RealityBroker
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The Martin Logan Purity line included "internally powered, high-resolution 200-watt switching amplifier." Neither their website or literature provides much detail regarding these amplifiers.
Supposedly, "to achieve ultimate performance with the Purity use of the RCA line level connection is recommended. With this input Purity is able to connect directly to devices with variable level control such as digital music players, flat screen televisions, computers, and receivers with pre-amp outputs." Further, under Specs/Impedance it shows: Binding posts ~ 2,000 Ohms; Line level RCA ~ 14,000 Ohms. Compatible with 4, 6, or 8 Ohm rated amplifiers.
Question: Has anyone received additional details from ML regarding these internal amplifiers?
So I guess I'm confused. I assumed one should connect an external 4, 6, or 8 Ohm rated amplifiers to the binding posts, and that the line-level connector was to be used exclusively for digital signal input. Isn't the purpose of the "high-resolution 200-watt switching amplifier" to convert the digital signal to analog before energizing the electrostatics and bass speakers?
Do the Purity amplifiers meet ML's standard? "...the amplifier [should] be stable operating into varying impedance loads: an ideally stable amplifier will typically be able to deliver nearly twice its rated 8 Ohm wattage into 4 Ohms and should again increase into 2 Ohms?"
Supposedly, "to achieve ultimate performance with the Purity use of the RCA line level connection is recommended. With this input Purity is able to connect directly to devices with variable level control such as digital music players, flat screen televisions, computers, and receivers with pre-amp outputs." Further, under Specs/Impedance it shows: Binding posts ~ 2,000 Ohms; Line level RCA ~ 14,000 Ohms. Compatible with 4, 6, or 8 Ohm rated amplifiers.
Question: Has anyone received additional details from ML regarding these internal amplifiers?
So I guess I'm confused. I assumed one should connect an external 4, 6, or 8 Ohm rated amplifiers to the binding posts, and that the line-level connector was to be used exclusively for digital signal input. Isn't the purpose of the "high-resolution 200-watt switching amplifier" to convert the digital signal to analog before energizing the electrostatics and bass speakers?
Do the Purity amplifiers meet ML's standard? "...the amplifier [should] be stable operating into varying impedance loads: an ideally stable amplifier will typically be able to deliver nearly twice its rated 8 Ohm wattage into 4 Ohms and should again increase into 2 Ohms?"