"This integrated amplifier is little more than four inches high, but this powerhouse is pure Krell through and through."
"In sonic personality the S-300i could very well be the Lance Armstrong of integrated amplification. Like the physique of the Tour de France champ, the S-300i’s sonics are conveyed with muscular definition and not a single ounce of flab. Its sound is built for speed and for the critical analysis of a recording—not a rough translation. The result is a drier tonality that’s not exactly sweet but rather sweetly exacting. If your biases tend toward the lush, florid, romantic, or, goodness knows, euphonic, the S-300i may not entirely win your heart. However, if it’s precision-cut images and transient acceleration you’re seeking, you’ve found your ride."
- Neil Gader, The Absolute Sound magazine, June 23, 2009
"The biggest asset of the new integrated -- better than anything I've heard for its money regardless of technology -- was the soundstage… Everything between the loudspeakers was filled with a 'fluid', with very well localized positions of the musicians, nice acoustics and good layers even at the back of the stage. But this wasn't all. Listening to Depeche Mode, then Kate Bush and finally the brilliant Lars Daniellsson album Mélange Bleu, I could not believe how well this device handled depth not just behind but also in front of the loudspeakers - and behind the listener. These albums include out-of-phase data and the sounds are located all around the listener. The Krell showed them all without exaggeration…"
- Wojciech Pacula, 6moons.com
"A great-sounding, reasonably priced analog two-channel integrated amp from a high-end brand that many people thought they would never be able to afford - and it's got an iPod interface, too."
"Exceptionally clear and vivid stereo music reproduction."
"For those who desire such lofty goods but never imagined they'd be able to afford anything wearing the Krell brand, the S-300i will come as a surprise and a delight.
- Brent Butterworth, Sound&Vision magazine, February 3, 2009
"Taking everything into account: huge power, good load drive, technical accuracy, an intelligent iPod control interface, confidence inspiring build and finish, the channel balance and source volume offset facility, plus the precision volume control, it is well on the way to recommendation. I consider it can operate comfortably as part of complete hi-fi systems costing up to £15,000."
"Add in class leading sound quality (for power and price), with a focused, muscular delivery, good clarity and image depth plus tonal neutrality, good dynamics, above average rhythm and timing, plus a stunning dynamic range, and this is a thoroughly recommendable, all purpose design. Even the handset is top quality."
- HiFiCritic, EnjoyTheMusic.com, Volume 3, Number 4