Short answer: the GGNTKT M3. It ranks #3 of 15 powered floorstanding speakers by sound quality (rated 4.7/5); the Grimm Audio LS1c + SB1 ranks #9 (rated 4.4/5).
The GGNTKT M3 is the more accurate choice. Huge active floorstanding speakers with exceptionally even, accurate sound and cardioid bass that copes well near a wall. Its measured preference score, a predictor of how neutral it sounds, is 6.61 against 5.73 for the Grimm Audio LS1c + SB1. The catch: Measured -3dB extension of 35.5Hz is useful but does not match the deepest-reaching towers here.
What the Grimm Audio LS1c + SB1 does well: A complete active monitor system with matching subwoofers, very wide dispersion, accurate sound and low distortion. The catch: The standard preference score is only 5.73, rising to 7.54 with an ideal subwoofer, because spinorama puts the system’s -6dB point at 45.4Hz despite the subwoofers.
Buy the GGNTKT M3. It is rated higher for sound quality than the Grimm Audio LS1c + SB1.
Looking for alternatives? See the complete Powered Home rankings.
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Specifications Side By Side
| GGNTKT M3 | Grimm Audio LS1c + SB1 | |
|---|---|---|
| Price | €29,950 per pair | $43,440 per pair |
| Ranked | #3 of 15 in Large Size Powered Floorstanding Speakers | #9 of 15 in Large Size Powered Floorstanding Speakers |
| Enclosure | 4-way bass reflex, cardioid-loaded bass (opposed front/rear woofers) | Active 2-way monitor on stand with integrated SB1 sealed subwoofer (3-way system) |
| Drivers | 56mm ring-diaphragm compression tweeter, 210mm (8”) paper-fiber midrange, 2x 260mm (10”) long-throw subwoofers | TPCD carbon composite tweeter (Seas); 8” Seas midrange-woofer; 10” up-firing SB1 subwoofer |
| Dimensions | 50.6”H x 19.6”W x 7.8”D (1286 x 499 x 199 mm) | 45.3”H x 20.5”W x 6.3”D (1150 x 521 x 160 mm) |
| Weight | approx. 154.3 lbs (70 kg) each | 119 lbs (54 kg) each with SB1 |
| Amplifier Power | approx. 1000W total (PASCAL Class-D UMAC modules) | 240W woofer and 100W tweeter per speaker (Hypex NCore); 400W per SB1 subwoofer |
| Frequency Response | 29Hz-20kHz (-3dB), 24Hz-22kHz (-6dB) | 20Hz-27kHz +0.5/-3dB with SB1 (manufacturer) |
| Coverage | 140 deg horizontal x 100 deg vertical (constant directivity waveguide) | - |
| Warranty | 2 years, extendable to 3 with product registration | - |
| Country | Germany | Made in the Netherlands |
| Spinorama Preference Score | 6.61 | 5.73 |
| Spinorama Preference Score with Perfect Sub | 8.59 | 7.54 |
| Inputs | XLR (balanced analog), XLR AES/EBU (digital), USB (calibration/control only, not an audio input) | Analog XLR, 3x AES/EBU, USB |
| XLR Input | Yes | Yes |
| RCA Input | No | No |
| TRS Input | No | - |
| Optical Input | No | No |
| Coaxial Input | No | No |
| USB Input | No | Yes |
| HDMI Input | No | No |
| AES Input | Yes | Yes |
| Aux Input | No | - |
| Bluetooth | No | No |
| Bass Extension (-10dB) | - | approximately 28.9Hz (measured, spinorama.org ASR data) |
| Maximum SPL | - | 105dB (measured by ASR) |
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