I opened a post last year, discussing the modifications on CDT-17A.

The followings are my upgrades on 17A (Hit-audio version):

- replace 2pc 604 with 627AM
- replace EH6922 to EH6922 gold pin
- IEC socket to Furutech 鍍銠鉑金
- upgrade power filter cap to Wima black box
- upgrade powercord connecting IEC socket to power filter with Northwire 18A

Improvement:

- Better resolution and details
- Lower noise level and dark background
- Punchy and more controlled bass
- Extended, airy yet refined high
- Midrange has more body
- Sound a bit noble and high-end

17A (Hit-audio version ) & the new version , what are the differences between them ???

Hit version uses Multicap PPMFX instead of Wima MKP in RCA output capacitator, also better resistor is used too.

Thank you, Sir !!


1.so how could we distingush the Hit Version & AV gala Version ???

2. Why AV gala Version used cheaper materials than the old one (Hit Version ) ? lower the cost ? or ...?

3. Mine was abosultely AV gala Version.I bought it about $ 6200 ( a poewr cable 6N as a gift )

4. what was the old version cost ??

thx ~

???

China products have a strange way of doing bussiness, the first batch won fame and many gave good or best credits and tell others to go for it and buy, then from the same manufacturer their on coming batches of the same model of gear will change to use some or some more cheap parts or even change to use another all cheap design but still using more or less the same name and the more or less same price, if you are happened to buy their next batches of that model, their performences may be very very different form the first batch and you have "catch a banana".

T72BM,
I hope your point of view did not true.
If my Cayin 17A really like what you said,
I never buy China HiFi again in my life.

However, How could I prove your words true or not ????

Sorry, my post has misleading you to think I am saying about this particular model, in fact, I myself like this 17A very much though I don't own one.
Why, I put forward such an idea? any prove? Well, I am not going to state which brand which one has such bad situation, but I can tell you that that idea is share by those who in the real world taking Big6 stuff to sell here in HK, and did really told me this conclusion.
But if you are not satisfy with this, I can tell you in one case, a small brand(not famous) Big6 made tuble amp is not bad at the first batch then when people get used to this and keep on being the customers, the next batches are using fake stuff or even in one case the parts are not safe and could not function well....of course, if you not going to buy this, please feel free and just take me as what you consider.
But I can tell you one more thing, I too work in some case for Big 6 company and they really do business in this way.
Cheers

Let me clarify,

Cayin only produces 1 version and the parts used is identical except for CD transport changed from Philips to Sony.

Hit audio was formerly agent of Cayin in HK and it upgraded caps and resistors as Hit Audio Version and that's the same for CD-15A where we have CD-22 (HK version) or MT-88 for A-88T tube amplifier.

No worry for quality of Cayin's products, it's so far the largest HIFI manufacturer in PRC. CDT-17A is a good CDP for the price, the simplest way of improvement is to upgrade the tube and opamp.

I got this cd player few weeks ago from av gxlx.
cclkelvin, how do i know if my cd-17a is using
Philips or Sony CD transport ?
Til now, still feel that the voice is not warm
enough....

＞＞how do i know if my cd-17a is using
Philips or Sony CD transport ?

聽人講, 搵 Philips or Sony 既 CD 遙控襟下, 控制倒就係.

newer batch should be using Sony.

I think vocal not warm enough should be more related to the tube as EH6922 (non-gold pin) is very very clean in midrange. Once you change the tube, you'll realise.

EH6922 gold pin is much warmer, actually EH6922 gold pin rates highly in foreign tube discussion forum, not inferior to many vintage NOS commanding expensive price tag.

thanks cclkelvin!
ha, before i buy the EH6922 gold pin, i've just replaced 2pc 604 with 2604ap (from my existing dac), the vocal get better at once.

Now |住先, 遲d再換tube.

There are 6pcs of 604 in the machine, which 2pcs you are referring to? Thanks!

The 2 opamp in the front. You can try to replace one by one and achieve your most desirable sound. For me, after repeated trials, I reckon just changing the 2 opamps in front is the best (I try replace all with 627AM or combined with 604/ 101AM, 797 etc).

Another modification which yields the remarkable improvement is on the power filter section, noise floor reduced and overall sound becomes more smooth, rich and pure.

Thanks Kelvin, are both 604 and 627 single Opamps which can be replaced one for one? Any reliable shop to get 627AM?

hi ultramanzero,
i replaced the 2 most near the back of the machine.
enjoy !

604 and 627 is single opamp.

I found that there is 627SM now, should be the king of 627 family. I got my 627AM from Vocative in Kwun Tong and the improvement is remarkable, so I believe it's real.

想請教各位,
17A cdp 有冇built-in volumn control?

＜＞
no built-in volumn control.