For his 40 years ruby anniversary at Marantz, Ken Ishiwata and his daring team crafted these two audiophile gemstones with hand-selected and custom-made components to carry all the emotions of music. The KI Ruby Series is precision-made and virtuously tuned to deliver the most enjoyable sound to amplify your senses.

• Collector‘s item
• Individually numbered
• Limited to 1.000 sets

Few hi-fi companies, if any, can say that one person has steered their sound for four decades – like Ken Ishiwata does at Marantz. The KI Ruby SACD player and amplifier go beyond even the standards of past KI Signature achievements, embodying all of Ken Ishiwata’s experience and expertise. Therefor they carry Ken Ishiwata’s signature as integral part of their design

The PM-KI Ruby Amplifier.

The PM-KI Ruby is built with just one aim – audio performance – which is why it uses a fully discrete two-stage design with separate power supplies for the preamplifier and power amp section to reduce interference, and draws on the design of the flagship PM-10 amplifier with its moving coil/moving magnet phono stage and Marantz HDAM technology throughout for signal purity.

• Engineered and extensively tuned by a team led by Ken Ishiwata, drawing on more than 65 years of Marantz amplifier design knowledge
• Marantz high-resolution preamplifier stage using proprietary HDAM technology
• Switching power amplifier design derived from flagship PM-10 amplifier
• Generous output: 100W + 100W (8 ohm), 200W + 200W (4 ohm)
• 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 precision sound
• Dedicated headphone amplifier with alldiscrete construction featuring HDAM-SA2
• Linear volume control with new electric volume system
• Laser-engraved ‘Ken Ishiwata’ signature and Ruby motif, marking Ken Ishiwata’s 40 years with Marantz

The SA-KI Ruby Super Audio CD-Player.

The SA-KI Ruby carries the DNA of exceptional ancestors, designed to take the CD performance of Marantz models to the ultimate level. Now there’s a new classic. The SA-KI Ruby delivers the kind of sound able to bring you closer than ever to your favourite music.

• Engineered and extensively tuned by a team led by Ken Ishiwata, drawing on more than 35 years of Marantz expertise in CD players
• In-house-developed SACD/CD mechanism “SACDM-3”, designed purely for audio
• SACD/CD playback, and playback of compilations on CD-ROM and DVD-ROM
• Asynchronous USB input for hi-res audio up to PCM / DXD 384kHz/32 bit and DSD11.2MHz
• Isolation of USB and digital inputs to block noise from internal and external sources
• Innovative Marantz Musical Mastering ‘MMM-Stream’ upsampling to DSD and filtering
• Custom-designed 1-bit direct ‘MMM – Conversion’ from DSD to analogue
• New analogue output stage with Marantz HDAM-SA3 and HDAM-SA2 technology and low impedance output
• Power supply using toroidal transformer
• Dedicated headphone amplifier with alldiscrete construction featuring HDAM-SA2
• Laser-engraved ‘Ken Ishiwata’ signature and Ruby motif, marking Ken Ishiwata’s 40 years with Marantz