Short answer: pick the Rythmik F12 if you want sound quality that has been measured and ranked; the REL Acoustics T/7x is unmeasured so far, so its case rests on features and price.
The case for the REL Acoustics T/7x: Sealed subwoofer with a front-firing 8-inch driver and a down-firing 10-inch passive radiator, driven by a 200W Class A/B amplifier.
On the Rythmik F12 side: Sealed 12-inch servo with 370W RMS offers excellent value.
On paper: The Rythmik F12 is rated down to 14Hz against 30Hz, though makers quote these at different tolerances. The Rythmik F12 has more amplifier power, 370W against 200W.
Price: the REL Acoustics T/7x lists at $1,299 and the Rythmik F12 at $1,439.
Buy the Rythmik F12 if you want a speaker whose sound quality has been measured and ranked. It also has deeper rated bass and more power.
Buy the REL Acoustics T/7x if you prefer its design or features, and you can wait for measurements to confirm how it sounds.
Still deciding? The full Subwoofers rankings cover every ranked option.
Specifications Side By Side
| REL Acoustics T/7x | Rythmik F12 | |
|---|---|---|
| Price | $1,299.00 | $1,439 |
| Ranked | - | #20 of 145 in Medium Home Subwoofers (30-75 lbs) |
| Enclosure | sealed, passive radiator | sealed |
| Drivers | 8” driver + 10” passive radiator | 12” (305mm) driver |
| Amplifier Power | 200W (Class A/B) | 370W RMS |
| Frequency Response | 30Hz (-6dB) (Manufacturer specified) | 14Hz extension |
| Country | United Kingdom | United States |
| Output SPL at 20 Hz | - | 103.6 dB |
| Output SPL at 25 Hz | - | 106.7 dB |
| Output SPL at 31.5 Hz | - | 113.5 dB |
| Output SPL at 40 Hz | - | 118.3 dB |
| Output SPL at 50 Hz | - | 119.1 dB |
| Output SPL at 63 Hz | - | 120.4 dB |
| Output SPL at 80 Hz | - | 119.6 dB |
| CEA-2010-A Average (40-80Hz) | - | 119.3 dB |
| Dimensions | - | 15.7”H x 15.7”W x 17”D (400.0 x 400.0 x 431.8 mm) |
| Weight | - | 75 lbs (34.0 kg) |
| Warranty | - | 5/3 |
| Cabinet Color | - | black |
| Measurement Source | - | Brent Butterworth |
| Output SPL at 16 Hz | - | 101.0 dB |
| Inputs | - | XLR (2), RCA (line/LFE) |
| XLR Input | - | Yes |
| RCA Input | - | Yes |
| TRS Input | - | No |
| Optical Input | - | No |
| Coaxial Input | - | No |
| USB Input | - | No |
| HDMI Input | - | No |
| AES Input | - | No |
| Aux Input | - | No |
Prices on this page were last checked September 29, 2026 at 3:43 PM 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.
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The Two Speakers In Full
REL Acoustics T/7x: $1,299.00 Amazon eBay
Older model: the REL Acoustics T-7 (rated 3.6/5).
Pros: Sealed subwoofer with a front-firing 8-inch driver and a down-firing 10-inch passive radiator, driven by a 200W Class A/B amplifier. REL rates extension to 30Hz at -6dB. A high-level speaker-wire input and an RCA/LFE input can be connected at the same time for music and movies.
Cons: No independent measurements yet, so its output can’t be compared with ranked subwoofers. There is no app, EQ or room correction, and an 8-inch driver limits output in a large room.
Full REL Acoustics T/7x review and specifications →
| Amplifier Power | 200W (Class A/B) |
|---|---|
| Country | United Kingdom |
| Drivers | 8” driver + 10” passive radiator |
| Enclosure | sealed, passive radiator |
| Frequency Response | 30Hz (-6dB) (Manufacturer specified) |
- Links
- Reviews, Comparisons and Sound Samples
- These figures are manufacturer-specified rather than independently measured.
- Head-to-Head Comparisons
Rythmik F12: $1,439 Rythmik Audio eBay
Pros: Sealed 12-inch servo with 370W RMS offers excellent value. Very musical and can disappear in small rooms. Digs to 14Hz with excellent build quality and well-braced cabinet.
Full Rythmik F12 review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 370W RMS |
| Aux Input | No |
| CEA-2010-A Average (40-80Hz) | 119.3 dB |
| Cabinet Color | black |
| Coaxial Input | No |
| Country | United States |
| Dimensions | 15.7”H x 15.7”W x 17”D (400.0 x 400.0 x 431.8 mm) |
| Drivers | 12” (305mm) driver |
| Enclosure | sealed |
| Frequency Response | 14Hz extension |
| HDMI Input | No |
| Inputs | XLR (2), RCA (line/LFE) |
| Measurement Source | Brent Butterworth |
| Optical Input | No |
| Output SPL at 16 Hz | 101.0 dB |
| Output SPL at 20 Hz | 103.6 dB |
| Output SPL at 25 Hz | 106.7 dB |
| Output SPL at 31.5 Hz | 113.5 dB |
| Output SPL at 40 Hz | 118.3 dB |
| Output SPL at 50 Hz | 119.1 dB |
| Output SPL at 63 Hz | 120.4 dB |
| Output SPL at 80 Hz | 119.6 dB |
| RCA Input | Yes |
| TRS Input | No |
| USB Input | No |
| Warranty | 5/3 |
| Weight | 75 lbs (34.0 kg) |
| XLR Input | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by Brent Butterworth; the published figures above come from this ASR subwoofer measurement thread.
- Head-to-Head Comparisons