Marantz
Marantz Model 15 Stereo Amplifier
Best vintage power amplifier for audiophiles seeking pristine, isolated channel performance.
The Marantz Model 15 Stereo Amplifier, a landmark in audio engineering from 1965, stands as Marantz's inaugural solid-state amplifier. It boasts two independent monophonic amplifiers, each with its own power supply, ensuring isolated channels for pristine sound without power loss or cross-talk. Its direct-coupled design guarantees immediate overload recovery and consistent full-rated power across the entire frequency spectrum. Celebrated for its exceptional reliability, the Model 15 is engineered for enduring performance, setting new benchmarks in amplifier technology. Experience unparalleled audio fidelity with rich, detailed sound and impressive clarity.
$995.00
Owner Satisfaction
4.8
/ 5
Category Rank
168
/ 1684
#168 in Power Amplifiers
Price vs Category Average
-88%
Below average
Power output
808
/ watts per channel into Ω (stereo)
Who it's for
- Investors looking for high-value, historically significant audio gear
- Audiophiles seeking a warm, classic musical sound profile
- Collectors wanting a centerpiece for vintage audio setups
Who should skip it
- Users requiring modern safety features for equipment protection
- Buyers unwilling to invest in professional restoration services
- Listeners using power-hungry, low-efficiency modern speakers
Performance breakdown
Channel Isolation
Independent dual-mono power supplies eliminate cross-talk for pristine stereo separation.
Transient Response
Direct-coupled design ensures rapid recovery and tight control over musical peaks.
Frequency Linearity
Maintains consistent power delivery across the entire audible frequency spectrum.
Build Integrity
Heavy-duty metal construction provides a robust foundation for long-term reliability.
Impedance Versatility
Handles a wide range of speaker loads from 4 to 16 ohms.
Signal Clarity
Low harmonic distortion delivers a clean, transparent sound profile for critical listening.
Key Specs
Power output
80 watts per channel into 8Ω (stereo)
Frequency response
10Hz to 60kHz
Total harmonic distortion
0.1%
Signal to noise ratio
90dB
Dimensions (without cabinet)
15 ⅜ x 8 x 5 ¾ inches
Weight
34 lbs
Material
Metal
Mounting location
Home
Features
- Marantz's first solid-state amplifier
- Isolated dual-mono power supplies
- Direct-coupled design for instant recovery
- Full power across all frequencies
- Wide impedance compatibility (4-16 ohms)
- Built-in protection circuit
- Exceptional clarity and power
- Timeless aesthetic design
What customers say
The Marantz Model 15 Stereo Amplifier earns deep loyalty for its exceptional build quality and signature sound. Owners consistently praise its warm, rich, and detailed audio profile, noting its musicality and depth that bridges tube and solid state eras. While vintage upkeep is expected, enthusiasts find the investment worthwhile. The amplifier is revered as a centerpiece of high fidelity, celebrated for its aesthetic and powerful performance that remains highly satisfying for dedicated collectors seeking classic Marantz engineering.
Know before you buy
The Model 15 features two completely independent amplifiers, each with its own dedicated power supply. This isolation prevents cross-talk between channels and ensures that one channel's power demand does not affect the performance of the other, resulting in cleaner, more stable audio.
Yes, the Model 15 is designed with wide impedance compatibility, supporting speakers between 4 and 16 ohms. This makes it versatile enough to pair with a variety of vintage and contemporary speaker systems.
The direct-coupled design removes capacitors from the signal path, which allows for faster transient response and immediate recovery from overloads. This ensures the amplifier maintains consistent power and clarity across the entire frequency spectrum.
Yes, it is equipped with a built-in protection circuit designed to safeguard the amplifier and your speakers. This adds a layer of reliability, which is particularly important for a vintage piece of this caliber.
As Marantz's first solid-state amplifier, the Model 15 is celebrated for its rich, detailed sound and impressive clarity. While it offers the precision of solid-state engineering, it retains a classic, musical warmth that many audiophiles find lacking in more clinical, modern designs.
The unit measures 15 ⅜ x 8 x 5 ¾ inches and weighs 34 pounds. Given its weight and the heat generated by vintage power amplifiers, you should ensure it is placed on a sturdy, well-ventilated surface in your home audio setup.
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