The LL2.1 is a
direct replacement for the LL2 preamplifier. The LL2.1 features
the following upgrades and modifications as compared to the LL2:
-
addition of
a built-in remote on/off
for LAMM amplifiers
-
introduction
of the attenuation for gain reduction by 15 dB
-
some
new parts
-
new
knobs
-
slight
changes in schematic diagram
Model
LL2.1 is the next generation of the original LL2 which was the first in the line of LAMM vacuum tube
preamplifiers. Unique topology and application of
the most advanced technological resources and
processes bring the LL2.1 very close to the
threshold of excellence in sound reproduction. A
main distinction of the LL2.1 from any other
comparable type of preamplifiers is its almost
inaudible sonic signature. When connected to an
appropriate type of power amplifiers, especially
LAMM amplifiers, it assures the recreation of a
three-dimensional soundstage without boundaries
and limitations.
The
LL2.1 features a topology that brings out the most
natural sound performance in the audio path, as
well as graceful and sophisticated design. It
employs a pure class A operation from input to
output; all stages are single-ended. The
preamplifier's audibly neutral power supply
features a full-wave vacuum rectifier.
This rectifier, together with a choke-containing
filter, allows to practically get rid of the hum
and buzz and, in the end, to ensure the verity of
dynamic range without coloration. Other features
include 3 inputs; 1 tape loop; 2 sets of outputs;
front panel muting switch; attenuator for gain reduction by 15
dB; built-in remote on/off for LAMM power amplifiers; protection
circuitry coupled with automatic mute at turn
on/off.
Each
preamplifier is carefully hand-crafted with
matched components of the highest quality, some
of which include military graded low noise DALE
metal film resistors; NOBLE potentiometers;
ELECTROCUBE and ROEDERSTEIN film capacitors; high
frequency switching grade CORNELL DUBILIER
electrolytic capacitors; and specially selected
long life vacuum tubes. The LL2.1 features a
custom-designed power transformer.
The
LL2.1 is available in two versions: standard and deluxe,
both of 
which utilize identical
chassis, PC-board and parts.
In deluxe version, the power supply energy
storage is approximately twice that of the
standard version (four identical light-blue capacitors next the
choke; only two of these are installed in regular version -- see
first detail image insert).
Also, in deluxe version, all film
capacitors in critical paths are paralleled by
polystyrene capacitors of the highest available quality (yellow
capacitors on two images -- right and below).
The
LL2.1 works on all world AC line voltages.
ML3 Signature
