QUOTE(andrew9292 @ Feb 13 2014, 08:53 PM)
Today is a good day. Completed the first part of the modifications to my M3300sf today......
All capacitors are changed as per the list at the previous page with the exception of 2 big power filter capacitors due to slow shipping.
Opamps are OPA2123P.
No joke, not kidding, bukan main-main...
It sounds really different as that forward-ness and hot high frequencies are quite tamed now although still burning in (if you believe in it).
Other stuff will be as usual, better sound stage & layering. Thicker, centered and 'in your face' vocals.
Much better details, some songs have a slight reverb or background instruments/notes/sounds that can't be heard on the original non-modded speaker.
Wasn't wrong about the OPA2132, it's warm and really wide in a very natural way, it's bass is big & natural-throaty plus it punches the chest.
Though it doesn't sound as 'clean' as i thought it would be, probably cause the power caps are still stock
As always, after modification the basic conclusion is "this is music" with a wide smile
Glad the modifications worked out fine...
QUOTE(andrew9292 @ Feb 13 2014, 08:53 PM)
Second round awaiting, the pending UHE caps, & change the internal interconnect cables + do something about the volume control (too loud & channel imbalance at start of turn). Maybe have send out for resistor modding cuz im color blind
Some pictures. No pictures of the process, was too concentrated and forgot to take some... sorry, phone cam.
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All the stuffs arrived
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It's Done! Front view
Those original big main filter/smoothing capacitors ("Unite" brand) are crap anyway and bound to fail sometime later (which mine did). Once the HE series capacitors are installed, you will notice the amplifier's own noise level especially humming, crackling and hissing will go down significantly.
QUOTE(andrew9292 @ Feb 13 2014, 08:53 PM)
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[attachmentid=3851411]
Back view
(I accidentally partially lifted some trace and had to reroute some of the solder joints to the nearest common joint. The metal pin connecting in the middle and the U-shaped pin. This happened when i was using the only solder iron+sucker, had to press hard on the board.)
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Was fool not using this for my previous mods. It made things so easy, if I didn't try to be a hero and actually used this all the way today, those traces wont be lifted. Haih
I think that's because you've put the iron in that spot for too long, which can cause the trace to detach (as the heat from the iron melts the glue holding the copper trace to the board). Rarely use that solder wick, except for surface mount jobs...
This post has been edited by lex: Feb 13 2014, 09:41 PM