Short answer: the HSU Research VTF-3 MK5 HP. It ranks #52 of 110 subwoofers by sound quality at $1049; the Harbottle Audio C24 L1 ranks #54 and costs $6244.50, which makes this an easy call rather than a real tradeoff.
What the HSU Research VTF-3 MK5 HP offers: Ported cabinet delivers 121.4dB CEA-2010-A average, one of the best price-to-output ratios in this weight class. Watch for: Ported design requires careful room placement, mid-size 39 kg cabinet, and mid-range output.
What the Harbottle Audio C24 L1 offers: Published CEA-2010 specifications list 114.0 dB at 20 Hz and 121.3 dB through 40-80 Hz. The ported enclosure with 24” (610mm) driver has the headroom for demanding film bass in a large room. Watch for: The 899.9H x 722.1W x 512.1D mm cabinet and 63.0 kg mass make this a serious placement and moving commitment. Ported output does not solve room modes, so careful placement and calibration remain essential.
Buy the HSU Research VTF-3 MK5 HP. It ranks higher for sound quality than the Harbottle Audio C24 L1 and costs less, so the other one has nothing left to offer.
Still deciding? The full Subwoofers rankings cover every ranked option.
Specifications Side By Side
| HSU Research VTF-3 MK5 HP | Harbottle Audio C24 L1 | |
|---|---|---|
| Price | $1,099 | $6,244.50 |
| Ranked | #52 of 110 in Large Home Subwoofers (Over 75 lbs) | #54 of 110 in Large Home Subwoofers (Over 75 lbs) |
| Enclosure | ported, front | ported |
| Output SPL at 15 Hz | 100.8 dB | 106.0 dB |
| Output SPL at 20 Hz | 108.2 dB | 114.0 dB |
| Output SPL at 25 Hz | 113.4 dB | 116.0 dB |
| Output SPL at 31.5 Hz | 118.2 dB | 121.0 dB |
| Output SPL at 40 Hz | 121.9 dB | 121.1 dB |
| Output SPL at 50 Hz | 122.3 dB | 121.6 dB |
| Output SPL at 63 Hz | 121.1 dB | 121.6 dB |
| Output SPL at 80 Hz | 120.4 dB | 121.0 dB |
| CEA-2010-A Average (40-80Hz) | 121.4 dB | 121.3 dB |
| Dimensions | 25"H x 17.2"W x 24"D (635.0 x 438.1 x 609.6 mm) | 35.4"H x 28.4"W x 20.2"D (899.9 x 722.1 x 512.1 mm) |
| Weight | 85.1 lbs (38.6 kg) | 138.9 lbs (63.0 kg) |
| Warranty | 7/2(+3) | - |
| Cabinet Color | black | black, white, red, blue |
| Country | United States | Canada |
| Measurement Source | Manufacturer | Manufacturer |
| Drivers | 15" (381mm) driver | 24" (610mm) driver |
| Output SPL at 10 Hz | - | 94.0 dB |
| Output SPL at 12.5 Hz | - | 99.0 dB |
| Output SPL at 100 Hz | - | 121.0 dB |
Related Speaker Comparisons
More worthwhile head-to-heads for HSU Research VTF-3 MK5 HP:
- HSU Research VTF-3 MK5 HP vs JTR Speakers Orbit Shifter PRO
- HSU Research VTF-3 MK5 HP vs JTR Speakers Orbit Shifter LFU
- HSU Research VTF-3 MK5 HP vs WW Speaker Cabinets X21 - B&C 21DS115-4
- HSU Research VTF-3 MK5 HP vs Pro Audio Technology LFC-24sm
- HSU Research VTF-3 MK5 HP vs Power Sound Audio (PSA) TRIAX
Prices on this page were last checked September 16, 2026 at 12:41 AM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
As an eBay Partner, we may be compensated if you make a purchase.
The Two Speakers In Full
HSU Research VTF-3 MK5 HP: $1,099 HSU Research eBay
Pros: Ported cabinet delivers 121.4dB CEA-2010-A average, one of the best price-to-output ratios in this weight class.
Cons: Ported design requires careful room placement, mid-size 39 kg cabinet, and mid-range output.
Notes: Price includes shipping
Full HSU Research VTF-3 MK5 HP review and specifications →
| CEA-2010-A Average (40-80Hz) | 121.4 dB |
|---|---|
| Cabinet Color | black |
| Country | United States |
| Dimensions | 25"H x 17.2"W x 24"D (635.0 x 438.1 x 609.6 mm) |
| Drivers | 15" (381mm) driver |
| Enclosure | ported, front |
| Measurement Source | Manufacturer |
| Output SPL at 15 Hz | 100.8 dB |
| Output SPL at 20 Hz | 108.2 dB |
| Output SPL at 25 Hz | 113.4 dB |
| Output SPL at 31.5 Hz | 118.2 dB |
| Output SPL at 40 Hz | 121.9 dB |
| Output SPL at 50 Hz | 122.3 dB |
| Output SPL at 63 Hz | 121.1 dB |
| Output SPL at 80 Hz | 120.4 dB |
| Warranty | 7/2(+3) |
| Weight | 85.1 lbs (38.6 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- These figures are manufacturer-specified rather than independently measured.
- Head-to-Head Comparisons
- HSU Research VTF-3 MK5 HP vs Rythmik FV18
- HSU Research VTF-3 MK5 HP vs SVS PB-3000
- HSU Research VTF-3 MK5 HP vs HSU Research VTF-15H MK2
- HSU Research VTF-3 MK5 HP vs JTR Speakers Captivator RS1
- HSU Research VTF-3 MK5 HP vs Rythmik FV15HP
- HSU Research VTF-3 MK5 HP vs Monoprice Monolith 13 THX Ultra
- HSU Research VTF-3 MK5 HP vs Arendal 1723 Subwoofer 2V
- HSU Research VTF-3 MK5 HP vs SVS PB-4000
- See all 54 comparisons
Harbottle Audio C24 L1: $6,244.50 eBay
Pros: Published CEA-2010 specifications list 114.0 dB at 20 Hz and 121.3 dB through 40-80 Hz. The ported enclosure with 24” (610mm) driver has the headroom for demanding film bass in a large room.
Cons: The 899.9H x 722.1W x 512.1D mm cabinet and 63.0 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 Harbottle Audio C24 L1 review and specifications →
| CEA-2010-A Average (40-80Hz) | 121.3 dB |
|---|---|
| Cabinet Color | black, white, red, blue |
| Country | Canada |
| Dimensions | 35.4"H x 28.4"W x 20.2"D (899.9 x 722.1 x 512.1 mm) |
| Drivers | 24" (610mm) driver |
| Enclosure | ported |
| Measurement Source | Manufacturer |
| Output SPL at 10 Hz | 94.0 dB |
| Output SPL at 12.5 Hz | 99.0 dB |
| Output SPL at 15 Hz | 106.0 dB |
| Output SPL at 20 Hz | 114.0 dB |
| Output SPL at 25 Hz | 116.0 dB |
| Output SPL at 31.5 Hz | 121.0 dB |
| Output SPL at 40 Hz | 121.1 dB |
| Output SPL at 50 Hz | 121.6 dB |
| Output SPL at 63 Hz | 121.6 dB |
| Output SPL at 80 Hz | 121.0 dB |
| Output SPL at 100 Hz | 121.0 dB |
| Weight | 138.9 lbs (63.0 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- These figures are manufacturer-specified rather than independently measured.
- Head-to-Head Comparisons