still be a big hit, and my understanding is there are still a few things that can be done to make it even better. The listener just needs to remember that with this amp whatever you feed it is VERY important, because it will be so resolving that you will hear any issues - for example it was fairly bad with 192k MP3 files on the Cullen modded DAC owner's PC, and we had to switch to a CD transport to evaluate the amp with the Cullen modded PSA DAC.

It's caused a dilemma for me because I was thinking I would have to sell my GES, WA6, K1000 and RS-1 for a Woo WES, and now maybe all I really need is to add an eXStata (and EHHA for K1000) to what I already own, and just sell the APS V3 RS-1 to cover the cost.
post #98 of 2969
Oh so the eXStata had no issues driving the O2 or some of the more demanding headphones? I remember that that was a point someone brought up when the design was first being tossed around but that's impressive.

Honestly can't wait for this...
post #99 of 2969
Well, during the brainstorming phase i'd said something like we didn't want "drive the O2 to within an inch of it's life" as a design goal because, imho, this is the sort of objective that leads to 'stat amps that have a $2000 BOM.

The eXStata performs well beyond expectations.
post #100 of 2969
Quote:
Originally Posted by Emooze View Post
Oh so the eXStata had no issues driving the O2 or some of the more demanding headphones? I remember that that was a point someone brought up when the design was first being tossed around but that's impressive.

Honestly can't wait for this...
We listened with almost every set of stats at the meet (save Ray Samuel's HE-90s).

I think almost everyone who heard the amp with them would agree it had no trouble driving O2s. Bonus!

I wish we had a set of 950s there...
post #101 of 2969
Yeah, I'd have loved to have heard the 950s as well.

We need to talk about me getting one of these for keeps, Bill. I had a dream about it
post #102 of 2969
The eXStatA is a perfect fit for the ESP950.

Its like they were made for each other.
post #103 of 2969
Quote:
Originally Posted by sachu View Post
The eXStatA is a perfect fit for the ESP950.

Its like they were made for each other.
Ok, where's the board signup list!!??
post #104 of 2969
Get in touch with Bill (wiatrob/Spruce Canyon Labs)-- the distribution for this amp might be a little out of the ordinary.
post #105 of 2969
Quote:
Originally Posted by Emooze View Post
Oh so the eXStata had no issues driving the O2 or some of the more demanding headphones? I remember that that was a point someone brought up when the design was first being tossed around but that's impressive.

Honestly can't wait for this...
Like I said before, it had no problem driving the O2 Mk1 at all. Everything else was also a piece of cake (Jade, HE60, SR-404LE, SR-Lambda Signature, SR-Lambda, SR-Gamma Pro with wood cups/O2 Mk1 pads. It could cleanly drive the O2 loud enough with infected mushroom to vibrate the skin around my ears and tickle my ear drums. It was quite sensitive to the sound of the DAC and transport being used - ruthless in fact.

Quote:
Originally Posted by wiatrob View Post
We listened with almost every set of stats at the meet (save Ray Samuel's HE-90s).

I think almost everyone who heard the amp with them would agree it had no trouble driving O2s. Bonus!

I wish we had a set of 950s there...
950's are as easy to drive as a Lambda Sig, and since it can sound good with my HE60 then the ESP-950 would be a no brainer.

Quote:
Originally Posted by Sherwood View Post
Get in touch with Bill (wiatrob/Spruce Canyon Labs)-- the distribution for this amp might be a little out of the ordinary.
Don't forget I'm already first in line.
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