SP-8 – Natural and effortlessly open midrange with a touch of warmth. Bass is slightly soft, and the treble, while detailed, has a hint of veil. Vocals and leading instruments are well-presented with nice separation. The soundstage is impressively deep, though it doesn’t “disappear” as seamlessly as some peers in its class. Stage width is excellent, but the center image is a bit diffuse. Overall, an engaging and non-fatiguing listen with a charmingly vintage character.
QC50 – Excellent imaging and soundstage for its price point. Smooth, well-balanced midrange with punchy, dynamic, and clean bass that extends into the low 40Hz range. Female vocals sound accurate with natural timbre, and the treble is slightly relaxed but refined.
Overall, both are very good speakers in this price point but, imho, the main differences lie in (1) the SP-8 delivers a vintage, organic sound with warmer, softer bass and a relaxed top end, while the QC50 has a more modern, articulate character with tighter, faster bass response. (2) Both offer excellent soundstage width and depth, but the QC50 excels in center imaging precision.
SP-8’s “vintage” character likely comes from BBC-tuned voicing, i.e., smooth, midrange-focused, and fatigue-free. The imaging vagueness isn’t a flaw per se; it’s part of the design tradeoff to achieve openness and effortless. The choice is also heavily dependent on your personal taste and preferences. If possible, it’s highly recommended to audition both speakers at home for an extended period before making an informed decision.
