6P3P / 6L6 Single Ended Tube Amplifier U$349
Amplifier details:
This amplifier has ZERO feedback and therefore the
sound is open, relax and mellow. 6L6 has been used widely in vintage
amplifiers. It is not the linear-est tube but definitely one of the good
sounding ones.
The output transformer was specially designed to
have very high primary inductance (20H @ 100Hz) and therefore the low frequency
response is excellent. This amplifier is more flexible due to the decent output
power and can be matched to quite a number of loudspeakers. The dynamics is as
good as a class A 1969 or TDA7294 and even the LM1875 solid state amplifiers.
The input/output sockets are high quality gold plated
pure copper version, unlike those very thin chemically plated version which
will wear off in a very short duration. The volume knob is 36mm, with a 6A 250V
high quality durable ship type on-off switch.
This is a true full tube
amplifier and therefore it has output transformers. The quality of the output
transformers is most important to the sound quality and we spare no changes on
that. The output transformer is one of the reasons for the tube sound – proper matching
of impedance.
What you will be
purchasing:
150W power transformers –
cool and quiet running. High quality output transformers made of Z11 made in
Japan SiFe EI core. The power transformers and output transformers are arranged
in such that the interference are minimized. With Z11, the output transformer
has higher primary inductance and therefore the low frequency response will be
excellent. Z11 is much better than the H14 or H18 SiFe cores. These
transformers make most of the cost of this 6P3P / 6L6 single ended tube
amplifier.
The internal pictures are
shown clearer to show you the quality of the parts and the care we took to make
this amplifier.
This 6P3P / 6L6 tube
amplifier is purely hand made. The chassis is made of solid Ash wood, being
properly dried and painted + polished multiple times. The wood grain is rich
and the design is simple yet elegant. The top plate is 2mm ALU, bottom plate is
1mm ALU.
This tube amplifier
employs CLC filter with a huge 5H 200mA choke to further lessen the power
supply ripple and provides a better and cleaner / darker background.
*** This is an economical
hand-made solid wood chassis. There shall be imperfections, such as wood
fillings or wood grain cosmetic imperfections. Purist and perfectionist – please
do not buy! ***
Size: 25cm W x 30cm D x
19cm H.
Weight: 8KG.
Output power: 6W x2 (tube
amplifier overloads gently – even harmonics, and therefore it sounded more
powerful that it should be).
Note:
I. When ordering, please
specify if 4 Ohm or 8 Ohm output tap is needed. Default is 8 Ohm.
II. This amplifier runs
full class A, with low distortion, sweet and mellow sound, and is suitable to
drive high efficiency speakers, or bookshelf speakers. Full range single driver
will be ideal and perfect match for this tube amplifier.
III. It is a MUST to connect
to a load (speakers) when the amplifier is switched on to prevent damage to the
tube and amplifier.
IV. The wood grain will
be different with every unit of amplifier produced.
V. Reinforced packaging
are applied for this amplifier. Tubes are in a separate box/compartment and
users will install tubes themselves.
Additional
features:
We have changed the tube
rectifier from 5Z4P to 5Z3P, to provide more current to the amplifier circuit,
better for dynamics, headroom and bass response. User will not hear any hum at
the listening position. There is just very slight hum can be heard if ears are sticking
next to the driver.
Components: J grade
Beijing 6N1-J and Shuguang 6P3P-J tube. Shuguang 5Z3P tube rectifier. PSU
capacitors – Nippon Chemicon or Nichicon electrolytics, with high power
metalized oxide resistors and 5H 200mA choke with form a CLC power supply
filter to suppress the rectification ripple/noise.
Coupling: Rifa film
capacitors, paralleled with oil capacitors for warm and refined sound. Bypass
capacitors are with high quality made in Taiwan electrolytics. Volume control
is with Taiwan Alpha B100K stereo attenuator.
Output transformers:
3.5K: 0-4-8 Ohm, made with high grade Z11 SiFe steel with special winding
method for better sound.
