Integrated Amplifiers Face Off: Arcam A5+ vs Marantz Model 70

Arcam A5+ vs Marantz Model 70: the big picture

An integrated amplifier comparison weighs how two one-box amps combine power, connectivity and sonic character to drive passive speakers while handling both digital sources and analog inputs for vinyl and line-level devices. In this head-to-head, the Arcam A5+ and Marantz Model 70 are mid-range stereo amplifier contenders offering similar power, on-board phono stages and broad digital connectivity, yet they sound quite different and suit different systems and tastes. The Arcam A5+ is the more insightful and dynamically expressive listen, with a richer tonal balance that makes it a compelling all-rounder and current class leader at its price. The Marantz Model 70 counters with a clearer, more even tonal balance, taut bass and HDMI ARC convenience, making it a flexible choice in mixed music-and-TV setups.

Hard specs: where the numbers differ

On paper, the Arcam A5+ and Marantz Model 70 look closely matched. Both are 50W-per-channel integrated amplifiers with moving-magnet phono stages, three line-level inputs, digital inputs, headphone outs and preamp outputs for system expansion. The Arcam adds twin coaxial digital inputs alongside optical, while the Marantz includes HDMI ARC and a dedicated subwoofer output, tilting it toward TV integration and 2.1 systems. Bluetooth support differs too: the A5+ offers aptX Lossless and Auracast, whereas the Model 70 goes with aptX HD. Physically, the Arcam is a little shorter in height but slightly deeper and marginally heavier; the Marantz is taller but a touch lighter and wider. Both omit USB digital inputs, so computer audiophiles will need a separate USB–S/PDIF bridge.

Architecture, impedance matching and sonic character

Although both amplifiers share identical 50W ratings, their tuning and perceived drive feel distinct in real listening. According to one expert review, “Moving to the Arcam reveals its richer tonal balance… the A5+ consistently sounds more insightful and dynamically expressive,” whether you feed it Debussy or Eminem. That richer voicing means the Arcam tends to flatter leaner speakers, adding body and emotional weight at moderate listening levels. The Marantz Model 70, by contrast, is praised for its “clear, balanced and detailed presentation” and “taut and tuneful bass” that stays controlled across a wide range of partnering gear. Up against the Arcam, the Model 70’s more even tonal balance and slightly firmer low end stand out, though it is described as less expressive dynamically. In practice, both handle typical 8-ohm and 6-ohm loads confidently, but the Arcam feels more engaging with complex, dynamic recordings.

Digital, analog and real-world sources

Both amplifiers balance digital connectivity with analog warmth, covering streaming transports, TV sound and vinyl. Each includes a moving-magnet phono stage, three line-level inputs and multiple digital inputs, plus a headphone output and preamp out for future power-amp upgrades. Bluetooth is built in on both, giving convenient wireless playback from phones or tablets, though neither supports DSD files. The Arcam’s strength is how that feature set supports its musical performance: reviewers highlight that the A5+ improves on its already respected predecessor while keeping its insight and accommodating nature, earning it an award at this price. The Marantz focuses on versatility; its HDMI ARC input means you can route TV audio through the system neatly, and its new internal circuit design improves clarity and stability over the PM6007 it replaces. The shared omission of USB digital input is the main connectivity caveat for both.

System matching, room setup and final verdict

The Arcam A5+ is the more convincing musical tool: it pulls you into recordings with stronger dynamics and clearer insight while remaining easy-going with modest speakers and sources. Its slightly richer voicing mates beautifully with neutral or bright speakers in small to medium rooms, where you can position speakers a little away from walls to keep bass from loosening. The Marantz Model 70 is a “clear step ahead” of the PM6007 in clarity, detail and stability, and its even tonal balance plus taut bass suit warmer speakers or more reflective rooms, especially where TV and music share the same system. Casework on the Model 70 is described as less solid than the Arcam, but usability and styling are strong. Ultimately, one reviewer sums it up starkly: “One of these amplifiers is good. The other is great… Overall winner: Arcam A5+”.

Buy if / Skip if

• Buy the Arcam A5+ if you want the most insightful, dynamically expressive sound and plan to focus on pure stereo listening.
• Skip the Arcam A5+ if you need HDMI ARC or a subwoofer output built in for TV-centric or 2.1 setups.
• Buy the Marantz Model 70 if you value a clear, even tonal balance, taut bass and HDMI ARC for integrated TV and music use.
• Skip the Marantz Model 70 if you prioritise emotional engagement and musical drive above all else, where the Arcam remains stronger.
• Buy the Arcam A5+ if you want slightly more solid-feeling build quality along with a class-leading all-round feature set at this level.
• Skip the Arcam A5+ if you prefer the Marantz’s leaner voicing to complement already rich or bass-heavy speakers in a lively room.
• Buy the Marantz Model 70 if you are upgrading from a PM6007-style amp and want a step up in clarity and flexibility without changing speakers.
• Skip the Marantz Model 70 if you expect a USB digital input or DSD support directly on the amplifier, which neither model provides.