Mark Levinson No.432 Stereo Power Amplifier, 230Voltage
Brand New in Box, Not Used before. Made in USA
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USD 6,000.00 |
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USD 6,000.00 |
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| Start Time |
Tuesday, November 25, 2008 |
| End Time |
Monday, December 29, 2008 |
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Hong Kong |
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Description
This is one set brand new in box, not used before Mark Levinson Nº 432 Stereo Power Amplifier in 230V, Single Phase.Made in USA ChassisThe Nº 432 is designed to accommodate standard shelf and rack-mount installations while retaining a strong visual connection with other Mark Levinson amplifiers and source components. Their thermal management systems all use an exposed internal heatsink. This results in a smooth, elegant appearance and adds a considerable measure of safety while handling the amplifiers. Rear-panel handles also provide an unexpected level of convenience as well as protection for input, output, and control connectors. Rack-MountingEach chassis fits precisely into all standard equipment racks. For demanding custom installations, proper ventilation, and hidden cable routing, we provide shelves specifically for these amplifiers. Control and CommunicationAs music and cinema systems grow more complex, integrating individual components takes on greater importance. To this end, these amplifiers feature an entire suite of control and communications capabilities. A DC trigger input allows a remote unit (preamplifier or surround sound controller, for example) to switch each amplifier from standby to fully operational status, even after AC power has been temporarily lost. A complementary trigger output lets you or an installer ?daisy-chain? multiple amplifiers so they can be controlled from a single low-voltage source. The additional Mark Levinson Link ports allow communication and automation features among components in a complete Mark Levinson system. As a final sophisticated touch, RS-232 communication ports extend compatibility to any standard external control system. Thermal ManagementHigh current amplifiers must expel potentially damaging heat from the chassis. Traditional techniques include passive external heatsink assemblies where heat-producing power transistors are mounted directly on finned aluminum extrusions that are subsequently convection-cooled by the air rising past the fins. This approach has been successfully used by other Mark Levinson amplifiers and we have continued its use in these models. ProtectionThe Nº 432 offer a complete protection system to extend their useful life and guard against damage to adjacent system components. Servos correct for up to ± 1V of direct current (DC) offset from a source component. This prevents potentially harmful DC from reaching the loudspeakers. Thermal sensors monitor the operating temperature of the amplifier, switching it off before it can over-heat. Excessive current drawn from the amplifier may indicate a component failure or shorted loudspeaker connection. In either case, the amplifier will switch itself off to prevent unnecessary damage. Expensive power supply components are protected from turn-on transients and power line spikes as is standard on all Mark Levinson equipment. Audio circuitryThe audio circuits, from power supply to output stage, are designed and voiced to allow seamless use with other Mark Levinson amplifiers. You can build a multi-channel system with full confidence that these amplifiers will integrate fully with your current and future selection of Mark Levinson components. Power SupplyEach channel of these models benefits from a totally separate power supply. You can rest absolutely sure that each channel's performance will never be compromised by simultaneous demands from more than one signal. But separation alone does not ensure amplification circuits of sufficiently clean and stable power. Oversized transformers, filter capacitors and conductors make important contributions to performance, while bypass capacitors and voltage regulators further purify the power digested by the audio circuits. Perfectly clean, instantly available power allows the circuitry to perform properly without introducing noise and distortion into the audio signal.An installation-friendly detachable power cord simply increases flexibility. These amplifiers will go where you want them to. But they'll do only one thing , provide extraordinary Mark Levinson sound quality wherever you put them. Voltage Gain StageI homage to past Mark Levinson successes, the sensitive voltage gain stages in the Nº 431,432, and 433 are powered from DC regulator amplifiers. The voltage gain stages are also fully balanced, with their sonic performance further optimized with Arlon® 25N cyanate ester circuit board material. We use Arlon rather than less costly circuit board materials for a simple reason: It is better. In particular, Arlon?s stable dielectric constant permits much more precise transmission of the low-level analog AC signals processed by the amplifier?s voltage gain stage. The result is higher resolution, better bass definition, greater focus, and more precise control over dynamics. Current Gain StageOutput devices, selected after extensive technical and sonic evaluations, are the same as those used in other Mark Levinson amplifiers. This helps maintain the signature ?Levinson sound? that has distinguished our products for many years. These carefully-chosen individual components also allow us to optimize PC board layout and improve power distribution throughout the output (current gain) stage. In addition, we use "adaptive biasing" to manage the output stage's power source for best performance without excessive heat or wasted energy. First developed for the Nº 33 Reference Monaural Amplifier, adaptive bias technology has proven its worth in thousands of Mark Levinson amplifier installations as it combines the sonic benefits of low switching distortion common to class A designs with the efficiency of typical A/B amplifiers.The result is a sonic character that suggests unlimited reserves of power while retaining the finesse associated with the best sounding low-power amplifiers. Sonic PerformanceThe single most important feature of these new amplifiers is the one that alone justifies their purchase: Performance. Initially intended to simply match the sonic quality of previous designs, the Nº 432 actually eclipse that goal. Since they share circuit topologies and materials with previous designs, their sonic character is similar. The benefit, obviously, is that owners of a 300 Series amplifier, for example, may add one or several channels to their system without sonic compromise. In fact, the careful parts selection allowed our design team to further refine performance. These amplifiers share some of the sonic attributes of the Nº 33 and Nº 33H, including higher resolution and dynamics, and a greater sense of effortlessness. They are as well suited to a top quality two-channel music system as they are to a world-class multi-channel music and theater system.Nº 432 Power Amplifier Specifications Specifications subject to change without notice. Not responsible for typographical errors Connector Complement: Four custom binding postsTwo 3-pin XLR balanced input connectorsTwo RCA input connectorsTwo 1/8" mini-jacks for remote turn-onOne RS-232 port on RJ-11Two Mark Levinson communications ports on RJ-11, RJ-45One IEC-standard AC receptacle Damping Factor: Greater than 400, 20Hz - 20kHz at 8ohms Dimensions: 17.75"w × 7.65"h × 20.1"d Frequency Response: Within 0.3dB from 20Hz - 20kHz Input Impedence: 100kohms (balanced)50kohms (unbalanced) Input Sensitivity: 2.83V output: 130mV, full output: 2.58V Mains Voltage: determined by the needs of country for which the unit was manufactured; cannot be reset by dealer or user Output Impedence: Less than 0.02ohms from 20Hz - 20kHz Power Consumption: 650W in on, 130W in standby, 10W in sleep Power Output: 400 w/ch rms power at 8ohms800 w/ch rms power at 4 ohms Shipping Weight: 125lbs (57kg) Signal to Noise Ratio: Better than -65dB (ref.2.83V) Voltage Gain: 26.8dB Shipping to USA is FREE SHIPPING by DHL & Shipping to Worldwide is US$200- by DHL. If you have any other questions, please don't hestiate to contact juki@leonidasltd.com
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