See for yourself, http://aptecpro.com/Xenos-Prod/X1HA/...ntro-page.html

It looks like it's going to be the next output driver chip to settle in my Xenos 0HA-REP amp. http://focus.ti.com/docs/prod/folder...t/ths4031.html Feel free to comment (please!! ).

Just wanted to report my satisfaction with the mod - which includes the AD8058 in place of the former AD8397, plus new Panasonic FM 470uF/35V caps in place of the former 1000uF/25V FC's. All powered @ 12V. This is my best Go-Vibe ever. Interestingly it's better sounding than both the modified...

Since it's the last, latest, definitive...and I won't open up this amp anymore, I thought I'd post a pic of it for the sake of history Including: AD823 + 2x AD8397ARDZ ; AD825 rail splitter ; no more regulator/charger. (supply voltage is now free to go up till say 24V)

Here's Alberto's reply to my inquiry about this possibility. Quote: Yes, we had a look at doing customized as a special order feature and we can for a price of course and on a limited basis (small orders). Not sure yet how much of a market there would be though, will be interesting to...

I rolled in my 2nd, very-tweaked Xenos 0HA-REP, the AD746 -> AD8620 -> OP285 in a row. Surprisingly, with an increasing liking. The AD746 was too smooth, yet not warm enough in tonality. The AD8620 was pretty good if it weren't too 'skeletal' to be true The OP285 was a mixture of the former two...

You may know that lately I played with my Go-Vibe quite a bit. My PINT^fied Go-Vibe deluded me lately, when I rolled the AD8055 in, into thinking that I'd finally succeeded in making it sound natural and satisfying. Extended listening diminished my enthusiasm and led me to the ineluctable...

And I'm happy as if it were the first time. Especially after the bad luck that the previous package had met with at the Italian Customs. Alberto promptly sent a replacement amp and... here it is, safe in my hands. Well not exactly... I still have to open the package I'll post my...

Is it 'musical' like a proper "audio op-amp" ? Is it similar to the AD8066 (which is less musical, for my ears) ? Is it worth it to replace an OPA2134 with it? Thanks for answering

I wanted to report a brief experience... I just listened to my brother's Samsung 20 GB DAP (playing .wav songs by XTC & John Mellencamp) with & without the PengAmp in between, and with the ATH-M40fs headphones terminating the 'chain'. With the PengAmp (LM6171) the sound was powerful...

My doubt is concerned with this op-amp's 2.5 uA input bias current alone. This isn't a problem, correct? The ground channel's topology is the same as the Pimeta's (but with the THS4051 doing both the op-amp & the buffer), only with smaller value resistors in place of the two 4.32K ones. This...

A little bit blurred? I did it with Paintbrush. The two resistors in the feedback loop are 1K ohm. The bandwidth limiting capacitor, being SMD, I can't know what value it could be. The series resistor at the output is 6.8 ohm. Of course, the impedances on the + and - inputs have been well...

...when there aren't any oscillation problems? I've just modified my Go-Vibe, that now has an AD8397ARDZ (exposed pad version) for the LR channels and the stock LM6171 for G. It sounds really great @ 24V. The AD8397 warms up like it's supposed to do with a 11 mA per channel quiescent current...

Not much to laugh about in fact I've switched all chips in my Xenos 0HA-REP. The OPA2134 for and AD8620BR, and the two LMH6642's for two LT1363's. I'm superhappy!! I've always loved the LT1360/1/3/4 series of chips, and their goodness is more than confirmed once again. With...

I was quite surprised to find out that the LDM+ pairs 'infinitely' better than my Portaphile (see my sig) with the HD485. Today I was listening to Nick Cave, "Abattoir Blues" (played by my Panasonic SL-CT720 PCDP) With the Portaphile the midrange felt rather distant, as it got drowned...

I've been listening to Gillian Welch, " Time (the Revelator) " And the sound was magical...

Read here, http://www.aptecpro.com/Xenos-Prod/C...prod-list.html That's sweet news... It's just the right price & the right specifications for a definitive portable amp purchase for me...

These video op-amps with 100 mA current output seemingly have very "audio friendly" specs too. I've a few 4051 on order. For driving headphones directly, these might well better the LM6171. The only concern I have is about the 2.5 uA typical input bias current (but the input offset...

and I'm excited. Pity for today's hot weather. Headphones and stuff will have to wait for the twilight breeze

in an unbuffered headphone amp? The specifications say: 70 mA linear output current, FET input, 8 MHz, 20 V/us (& 0.0005% THD+N although not on a headphone load of course ). It looks perfect for the application, all the more so when it should drive a 300 ohm headphone like in my case...

And I'm going to give it a first listen as soon as the temperature gets a bit cooler down here, so that I can put a headphone on my head again The only thing I can say for now is that it looks extremely cute in person (mine has silver finish), much more so than in photos, and very solid...

(yes I know this is roughly a copy of another recent thread) I'm planning an op-amp upgrade (likely two OPA627) and a (diy) power supply upgrade too. For a budget strictly within $200 including shipping, do you think there's anything better on the planet that I should rather go for? Speak now...

The announced revision of the entry level Xenos 0HA-R is finally up on www.aptecpro.com . The "audiophile" EP version is a pleasant surprise! Prices range from $60 to $90 for just the amps. 0HA-RHP , with TI 5532 gain op-amp. 0HA-REP , with OPA2134 & a few other tweaks...

I haven't had the opportunity to try these (or the OPA552) yet, but I continue to be intrigued. I'm waiting to find out a decent cmoy derivative on ebay to stick 'em in To anyone who has tried them, how do they sound used as "buffers with gain" ? Do they truly compete with (or better) a...

These capacitors aren't much talked of here. Looking at the datasheet, they show a lower ESR than the Panasonic FCs or Nichicon PWs, though sizes are a little larger. Their "endurance" is also very good, reaching as many as 10000 hours for the larger values. They seem to be rather cheap, to...