[DannyBuoy]

I too was looking for upgrades to do to my V181 and found this on a review:
 
"No problem with volume control but I'm a upgrader.. I think it would go better with a step resistance volume control.
This is the link for the one I would change.
http://www.khozmo.com/products_dale_ladder.html
I don't know which one.. I hope somebody can help me.
Thank you,
Matteo"
 
I am not sure of what resistance to order and how well it might fit into the case without significant mods.


 
Quote:

Anybody knows if does exist any mod for V181?
I would change the potentiometer.. do you know which impedance I have to looking for?
Thank you,
 
Matteo 

 

 

[edisonwu]

Changing the POT won't change anything.
If you want something better let's wait for the balanced V200.
 
Quote:

Anybody knows if does exist any mod for V181?
I would change the potentiometer.. do you know which impedance I have to looking for?
Thank you,
 
Matteo 

 

 

[perfidoclone]

I have tried with PS1000 and with the gain at the maximum (+12), the high frequency distorcing, if go to 0 gain the problem goes away..
Anyone have tried to change the gain if the sound go better with less gain?
Thank you,
 
Matteo

 

[musicman59]

Quote:

I have tried with PS1000 and with the gain at the maximum (+12), the high frequency distorcing, if go to 0 gain the problem goes away..
Anyone have tried to change the gain if the sound go better with less gain?
Thank you,
 
Matteo

I have the gain in my V200 at +12 and have no problems at all.
 
 

 

[Kees]

Quote:

I have tried with PS1000 and with the gain at the maximum (+12), the high frequency distorcing, if go to 0 gain the problem goes away..
Anyone have tried to change the gain if the sound go better with less gain?
Thank you,
 
Matteo

high gain is not suitable for low impedance headphones.
 
 

 

[Preload]

  Inside all our amps are NE5532 and some NE5534.
These may be rolled because they are installed in precision sockets.
But be careful: Most of these amps are doing nothing but impedance matching with Gain = 1.
Most "sophisticated" op-amps need some gain to work stresslessly.

I know this is an old thread, but now that the V181 has been out a while, has anyone had any experience rolling different opamps to replace the socketed 5532's? Would any of the following work well in the V181 circuit based on FDG's requirements above?
OPA627
LM4562
AD797
LT1028
...or anything else?
 
Thanks!

 

[fdg]

Please note that HPA V181 is discontinued.
There are only few items left on
www.Violectricusa.com.