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Marantz PM-KI Ruby Black Integrated Amplifier

Marantz

Product Reference

64273

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Condition: New

Brand-new, unused, unopened and undamaged item in original retail packaging (where applicable).

Warranty

Limited 2-3 year warranty.  More info

Order now for delivery on
Mon 25th November 2019

Hurry, only 2 left in stock.

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Was: £3799.00
£2699.00
Hi-Fi News Verdict

Hi-Fi News Verdict

"Not just noteworthy in their own right, these two components gel together to create a sound that's pure 'Marantz'.

Appealing to a wide range of listeners, there's no sense of a celebratory rosy red glow that might otherwise embellish the sound of disc player or amplifier.

They will surely be snapped up by Marantz fans and collectors, but their performance will delight even without the halo of their backstory."

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. It 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 aluminium panes for rigidity and features a laser-engraved Ken Ishiwata signature to commemorate his legacy.

The purely analogue 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 analogue signals passing through the amp, maintaining an analogue environment that’s as pure and clean as possible.

 

Extensive Sound Tuning

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 Musical Premium Phono EQ

Marantz Musical Premium Phono EQ

Designed to deliver optimal sound quality by simplifying the signal path, the Marantz Musical Premium Phono EQ stage in the PM-KI-Ruby amplifier can be used with both moving magnet and low-output moving coil cartridges, thanks to a built-in MC head amplifier. Distortion is reduced by using two-stage amplification in the phono stage, and Marantz HDAMs are combined with JFETs (junction gate field effect transistors) in the input stage, giving high input impedance. The exclusion of coupling capacitors further simplifies the design, reducing signal distortion and enhances signal purity.

Marantz HDAM Technology

Marantz HDAM Technology

The HDAM SA3 circuitry offers the cleanest signal path and optimal dynamics through the amplifier, which delivers 100W per channel into 8ohm speakers, or 200Wpc into 4ohm. The audio signal path is made entirely from discrete components for optimal quality, with the RIAA equalisation split into passive and active components: RIAA correction is carried out by a Marantz HDAM, while the all-discrete amplification runs in minimum-distortion Class A.

High Quality Volume Control

High Quality Volume Control

Newly developed electric volume control uses the latest volume control IC to realize better channel separation, dynamic range and distortion-reduction, while retaining the operational feel of an analogue volume control device. The amplifier employs new Marantz-designed electric volume control for high linearity and best-in-class channel separation.

Current Feedback Amplifier

Current Feedback Amplifier

Current Feedback amplification is a well-known, Marantz-original circuit technology, thoughtfully designed to match the requirements of Super Audio hi-res music for wide-bandwidth, high-speed reproduction. The impedance at the Current Feedback point is limited, generating a very low phase shift. Marantz Current Feedback amplifiers reduce the need for phase compensation by minimizing Negative Feedback (NFB). This simplifies the signal path and results in a high through-rate, excellent transient response and superb sonic transparency across the full bandwidth. Unlike conventional Voltage Feedback topology, Current Feedback also makes the power amplifier insensitive to difficult loudspeaker loads.

Multiple Analogue Inputs and Outputs

Multiple Analogue Inputs and Outputs

In addition to phono and CD analogue inputs, the PM-KI Ruby features two line-level inputs and two pairs of recorder input/output jacks that enable the connection of multiple sources and recorders. Use the PM-KI Ruby as a standalone stereo power amplifier for additional system configuration versatility with the included power amp input, or connect the PM-KI Ruby to an external power amplifier via the stereo pre-amp outputs.

Carefully Selected Components

Carefully Selected Components

Marantz has a steadfast reputation for choosing the best-possible components for its Premium Series products. The Marantz alternative to the “amplifier on a chip” IC components, the HDAM, is a miniature amplifier module built entirely of discrete components. Marantz engineers selected and optimized the HDAM through extensive listening in dedicated Marantz facilities in Europe and Japan. Extensive, painstaking and meticulous tuning has long been the secret of exquisite-sounding Marantz amplifiers. During the development stage, every part is carefully selected, tested and validated by Marantz audio engineers to ensure audio perfection every time you listen.

Built To Perform

Built To Perform

Like the complementary SA-KI Ruby Super Audio CD player, the PM-KI Ruby integrated amplifier is constructed to the highest standards with a copper-plated chasses to reduce mechanical and electrical interference. A front panel constructed from thick, heavy, non-magnetic aluminum panels and an 5mm dense aluminum top cover eliminate added interference. Nickel-plated copper independent input terminals for CD and Phono plus Marantz-original high-quality/high-purity copper-plated speaker terminals ensure the best signal possible.

Balanced Power Amplification

Balanced Power Amplification

Drawing on design elements of the PM-10, the PM-KI Ruby is built to leverage enhancements, maintain the purest possible sound and support the power needed to drive the most demanding speakers. The amplifier output stage of the PM-KI Ruby allows a large power output, delivering 2x100W into an 8ohm load, and easily copes with high-impedance speakers thanks to a 2x200W output into 4ohms. The amplifier module connects directly to the rear panel PCB on the PM-KI Ruby to maintain signal purity and sound stability.

Dedicated Headphone Output

Dedicated Headphone Output

Using Marantz-proprietary HDAM discrete modules, the headphone circuit delivers superb audio fidelity with the widest range of headphone types and impedances, including low impedance headphones.

  • Tick Engineered and extensively tuned by legendary Marantz sound master Ken Ishiwata and his team, drawing on more than 65 years of Marantz amplifier design knowledge
  • Tick Marantz high-resolution preamplifier stage with proprietary HDAM technology
  • Tick Switching power amplifier design derived from flagship PM-10 amplifier
  • Tick Generous output: 100W + 100W (into 8ohm), 200W + 200W (4ohm)
  • Tick Fully-discrete, two-stage design for signal purity, with separate power supplies for preamp and power amplifier sections to reduce interference
  • Tick Toroidal transformer dedicated to preamp for clarity and powerful sound
  • Tick Current feedback design with newly-developed wide-range circuitry
  • Tick HDAM SA3 circuitry for clean signal and optimal dynamics
  • Tick MM/MC Phono input with new discrete Marantz Musical Premium Phono EQ circuit
  • Tick Thick nickel-plated copper independent input terminals for CD and Phono, plus Marantz-original high-quality/high-purity copper-plated speaker terminals
  • Tick Linear volume control with new electric volume system
  • Tick High-quality construction with double-layer chassis, 5mm thick aluminium top lid, solid aluminium front and copper-plated chassis
  • Tick 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
  • Tick Elegant remote control to operate the PM-KI Ruby as well as the complementary SA-KI Ruby Super Audio CD Player
  • Tick Laser-engraved Ken Ishiwata signature and Ruby motif, marking Ishiwata’s 40-year Marantz legacy

While we do our best to keep this information up to date, please be aware that all specifications are subject to change by the manufacturer at any time.

Features

Channels 2
Current Feedback Topology Yes
Phono EQ Marantz Musical Premium
HDAM Version SA3, SA2
Power Transformer: Toroidal / El SMPS
High Grade Audio Components Yes
Customised Components Yes
Symmetric PCB Layout Yes
Aluminium Extrusion Heat Sink Yes (Separate)
Copper Plated Chassis Yes
Balance / Bass / Treble / Loudness Yes / Yes / Yes / No

Others

Linear Drive Power Supply Yes (Pre-Amplifier Stage)
Liniear Volume Control Yes
BI-AMP and Multichannel Option Yes
Shottky Diodes Yes
System Block Shielding Copper
Double Layer Bottom Plate Yes
Low Noise OELD Display Yes
5mm Aluminium Top Plate Yes

Input / Outputs

Audio Inputs 6
Phono Input MM / MC
Audio Outputs 2
Power Amp Direct IN Yes
Gold Plated Cinch Yes / CD & Phono Nickel-Plated
Speaker Terminals Marantz SPKT-100+
Number Of Terminals 2
D-Bus Yes
Floating Control Bus (3.5 mm mono jack x 2) Yes
Headphone Out Yes

Specifications

Power Output (8 / 4 Ohm RMS) 100 W / 200 W
Frequency Response 5 Hz - 50kHz
Total Harmonic Distortion 0.005%
Damping Factor 500
Input Sensitivity: MM 2.3 mV / 39 kohm
Input Sensitivity: MC 250 µV / 100 ohm
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/Rated output)

General

Available Colours Gold / Black
Metal Front Panel Yes
Power Consumption 130W
Standby Consumption 0.2W
Auto Power Off Yes
Detachable Power Cable Yes
Remote Control RC005PMSA
System Remote Function Yes
Maximum Dimensions (W x D x H) 440mm x 453mm x 127mm
Weight 15.7kg

While we do our best to keep this information up to date, please be aware that all specifications are subject to change by the manufacturer at any time.

Marantz PM-KI Ruby Gold Integrated Amplifier

Marantz PM-KI Ruby Gold Integrated Amplifier

Was: £3799.00 Now: £2699.00

Part Exchange Available

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We can take back any type of product we sell, from cables, to projectors, speakers, amplifiers, AV receivers, subwoofers and more.

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  • Make, model and finish of your old equipment
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Please note we don't purchase second hand goods for cash, we take trade-ins as part payment towards the purchase of new equipment.

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Pay monthly plans for up to 60 months, available on purchases between £299 and £25,000.

0% ONIF6 6 Months
0% ONIF12 12 Months
0% ONIF24 24 Months
15.9% ONIB36-15.9 36 Months
15.9% ONIB48-15.9 48 Months
15.9% ONIB60-15.9 60 Months

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Marantz KI Ruby