get well soon and speedy recovery, my friend

Hi, I will help to look at hiend audio market around socal and audiogon

just try opa1662 (if you want something smooth on mids) or lm4562ma (nice on tops freq & thigh bass) but changing soic opamp is tricky

Quote: the CRD, i ordered it today, do you mean like The Wire Headphone Amp? I have The Wire SE-SE withh setup Denon CDplayer - JOB DAC (by Goldmund) - The Wire Headphone Amp - Sennheiser HD650, sounds very pleasant but i want to listen Tube Hybrid amp using 12au7 (i love the Mullard...

I wiil try this schematic,  it's more simple than the original schematic, Any comment or advice are welcome

if you want to use buffer as output stage, you can get 250mA @output thru your headphone but you cant do buffer roller( unchange able), if you use opamp ic, you just get smaller output but you can do opamp ic roller(just put socket) so you can listen to different opamp chip :rolleyes:

is it like this?

Quote: Thank you for the link....it's very interesting Quote: and how?   Quote:   i saw from this schematic, they put 330nF between tube and diamond-buffer, is it gonna strip-off the DC? is it necessary to use fet LND150? i will probably try this schematic.  I'm ...

Hi,   I found this schematic Tube headphone  Amplifier using 1 pc  12AU7  but  can i replace the mosfet IRF510 with BUF634 or diamond-buffer? any comment or  suggestion are welcome Tommy

i tried with LM4562Na, sounds perfect on high and details, tight-bass

hi Nigel, i ordered some of those LME49880, still wait on the mail, i'm hoping they will come asap

Hi Nigel, how's the sound with ADA4637-1 & ADA4627-1?compare with LME49990?

Quote: Perfect...i tried opa602bp n buf634 as headphones amp on protoboard lastnight..love it!!! where did you buy opa602cm?/is it obsolute chips,right?any extra? i dont try ada4610-1brz  that's much

  Quote:   depend on your taste n you need to roll it yourself, these are the choice: - LME49990 is neutral n nice - LT1122 is more microdetails n crips - OPA1662 is so sweet on mids n vocals, nice tight bass  

  Quote:   Yes, but did you compare the price difference?(its "under $10-20" and "$160" /pair), For my opinion n taste, if i can do opamp ic rolling for under $20/pair, i'll do it for my $200 cd player but for $160/ pair burson opamp, hell no Otherwise, i still using my Goldmund...

  Quote:   I'm still using them on my cd player.Also, i used OPA1662 and BUF634 as on The Wire Headphones Amp set-up, the sound is so good

hi Ecohifi I  got from TI too, give it try to order again

"To be honest, all Pro audio cables are made of either OFC or OFEC (99.9 and 99.99) so I doubt using a purity higher the ones used to produce music is pointless"   then you need learn more about these 2 metal conductor. As you can see on the interconnect and speaker cables market, the...

Quote: Report back after compare between OPA1662, LT1122 and LME49990, for my taste, i still like LME49990's natural sound than LT1122 or OPA1662 BUT these 3 opamp are nice opamp chip so far, they just have a little bit different each other, OPA1662 have a bit sweet on mids(as BurBrown...

OPA1662 sat in my cdplayer start this morning n under testing for hours, i thought they need to pass "100hours broke-in step" 

Quote: i just want to see schematic before buy the crack fullkit Quote: i gonna see the  VanWarde OTL schematic  

Do Anyone have schematic for The Crack OTL Headphone Amplifier? i wanna to build one (due i have a good collection of small tubey) thank you Tommy

Just give advice, give a little solder flux first @the connector joint tap then you will melt them with 60-40 rosin core solder, strip the wire (around 1-2mm) and give the copper wire with the flux( just a little dip), and also don't forget to put the connector cover first before you do any...

try www.partsconnexion.com , they sell some solid silver wire @different AWG

its seem, you need solder the cooper wire with the big tap(is ground tap),the red and blue wire connect with the other 2 small tap (the L annd R channel), gud luck