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For Sale or Trade: FS/FT:(FINAL $ DROP!)Fully-loaded KHA Amp(Audio-gd PSU&Discrete opamps, premium caps,alps...

post #1 of 9
Thread Starter 
This Classified is Closed

For Sale or Trade:
FS/FT:(FINAL $ DROP!)Fully-loaded KHA Amp(Audio-gd PSU&Discrete opamps, premium caps,alps pot)(Syd Aus|W-wide)or FT - nice USB portable dac.

Will Trade For: Nice USB portable dac
Will Ship To: Anywhere

FS: Fully-loaded Jaycar amp




Bought from http://www.head-fi.org/forum/thread/520926/fully-loaded-diy-kha-jaycar-hp-amp-uk in Nov last year. Now I no longer have a use for it, since I got a Audio-gd NFB-10WM.

Quote:
This really is a superb amplifier, which comes highly recommended by numerous highly thought of members here, such as Sennsay, Pricklely Peete, Johnwmclean, Fault151 among others. There is also lots of information over at the RockGrotto forums about these DIY kit amps.


More info on rockgrotto, there's a 91 page thread there and an entire section for the jaycar kit amps.

The amp has:




a) Audio-gd regulated PSU section




b) Audio-gd Discrete opamps, &/or LME49720 (depending whether you want it all discrete, or want to change the sound sig)




c) Premium caps (Nichicon Muse KZ, FG and Soniqs PXX polypropylene output caps. A full set of Russian PIO bypass caps at the bottom of the board.)




d) Alps 'Blue Velvet' RK27 pot




e) Neutrik locking jack and RCA sockets




f) WBA silver solder




g) HIFI 2000 "Galaxy Magiorato" 230 x 280mm case, with brushed aluminium front and top panels. (slight nicks on the back/front and top)




h) 220-240V fused socket with a switch at the back (on the power socket) and front.




No PSU noise or channel imbalance, very low noise floor. Neutral-dark sound, best suited to bright HP (although the Moon vs Sun opa will change the sound signature). The gain has been set for low impedance HP, you can swap 2 resistors to change it (gain is controlled by swapping R1 and R4 for lower or higher value resistors-currently set for 1.5k ohms).




I used it to drive my T5p, CD3000 and W5000 and it was great.

How much:


I traded the amp for about $500-600 headphones, so I'll part with it for:




$450,415,400,375,350 $320 (free pickup from Sydney castle hill) + shipping (25 within Australia, 60-75 for international). Add 2% paypal fees if using paypal.




You can also make an offer on it + the items listed below

or FT - nice USB portable dac. Need one for work


Edited by svyr - 6/22/11 at 6:26pm
View All More from This Seller
post #2 of 9
Thread Starter 
buy with confidence:
-feedback: http://www.head-fi.org/classifieds/feedback/index/user_id/125162
-old style feedback: http://www.head-fi.org/forums/f12/svyr-468134/


Or you can make an offer for the amp + one of my other classifieds:
http://www.head-fi.org/forum/thread/563238/fs-earsonics-sm3v2-sydney-australia-or-worldwide-price-drop
http://www.head-fi.org/forum/thread/543016/fs-prometheus-nos-usb-dac-price-drop-w-xlr-outs-and-a-transformer-upgrade-or-ft-nice-usb-portable-dac
http://www.head-fi.org/forum/thread/558666/akg-k340-final-drop-electrostatic-dynamic-hybrid-bass-med-or-heavy-with-extra-jmoney-pads-and-headband-aus-syd-or-worldwide
http://www.head-fi.org/forum/thread/563558/pioneer-monitor-10r
Edited by svyr - 7/23/11 at 1:09pm
post #3 of 9
Thread Starter 
price drop btw
post #4 of 9
Quote:
Originally Posted by svyr View Post

price drop btw


There is a mod well worth pursuing via the Rock Grotto page where you upgrade the 4 power transistors (that have the heat sinks) to better grade components (for around 12 USD roughly speaking).If you hang onto the amp you should look into swapping these out. It's an easy job.

 


Peete.

post #5 of 9
Thread Starter 
Quote:
Originally Posted by Pricklely Peete View Post





There is a mod well worth pursuing via the Rock Grotto page where you upgrade the 4 power transistors (that have the heat sinks) to better grade components (for around 12 USD roughly speaking).If you hang onto the amp you should look into swapping these out. It's an easy job.

 


Peete.


Cheers. might still keep it. Goes very well with my K271, that matches best with neutral amps.

Um, could you possibly link to the page they discuss the transistor replacement? (maybe post the compatible part numbers... Might look into upgrading them myself, but need to buy a new soldering iron...Left mine at the old place, after I finished playing with my SRM-1/mk2.). Do the heatsinks need to be swapped as well, or is the power dissipation about the same from the other transistors?
post #6 of 9
Thread Starter 
ops, nevermind, looks like Ceri has already answered that before I traded him my CD3000 for the amp:

http://www.head-fi.org/forum/thread/520926/fully-loaded-diy-kha-jaycar-hp-amp-uk#post_7102870
Quote:
and also answering one of your other questions I swapped out the original transistors for matched and uprated ones (I can't recall which ones, but I can get the info for you if it makes any difference). The thread you linked to regarding mods is an old one - look for threads with the members I mentioned in the original post. All those guys highly recommend these amps, and many have done similar mods to me - Sennsay and Pricklely Peete in particular.

So I'm already running 'better'/matched transistors smily_headphones1.gif
post #7 of 9

Hi, I'm interested and did send you a PM. Did you get it ?

post #8 of 9
Thread Starter 
wink.gif I'll reply soon, it's the weekend mate, don't get a chance to reply to head-fi related things sometimes... Mobile head-fi doesn't really work well, especially the PMs.
Edited by svyr - 7/23/11 at 11:31am
post #9 of 9
Thread Starter 
sold smily_headphones1.gif
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