Short answer: the MartinLogan Dynamo 1100X is the proven choice, measured and ranked among subwoofers, while the newer REL Acoustics T/7x has no independent measurements yet and can only be compared on specs.
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 MartinLogan Dynamo 1100X side: 12-inch sealed driver with 650W amp delivers compelling deep bass with visceral punch and composure.
On paper: The REL Acoustics T/7x is rated down to 30Hz against 200Hz, though makers quote these at different tolerances. The MartinLogan Dynamo 1100X has more amplifier power, 650W against 200W.
Price: the REL Acoustics T/7x lists at $1,299 and the MartinLogan Dynamo 1100X at $1,274.99.
Buy the MartinLogan Dynamo 1100X if you want a speaker whose sound quality has been measured and ranked. It also has more power.
Buy the REL Acoustics T/7x if you want deeper rated bass, and you can wait for measurements to confirm how it sounds.
Looking for alternatives? See the complete Subwoofers rankings.
Specifications Side By Side
| REL Acoustics T/7x | MartinLogan Dynamo 1100X | |
|---|---|---|
| Price | $1,299.00 | $1,274.99 |
| Ranked | - | #29 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) | 650W RMS / 1300W peak |
| Frequency Response | 30Hz (-6dB) (Manufacturer specified) | 22-200Hz, ±3dB |
| Country | United Kingdom | United States |
| Output SPL at 15 Hz | - | 90.6 dB |
| Output SPL at 20 Hz | - | 95.9 dB |
| Output SPL at 25 Hz | - | 100.2 dB |
| Output SPL at 31.5 Hz | - | 106.5 dB |
| Output SPL at 40 Hz | - | 111.4 dB |
| Output SPL at 50 Hz | - | 115.1 dB |
| Output SPL at 63 Hz | - | 118.7 dB |
| Output SPL at 80 Hz | - | 120.7 dB |
| Output SPL at 100 Hz | - | 121.3 dB |
| Output SPL at 125 Hz | - | 120.7 dB |
| CEA-2010-A Average (40-80Hz) | - | 116.5 dB |
| Dimensions | - | 17.1”H x 15”W x 15.6”D (434.3 x 381.0 x 396.2 mm) |
| Weight | - | 46.1 lbs (20.9 kg) |
| Warranty | - | 3 |
| Cabinet Color | - | black |
| Measurement Source | - | Matthew J Poes |
| Inputs | - | XLR (LFE), RCA (LFE), RCA (stereo), speaker-level |
| 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
MartinLogan Dynamo 1100X: $1,274.99 Amazon eBay
Pros: 12-inch sealed driver with 650W amp delivers compelling deep bass with visceral punch and composure. Integrated Anthem Room Correction (ARC) software optimizes bass performance. Compact size with exceptional build quality.
Full MartinLogan Dynamo 1100X review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 650W RMS / 1300W peak |
| Aux Input | No |
| CEA-2010-A Average (40-80Hz) | 116.5 dB |
| Cabinet Color | black |
| Coaxial Input | No |
| Country | United States |
| Dimensions | 17.1”H x 15”W x 15.6”D (434.3 x 381.0 x 396.2 mm) |
| Drivers | 12” (305mm) driver |
| Enclosure | sealed |
| Frequency Response | 22-200Hz, ±3dB |
| HDMI Input | No |
| Inputs | XLR (LFE), RCA (LFE), RCA (stereo), speaker-level |
| Measurement Source | Matthew J Poes |
| Optical Input | No |
| Output SPL at 15 Hz | 90.6 dB |
| Output SPL at 20 Hz | 95.9 dB |
| Output SPL at 25 Hz | 100.2 dB |
| Output SPL at 31.5 Hz | 106.5 dB |
| Output SPL at 40 Hz | 111.4 dB |
| Output SPL at 50 Hz | 115.1 dB |
| Output SPL at 63 Hz | 118.7 dB |
| Output SPL at 80 Hz | 120.7 dB |
| Output SPL at 100 Hz | 121.3 dB |
| Output SPL at 125 Hz | 120.7 dB |
| RCA Input | Yes |
| TRS Input | No |
| USB Input | No |
| Warranty | 3 |
| Weight | 46.1 lbs (20.9 kg) |
| XLR Input | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by Matthew J Poes; the published figures above come from this ASR subwoofer measurement thread.
- Head-to-Head Comparisons