*stainless steel knobs are optional and at additional cost.
The BC3000 MKII takes the BC3 Galatea MKII design to the next level of musicality
and represents the state of the art in single ended Blue Circle preamplifiers.
When it comes to making improvements in quality components, there is a law of diminishing
returns. What we mean is that moving from one quality level to a higher level becomes
more and more difficult as the quality increases. Like the venerable BC3000, producing
the BC3000 MKII requires considerable effort. After all, the fundamentals of circuit
design have not been completely changed by us or anyone else. In order to produce
an electronic component that stands at the pinnacle of sound reproduction, it is
the little things, the attention to the most minute detail, that allows one to move
from an already high level of excellence to the next. The devil really is in the
details. The result is a component that is significantly superior to any other single
ended preamplifier we have built to date.
Every individual component, every connection, every subsystem and every completed
preamplifier is tested, evaluated and tested again. Each unit is lovingly hand-assembled
and listened to by a small group of highly trained specialists
The Power Supply is the same BCG3.1 MKII high current dual-transformer design used
for the BC3 Galatea MKII. Filtering is both massive and very very fast. The rectification
circuitry employs HEXFRED diodes.
Airborne Wiring is employed throughout. This is a technique where all signal path
and power supply wiring is kept suspended. This results in lower signal loss, better
transient response and improved linearity.
Through a rethinking of tube bias and current source circuitry, we have managed to
squeeze more linearity out of the tube response. Single-ended Class A dual triode
design with very high gain remains our basic design philosophy.
*The BC3000 MKII employs true film and foil capacitors at the output (from a transparency
point of view Blue Circle film & foil caps are about as close to a piece of wire
as you can get)wheras the BC3 MKII uses metalized polypropylene capacitors.
*The onboard power supply of the BC3000 MKII is 54% greater than the BC3 MKII.
Measurements BC3000 MKII:
Residual noise reference to full rated output: >-110dB or <65uV non weighted
Residual noise reference to full rated output: >-120dB or <22uV within audio band
Hum below 400Hz: >-143dB or <1.5uV
Tracking error tube stage: < +/-0.1dB
Tracking error volume control: <+/-0.038dB
Channel separation: >107.5dB
Frequency response at 15V output: 10Hz to 40K +0.00db, -0.1dB; -1db at 70kHz; -3db
Distortion at 1V output: <0.05 %
Voltage gain: 23.5 dB
Maximum output: 25 Vrms
volume control range: -95dB to 0db in 62 steps standard in Shallco attenuators
input impedance: 100Kohms
output impedance: 180ohms
*5 Line level inputs, 1 loop input (3 line level inputs for balanced version)
*Optional USB input available
*2 Pre-amp outputs, 1 loop output
*Tube complement: 2-6922
*Power requirement: 120Vac 50/60Hz 38Watts - available in 100, 220, 240 Vac
-Main chassis: 17.5" (width) x 3.25" (height) x 14.6" (depth)
-BCG3.1: 6" (width) x 5.375" (height) x 14.6" (depth)