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The Cayin C5 portable power house.
Mar 24, 2015 at 11:17 AM Post #1,399 of 2,420
lohb said:
 
Where did you get them ..$$$ ? Always happy to see someone pushing stock config beyond its limits...does the chip need any kind of conversion socket ?
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I purchased them at Mouser, with tax and shipping, it came out to about $30.  There is no conversion socket needed, however if you decide to change them out, you need some surface mount soldering equipment and some experience.  Since it is a SOIC chip, it is very small and also surrounded by many other components.  You will need a hot air soldering station, some very fine pair of tweezers, and some liquid flux, and very steady hands.  It is easy to change out by someone who has some surface mount experience.
 
I have used  many op amps over the last decade and I find the ADA4637-1BRZ to be one of the best.  It really took the C5 to another level.  It now sounds better than my Oppo HA-2's amp. 
 
Mar 24, 2015 at 1:00 PM Post #1,401 of 2,420
lohb said:
 
I'm SOLD.
 
I'll be letting a local pro do it that has amp modding equipment though.
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You will need 2 of them, one for each channel. It sounds incredible with the AKG K7XX headphones.  I am using a Cowon P1 as the source.  With Machbass turned on and bass boost on the C5, the K7XXhas crystal clear full range sound that will make a bass head jealous - lots of deep bass but no distortion.  Keep the TI OPA amps in case you want to change them back or use in some other device. 
 
Mar 25, 2015 at 12:39 AM Post #1,403 of 2,420
My C5 came in no time at all and I was definitely impressed by its looks. It felt sturdy in hand and I had no problems with the headphone jack. Unfortunately, my F11 has yet to arrive and the wait is killing me!!
 
Mar 25, 2015 at 5:27 AM Post #1,405 of 2,420
Have added a Sennheiser HD650 to my arsenal of headphones and I am speechless how well the C5 drives it. I listened to it until it switched off...amazing. Can only recommend this combination....
 
Cheers,
K
 
Mar 25, 2015 at 10:21 AM Post #1,406 of 2,420
koolpep said:
  Have added a Sennheiser HD650 to my arsenal of headphones and I am speechless how well the C5 drives it. I listened to it until it switched off...amazing. Can only recommend this combination....
 
Cheers,
K
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Congrats on your HD650!  Consider upgrading the cable - I changed mine to an Oyaide HPC-35HDX  cable ($70 on Amazon) and it made a world of difference.  Lose the stock cable, it doesn't do the Hd650 justice.
 
Mar 25, 2015 at 10:28 AM Post #1,407 of 2,420
audioman2013 said:
 
Congrats on your HD650!  Consider upgrading the cable - I changed mine to an Oyaide HPC-35HDX  cable ($70 on Amazon) and it made a world of difference.  Lose the stock cable, it doesn't do the Hd650 justice.
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Thanks for that!
 
I have great experience with the Oyaide for HD25-1 so I will definitively look into that one. I am not sure though if I shouldn't directly go balanced as well. I'll keep you updated.
 
Cheers,
K
 
Mar 25, 2015 at 1:10 PM Post #1,409 of 2,420
lohb said:
  Tried to get the ADA4637-1BRZ from Hong Kong - good part ...$10 a pop = $20 total....bad part $70 for shipping....I'm serious. They wanted $70 shipping for 2 thumbnail sized opamps !!
Waiting on a US ebayer to confirm shipping, so I can get opamp rolling to take this baby up a level.
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That shipping cost is nonsense.  Have you tried to see how much the shipping cost would be from Mouser or Digikey?  I don't know if they ship internationally but it would be a worth to try. 
 
Further update - so I've burned in the ADA4637-1BRZ for about a day now and I just have to say - Cayin should consider these in their next amplifier.  The LME49600 is a very capable output device and is the reason I chose to buy the C5.  The only thing I don't like is the aluminum case is pretty thick in comparison to the internals.  I think they could have easily shrunk down the size and have the same performance by using a thinner housing.
 
Mar 25, 2015 at 10:38 PM Post #1,410 of 2,420
This thing sounds.. Amazing!!! I feel like Harry Potter lost in the maze except the maze is made up of sound. So immersive and magical, I completely agree with what everyone has been saying about this amp.. the detail, the soundstage, the impact from the bass boost.. all incredible. Through plenty of research I think it's safe to say that I couldn't have made a better choice for a first amp 
etysmile.gif
 
 
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