new development of SILK P-4200 balanced output transformer, the performance
of true balance circuit in New GlowMaster KT-88 can not be fully realised.
Other balanced push-pull amplifier can get very distorted waveform at
high frequency once drive an unbalance capacitive load. (most loudspeaker
has passive crossover network comprised of R/C/L) Even drive a load
with very small capacitive value of few pico farad, regular balance
output transformer from other companies will display abnormal behavior
(this happens to be the case when just connecting an oscilloscope which
has only 3pF shunt capacitor at input terminal to see the signal trace).
SILK P-4200 Balance output transformer uses our own special balance
winding technique to counter this effect so it can handle unbalance
capacitive load without any problem and extend the quality of balance
circuitry to the extreme.
New power supply transformer (SILK Special layered wound) with +700VA
is the main power source to supply all current needed to drive GlowMaster
KT-88 a champion of its class. There is special electro-static shield
built in the main transformer so this amplifier can be used in environment
where high voltage noise would normally cause system instability. Further
the main transformer is also feature electro-magnetic shield to suppress
any magnetic flux leakage to other sensitive input circuit. Main power
supply is separated into high voltage for output tubes and low voltage
for input and driving tubes. High voltage power supply has big DC choke
with low output impedance to smoothing out the supply ripple and provide
very stable voltage. Low voltage is a dedicated regulated supply that
has more than 105dB of ripple rejection. Bias adjustment voltage is
also regulated to maintain the most stable voltage.
Input and driving circuit use 3 x 6N1P dual triode per channel. This
6N1P tube has gold plated grid winding that offer the best sounding
characteristic of any input tube. We have selected each input and driving
tube to match with predefine working of our circuit. Output tube is
our own hand selected matched quad KT-88.
We announce that the new GlowMaster KT-88 has output power of 65 watt
RMS per channel, but the true reserve power (peak instantaneous power)
of close to 100 watt/Channel. At clipping (soft clipping) GlowMaster
develops 80Watt RMS.
High output power is not alway guarantee that the amplifier has superb
diving power. The true specifications that indicate true driving force
are output impedance and damping factor. Most KT-88 push-pull amplifier
has more than 2 ohm output impedance and damping factor of less than
5 (if most manufactures really provide truth specification). Even if
such amp has 150 watt per channel, it will sound flabby and slow when
play against new GlowMaster KT-88.
With hundreds of hours of fine tuning, we are able to make the new GlowMaster
KT-88's Output impedance of only 0.7 ohm while damping factor is 10.5
or better. This can only mean that new GlowMaster has breaked the limitation
of regular vacuum tube design for under 100 watt RMS per channel amplifier.
Its low output impedance and high damping factor means that it can fully
control any loudspeaker with precise timing and pace even from low listening
level to the highest level.
Its true wide bandwidth means that it can equally render music signal
and capture all harmonic overtone of each instrument without bandwidth
Its ultra low harmonic distortion combine with true wide bandwidth characteristic
allow new GlowMaster KT-88 user to hear details and inner details at
all listening level.
KT-88 sounding performance enters new era of true high definition vacuum