PS Audio Stellar M1200 Monoblock Amplifier
Best high fidelity amplification for discerning audiophiles.
Experience exceptional audio with this powerful monoblock amplifier. It delivers a rich, warm, and engaging sonic character, combining the slam of Class D with the warmth of Class A. Its dual mono design ensures independent power for each channel, providing robust control over demanding loudspeakers. Perfect for audiophiles seeking a powerful yet refined listening experience, this amplifier integrates seamlessly into any high-fidelity system, offering impressive power and clarity. It's designed to drive even the most challenging speakers with authority and grace.
$1399.00
Owner Satisfaction
4.7
/ 5
Category Rank
581
/ 2758
#581 in Power Amplifiers
Price vs Category Average
-85%
Below average
Unit Weight
13
/ lbs
Who it's for
- Audiophiles with power-hungry speakers or large listening spaces
- Listeners seeking both tube musicality and solid-state power and efficiency
- Critical listeners prioritizing immersive imaging and micro-detail retrieval
Who should skip it
- Budget-conscious audiophiles or those new to high-end audio
- Users with limited rack space or those preferring simpler system setups
- Pragmatic users who prefer maintenance-free solid-state reliability
Performance breakdown
Power Delivery
Effortlessly drives demanding loudspeakers with massive high-current headroom.
Sonic Character
Expertly blends Class D authority with the lush warmth of tubes.
Channel Isolation
Dual mono architecture ensures pristine separation and a wide soundstage.
Control Authority
High damping factor keeps bass response tight and exceptionally well-defined.
Build Efficiency
Compact footprint delivers serious power without dominating your equipment rack.
Signal Purity
Zero feedback design preserves the natural texture of your favorite recordings.
Key Specs
Unit Weight
13 lbs
Dimensions
17”W x 3”H x 12”D
Amplifier Class
Class D and Class A
Channels
2
Output Power
140W per channel into 8Ω, 300W per channel into 4Ω
Input Impedance
Unbalanced 50KΩ, Balanced 100KΩ
Damping Factor
> 550
Frequency Response
10Hz – 20KHz +/- 0.5dB, 10Hz – 50KHz +0.1/-3.0dB
Know before you buy
The hybrid design combines a Class A MOSFET input stage with a Class D output stage. This gives you the rich, warm, and musical character of traditional analog amplification alongside the high-current efficiency and power of Class D.
With 140 watts into 8Ω and 300 watts into 4Ω, the S300 has significant headroom for most speakers. Its high damping factor of over 550 ensures it maintains tight, authoritative control over your woofers, even during complex musical passages.
No, it runs very efficiently. Because the output stage utilizes Class D technology, the unit generates minimal heat compared to pure Class A designs, making it easier to place in enclosed cabinets or racks.
Yes, the S300 features both RCA (unbalanced) and XLR (balanced) inputs. Using the balanced XLR inputs is recommended if your preamplifier supports them, as it can help reduce noise and interference in your signal chain.
The amplifier measures 17 inches wide, 3 inches high, and 12 inches deep. Its slim profile makes it easy to integrate into most standard audio racks without requiring excessive vertical clearance.
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