Short answer: the JTR Speakers Captivator 1400. It ranks #28 of 110 subwoofers by sound quality at $2495; the BK Electronics Monolith-DF ranks #107 and costs $8995, which makes this an easy call rather than a real tradeoff.
What the JTR Speakers Captivator 1400 offers: Independent CEA-2010 testing records 116.1 dB at 20 Hz and 125.2 dB through 40-80 Hz. The ported, front enclosure with 18” (457mm) driver has the headroom for demanding film bass in a large room. Watch for: The 508.0H x 762.0W x 571.5D mm cabinet and 64.4 kg mass make this a serious placement and moving commitment. Ported output does not solve room modes, so careful placement and calibration remain essential.
What the BK Electronics Monolith-DF offers: Independent CEA-2010 testing records 102.0 dB at 20 Hz and 108.4 dB through 40-80 Hz. The ported, bottom enclosure with 12” (305mm) driver with ported design delivers substantial upper-bass output for movie effects and music. Watch for: Deep-bass output is more limited than the strong 40-80 Hz result suggests, so it is not the right choice when the lowest movie effects are the priority. The 603.8H x 539.8W x 419.9D mm cabinet and 46.8 kg mass still require deliberate placement and calibration.
Buy the JTR Speakers Captivator 1400. It ranks higher for sound quality than the BK Electronics Monolith-DF and costs less, so there is no real case for the other one.
The BK Electronics Monolith-DF is not a sound-quality pick. It sits near the bottom of the 110 subwoofers; there are better options higher up.
Want more options? Browse the full Subwoofers rankings.
Specifications Side By Side
| JTR Speakers Captivator 1400 | BK Electronics Monolith-DF | |
|---|---|---|
| Price | $2495 | $8995 |
| Ranked | #28 of 110 in Large Home Subwoofers (Over 75 lbs) | #107 of 110 in Large Home Subwoofers (Over 75 lbs) |
| Enclosure | ported, front | ported, bottom |
| Output SPL at 12.5 Hz | 99.3 dB | - |
| Output SPL at 15 Hz | 111.9 dB | 91.3 dB |
| Output SPL at 20 Hz | 116.1 dB | 102.0 dB |
| Output SPL at 25 Hz | 119.2 dB | 106.4 dB |
| Output SPL at 31.5 Hz | 121.7 dB | 108.3 dB |
| Output SPL at 40 Hz | 124.8 dB | 108.6 dB |
| Output SPL at 50 Hz | 126.4 dB | 108.7 dB |
| Output SPL at 63 Hz | 125.4 dB | 108.6 dB |
| Output SPL at 80 Hz | 124.0 dB | 107.7 dB |
| Output SPL at 100 Hz | 126.0 dB | - |
| Output SPL at 125 Hz | 124.7 dB | - |
| CEA-2010-A Average (40-80Hz) | 125.2 dB | 108.4 dB |
| Dimensions | 20"H x 30"W x 22.5"D (508.0 x 762.0 x 571.5 mm) | 23.8"H x 21.3"W x 16.5"D (603.8 x 539.8 x 419.9 mm) |
| Weight | 142 lbs (64.4 kg) | 103.2 lbs (46.8 kg) |
| Warranty | 5/3 | 2 |
| Country | United States | United Kingdom |
| Measurement Source | Data-bass | Ilkka Rissanen |
| Drivers | 18" (457mm) driver | 12" (305mm) driver with ported design |
| Cabinet Color | - | black, wood |
Related Speaker Comparisons
How JTR Speakers Captivator 1400 compares with other leading options:
- JTR Speakers Captivator S2 vs JTR Speakers Captivator 1400
- JTR Speakers Captivator 1400 vs Funk Audio Ultra 24.0
- JTR Speakers Captivator 1400 vs JTR Speakers Growler (2015)
- JTR Speakers Captivator 1400 vs Harbinger V2218S
- JTR Speakers Captivator 1400 vs Funk Audio Classic 18.0
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The Two Speakers In Full
JTR Speakers Captivator 1400: $2495 eBay
Pros: Independent CEA-2010 testing records 116.1 dB at 20 Hz and 125.2 dB through 40-80 Hz. The ported, front enclosure with 18” (457mm) driver has the headroom for demanding film bass in a large room.
Cons: The 508.0H x 762.0W x 571.5D mm cabinet and 64.4 kg mass make this a serious placement and moving commitment. Ported output does not solve room modes, so careful placement and calibration remain essential.
Full JTR Speakers Captivator 1400 review and specifications →
| CEA-2010-A Average (40-80Hz) | 125.2 dB |
|---|---|
| Country | United States |
| Dimensions | 20"H x 30"W x 22.5"D (508.0 x 762.0 x 571.5 mm) |
| Drivers | 18" (457mm) driver |
| Enclosure | ported, front |
| Measurement Source | Data-bass |
| Output SPL at 12.5 Hz | 99.3 dB |
| Output SPL at 15 Hz | 111.9 dB |
| Output SPL at 20 Hz | 116.1 dB |
| Output SPL at 25 Hz | 119.2 dB |
| Output SPL at 31.5 Hz | 121.7 dB |
| Output SPL at 40 Hz | 124.8 dB |
| Output SPL at 50 Hz | 126.4 dB |
| Output SPL at 63 Hz | 125.4 dB |
| Output SPL at 80 Hz | 124.0 dB |
| Output SPL at 100 Hz | 126.0 dB |
| Output SPL at 125 Hz | 124.7 dB |
| Warranty | 5/3 |
| Weight | 142 lbs (64.4 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by Data-bass; the published figures above come from this ASR subwoofer measurement thread.
- Head-to-Head Comparisons
- JTR Speakers Captivator 1400 vs Power Sound Audio (PSA) S3600i
- JTR Speakers Captivator 1400 vs Monoprice Monolith M-215
- JTR Speakers Captivator 1400 vs Rythmik FV25HP
- JTR Speakers Captivator 1400 vs Monoprice Monolith 16 THX Ultra
- JTR Speakers Captivator 1400 vs Funk Audio Classic 18.0
- JTR Speakers Captivator 1400 vs Harbinger V2218S
- JTR Speakers Captivator 1400 vs JTR Speakers Growler (2015)
- JTR Speakers Captivator 1400 vs Funk Audio Ultra 24.0
- See all 16 comparisons
BK Electronics Monolith-DF: $8995 eBay
Pros: Independent CEA-2010 testing records 102.0 dB at 20 Hz and 108.4 dB through 40-80 Hz. The ported, bottom enclosure with 12” (305mm) driver with ported design delivers substantial upper-bass output for movie effects and music.
Cons: Deep-bass output is more limited than the strong 40-80 Hz result suggests, so it is not the right choice when the lowest movie effects are the priority. The 603.8H x 539.8W x 419.9D mm cabinet and 46.8 kg mass still require deliberate placement and calibration.
Full BK Electronics Monolith-DF review and specifications →
| CEA-2010-A Average (40-80Hz) | 108.4 dB |
|---|---|
| Cabinet Color | black, wood |
| Country | United Kingdom |
| Dimensions | 23.8"H x 21.3"W x 16.5"D (603.8 x 539.8 x 419.9 mm) |
| Drivers | 12" (305mm) driver with ported design |
| Enclosure | ported, bottom |
| Measurement Source | Ilkka Rissanen |
| Output SPL at 15 Hz | 91.3 dB |
| Output SPL at 20 Hz | 102.0 dB |
| Output SPL at 25 Hz | 106.4 dB |
| Output SPL at 31.5 Hz | 108.3 dB |
| Output SPL at 40 Hz | 108.6 dB |
| Output SPL at 50 Hz | 108.7 dB |
| Output SPL at 63 Hz | 108.6 dB |
| Output SPL at 80 Hz | 107.7 dB |
| Warranty | 2 |
| Weight | 103.2 lbs (46.8 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by Ilkka Rissanen; the published figures above come from this ASR subwoofer measurement thread.
- Head-to-Head Comparisons
- BK Electronics Monolith-DF vs SVS SB13-Plus
- BK Electronics Monolith-DF vs Genelec HTS4B
- BK Electronics Monolith-DF vs RSL (Rogersound Labs) Speedwoofer 12S
- BK Electronics Monolith-DF vs HSU Research VTF-3 MK3
- BK Electronics Monolith-DF vs Rythmik F18
- BK Electronics Monolith-DF vs SVS PB-4000
- BK Electronics Monolith-DF vs HSU Research VTF-3 MK5 HP
- BK Electronics Monolith-DF vs Rythmik FV15HP
- See all 16 comparisons