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Yaqin SD-CD3 Tube Signal
Upgrade CD/VCD/DVD Buffer Processor Amp is an extremely
convenient way to improve the timbre of player. Yaqin CD - 3 tube buffer is based on the 6N8P / 6SN7
tube. and is guaranteed to add the magic of tubes and a good
harmonic structure tube that is easy to the ears.
The short fall
The bass definition is muffed and does not precisely portray the
position of every music instruments. Most of the music comes
out as a whole without any holographic effect. It may
sound warmth in the vocal, but the throaty vocal of the singer
is not engaging at all.
On Demo - the amp is hook up between the 300B integrated
amp and the CD pro2 player through the 12inch full range speaker. Immediate the
weakness shows up without much listening. Somehow, there
seems to be lack of power & control in the music. In scale of 5
as the highest grade, it score 2.5.
Next comes the modification, replacing all the capacitors to Mundorf and
all the signal input /output wires using the 7N UPOCC silver
solid core. I would say that the
improvement is at least 40% better, retraining the 6SN7 warm
signature portraying better imaging.
the micro inner details are so much better in a darker
background. String energy is energize with better control.
Overall the customer is satisfied.
On further improvement, the CV181 treasure tube or RCA 6SN7 is
the choice of tube to explore.
The next
change.................... ,
A week later after changing the Mundorf caps,
Tube Roll to CV181Z treasure
Now they you replace the
stock tube to CV181Z treasure, bring you to the next level of
enjoyment.
your comment after few hours listening- very natural smooth
and wide sound staging. Highly addictive though bass a bit loose. For sure, it take
50hrs to run in the cheery pick treasure tubes
The Top Grade Silver Gold Oil Capacitors Change ? Why do that
since you have been enjoying the Upgraded amp
using the silver oil Capacitors. Well one of his friend
, I die hard fan of Mundorf product, looking for the
silver oil. Since
he wanted to maximise the performamce of the amp, I give it a
try for SGO.
Confidently , I told him, it's a wise choice of caps that goes
into this amp
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Audiospace 845
Mono Block Power Amplifier |
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The amplifier SET845
sound powerful to match up the ATC speaker. The compliant come
when one of it's channel down with a blown Jensen oil
capacitors. (Oil leak). He was unhappy with the sonic
characteristics being that the highs is not refine and
overwhelm the mid and the bass. , even though he has roll many
driver tubes ,the 2 X 6SN7.
We did not capture the
amplifier picture before the mod but then at least took pictures after the mod to share. The change of capacitor are
entirely Mundorf as we find them more natural with a smoother
extension on the top octave. Total 5 caps were used, 4 of which
are Silver Gold and a Supreme capacitors. The largest value is
a 8.2uf supreme. coupling from 300B to the 845 tube. Being
cost conscience, the decision was not to go for the SGO Silver
Gold Oil.
Silver Gold has the lush sound so it complement the 300B
driver. The 300B always has a beauty in the mid and sweet
highs. so to retain a richer bodied character, we go for
silver gold. It take 3 hs to complete the mod cause the layout
of the components make it difficult to access to the soldering
of the capacitors. It's late night
time to go home but just not yet, need to listen and at least
get the feedback of the customer
JOB DONE . Time to fire up the system
CD player (Shanling)
Audio space 300B preamp
Audios space 845
ATC Speaker
WOW ! chance to listen to the 20K setup
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The tonal and frequency
response is not truncated / skew towards the highs. tonally
more balance. Play some Piano piece, more organic sounding
with a better harmonic decay structure.
Overall he enjoy the music, at least playing more CD rather
than always being selective of the CD that has less highs
extension.
The rest of his Home work
Tube rolling - 845B, 845M, 845T ( settle with 845T
PASVANE) and never ends here.
Surprisingly a fine 845 tube, its hard to believe that
the
internal construction is so similar to the old 845A Shuguang.
YET, sound so much better, the new 845T has all
the good advantages of the 845b and 845c.
It's
like
upgrading from a $2000 amp to a $4000
amp... overall sound
improvement from top to bottom.
Just only after 5hs burn
in time)
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Triangle Speaker
Crossover |
The customer wanted a
better resolution & bass control in the triangle speaker.
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Upon taking out the
speaker ,the crossover uses the BP cap for the bass
crossover, 5% tolerance. The tweeter capacitors are
polypropylene under their own Triangle label. The XO comprises
of 2 layer the lower deck is a bass crossover with a Bi-polar
cap. The top deck is for the Tweeter. |
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Mundorf MKP series.
Chosen for it's speed and dynamics, great for the bass.
Original Blue multi-stranded wires change to 7N UPOCC copper
(12AWG) |
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The tweeter XO are
Mnudorf supreme, M cap & silver oil. chosen for it's clarity and
smoothest. The wires are 7N UPOCC 18AWG silver for the
positive, 14AWG copper for the negative. All resistors
upgraded
to Mundorf 10watts. |
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The final operation of
the XO, It's a ugly random stacking block,. doesn't looks
nice at all. But the sound improvement justify for the effort
and money worth.
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Purchase of above USD$100 , we offer shipping
discount
Ask for quote. : robertlai@liveacoustics.com.sg
Payment Method ; Paypal Account sales@ahfartaudio.com |
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