Monophonic listening is the most demanding test of loudspeaker sound quality

Evidence

In summary, while it is undeniable that good stereo and multichannel recordings are more entertaining than monophonic versions, it is an inconvenient truth that monophonic listening provides circumstances in which the strongest perceptual differentiation of sound quality occurs. If the purpose of a listening test is to evaluate the intrinsic sound quality from loudspeakers, listen in mono. For pleasure, or to impress someone, listen in stereo or multichannel modes. — , Toole, Floyd E - Sound reproduction-…, 236 (#corroborates, via linked claim)

In monophonic tests listeners reported large differences in both sound quality and spatial quality. However, in stereo listening most of the differences disappeared in the average ratings for all programs. The two highly rated loudspeakers kept their high sound quality ratings, but the loudspeaker with low ratings in mono became competitive in stereo. — Toole, Floyd E, Sound reproduction- the acoustics and…, 443 (#expands, via linked claim)

Categorization

• XREF: connects to: Mono listening produces stronger and more consistent loudspeaker quality opinions than stereo — , Toole, Floyd E - Sound reproduction-…, 236; Stereo presentation masks audible differences between loudspeakers found in mono. — Toole, Floyd E, Sound reproduction- the acoustics and…, 443; Loudspeaker evaluation must be done in mono because multichannel adds forgiveness (+1 more)

Related

• Mono listening produces stronger and more consistent loudspeaker quality opinions than stereo (similarity 0.96)
• Loudspeaker evaluation must be done in mono because multichannel adds forgiveness (similarity 0.95)
• Every channel in a multichannel setup must perform well as a solo monophonic source (similarity 0.94)
• Stereo and multichannel listening make listeners more forgiving of loudspeaker flaws (similarity 0.91)
• Loudspeaker evaluation requires mono, while enjoyment happens in multichannel (similarity 0.90)
• Stereo presentation masks audible differences between loudspeakers found in mono. (similarity 0.89)
• Critical loudspeaker evaluation should use mono for fail-safe real-world listening (similarity 0.87)
• Stereo playback masks differences between loudspeakers with room reflections (similarity 0.85)
• Blind listener tests reliably favor the most neutral loudspeakers (similarity 0.84)
• Spatial richness in multichannel sound inhibits perception of loudspeaker resonances (similarity 0.84)
• Mismatched left-right speakers may degrade stereo imaging more than room effects. (similarity 0.84)
• Louder playback is unconsciously rated as better quality in audio listening tests (similarity 0.83)
• Most listeners can recognize audio excellence when comparing loudspeakers side by side. (similarity 0.83)
• Even professional monitor loudspeakers showed measurable defects in early tests (similarity 0.83)
• Multichannel spatial information masks loudspeaker coloration in playback (similarity 0.83)

Broader Connections

• Mono listening produces stronger and more consistent loudspeaker quality opinions than stereo #corroborates (0.95) — , Toole, Floyd E - Sound reproduction-…, 236
• Stereo presentation masks audible differences between loudspeakers found in mono. #expands (0.90) — Toole, Floyd E, Sound reproduction- the acoustics and…, 443
• Loudspeaker evaluation must be done in mono because multichannel adds forgiveness #corroborates (0.90)