An all triode Class A amp Review: GPinto GP-H2A

[zodiac1234]

Ahh! Ferrari Red.
 

 
... Beautiful...
 
By the way, just listened to a new kid on the block:
 
Tom Hansen and his new release:
 
Brazilian Nights
 

 
Suprisingly good Smooth Jazz. He is also a Headphile!!
 
Cheers
 
 

 

[palchiu]

After the throes of burning, I replaced better tubes. (Now with 4xJJ ECC802S) 
 

 
Truly! The soundstage is superb! Deep and wide. Even better LCD2 with EF6 that I've experienced.
 
The sound is enjoyable, that SS amp can't to be.
 
The power is no problem with LCD2, almost I listening the pot @11~12'.
 
Bad news is my favorite DAC is dead... 

 

[zodiac1234]

Yo Pal,
 
looking good!
 
 
Quote:

After the throes of burning, I replaced better tubes. (Now with 4xJJ ECC802S)

 
Right on. The original tubes are ok, but not the best by far.
 
Quote:

Truly! The soundstage is superb! Deep and wide. Even better LCD2 with EF6 that I've experienced.

 
That's what I heard too. Soundstage is MASSIVE. And the effortlessness and the clarity within that
soundstage is simply breathtaking.
 
 
Quote:

The power is no problem with LCD2, almost I listening the pot @11~12'

 
That's also what I had on the orthoaynamics --  around 10 to 12 o'clock.
 
On Sennheisers (HD800, HD600) it was around 7 - 8.
 
 
Keep the comments coming..
 
cheers

 

[vale25]

do i need set bias to change tubes?

 

[palchiu]

Quote:

do i need set bias to change tubes?

 
No needs.  Just replace them.

 

[palchiu]

Quote:

Yo Pal,
 
looking good!
 
...  
 
Keep the comments coming..
 
cheers

 
The tubes maybe different from two versions.
 
It's sounds better now, I enjoying in musics.

 
I needs to find a better source to feed the amp.
 

 

[vale25]

Guys my h2a-p sounds like without body with my sennheiser hd 800? do you know  if there is something i can do? it also lacks of definition... do you know what's the trimmer that ther is inside under the tubes?

 

[vale25]

it also  seems doesn't have power with some tracks!

 

[zodiac1234]

Quote:

my h2a-p sounds like without body with my sennheiser hd 800? do you know if there is something i can do? it also lacks of definition...

 
Seems like there is something wrong with your set-up.
 
1. Check your source:
       - Connect your source to another amp & see if it works & sounds fine.
2. Check if:
      - Right channel is correctly connected to the right ear-phone and Left to the left ear-phone
      - the ear-phones are working in phase (same polarty) very important!
3. Put the original tubes back in (if you have changed them).
4. Let the amp be turned on for a 1/2 hour.
5. Touch the tubes, they should all be warm (some warmer than other), nevertheless the all should be fairly warm to the touch.
6. Listen again. If you still have problems contact me.
 
 
Quote:

do you know what's the trimmer that ther is inside under the tubes?

 
Yeah,
Don't touch it.
 
cheers

 

[zodiac1234]

Quote:

it also  seems doesn't have power with some tracks!

 
This is odd. There seems to be something peculiar with your set-up.
 
If you're using HD800 this should NOT be a problem.
 
What source are you using??
 
cheers

 

[vale25]

hello I also thought the source is the problem  http://it.store.creative.com/sound-blaster/sound-blaster-x-fi-hd/1-19829.aspx and  now i'm using my kenwood ka 7300 pre section to drive the GPinto and the situation is much better! but i think this cannot be a definitive solution; but at the moment i don't have the money to buy  a different source... I'm courius can you tell me what's the trimer? does it  set tubes' bias?

 

[vale25]

      - the ear-phones are working in phase (same polarty) very important!
 

 
how can the phase be inverted headphones aren't modded and i'm using the original cable

 

[vale25]

      - Right channel is correctly connected to the right ear-phone and Left to the left ear-phone
 

THey were inverted I sent a mail to gpinto and they aiutorised me to invert channel  (i  inverted them at the imput selector) and now it's good but all the other problems were  there also before of this

 

[zodiac1234]

Quote:

... I'm courius can you tell me what's the trimer? does it  set tubes' bias?

 
It sets the bias for the output power tubes. Just don't touch it, as it effects the sound quality, & is difficult to optimize.
 
cheers 

 

[zodiac1234]

Quote:

 
how can the phase be inverted headphones aren't modded and i'm using the original cable

 
 
No worries then...
 
cheers