MarantzPM-KI Ruby Ken Ishiwata SignaturenewMarantz PM-KI Ruby Ken Ishiwata Signature Reference Integrated Amplifier es***I accept only money order from USPS or from Amscot. "No Paypal". ***New, just purchased a 14 days ago.and paid $3999Comes with box, manual, remote and 5 years of warranty. ...3990.00

Marantz PM-KI Ruby Ken Ishiwata Signature Reference Integrated Amplifier es [Expired]


no longer for sale

***I accept only money order from USPS or from Amscot. "No Paypal". ***



New, just purchased a 14 days ago.and paid $3999
Comes with box, manual, remote and 5 years of warranty.

  • Specifications

    Power Output (8 / 4 Ohm RMS) 100 W / 200 W Frequency response 5 Hz-50 kHz Total Harmonic Distortion 0.01% Damping Factor 500 Input Sensitivity: MM 2.3 mV / 39 kOhm Input Sensitivity: MC 250 Signal to Noise Ratio: MM/MC 88 / 75 dB Input Sensitivity: High level 220 mV / 13 kOhm Signal to Noise Ratio: High level 107 dB (2V input) Input Sensitivity: Power Amp Direct IN 1,1V / 13 kohm
Power Consumption in W 130 W Standby Consumption in W 0,2 WMaximum Dimensions (W x D x H) in inches 17.32 x 17.83 x 5 Weight in lbs. 34.61


Marantz PM-KI Ruby Ken Ishiwata Signature Reference Integrated Amplifier
Marantz has been designing and making amplifiers for more than 65 years, and for 40 of those the products have reflected expertise of Ken Ishiwata. Now, to mark his four decades with the company, the PM-KI Ruby amplifier has been developed and tuned by a highly experienced engineering team led by KI himself. . Features a fully discrete two-stage design with separate power supplies for the pre-amplifier and power amp — plus, a moving coil/moving magnet phono stage complete with Marantz Musical Premium Phono EQ circuit and Marantz HDAM technology for signal purity and exceptional audio quality. PM-KI Ruby is built on a vibration-resistant double layer chassis with thick aluminum panes for rigidity and features a laser-engraved Ken Ishiwata signature to commemorate his legacy.
Key Features

Engineered and extensively tuned legendary Marantz sound master Ken Ishiwata and his team, drawing on more than 65 years of Marantz amplifier design knowledge
Marantz high-resolution preamplifier stage with proprietary HDAM technology
Switching power amplifier design derived from flagship PM-10 amplifier
Generous output: 100W + 100W (into 8ohm), 200W + 200W (4ohm)
Fully-discrete, two-stage design for signal purity, with separate power supplies for preamp and power amplifier sections to reduce interference
Toroidal transformer dedicated to preamp for clarity and powerful sound
Current feedback design with newly-developed wide-range circuitry
HDAM® SA3 circuitry for clean signal and optimal dynamics
MM/MC Phono input with new discrete Marantz Musical Premium Phono EQ circuit
Thick nickel-plated copper independent input terminals for CD and Phono, plus Marantz-original high-quality/high-purity copper-plated speaker terminals
Linear volume control with new electric volume system
High-quality construction with double-layer chassis, 5mm thick aluminum top lid, solid aluminum front and copper-plated chassis
High-grade, carefully selected audio parts: ultra-low leak current Schottky diodes, low noise complementary transistors, high-grade resistors, newly developed custom electrolytic capacitors, audio grade film capacitors and mica capacitors.
Laser-engraved Ken Ishiwata signature and Ruby motif, marking Ishiwata’s 40-year Marantz legacy

Celebrating 40 Years of Passion

Designed to celebrate the 40-year anniversary of legendary Marantz sound master, Ken Ishiwata, PM-KI Ruby features pinnacle performance that’s synonymous with Marantz excellence. Complete with thoughtful engineering, painstaking tuning and extensive listening sessions, PM-KI Ruby achieves the elevated output worthy of its name. Elegantly shows Ishiwata’s laser-engraved signature to commemorate the design and heightened listening experience that honors the decades-long partnership between him and Marantz.

Extensive Sound Tuning

Led by Ken Ishiwata’s extensive, meticulous approach to tuning, the larger Marantz engineering team applied more than 65 years of experience and HiFi knowledge to create PM-KI Ruby, resulting in a final product that is a testament to Ken Ishiwata and the Marantz legacy.

Marantz HDAM Technology

Marantz developed its own discrete circuit boards called Hyper-Dynamic Amplifier Modules, or HDAMs, to replace the chip-based amps used elsewhere. Using discrete surface mount components with short mirror-image left and right signal paths, HDAMs outperform the regular integrated Op-amps dramatically in Slew Rate and noise level. The result is much more dynamic, accurate and detailed sound. Over the years, Marantz has developed different HDAMs to fit the particular requirements of players and amplifiers. The PM-KI Ruby uses the latest high-grade SA3 version. Combined with optimized circuit design layout and carefully selected components, the PM-KI Ruby provides exceptional sound quality and performance.

Pure Analog Design

The purely analog design of the PM-KI Ruby contributes to its noise-reduction structure and clean build. Rather than build the DAC into the amplifier, which would add noise within the chassis, Marantz built the PM-KI Ruby without one and then implemented the DAC in the SA-KI Ruby Super Audio CD Player. This eliminated interference with the delicate analog signals passing through the amp, maintaining an analog environment that’s as pure and clean as possible.