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ALO Pan Am desktop/portable headphone amp/DAC: Impressions and Reviews - Page 39

post #571 of 1109
Thank you, I ordered a pair of the Slyvania's to try although I'm close to spending almost half of what I spent on the amp in tubes. Oh well, that's the fun of the hobby.
post #572 of 1109
I'm interested in having your comparison with the Russians tubes
post #573 of 1109
I felt the Russians were to harsh & bright with the AKG's but have not re listened to them with the HE-400's I found them to be a pretty aggressive sound signature with some peaks that really grated on me but it's possible the HE-400's may smooth them out a bit.
post #574 of 1109
I have the russians tubes also and with the lcd2's the slight aggressive presentation pairs well with the phones

The Mullard cv 4010 are good but just a litlle to smooth
The siemens lack bass slams and low end in general

I'd like to know how the sylvanias sound (treble medium and bass) in comparison
Thanks
post #575 of 1109
Quote:
Originally Posted by Fishwater View Post
 

I'm trying to figure out this amp. So far regardless of the tubes I have used it is brighter than I expected. I realize my Q701's are bright sounding but I don't find it as pronounced with either my E17 or Sansui AU-717 integrated amp. I also find the sound a touch bright with my HE-400's but obviously not as much as the AKG's. So far I have tried the stock tubes, the Russians, the Siemens & GE's. I have a set of Mullards on the way as my last set didn't make it through shipping. I am hoping the Mullards tone it down some & give me the lush sound I am looking for. How does everyone else find the sound signature of the Pan Am overall?

I had exactly the same impression at first with my Heir Audio 8.A IEMs. The amp was too bright with the stock tubes. The Mullards changed that. The bass is excellent, clear, and full, while the highs are slightly more subdued, in a pleasing way. If you find the unit too bright, the Mullards may be the remedy you need. It did take a week or two for the tubes to open up. Now, that I've been running them for around 6 months several days a week, I am very satisfied with the PanAm. I find it much more pleasing to listen too than my Hifi-M8.

post #576 of 1109
For hifiman he 400 or Akg 701 I would choose Mullards cv 4010 m8100

For audeze lcd 2.2 the Voskhod 6ZH1P-EV
post #577 of 1109

what about for hd600?

post #578 of 1109
depends on what part you want to highlight

I suggest Mullards CV 4010 too for the bass sub bass, silky mediums and smooth highs
post #579 of 1109

Anyone give this a whirl with a self-wired pack of AA's? Curious to see how it sounds since I can probably rustle some up for cheap. Current Passport pricing is WAY higher than my curiosity level.

 

Quote:

Originally Posted by ahhui90 View Post
 

I don't see the need for AA batteries, try using Astro external battery packs which outputs 12 volts.

Which Astro did you end up using? How long did it last on one full charge? From some minimal browsing it sounded like some Astros won't output power while charging. That seems kinda inconvenient for non-portable usage.

post #580 of 1109

Anyone tried tall tubes on pan am? I saw a post stating that a 6dt6 will run on ef95 mode on pan am.

post #581 of 1109

Looking to pick up Mullard/Voshkods if possible.

Exactly what should I look for in selecting a source for tubes? I've seen a few posts where people have ordered matched tubes only to find that they aren't well matched at all. Definitely don't plan on buying enough tubes to warrant my own matcher.

 

Can anyone recommend a source for matched tubes?  (PM is fine too)

 

Found this thread right after I posted, of course:

http://www.head-fi.org/t/563884/little-dot-tube-amps-vacuum-tube-rolling-guide#post_7625995

 

*EDIT* Linked Little Dot Rolling Guide.


Edited by BeyerMonster - 5/9/14 at 12:13am
post #582 of 1109
On ebay you can find lots of them

Got mine from Ukraine 3 weeks ago and are perfectly matched and are great

If Ukraine sounds like problems because of what you see on tv mine took less than 2 weeks to get here
post #583 of 1109
I paid 20 $ total for the matched tubes + shipping


48 Jul-75 la1 : 6,8 S1 : 5,1
64 Jul-75 la1 : 6,8 S1 : 5,1

were 100% is: Ia = 7.35mA, S = 5.15 mA

Tested on L3-3 tube tester (Un=6.3V, Ua=120V, Uc2= 120V)
post #584 of 1109
Thread Starter 
Quote:
Originally Posted by TontonJoK View Post

I paid 20 $ total for the matched tubes + shipping


48 Jul-75 la1 : 6,8 S1 : 5,1
64 Jul-75 la1 : 6,8 S1 : 5,1

were 100% is: Ia = 7.35mA, S = 5.15 mA

Tested on L3-3 tube tester (Un=6.3V, Ua=120V, Uc2= 120V)

PRetty damn good deal.

post #585 of 1109

Out of curiosity, if I were to use the Gateway and Passport in a chain (ie. Gateway > Passport > Pan Am) would that be OK? Basically, the Passport would be constantly charging (and discharging if in use). I assume that the battery life might suffer a bit over time, but that's not something I really worry about.

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