The Alborada Mk.II mono power amplifier is one of our flagships.
It has been developed total new with a special kind of new
power- supply and a new cabinet, as same as a new output
transformer . With its competitive price and 234-Watts total
output per mono-block, it is the greatest tube amplifier in the
market in it’s class, working with only two power tubes in the
output- stage. What makes the Alborada so special is the use of a
pair of giant type 211 power tubes configured as triodes coupled
with a specially designed output transformer. Benefiting from
an uncommonly direct and short signal path and a simple circuit
executed with premium quality parts, the Alborada's dramatic
performance belies its modest price. Harmonic structure, sound
stage, dynamic contrasts and dramatic impact are all reproduced
with remarkable fidelity to the live event. Never imposing
distractions, the Alborada's invite the listener to enjoy the musical
performance. Consistent with Lua's design philosophy that circuits
should be kept as simple as possible, the Alborada works
its magic with just 5 vacuum tubes. A composite triode input
stage is directly coupled to a cathode-coupled phase inverter,
followed by a pair of EL 34s, operating in an ultra linear configuration,
as drivers for the pair of 211's. Limited negative feedback
is applied to the circuit to reduce distortion and provide a
sufficiently high and especially linear damping factor within
the audible frequency range to control most real-world speaker
systems. For a lot of users the 211 is not the easiest of tubes in
terms of technology and handling. Lua initially selects a quartet of
matched pairs. Then the best pairs will be burned in for a couple
of days and then re-selected to give the pairs with the lowest distortion.
It is therefore hardly surprising that the measured data
for these amplifiers are outstanding. Variations on this simple
circuit especially the new Mk.II version have provided the blueprint
for many superb sounding Lua products in the past. The latest
benefits from recent advances achieved in our flagship range of
products. 200 W/sine/8 ohms with less than ≤ 0.6 % THD+N
at 1kHz is a outstanding result for such a big tube. But what is
interesting more is the fact that this big amplifier is able to reproduce
the smallest signals below 1 W output absolute perfectly
and dynamics as great as from 10 to 100 watts within the shortest
time. At 1Watt output, a bandwidth from 8Hz-100 kHz and
a distortion of less than 0.09 % is realised. The use of only a
single coupling capacitor in power stage endows the Alborada
with a perfectly natural sound without any coloration.