[justin w.]

Quote:

Originally Posted by TheMarchingMule /img/forum/go_quote.gif Huh...at first I thought you were going nuts (who isn't these days?), but now I see what you mean. Ray's signature red covering is realistically evident on the Predator, but the Pico just looks like a perfectly straight black square with no depth or lighting to it. Perhaps nobody is sure if there is a green light to let the Pico bare all?

i have no problem if he shows the full circuit board, i didn't ask him to cover it up

 

[d-cee]

Quote:

Originally Posted by TheMarchingMule /img/forum/go_quote.gif Huh...at first I thought you were going nuts (who isn't these days?), but now I see what you mean. Ray's signature red covering is realistically evident on the Predator, but the Pico just looks like a perfectly straight black square with no depth or lighting to it. Perhaps nobody is sure if there is a green light to let the Pico bare all?

Quote:

Originally Posted by justin w. /img/forum/go_quote.gif i have no problem if he shows the full circuit board, i didn't ask him to cover it up

yeah I know ray's been doing it for a while, but didn't know if justin was too or it was requested by Justin to cover them, but that's clarified now.

 

[Asr]

Quote:

Originally Posted by d-cee /img/forum/go_quote.gif do some of the chips on the pico have black squares covering them, or did you photoshop those in

I added those in, for completely personal reasons.

 

[TzeYang]

, so you cant reveal the blackened opamp ??

It'll be nice to see how manufacturers interpret the "sound demand" though.

Times like these, i can only slap myself for diving into DIY, wasting piles of cash instead of buying beautiful amps like these, and never have to think about anything else.

 

[basman]

How about those Caps?

Predator: Nichicon 15000uF

Pico: ????

Thanks!

 

[justin w.]

The Pico capacitor you see is 1000uF, but it's purpose is probably different. It stays charged and absorbs turn-on surge that comes from the headphone amp. This prevents the li-ion charger from being fooled into thinking that the surge current from turning the amp on is an empty battery that needs to be filled. It really isn't of any use as a power supply capacitor, where it would just lower battery impedance. The impedance of a li-ion battery is so low the capacitor will do nothing to help. Might filter a little AC noise when the DC adapter is plugged in, but thats about it

 

[d-cee]

Quote:

Originally Posted by Asr /img/forum/go_quote.gif I added those in, for completely personal reasons.

I respect your decision. Do Justin's comments change anything though?

 

[basman]

Quote:

Originally Posted by justin w. /img/forum/go_quote.gif The Pico capacitor you see is 1000uF, but it's purpose is probably different. It stays charged and absorbs turn-on surge that comes from the headphone amp. This prevents the li-ion charger from being fooled into thinking that the surge current from turning the amp on is an empty battery that needs to be filled. It really isn't of any use as a power supply capacitor, where it would just lower battery impedance. The impedance of a li-ion battery is so low the capacitor will do nothing to help. Might filter a little AC noise when the DC adapter is plugged in, but thats about it

Thanks Justin for the valuable information.

 

[Filburt]

Are those X7R caps on the output of the Predator's DAC board?

 

[jamato8]

Quote:

Originally Posted by justin w. /img/forum/go_quote.gif The Pico capacitor you see is 1000uF, but it's purpose is probably different. It stays charged and absorbs turn-on surge that comes from the headphone amp. This prevents the li-ion charger from being fooled into thinking that the surge current from turning the amp on is an empty battery that needs to be filled. It really isn't of any use as a power supply capacitor, where it would just lower battery impedance. The impedance of a li-ion battery is so low the capacitor will do nothing to help. Might filter a little AC noise when the DC adapter is plugged in, but thats about it

So the Pico relies on the battery, which is a capacitor, for all of its supply and does not use a larger cap in the PS? Interesting. If the Pico runs off of the charger, after the battery is charged, what capacitive reserve is there to lower the resistance for the current supply to the components?

 

[dap_pad]

Wow... I wish I lived near you to see and hear them in person... you are so lucky!!! They look awesome btw and your pictures are done quite well!

 

[Edwood]

Quote:

Originally Posted by justin w. /img/forum/go_quote.gif The Pico capacitor you see is 1000uF, but it's purpose is probably different. It stays charged and absorbs turn-on surge that comes from the headphone amp. This prevents the li-ion charger from being fooled into thinking that the surge current from turning the amp on is an empty battery that needs to be filled. It really isn't of any use as a power supply capacitor, where it would just lower battery impedance. The impedance of a li-ion battery is so low the capacitor will do nothing to help. Might filter a little AC noise when the DC adapter is plugged in, but thats about it

Quote:

Originally Posted by jamato8 /img/forum/go_quote.gif So the Pico relies on the battery, which is a capacitor, for all of its supply and does not use a larger cap in the PS? Interesting. If the Pico runs off of the charger, after the battery is charged, what capacitive reserve is there to lower the resistance for the current supply to the components?

Read a little closer.

-Ed

 

[akwok]

From asr's photos, the Predator's insides look a bit empty in comparison...

 

[jamato8]

Quote:

Originally Posted by Edwood /img/forum/go_quote.gif Read a little closer. -Ed

I did. I am wondering about using it while on the ac adapter as the battery is out of the circuit, from what I understand, once it is charged.

 

[Asr]

Quote:

Originally Posted by TzeYang /img/forum/go_quote.gif , so you cant reveal the blackened opamp ??

Well I won't, but that doesn't mean one of the other Pico owners can't.

Quote:

Originally Posted by d-cee /img/forum/go_quote.gif I respect your decision. Do Justin's comments change anything though?

Nope. I'd prefer to keep the pics as-is, again for completely personal reasons. But like I said, there are plenty of other Pico owners.