PMC twenty5.21i
Loudspeakers
Relative price
typical
Among the 26 loudspeakerss in the catalogue, this one is typical.
A band places a component against its peers and carries no price. It is deliberately the only price indicator on this page: a second one, measured against a different set, would narrow the two together far enough to give the figure away.
What it is
Voicing — Hi-Fi+ Wright: "generating the scale and sonic weight of notably larger boxes" via ATL physics. The-Ear Smith on the larger 22i: "in the past PMCs have had a brighter than average balance... with the latest models, including the fact.12 Signature, this seems to have changed, they have become more sophisticated." Voicing camp: balanced/reference, monitor-leaning.
CAVITY FIT: 340mm H exceeds 324mm cavity max by 16mm — DOES NOT FIT the speaker cavity used in this build. Front-firing Laminair vent would otherwise be placement-tolerant (no rear airflow demand), but the height alone disqualifies it. Catalogued for §9 reference; NOT entered into system competition.
CAVITY HEIGHT INELIGIBLE (normalised flag 2026-05-12 per constraint audit): height violation already documented in the CAVITY FIT note above; this added note carries the standard "INELIGIBLE" keyword so eligibility_filter.py and §7-reference filtering can match consistently across Wharfedale/Graham/PMC entries.
What the reviewers said
tight-as-a-drum timing Hi-Fi+ Jason Kennedy review· Timing precision
strong tonal discernment and subtlety Hi-Fi+ Jason Kennedy review· Tonal body
uncommonly well controlled by line loading Hi-Fi+ Jason Kennedy review· Bass control
generating scale and sonic weight of larger boxes Hi-Fi+ + multi-source review consensus· Physical impact
transparency and low distortion Hi-Fi+ Jason Kennedy review· Harmonic texture
low volume performance is where they really shine AVForums owner consensus· Micro-dynamic resolution
86.5dB sensitivity, not very efficient The Audiophile Man (Paul Rigby)· Tonal body
How it scores
Voice
- Tonal body 73 from listening evidence
- Harmonic texture 74 from listening evidence
Bass
- Bass control 78 from listening evidence
- Physical impact 74 from listening evidence
LowerVolume
- Micro-dynamic resolution 73 from listening evidence
Specifications
| speaker type | standmount |
|---|---|
| enclosure type | transmission line (front Laminair vent) |
| way count | 2 |
| drivers | 1× 19mm SONOMEX soft-dome tweeter with 34mm surround (SEAS-developed); 1× 140mm long-throw G-weave bass/mid |
| crossover hz | 1700 |
| sensitivity db | 86.5 |
| nominal impedance ohm | 8.0 |
| minimum impedance ohm | 4.0 |
| recommended amp w | 30/150 |
| frequency response hz | 46/25000 |
| dimensions mm | 162/340/284 |
| weight kg | 6.0 |
| stand required | True |
| notes |