Buy the Onkyo TX-RZ50 — for the same Dirac Live foundation you get 120W vs a curated 100W and eleven processing channels vs nine, so a future external amp expands the system instead of replacing the hub. The TX-NR7100 is the right buy only at a meaningful discount with a firm 9-channel ceiling.
Shaded rows differ · green dot = lab-measured · amber = manufacturer-verified · blue = retailer/community-reported · grey = estimated · “not stated” means exactly that
Reading the numbers honestly
The RZ50 states 120W at 8Ω, two channels driven, 0.08% THD (it also publishes a generous 250W-into-6Ω line — our data keeps both with their contexts, and the 120 is the honest one to compare); the NR7100's curated figure is 100W into 8Ω. The RZ50 processes eleven channels to the NR7100's nine — meaning a future external amp expands the system instead of replacing it. Both state 4–16Ω ratings, IMAX Enhanced, and zone 3.
Compatibility · computed, not written
Checked against a bookshelf that dips to a stated 3.5Ω like the KEF LS50 Meta: KEF LS50 Meta
Can the Onkyo TX-RZ50 drive the KEF LS50 Meta?
Onkyo TX-RZ50 states a 4Ω-minimum rating; the KEF LS50 Meta dips to a stated 3.5Ω minimum, a little below that floor. Most receivers handle a marginal dip at normal volumes — it's worth watching only at very high output on an entry-level unit.
Can the Onkyo TX-NR7100 drive the KEF LS50 Meta?
Onkyo TX-NR7100 states a 4Ω-minimum rating; the KEF LS50 Meta dips to a stated 3.5Ω minimum, a little below that floor. Most receivers handle a marginal dip at normal volumes — it's worth watching only at very high output on an entry-level unit.
Computed from the catalog's normalized fields — the same fields the builder's compatibility engine reads. A missing field reads as "can't check", never as a pass.
Buy the Onkyo TX-RZ50 — for the same Dirac Live foundation you get 120W vs a curated 100W and eleven processing channels vs nine, so a future external amp expands the system instead of replacing the hub. The TX-NR7100 is the right buy only at a meaningful discount with a firm 9-channel ceiling.
The RZ50 publishes DUAL power contexts — 120W (8Ω/2ch/0.08% THD) and 250W (6Ω) — and our data stores both with their conditions; the like-for-like line against the NR7100's curated 100W is 120, not 250.
11 vs 9 processing channels on the same Dirac Live platform — stated, and the whole expansion story.
Badge parity, stated: THX Certified Select, IMAX Enhanced, 4–16Ω ratings, and zone 3 on both.
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