Fresh & Calm, Saturate &
Exuberant
Comment on¡°Music Space Time¡± MUSIC£88WE Amplifier
Music Space Time Power Amplifier Manufacturing Co.,
Ltd. does not have a long history, but it has constantly
pursued the development of product capability and quality,
which can be witnessed by its machine launch one after
another. The company has a group of professional ¡°fans¡±,
who are crazy about audio technology and engaged in
the development. They have conducted a large number
of experimentations and tests for each amplifier and
scientifically choose the best working status. For each
type of machine, they consult with many other parties
and make revision repeatedly before producing the final
version. They also pay much attention to component selection,
process quality, product completion, sound quality as
well as price, all of which are embodied in their products.
That spirit is rare indeed.
MUSIC-88WE amplifier has adopted pentode EF80 as the
front stage and part of small resistance cathode resistance
circuit voltage negative response as well as relatively
small anode resistance so that higher gain and better
frequency response will be achieved. Double triode with
medium amplification coefficient 12AU7 acts as phase
reversal and transformed long-tail pair circuit is coupled
with front stage directly, resulting in simplification
of circuit structure, enhancement of transient characteristics,
relatively large anode current and high power supply
voltage, as well as sufficient excitation voltage provided
for output stage. The output stage applies low distortion
and high efficiency power beam tube KT88, which ensures
stable operation due to its standard push-pull way,
fixed bias voltage and grid circuit feedback parameter.
The machine applies large loop voltage negative feedback
inclusive of output transformer, which can enhance the
capability and damping parameter of the machine. |
High-quality output transformer is the basis of this
machine and it ensures quite small phase distortion
and wide frequency response. The supply is no special
but selected filter circuit parameter has not only sufficient
power supply but also fast response speed.
This machine adopts full-printing circuit plate assembly
craft with sufficient reliability and high completion.
The components are not compromised and even smallest
component such as input plug and wiring terminal of
loud-speaker are high-quality products. The bottom plate
is made by 10mm aluminum-magnesium alloy frame and 4mm
aluminum-magnesium alloy plate. The structure is firm
and steady and looks elegant.
If the design is improper, the application of KT88
power beam tube as the amplifier of output stage will
cause coarse sound, which often happens. As a whole,
this MUSIC-88WE amplifier, by way of equipping with
¡°Castle¡± speaker and ¡°Triangle¡± Volante speaker for
long and repeated listening to all kinds of music, creates
a feeling of fresh, calm, saturate and exuberant due
to its good full-frequency balance and proper analysis
capability. It has plentiful levels of details, good
space sense, vibrant and expansive, dynamic and fierce,
and full of music flavor. The bass is elastic and well
controlled, the mid is soft, smooth, saturate and transparent
and the tremble is mild, bright and natural. It can
represent people voice, string, piano and symphony as
well as quality of instruments and emotion in the music
quite well and also can handle both classic and popular
music, suitable for people listening to all kinds of
music. Therefore, it occupies a leading position among
domestic electronic tube amplifier and is over value
in respect of its music representation. Try to listen
carefully and you will fall in love with it.
This machine has relatively large capability of speaker
matching but is sensitive to power phase. Try to insert
the plug into the socket both obversely and reversely
and find the right way. KT88 can be replaced with 6550
power tube, the former having fierce timbre and the
latter having softer timbre.
Output Power£º70W¡Á2
Frequency Response£º13¡«100000Hz ¡À1dB
THD£º£¼1£¥(13W£¬20¡«20000Hz)
Input Sensitivity£º350MV(100k¦¸)
Signal to Clutter Ratio£º£¾85dB
Output Resistance£º4¡¢8¦¸
Size£º430¡Á220¡Á360mm
Weight£º25Kg
extracted from¡¶Hi-Fi Audio¡·2005. 1 Author£º Tang Daoji
|