| siu sin man tho |
Hi, last week some groups of diyer in thailand test some OPT same time.
I hopee there will be some information for the Diyer to reference.
This is then RESULT:
Well, about the testing yesterday. Let me told you the system first.
Spk. Voice of the theatre A7 by woofer 515B and 802D on 500Hz sectoral horn.
Original network.
CD-transport. CEC TL5100
DAC TDA1541A Non-oversampling
Preamp #26 RC coupling.
2 Power amp in test. One 2A3 drived by 5691 SRPP and VV52 Synergy Style
drived by 417A
We test on 2A3 first.
F-2007 The one that installed on chassis. Neutral, clear bass and good
impact in LF. Detail and HF is fair.
F-7003 connect for 5K. Sweet and pleadingly sing. It made female vocal more
sweet and seem to be younger. Unfortunately, bass is not clear as F-2007 but
good enough.
NY-15-3.5s Same tone of F-7003 with a bit adding of detail at HF. The vocal
is so same as F-7003. We 're so wonder that NY-15.3.5s is closly to F-7003
much more than other series of the same brand.
F-5002 Superb detail. Vocal is so clear but not sweet and pleadingly as both
permalloy. Lack of bass of all above. But we have some trick.
LL1623 Very economic. Less detail and clear of Japanese trans. Bass is same
as F-2007 with the same character, punch and full. We didn't heard this
trans as much 'coz it worse than any Japanese trans.
DIY trans 3k. Less clear of LL1623 but tonal balance is same. Nothing to
talk about. We have to experiment much more.
After first round we have concluson of "the sound of core".
Hi-B give neutral and full bass with impact. Bandwidth is less than others.
Permalloy add something good to vocal. Less full and clear in bass.
Amorphous very detail and clear with less impact of bass. Bandwidth is so
wide.
Second round start with VV52. We focus on F-7003 and F-5002 only.
The result still the same but the owner of F-7003 said "I feel the detail of
F-7003 was hidden somewhere"
So, we moved both OPT to the Spk terminal to used #35 SWG 20cm long of Spk
cable and used 5 meter for HV cable from VV52 to OPT. Believe it or not,
both OPT gain the detail and F-5002 shown more volume and clearer bass than
F-7003, even better than F-2007 I think. I though this is the trick for
anyone who said F-5002 have weak bass.
I'm waiting for the photo from my friend and will sedn to you later.
thnaks
thomas
www.diyaudiocraft.com.
:nod: :idea: :angel: :smash: :dead: |
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| Brian |
Hello Thomas, Thank You for this report. I have been trying to learn about transformers. This is a big help.
Brian |
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| ShiFtY |
| Interesting stuff. If only I could afford some Japanese iron! |
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| siu sin man tho |
hi,
thanks for brian & shifty.
thanks
thomas |
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| siu sin man tho |
hi,
We also had another meeting in hong kong.
thanks
thomas |
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