L-200 MK2 Dual Mono Tube Preamplifier
The L-200 MK2 full function line preamplifier is an improved version of our very successful L-200 MK1. Simple and elegant topologies and powering schemes that have been used successfully in the prior version have been methodically gone through by the Triangle Art design team and refined even further. All proven elements of the prior version were retained such as heavy duty chassis design, use of an external power supply and careful and meticulous selection of the finest electronic components and wiring. A new circuit configuration is used and the preamplifiers new printed circuit board, itself a work of art, uses a symmetrical signal flow layout.
The L-200 MK2 offers a total of 5 line level inputs. Inputs 1 through 3 are available as RCA connections and inputs 4 and 5 on female XLR connectors.
The output signal is available on 2 RCA jacks and one male XLR connector for each channel.
The input selector and the passive 64 step switched attenuator are both Elma units wired to connectors and the circuit board using military grade shielded cable.
The power transformer of the L-200 MK2 is housed in a separate chassis and connects to the main unit via and umbilical cord and multi pin connectors on both chassis.
Power indication is by a blue LED built into the power switch on the front panel of the preamplifier chassis.
This preamplifier offers several engineering changes and upgrades, some of which learned of during our development of the landmark P-200 phono stage. The external power supply chassis with the toroid power transformer is mounted remotely from the main chassis via an umbilical cord guarantees interference free operation.
Internally in the main chassis the power supply is separated after primary rectification and is dual mono after this point. Two separate LC power supply filters constructed of the highest quality parts, including proprietary chokes and Mundorf capacitors feed 2 completely separate line amplification stages.
Each line amplifier stage is constructed of the finest parts available, including Mundorf capacitors, AMRG resistors and proprietary output transformers. The design is an improved version of the circuit found in the MK1 version of our L-200, a single ended transformer output design.
A single gain stage is used in each channel, completely free of any feedback, global or local. The output transformers, a custom design made exclusively for Triangle Art, provide low impedance drive to connected equipment. The inputs are protected against extreme infrasonic signals and DC.
The design now uses one 6SN7 dual triode per channel with slightly different operating points and biasing than the prior version. This results in greater overall dynamic contrast and improved fine dynamics as well as greater clarity.
The improved separate internal power supplies for left and right channels produce better sound staging and three dimensionality.
The L-200 MK2 retains all of the Triangle Art “Magic” that the L-200 MK1 is known for and takes it to a new level. Any line source will benefit from being run through the L-200 MK2 and for phono based systems there is no better partner than our own P-200 phono stage, results are nothing short of spectacular and synergistic.
Triangle Art M-100 Mono Amplifiers and L-200 Preamplifier