Head-Fi.org › Forums › Sponsor Announcements and Deals › HeadAmp Pico Power: Pre-Order Thread
New Posts  All Forums:Forum Nav:

HeadAmp Pico Power: Pre-Order Thread - Page 8

post #106 of 730

Please add me to the list.

post #107 of 730
Please add me to the pre-order list as well. Thanks.
post #108 of 730
Please add me to the list.
post #109 of 730
Thread Starter 

Good news everyone.  The next prototypes of the Pico Power circuit boards are here, and I believe the amp has now been finalized.  

 

 

1000

 

The op-amp is OPA140, for those who have asked.  This provided the best mix of low noise, low distortion, near rail-to-rail voltage swing, and low current draw to keep battery life high.  The discrete output buffer uses 12 hand-matched, thru-hole components per amplifier.  The gain switch is now 3-way, with settings of about 0dB, 10dB, and 20dB.  The idle current draw of the amp is about 14mA, so battery life will depend on the mAH of the 9V batteries.  About 21.5 hours with 300mah NIMH and 36 hours with 500mah Li-Polymer.  Total PSU capacitance was also increased from 1320uF in Protoype #1 to 2720uF in Prototype #2 to 4000uF in the final version.  Thanks to new parts that keep getting smaller.

 

At this point, I'm just waiting for the enclosures to be machined and the special order parts to come in (the last of those expected end of September).


Edited by justin w. - 7/21/12 at 3:54pm

HeadAmp Audio Electronics - home of the Pico and Gilmore amps.  Now with Audeze, Fostex, HiFiMAN, Sennheiser, and STAX.
Find us at www.HeadAmp.com

Reply
post #110 of 730

biggrin.gif

post #111 of 730

Hi Justin, please add me to the pre-order list also.  Thanks!

post #112 of 730
Thread Starter 

I'll be bringing the prototype of this amp to the DC area meet on Saturday, and also the LA meet August 18

 

Links to both meets:

VA / MD / DC meet on Saturday, July 28, 2012

2012 Headphone Meet @ LAX Hilton - Saturday, August 18, 2012 - OFFICIAL THREAD

HeadAmp Audio Electronics - home of the Pico and Gilmore amps.  Now with Audeze, Fostex, HiFiMAN, Sennheiser, and STAX.
Find us at www.HeadAmp.com

Reply
post #113 of 730
Quote:
Originally Posted by justin w. View Post

I'll be bringing the prototype of this amp to the DC area meet on Saturday, and also the LA meet August 18

 

Links to both meets:

VA / MD / DC meet on Saturday, July 28, 2012

2012 Headphone Meet @ LAX Hilton - Saturday, August 18, 2012 - OFFICIAL THREAD

 

Justin... if you have any finished by September... I'd be happy to take one to the Head-Fi meet at Cambridge, England 

 

http://www.head-fi.org/t/601003/uk-2012-head-fi-meet-september-15th-cambridgeshire

post #114 of 730
Thread Starter 
Quote:
Originally Posted by OK-Guy View Post

 

Justin... if you have any finished by September... I'd be happy to take one to the Head-Fi meet at Cambridge, England 

 

http://www.head-fi.org/t/601003/uk-2012-head-fi-meet-september-15th-cambridgeshire

 

sorry but probably not.  mid September is when I am expecting the enclosures to be finished machining, and then the enclosures still need to be polished/anodized after that.

HeadAmp Audio Electronics - home of the Pico and Gilmore amps.  Now with Audeze, Fostex, HiFiMAN, Sennheiser, and STAX.
Find us at www.HeadAmp.com

Reply
post #115 of 730

cheers for that Justin, appreciated.

post #116 of 730
Thread Starter 

Sample leather case (which will be included) for the amp will be here Wednesday.  Hope it's good so I can post pics.

HeadAmp Audio Electronics - home of the Pico and Gilmore amps.  Now with Audeze, Fostex, HiFiMAN, Sennheiser, and STAX.
Find us at www.HeadAmp.com

Reply
post #117 of 730

Hope to see the leather case soon~

 

BTW, I read the technical spec of Pico Power, but since I am not familar with the electronic engineering stuff, I just wondering how the latest prototype sounds like.

post #118 of 730
Thread Starter 

Just got the leather case today

 

 

1000

 

1000

HeadAmp Audio Electronics - home of the Pico and Gilmore amps.  Now with Audeze, Fostex, HiFiMAN, Sennheiser, and STAX.
Find us at www.HeadAmp.com

Reply
post #119 of 730

Very nice looking.  Not nearly as bulky as I would have expected. 

post #120 of 730

that will look well nice next to my WM-Z case... very stylish Justin, good choice indeedy.

New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Sponsor Announcements and Deals
Head-Fi.org › Forums › Sponsor Announcements and Deals › HeadAmp Pico Power: Pre-Order Thread