MODEL 50 Integrated Amplifier

MODEL 50 Integrated Amplifier


Introducing the Marantz Model 50 Integrated Amplifier, a masterpiece of audio engineering and craftsmanship. Designed to deliver unparalleled sonic performance, the Model 50 combines cutting-edge technology with timeless design, embodying Marantz’s legacy of excellence in audio reproduction.

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Introducing the Marantz Model 50, a premium integrated stereo amplifier that sets a new standard in audio performance and design. Boasting 70 watts per channel of Marantz’s unique current-feedback power and featuring HDAM-SA3 circuitry, the Model 50 delivers impeccable control and clarity to your music, ensuring an immersive listening experience with any loudspeaker setup.

Designed with a perfect blend of modernity and timelessness, the Model 50 embodies Marantz’s commitment to both cutting-edge technology and iconic design cues. From its symmetrical layout to its tactile satisfaction, every aspect of the Model 50 exudes elegance and sophistication, reminiscent of audio equipment classics.

Key Features:

  • Powerful and precise Class A/B amplifier: The Model 50’s high-current, dual-device amplifier effortlessly drives even the most demanding loudspeakers, revealing every nuance of your music with authority.
  • All analogue design: Analog purity is at the heart of the Model 50’s design philosophy, ensuring intuitive operation and eliminating interference from complex digital circuitry.
  • HDAM-SA3 circuitry: Marantz’s proprietary HDAM-SA3 circuitry enhances audio performance, delivering unparalleled sound quality and fidelity.
  • Six Analogue Inputs: With an array of analogue inputs, the Model 50 accommodates various source components, offering upgraded connectors for CD and phono inputs.
  • Stereo Preamp Out: The stereo preamp outputs provide added flexibility to your audio system setup, allowing you to connect a subwoofer, expand your home theatre system, or create multiple listening zones.
  • MM Phono pre-amp with Marantz Musical phono EQ: The built-in MM phono stage amplifies the nuance and tone of your vinyl records, utilizing a new circuit design without distortion-inducing coupling capacitors.

Experience the powerful yet precise performance of the Marantz Model 50, where every detail matters and every note shines. Elevate your listening experience with the timeless elegance and exceptional sound quality of the Model 50 integrated amplifier from Marantz.

More Information
Model Number MODEL50/AU1
Specs Features
Channels 2
Current Feedback Topology Yes
Phono EQ Standard / Marantz Musical / Marantz Musical Premium: – / o / –
Digital in USB-B / optical / coaxial / USB-A: – / – / – / –
HDAM version SA3, SA2
Power Transformer Toroidal / El: Yes / –
High Grade Audio Components Yes
Customised Components Yes
Symmetric PCB Layout Yes
Aluminium extrusion heat sink Yes
Balance / Bass / Treble / Loudness Yes / Yes / Yes / –
Linear Drive Power Supply Yes
Linear volume control Yes
Schottky diodes Yes
Input buffer amp (all inputs / CD only) – / Yes
Solid Heat Sinks Yes
System block shielding Copper / metal / none: – / – / Yes
Double Layer Bottom Plate triple
Low noise OLED display Yes
Source Direct Yes
Power Amp direct Yes
Audio Inputs 6
Digital in USB-B / optical / coaxial / USB-A: – / – / – / –
Phono Input MM / MC: Yes / –
Audio Outputs 1
Balanced In / Out – / –
Pre-out / Main-in Yes + subwoofer / –
Power Amp Direct IN Yes
Gold Plated Cinch Yes
Speaker A / B Yes
Speaker Terminals Marantz SPKT-1+
Number of terminals 4
D-Bus Yes
Headphone Out Yes
Power Output (8 / 4 Ohm RMS) 70 W / 100 W
Frequency Response 5 Hz–100 kHz
Total Harmonic Distortion 0.02 %
Damping Factor 100
Input Sensitivity MM: 1.4 mV / 47 kΩ
Signal to Noise Ratio MM/MC: 87 dB / –
Input Sensitivity High level: 185 mV / 16 kΩ
Signal to Noise Ratio High level: 116 dB (2 V input)
Input Sensitivity Power Amp Direct IN: 1.5 V / 15 kΩ
Signal to Noise Ratio Power Amp Direct IN: 125 dB
Treble Control ± 10 dB at 15 kHz

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At Len Wallis Audio, whether you’re purchasing in store, over the phone or online through our ecommerce store, we want you to be completely satisfied with your purchase.

Our Refund, Return and Repairs Policy is here to clarify any concerns or questions you might have prior to you making a purchase from us. This way you can be sure of our policy on refunds, returns and repairs and your rights under the Australian Consumer Law.

We also recommend you immediately inspect any goods that you receive from us to ensure you are completely satisfied with the goods, including that the goods are of acceptable quality, and match the description we have provided to you.

If you have any questions about this policy, please contact us at or 02 9427 6755

We require a receipt or proof of purchase.

  • Please do not send your purchase back to the original manufacturer.
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    • Any item not in its original condition, is damaged or missing parts for reasons not due to our error
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Consumer Guarantees and Your Rights under the Australian Consumer Law

Refer to our page for more information.

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If any goods arrive damaged, please contact us as soon as possible. Len Wallis Audio will arrange to have the damaged goods returned and either arrange for a replacement of the goods or refund the price to you. Damaged goods must be returned in the condition received by you with all original packaging, accessories and/or manuals.


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You may visit Len Wallis Audio and a staff member will assist you with any return or repair. This may include inspecting the goods, arranging for the goods to be repaired, or providing you with a replacement.

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If any goods cannot be easily returned to us due to their size, the fault or because they have been affixed or installed in your premises, please contact us and we will arrange an inspection to assess the goods.

Goods returned for repair will be assessed and/or repaired within a reasonable time. You may be provided with an indicative repair time, which time may vary due to reasons beyond ours or the repairer’s reasonable control, such as part availability and incorrect fault description.

You may be required to pay labour, assessment and/or freight fees, such as where goods are assessed to have been damaged by misuse or accident, or where your rights under the Australian Consumer Law or any manufacturer’s warranty do not apply. We may provide you with an indicative fee, which may vary due to reasons beyond our control.

If any goods that you return are capable of retaining user generated data such as files stored on a hard drive, and songs stored on a portable media player, the replacement or repair of the goods may result in loss of the data. In these circumstances, we recommend you back up data to prevent data loss, and remove sensitive or confidential data, as a party assessing and/or repairing your goods may be required to view data in the course of carrying out the assessment. We will not be responsible for any data loss.

In some circumstances, goods presented for repair may be replaced by refurbished goods of the same type rather than being repaired. Refurbished parts may be used to repair the goods.

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Where you have any questions or concerns relating to your Order, please immediately contact us

We understand that sometimes you may simply change your mind about a purchase or have made a wrong selection. In these situations, you have 14 days in which to return your item for a refund, exchange or store credit. If more than 14 days has passed since your purchase we can’t offer you a refund, exchange or store credit.

To be eligible for a return, refund or store credit your item must be in the same condition that you received it. Which is to say, it must be in the original unopened packaging, and in ‘brand new’ saleable condition.

Please note that current Australian Consumer Law does not require us to offer a ‘Change of Mind’ refund. Rather Len Wallis Audio offers 14 day ‘Change of Mind Policy’ in good faith. For more information on consumer rights and guarantees, please visit the Australian Competition and Consumer Commission web site.