Krell S-300i 150W USA Made Integrated Amplifier Balanced XLR Inputs with Remote Fully Discrete Class A Preamp

The Krell S-300i is one of the most compelling integrated amplifiers Krell ever produced, delivering much of the brand’s legendary power and control in a compact, affordable package. Rated at 150W per channel into 8Ω and 300W into 4Ω, it possesses the current delivery and speaker-driving authority typically associated with far more expensive separates. Unlike many integrated amplifiers that struggle with demanding loads, the S-300i remains composed and effortless, exhibiting the classic Krell traits of grip, control, and dynamic confidence.

Sonically, the S-300i prioritizes precision over romance. Its presentation is fast, clean, and highly resolved, with exceptional transient speed and image focus. The amplifier excels at uncovering low-level detail, revealing subtle textures, instrumental timbres, and spatial cues with remarkable clarity. Acoustic instruments sound natural and well defined, while vocals are reproduced with excellent articulation and presence. The tonal balance leans slightly toward the neutral and analytical side rather than lush or euphonic, making it particularly attractive to listeners who value accuracy, transparency, and control.

Bass performance is another standout characteristic. While it may not deliver the sheer scale and subterranean weight of Krell’s flagship separates, it offers outstanding low-frequency control, pitch definition, and authority. The fully balanced Class A preamp stage, Current Mode circuitry derived from Krell’s Evolution series, substantial 750VA toroidal transformer, and 38,000μF power supply capacitance contribute to a sound that feels powerful, composed, and highly engaging. Combined with excellent build quality, comprehensive connectivity, and home-theater integration features, the S-300i remains one of the best-value Krell amplifiers ever made and a highly desirable choice on the used market.

Specifications

• Power Output: 150W/ch into 8Ω, 300W/ch into 4Ω
• Preamplifier: Fully balanced discrete Class A
• Volume Control: R-2R resistor ladder
• Inputs: 3 × RCA, 1 × XLR balanced
• Transformer: 750VA toroidal
• Power Supply Capacitance: 38,000μF
• Dimensions: 17.25″ × 4.2″ × 17.5″
• Weight: 43 lbs (19.5 kg)
• Additional Features: Home theater bypass, RS232, trigger input/output, iPod interface, input naming and trim adjustments

Audiophile Verdict: The S-300i is classic Krell distilled into an integrated amplifier—powerful, highly controlled, detailed, and capable of driving virtually any loudspeaker with confidence. It sacrifices a touch of warmth and ultimate soundstage scale compared to far costlier amplifiers, but at its price point it delivers exceptional performance and remains one of the strongest values in high-end integrated amplification.