Interesting links:

Specifications Marantz SM-17 power amplifier
Rated power output (20 Hz to 20 kHz, 2CH simultaneous drive):
60 W x 2 (8 Ohm load)
80 W x 2 (6 Ohm load)
100 W x 2 (4 Ohm load)
(20 Hz to 20 kHz, BTL drive): 200 W x 1 (8 Ohm load)
Total harmonic distortion (20 Hz to 20 kHz, 2CH drive, 8 Ohm load): 0.01 %
Cross-modulation distortion (SMPTE): 0.01 %
Output bandwidth (8 Ohm load, 0.04 %): 10 Hz to 50 kHz
Frequency response (CD, SOURCE DIRECT): 5 Hz to 100 kHz, +0/-1 dB
Damping factor (8 Ohm load, 20 Hz to 20 kHz): 100

Input sensitivity/input impedance
MAIN IN: 1.6 V/22 kOhm
S/N (IHF A network, input shorted): 76 dB

Supply voltage
F version: 100 V AC, 50/60 Hz
/N1, /S1 version: 230 V AC, 50 Hz
/U1 version: 120 V AC, 60 Hz
Power consumption: 180 W

Dimensions ( Maximum )
Width: 458 mm
Height: 110 mm
Depth: 407 mm

Weight 15.5 kg

SM-17 Stereo power amplifier
The Marantz SM-17 Premium Series stereo power amplifier is a no-compromise audio component designed and engineered to provide extraordinary sonic performance. The SM-17 is constructed using only the highest-quality components, meticulously selected for optimum sonic purity. The Marantz SM-17īs appearance is as its sound quality, available in black or gold finish with a clean, uncluttered front panel that combines modern styling with a touch of "retro" elegance. The SM-17 is designed to complement Marantzīs PM-17mkII'M' (KI), to bring out a even better fidelity, resolution and musicality in either a bridged or bi-amping setup.

  • Current Feedback amplification
  • BTL switch mode
  • Super Ring transformer
  • HDAM
  • WBT terminals
  • Linear Drive Power Supply (LDPS)

  • Controlled and solid drive of even the most demanding loudspeakers
  • Raising the output power and increasing stability by bridging two amplifiers into one amplifier
  • Ultra low vibration and leakage flux keep the signal sharp and minimises internal electro magnetic distortion
  • High slew rate and superb dynamics characterise the unique Marantz HDAM output stages
  • Ultimate audio transfer from premium class speaker terminals
  • Marantz designed power supply to give stable but responsive power delivery

Technological glossary:

Current Feedback amplification
Unlike conventional voltage feed back amplification, the Current Feedback amplification makes the power amplifier insensitive to difficult loudspeaker loads.

BTL switch mode
Marantz designs their amplifiers to have robust power outputs. For the very demanding listener Marantz offers the ability to extent with separate stereo power amplifiers. These amplifiers can be used in BTL mode. When operating in BTL, the amplifiers operates as a mono amplifier with more then twice the power rating. By offering the normal mono signal to the left channel and the inverted signal to the right channel of the power amplifier, the difference signal represents the amplified monaural signal.

Only the best is good enough! In order to use equipment from several brands together in one system, the audio industry made a signal pre-out standard. To convert the audio signal to this specification, every audio device has been equipped with Opamps (operational amplifiers) for which integrated circuit are commonly used. Unfortunately these IC's do not match the very high requirements of Marantz. Marantz developed it's own discrete circuit boards. These HDAM's consists of discrete surface mount components with short mirror image L/R signal paths. These devices are doing exactly the same thing as the Op-amps, but outperform the regular integrated circuit Op-amps dramatically in terms of the Slew Rate, resulting in a much more dynamic, accurate and detailed sound.

WBT terminals
WBT is a specialised company which is fully dedicated towards designing and producing high quality audio connectors. Their products are fully accepted as the reference for audiophile products. For this reason Marantz equips our premium products with WBT connectors.

Super Ring transformer
Super-Ring transformer has the same advantage with a toroidal transformer such as high efficiency, stability, and speed. In addition to that the super ring transformer outperform the toroidal transformer on certain aspects. Thanks to its round shape of the core, the super ring transformer's electro-magnetic radiation and mechanical vibration are extremely low.

Continued research has revealed a new area of refinement: the power supply noise. Marantz has developed the Current Conversion Noise Elimination (CCNE), which improves the mid-band to high frequency signals, through a clear elimination of high frequency distortion in the amplifier output. This offers the listener a sweeter sound with improved high frequency definition.

Linear Drive Power Supply (LDPS)
Marantz' Linear Drive Power Supply (LDPS) makes sure that there will always be enough power available to drive the speakers even with the very highest dynamics. The LDPS also enables the amplifier to drive difficult speaker loads.