[qusp]

hmmm, wasnt expecting a turn on thump

and not a small one by the sounds of it either. I dislike this as generally leave my JH13 plugged in. guess i'll have to form a new habit.

 

[Jalo]

Quote:

Originally Posted by qusp /img/forum/go_quote.gif hmmm, wasnt expecting a turn on thump and not a small one by the sounds of it either. I dislike this as generally leave my JH13 plugged in. guess i'll have to form a new habit.

If you turn the volume pot down before power on, will that solve the problem? Or it doesn't matter what position the volumn pot is at, any power will give you that turn on thump?

 

[cheemo]

Quote:

Originally Posted by Jalo /img/forum/go_quote.gif If you turn the volume pot down before power on, will that solve the problem? Or it doesn't matter what position the volume pot is at, any power will give you that turn on thump?

Even at 0 setting on the vol. pot, the pop/thump is very noticeable. I would be concerned with the tiny armatures in iems/customs suffering possible damage from the sudden power surge. Whenever I turn on the amp, I have been unplugging my iems/hp's FWIW.

 

[cheemo]

Quote:

Originally Posted by cooperpwc /img/forum/go_quote.gif I'm confused now. (Or even more confused than usual...) The feature that returns the volume to previous level is gone but the volume control has an indcator line. Does it not follow that when you turn the Pico Slim on, the volume returns to the point indicated by that volume control indicator line?

The volume level will remain at the level it was left at prior to shutting the amp off.

 

[Jalo]

Quote:

Originally Posted by cheemo /img/forum/go_quote.gif Even at 0 setting on the vol. pot, the pop/thump is very noticeable. I would be concerned with the tiny armatures in iems/customs suffering possible damage from the sudden power surge. Whenever I turn on the amp, I have been unplugging my iems/hp's FWIW.

But then plugging and unplugging a headphone while the amp is on is not suppose to be wise either.

 

[WalkGood]

Plugging and unplugging your iem's while the amp is on results in a similar pop and I would think possibly worse for your armatures than already having them plugged in at start up.

 

[boomana]

I simply turn the amp on before I put my iems in my ears. It's a pretty easy solution.

 

[JiPod]

Don't hurt me now. A slightly off topic question.

Between the Slims (Pico/TTVJ), which of the two is better prepped to drive serious cans the likes of the HD600, nada, nada, nada?

 

[LintHart]

Quote:

Originally Posted by JiPod /img/forum/go_quote.gif Don't hurt me now. A slightly off topic question. Between the Slims (Pico/TTVJ), which of the two is better prepped to drive serious cans the likes of the HD600, nada, nada, nada?

AFAIK, the Pico Slim was not designed to drive full size cans. That's not to say it can't but correct me if I'm wrong please guys but it's aimed at IEMs

 

[gsawdy]

Quote:

Originally Posted by boomana /img/forum/go_quote.gif I simply turn the amp on before I put my items in my ears. It's a pretty easy solution.

for your ear drums, but doesn't solve the problem for the armatures in the IEM. I must add that I ordered the Pico Slim based in large part on the reputation of Justin's other products and I'm disappointed with this thump--sure didn't expect he'd release a product with this issue.

Can anyone measure the frequency of this thump? Does it have high frequency content and are high frequency armatures more sensitive like tweeters?

For those who had access to samples did this problem exist or was it masked by the slow ramp up of the volume? I understand that the volume increase could be annoyingly slow but as I understand digital volume control that should be a software problem and solved by new software, i.e., increase the speed of the ramp up.

Hope to hear from others on a possible fix, George

 

[qusp]

NVM, i'm hoping for a solution too. at least with those caps on the output its unlikely to have a DC component

 

[shigzeo]

Quote:

Originally Posted by qusp /img/forum/go_quote.gif hmmm, wasnt expecting a turn-on thump and not a small one

That's what she said?

 

[WalkGood]

Quote:

Originally Posted by boomana /img/forum/go_quote.gif I simply turn the amp on before I put my iems in my ears. It's a pretty easy solution.

I agree with your method and that is what I have been doing. I made the statement yesterday that it didn’t bother me, but let me qualify this statement. If this thump or pop is bad for my armatures then yes it does bother me and I too would like a solution, so I fully agree with gsawdy’s statement (post # 160). I’ve been very happy with my standard Pico/DAC and this is not an issue with it, I can have my customs in my ears turn it on and the power up sound is negligible. That said, I can not have my customs on during the power up with the Slim ...


Quote:

Originally Posted by JiPod /img/forum/go_quote.gif Don't hurt me now. A slightly off topic question. Between the Slims (Pico/TTVJ), which of the two is better prepped to drive serious cans the likes of the HD600, nada, nada, nada?

For a full size headphone solution, the original Pico would be a better solution, it has both low and high gain, it drives my hd650’s (300 ohms) fine …

 

[gp_hebert]

Just got mine, I love the form factor and the look of it! Super precise volume control, probably the most quiet portable amp I've heard and no noise when changing volume (unless you go to ear bleeding levels). Very pleased so far.

 

[qusp]

Quote:

Originally Posted by shigzeo /img/forum/go_quote.gif That's what she said?

yer momma? she did yes