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HeadAmp Pico Power: Pre-Order Thread - Page 10

post #136 of 730

Justin,


I don't own your products because I'm too poor to afford them, but from an engineer's point of view, I really admire your work.

Pure curiosity, how do you deal with the unbalanced 2x 9V batteries causing dc offset issues when they drop low?

Does the amp cut off the batteries when they are too weak to be used?


Thanks in advance.



 

post #137 of 730

Please add me to the pre-order list.

 

Thanks!

post #138 of 730

Got to hear it yesterday at the meet......wow!  biggrin.gif

post #139 of 730
Quote:
Originally Posted by dallan View Post

Got to hear it yesterday at the meet......wow!  biggrin.gif

 

 

tell us more please

post #140 of 730

Quick a/b against my regular pico, which is no slouch at all.  The Pico power was more dynamic and transparent sounding with great bass impact. At first i thought it was a bit bright and then realized that it was the detail, then i hit the bass part of the song and got the slam.  I was quite pleased.  That was comparing it to my regular pico which is already transparent and detailed compared to my other portable amps as well as any that i have sat down and listened to at meets.  Must say though i don't go previewing many portable amps at meets, just in passing usually.

 

My big test will be comparing it to my Lisa lll transportable amp.  That is almost a home amp status so we will see........It could take it though from what i heard.

post #141 of 730
Quote:
Originally Posted by dallan View Post

Quick a/b against my regular pico, which is no slouch at all.  T

 

can anyone comment on how it compares to the pico slim (yes, i'm well aware of the differences between them and what they'll drive).

post #142 of 730

One is very good the other one is better. wink.gif

post #143 of 730
Quote:
Originally Posted by mrarroyo View Post

One is very good the other one is better. wink.gif


wink.gif

post #144 of 730
Quote:
Originally Posted by Covenant View Post

it's time to jump on the bandwagon again!

 

 

You weren't kidding when you said you're falling for this sport all over again  cool.gif

post #145 of 730
Quote:
Originally Posted by nattonrice View Post

 

You weren't kidding when you said you're falling for this sport all over again  cool.gif


You are unfortunately correct ph34r.gif

post #146 of 730
Quote:

You are fortunately correct ph34r.gif

Corrected..

And, sorry about your wallet......

post #147 of 730

Any update Justin??

Quote:
Originally Posted by justin w. View Post

Update!  This new amp is nearly ready to go.  Just need to finalize the circuit board (what's in the pictures is a prototype, and there are changes), and have the enclosures machined.  The enclosures are machined from 3 blocks of USA aluminum, creating a unique set which will then be sanded/polished as 1 block, creating a seamless appearance.  They will then be laser engraved in-house with great detail.

 

Specs?  All subject to change, as this represents the prototype.

 

Enclosure - Milled from solid USA aluminum, dimensions about 4 x 2.25 x 0.8"

 

Design Type - Single Channel Op-Amp with Discrete Output Buffering (hand-matched components)

 

Power Supply - 2x 9V batteries of any kind, removable battery door on bottom

Reverse Battery Protection - Yes

Power Indicator - 1.8mm Red LED

Max Output Voltage - 14-18V (subject to change)
Max Output Current ~200mA/Ch (subject to change)

3-Way Gain Switch - 1x, 5x, 9x (subject to change)

Volume Control - Alps 9mm rotary, hand selected

 

Battery Life (subject to change)

 

Non-Rechargeable Batteries

Lithium Primary - 100 hrs

9V Alkaline - 50 hrs


Rechargeable Batteries

Lithium-Ion 33 to 41 hrs

High Capacity NIMH - 25 hrs

Med Capacity NIMH - 21 hrs

Low Capacity NIMH - 17 hrs

 

picopower.jpg

post #148 of 730
Thread Starter 

the rest of the transistors came in this week.  the machine shop started making the enclosures.  

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

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post #149 of 730

thanks for the update~!!

post #150 of 730

Hi Justin... can you add me to the pre-order list. Sounds like it is exactly what I am looking for.

 

--mark

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