Short answer: the Aalto Speakers Aalto 9. It ranks #4 of 14 powered floorstanding speakers by sound quality (rated 4.7/5); the Grimm Audio LS1c + SB1 ranks #8 (rated 4.4/5).
The Aalto Speakers Aalto 9 is the more accurate, deeper-bass choice. Manufacturer measurements give it a 8.24 preference score without a subwoofer and 8.84 with an ideal one, the highest standard score of any speaker we list. Its measured preference score, a predictor of how neutral it sounds, is 8.24 against 5.73 for the Grimm Audio LS1c + SB1. Its bass reaches about 20Hz before falling 10dB, against 28.9Hz for the Grimm Audio LS1c + SB1. Watch for: The data is the manufacturer’s own and spinorama rates its quality as low, so the scores lack independent confirmation.
Why pick the Grimm Audio LS1c + SB1: Independently measured by Audio Science Review as a complete system with its SB1 subwoofers, with 0.83 listening-window smoothness and 0.38dB average on-axis deviation. Watch for: 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 Aalto Speakers Aalto 9. It is rated higher for sound quality than the Grimm Audio LS1c + SB1.
Looking for alternatives? See the complete Powered Home rankings.
Specifications Side By Side
| Aalto Speakers Aalto 9 | Grimm Audio LS1c + SB1 | |
|---|---|---|
| Price | €29,990 per pair | $43,440 per pair |
| Ranked | #4 of 14 in Large Size Powered Floorstanding Speakers | #8 of 14 in Large Size Powered Floorstanding Speakers |
| Enclosure | 3-way active, bass reflex | Active 2-way monitor on stand with integrated SB1 sealed subwoofer (3-way system) |
| Drivers | 21” paper-cone woofer, 10” paper-cone midrange, 1” compression driver on horn | TPCD carbon composite tweeter (Seas); 8” Seas midrange-woofer; 10” up-firing SB1 subwoofer |
| Amplifier Power | 1500W total per speaker | 240W woofer and 100W tweeter per speaker (Hypex NCore); 400W per SB1 subwoofer |
| Crossover Frequency | 220Hz and 1.45kHz | - |
| Frequency Response | 20Hz-24kHz (manufacturer) | 20Hz-27kHz +0.5/-3dB with SB1 (manufacturer) |
| Bass Extension (-3dB) | 20.3Hz (measured, manufacturer data on spinorama.org) | - |
| Bass Extension (-10dB) | below 20Hz (measured, manufacturer data on spinorama.org) | approximately 28.9Hz (measured, spinorama.org ASR data) |
| Inputs | Analogue XLR, AES/EBU XLR, USB, optional Dante | Analog XLR, 3x AES/EBU, USB |
| DSP | FourAudio room correction software (Windows/Mac), touchscreen control | - |
| Spinorama Preference Score | 8.24 | 5.73 |
| Spinorama Preference Score with Perfect Sub | 8.84 | 7.54 |
| XLR Input | Yes | Yes |
| RCA Input | No | No |
| Optical Input | No | No |
| Coaxial Input | No | No |
| USB Input | Yes | Yes |
| HDMI Input | No | No |
| AES Input | Yes | Yes |
| Bluetooth | No | No |
| Country | Made in Finland | Made in the Netherlands |
| Maximum SPL | - | 105dB (measured by ASR) |
| Dimensions | - | 45.3”H x 20.5”W x 6.3”D (1150 x 521 x 160 mm) |
| Weight | - | 119 lbs (54 kg) each with SB1 |
Frequency Response Compared
Both speakers’ spinorama measurements, overlaid. A flatter line is more neutral: peaks sound forward or harsh, dips sound recessed. Each curve is shifted so its average from 300 Hz to 3 kHz sits at 0 dB, so loudness differences between the two are removed and only the shape is compared. The two were measured by different sources, so small differences, especially in the bass, can come from the measurement setup rather than the speakers.
Measurement data: Aalto Speakers Aalto 9 (measured by the manufacturer) and Grimm Audio LS1c + SB1 (measured by Audio Science Review), via spinorama.org.
Related Speaker Comparisons
How Aalto Speakers Aalto 9 compares with other leading options:
- Aalto Speakers Aalto 9 vs GGNTKT M3
- Aalto Speakers Aalto 9 vs Pitt & Giblin Superwax
- GGNTKT M3 vs Grimm Audio LS1c + SB1
- Pitt & Giblin Superwax vs Grimm Audio LS1c + SB1
- Pitt & Giblin Superwax Mini vs Grimm Audio LS1c + SB1
Prices on this page were last checked October 14, 2026 at 2:38 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
Aalto Speakers Aalto 9: €29,990 per pair Aalto Speakers eBay
Same family: the Aalto Speakers Aalto 1 EVO (smallest bookshelf, rated 4.3/5), the Aalto Speakers Aalto 3 Passive (bookshelf, rated 4.2/5) and the Aalto Speakers Aalto 3 Active Pro (largest bookshelf, rated 4.7/5).
Pros: Manufacturer measurements give it a 8.24 preference score without a subwoofer and 8.84 with an ideal one, the highest standard score of any speaker we list. Bass is flat to 20.3Hz at -3dB, so it needs no subwoofer at all. The 1.3dB reference band, 0.96 listening-window smoothness and 0.36dB average on-axis deviation mean a very even tonal balance, and the horn-loaded compression driver with a 10-inch midrange keeps directivity controlled into the treble. Built-in 1500W amplification, AES/EBU and USB inputs, optional Dante and FourAudio room correction make it a complete active system.
Cons: The data is the manufacturer’s own and spinorama rates its quality as low, so the scores lack independent confirmation. At €29,990 per pair it is sold only by Aalto Speakers in Finland, made to order and currently on back order. The 21-inch woofer makes for a very large cabinet that needs a big room.
Full Aalto Speakers Aalto 9 review and specifications →
| AES Input | Yes |
|---|---|
| Amplifier Power | 1500W total per speaker |
| Bass Extension (-10dB) | below 20Hz (measured, manufacturer data on spinorama.org) |
| Bass Extension (-3dB) | 20.3Hz (measured, manufacturer data on spinorama.org) |
| Bluetooth | No |
| Coaxial Input | No |
| Country | Made in Finland |
| Crossover Frequency | 220Hz and 1.45kHz |
| DSP | FourAudio room correction software (Windows/Mac), touchscreen control |
| Drivers | 21” paper-cone woofer, 10” paper-cone midrange, 1” compression driver on horn |
| Enclosure | 3-way active, bass reflex |
| Frequency Response | 20Hz-24kHz (manufacturer) |
| HDMI Input | No |
| Inputs | Analogue XLR, AES/EBU XLR, USB, optional Dante |
| Optical Input | No |
| RCA Input | No |
| Spinorama Preference Score | 8.24 |
| Spinorama Preference Score with Perfect Sub | 8.84 |
| USB Input | Yes |
| XLR Input | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Grimm Audio LS1c + SB1: $43,440 per pair The Listening Room $43,440 eBay
Pros: Independently measured by Audio Science Review as a complete system with its SB1 subwoofers, with 0.83 listening-window smoothness and 0.38dB average on-axis deviation. ASR found the widest horizontal dispersion it had measured, very clean decay and distortion that stays low at 86 and 96dB. The -10dB point sits near 28.9Hz, and the SB1’s motional feedback controls the 10-inch woofer. It is a complete active system with Hypex NCore amplification, DSP crossovers and analog, AES/EBU and USB inputs. Measured bass extension of 28.9Hz (-10dB).
Cons: 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. At $43440 per pair with the SB1s, it costs far more than active systems that score higher. ASR measured a maximum of about 105dB, modest output for the price. Custom finishes add weeks to the dealer lead time.
Full Grimm Audio LS1c + SB1 review and specifications →
| Released | 2024 (2 years ago) |
|---|---|
| AES Input | Yes |
| Amplifier Power | 240W woofer and 100W tweeter per speaker (Hypex NCore); 400W per SB1 subwoofer |
| Bass Extension (-10dB) | approximately 28.9Hz (measured, spinorama.org ASR data) |
| Bluetooth | No |
| Coaxial Input | No |
| Country | Made in the Netherlands |
| Dimensions | 45.3”H x 20.5”W x 6.3”D (1150 x 521 x 160 mm) |
| Drivers | TPCD carbon composite tweeter (Seas); 8” Seas midrange-woofer; 10” up-firing SB1 subwoofer |
| Enclosure | Active 2-way monitor on stand with integrated SB1 sealed subwoofer (3-way system) |
| Frequency Response | 20Hz-27kHz +0.5/-3dB with SB1 (manufacturer) |
| HDMI Input | No |
| Inputs | Analog XLR, 3x AES/EBU, USB |
| Maximum SPL | 105dB (measured by ASR) |
| Optical Input | No |
| RCA Input | No |
| Spinorama Preference Score | 5.73 |
| Spinorama Preference Score with Perfect Sub | 7.54 |
| USB Input | Yes |
| Weight | 119 lbs (54 kg) each with SB1 |
| XLR Input | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons