Nº585.5

Nº585.5

Fully Discrete Integrated Amplifier with Class A Pure Phono Stage

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Product Specifications

RIAA frequency response
20Hz to 20kHz, ±0.3dB
Infrasonic filter defeatable, 15Hz, 2nd order (12dB/octave)
Input resistance (Moving Magnet Mode)
47kΩ
Input capacitance (Moving Magnet Mode)
selectable; 50, 100, 150, 200, or 680pF
Gain (Moving Magnet Mode)
40dB @ 1kHz
THD+N, 20Hz to 20kHz, 2VRMS output (Moving Magnet Mode)
<0.03%
Input resistance (Moving Coil Mode)
selectable; 20, 33, 50, 66, 100, 200, 330, 500, 1000, or 47k
Input capacitance (Moving Coil Mode)
50pF
THD+N, 20Hz to 20kHz, 2VRMS output (Moving Coil Mode)
<0.02%, 50 or 60dB settings, <0.04%, 70db setting
Gain (Moving Coil Mode)
selectable; 50, 60, or 70dB @ 1kHz
Output Power
200W RMS per channel @ 8 Ω, 20Hz – 20kHz
Damping Factor
>400 @ 20Hz, referred to 8 Ω
Frequency Response
20Hz – 20kHz, ±0.13dB; 2Hz – 250kHz, +0.2dB/–3dB
Signal-to-Noise Ratio
>98dB (20Hz – 20kHz, unweighted); >103dB (20Hz – 20kHz, A-wtd), referred to full output – maximum volume setting
Voltage Gain
40.7dB (maximum volume setting)
Total Harmonic Distortion
<0.01% @ 1kHz, 200W, 8 Ω; <0.1% @ 20kHz, 200W, 8 Ω
Preamplifier Section (Analog)
Input Impedance
Preamplifier Section (Analog)
Input Overload
Preamplifier Section (Digital)
DAC Board - same as No 585
DAC output voltage @ full scale (0dBFS)
3.7VRMS
DAC frequency response
20Hz to 20kHz, +0 / ¬–0.2dB
DAC THD, full scale (0dBFS)
<0.0001% @ 1kHz, <0.0003% @ 20kHz
DAC SNR (referred to 3.7VRMS / 0dBFS output)
>120dB (A-weighted)
PCM sample rates/bit depth
32, 44.1, 48, 88.2, 96, 176.4, or 192kHz; up to 32 bits
DSD
Native or DoP (DSD over PCM), single- and double-speed (2.8 and 5.6MHz)
RIAA frequency response
20Hz to 20kHz, ±0.3dB
Infrasonic filter defeatable, 15Hz, 2nd order (12dB/octave)
Input resistance (Moving Magnet Mode)
47kΩ
Input capacitance (Moving Magnet Mode)
selectable; 50, 100, 150, 200, or 680pF
Gain (Moving Magnet Mode)
40dB @ 1kHz
THD+N, 20Hz to 20kHz, 2VRMS output (Moving Magnet Mode)
<0.03%
Input resistance (Moving Coil Mode)
selectable; 20, 33, 50, 66, 100, 200, 330, 500, 1000, or 47k
Input capacitance (Moving Coil Mode)
50pF
THD+N, 20Hz to 20kHz, 2VRMS output (Moving Coil Mode)
<0.02%, 50 or 60dB settings, <0.04%, 70db setting
Gain (Moving Coil Mode)
selectable; 50, 60, or 70dB @ 1kHz
Output Power
200W RMS per channel @ 8 Ω, 20Hz – 20kHz
Damping Factor
>400 @ 20Hz, referred to 8 Ω
Frequency Response
20Hz – 20kHz, ±0.13dB; 2Hz – 250kHz, +0.2dB/–3dB
Signal-to-Noise Ratio
>98dB (20Hz – 20kHz, unweighted); >103dB (20Hz – 20kHz, A-wtd), referred to full output – maximum volume setting
Voltage Gain
40.7dB (maximum volume setting)
Total Harmonic Distortion
<0.01% @ 1kHz, 200W, 8 Ω; <0.1% @ 20kHz, 200W, 8 Ω
Preamplifier Section (Analog)
Input Impedance
Preamplifier Section (Analog)
Input Overload
Preamplifier Section (Digital)
DAC Board - same as No 585
DAC output voltage @ full scale (0dBFS)
3.7VRMS
DAC frequency response
20Hz to 20kHz, +0 / ¬–0.2dB
DAC THD, full scale (0dBFS)
<0.0001% @ 1kHz, <0.0003% @ 20kHz
DAC SNR (referred to 3.7VRMS / 0dBFS output)
>120dB (A-weighted)
PCM sample rates/bit depth
32, 44.1, 48, 88.2, 96, 176.4, or 192kHz; up to 32 bits
DSD
Native or DoP (DSD over PCM), single- and double-speed (2.8 and 5.6MHz)

Nº585.5

Evolution The Mark Levinson Nº 585 has swept up best in class awards and countless accolades around the world, and is now widely regarded as perhaps the finest integrated amplifier ever made. Now, the Nº 585.5 redefines the playback quality of a classic medium; by adding the same Pure Phono stage found in the award winning Nº 523 and Nº 526 preamplifiers taking the reproduction of any source material to new heights of realism. Architecture The foundation of the No 585.5 is its fully discrete, mirror-imaged, dual-monaural analog circuitry featuring individual signal switching relays for each of its five stereo inputs: one XLR and three RCA plus a Stereo Pure Phono stage. Volume controls use discrete R2R ladders and low-noise analog switches for the widest possible bandwidth and maximum signal integrity. The fully-differential Class AB power stage includes an oversized 900VA toroidal transformer with individual secondary windings for the left and right channels. Amplification Each elegantly simple amplifier channel utilizes twelve output transistors and multiple smaller local capacitors that allow them to be placed physically closer to the amplifiers for greater transient response when power is needed immediately. This robust architecture results in a conservative power rating of 200W per channel. System integration and expansion are possible using the stereo RCA pre-outs which can operate full-range or with an included switchable, second-order, 80Hz crossover filter allowing for seamless integration into 2.1-channel systems with powered subwoofers. Pure Phono: Class A for a Classic Medium The Pure Phono stage is a discrete design with no op-amps and operates exclusively in class A throughout, employing tantalum nitride thin-film resistors and polypropylene capacitors with exceptionally low tolerances. A fixed-gain moving magnet (MM) section with five capacitive cartridge-loading settings, and a moving coil (MC) section with three gain settings and 10 resistive cartridge-loading settings ensures optimization for any cartridge. And an ultrasonic filter intelligently compensates for rumble and warping. The Pure Phono stage also contains physically separated channels and balanced inputs for sonic purity. Audio Chassis Building upon this superb analog platform, the Nº 585.5 adds equally outstanding digital audio capability. An ESS Sabre 32-bit O/A convertor with proprietary jitter elimination circuitry and fully balanced, discrete IN circuitry forms the heart of the digital audio processing stage. Six digital audio inputs are provided including one AES/EBU, two coaxial and two optical plus a USB audio processor capable of asynchronous data transfer of high resolution DSD and PCM files at up to 192kHz/32 bits resolution. For low-resolution audio formats, proprietary Clari-Fi'" signal processing reconstructs information and bandwidth lost in compressed file formats restoring them to higher fidelity. Control System integration and communication ports include Ethernet, USB, RS-232, IR input, and 12V trigger input and output. An iconic Mark Levinson custom cast aluminum system IR remote is included with the Nº 585.5. Construction The chassis of the Nº 585.5 utilizes card-cage architecture to isolate critical low-level analog and digital circuitry from the power supplies and amplifier modules. The steel and aluminum construction features internal amplifier heatsinks and Mark Levinson's iconic black and silver anodized aluminum front panel with its intuitive twin-knob control system and unique red display. A newly designed 3-piece anodized brushed aluminum top cover exudes durability, elegance and quality.

Unlock the full potential of your digital music collection. The № 585.5 contains a premium Precision Link Digital-to-Analog Converter (DAC) that accurately reproduces audio signals and minimizes noise, so you hear the truth, passion and detail of every note.
Fill your home with distortion-free sound. The № 585.5 contains an oversized toroidal transformer and massive capacitors that deliver all the headroom you need for your most dynamic performances.
Our proprietary approach to circuit design delivers uncompromising musical purity and an engaging listening experience. By using discrete components carefully selected for their precise function, the № 585.5 delivers unmatched sound quality that captures the nuances of every note.
Mark Levinson’s innovative R-2R ladder volume control provides balanced and consistent sound. Discern subtle details in your music, even at low volume.
Connect and control the № 585.5 through Ethernet, RS-232, IR input or the custom aluminum remote.
Seamlessly integrate into your home theater system with SSP mode, allowing your Surround Sound Processor to control both the left and right loudspeakers powered by your № 585.5.

FAQs & How-Tos

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  • General Answer: When an input is set to SSP mode the No.585 acts as a simple amplifier. In other words, the volume control in the No. 585 is disabled and the gain of its preamp is set to 1, so the No. 585 functions as if the signal source were connected directly to its power amplifier channels. However, under typical listening conditions, a preamp is almost always operated with a gain of significantly less than 1. In fact, for the preamp in the No. 585 to operate at a gain of 1 requires its volume to be set between 66 and 67, which is likely much higher than anyone sets their volume control for ordinary listening. This high effective volume setting in the No. 585 is necessary so that the volume control in the connected AVR/AVP can be used effectively. But if that AVR/AVP is noisy, or if the audio system is set up in an area susceptible to electromagnetic noise, the noise will be reproduced through the No.585. This will be most evident when there is no audio playing through the system but is usually imperceptible when audio is present. In the SSP mode the No.585 system does not introduce noise, but simply amplifies whatever is present on that input. For the best performance care must be taken with the volume level of the source, and it is recommended to always use the balanced inputs (XLR connectors - see owner’s manual for details) for any inputs you plan to set to SSP mode. Technical Explanation: In the past, the differing number of channels in each component made integration between two-channel and multichannel components difficult. Sending multichannel processor output signals to a stereo Preamplifier distorts calibrated processor output levels. Multichannel processor volume controls adjust the relative volume level of all channels in unison. However, stereo Preamplifier volume controls adjust the relative volume level of just the front left and right channels, leaving the center, surround, and subwoofer channels unaffected. To avoid these problems when the No.585 is connected with an associated surround-sound processor, the SSP mode allows selected input sources to pass through the No.585 without interference. When SSP mode is activated the No.585 volume control is deactivated to prevent the No.585 from distorting channel balance. As a result, the processor controls the relative volume level of all channels while maintaining its calibrated output levels. To connect the No.585 with a surround-sound processor (see illustration in owner’s manual): 1. Make sure the No.585 and all associated components are powered off and disconnected from electrical outlets. 2. Connect the output connectors on the surround-sound source component to the input connectors on the surround-sound processor. For example, if the source component is a Blu-ray disc player, connect it to the appropriate input connectors on the surround-sound processor. 3. Connect the front left and right output connectors on the processor to the desired input connectors on the No.585. For best performance, use balanced connections whenever possible. 4. Connect the center, surround, and subwoofer output connectors on the processor to the appropriate input connectors on the power amplifier(s). 5. Connect the No.585’s speaker outputs to the system’s front left and right (main) speakers. To activate the SSP mode for a selected input: CAUTION: Before activating the SSP mode for any input, set the associated surround sound processor volume control to a reasonable level to prevent sending dangerous signal levels to the associated loudspeakers. 1. Activate the Setup menu by pressing the Setup button. 2. Select Input Setup, and press Enter. 3. Select the input you wish to configure for SSP use, and press Enter. 4. Select SSP, and press Enter. 5. Set the SSP parameter to On. 6. Press the Setup button four times to step backward through the menu hierarchy and exit the Setup menu.

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