Subwoofer
below typical
Among the 24 subwoofers in the catalogue, this one is below 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.
UK forum consensus (Overclockers UK, AVForums) treats XXLS400 as the "best all-rounder for music" in BK lineup — better dynamic envelope than XLS200, more music-suited tonal balance than P12-300SB or Monolith+ which are more movies-leaning.
MK3 generation (current 2024-2026) features refined amp electronics and driver upgrade vs MK2.
Class A/B amplification consistent with BK brand DNA (value-tier UK manufacturing with warm-leaning amp character).
Assessed against 2 rivals across the sixty systems: it takes the slot in none of its 14 head-to-heads.
12 lost · Anchored, BBC Sound, Cavity-Native, Characterful, Intimate, PRaT, Reference, Silent Path, Twin Arms
A subwoofer here is chosen by coverage arithmetic, not by pairing character — the swap saves about 67% of this position’s spend without changing what the system reaches down to.
2 lost · Artisan, BBC Sound
A subwoofer here is chosen by coverage arithmetic, not by pairing character — the swap saves about 50% of this position’s spend without changing what the system reaches down to.
BK XXLS400 12-inch sealed sub BK Electronics XXLS400-DF MK3· Bass extension
taut precision and almost no overhang TechRadar 2014 (orig XXLS400DF)· Bass control
even deeper TechRadar 2014 (orig XXLS400DF)· Bass extension
| powered | True |
|---|---|
| driver size mm | 305.0 |
| enclosure type | sealed |
| amp power w | 400.0 |
| line input | True |
| speaker input | True |
| crossover capability | low_pass_only |
| crossover range hz | 30/140 |
| phase adjust | 0/180 switch |
| frequency response hz | 18/200 |
| dimensions mm | 430/480/470 |
| weight kg | 28.0 |
| notes |