Short answer: the Kali Audio IN-8 V2. It ranks #11 of 62 powered bookshelf speakers by sound quality at $499; the Focal Solo6 ST6 ranks #25 and costs $1499, so there is not much of a tradeoff to weigh.
What the Kali Audio IN-8 V2 offers: Three-way coaxial (coincident) driver in a front-ported cabinet, allowing near-wall placement without port noise issues; extensive dip switches handle boundary compensation, plus XLR/TRS/RCA inputs and a gain-matching volume knob. A built-in limiter makes it essentially impossible to push into mechanical distress - no cabinet buzzing, woofer bottoming, or audible failure even driven hard to 80-95dB in testing. Distortion stays below 1% THD at 86dB and under 3% at 96dB, largely thanks to that limiter. Frequency response and dynamic behavior stay essentially unchanged from 76dB up to 96dB/1m before the limiter engages around 96-102dB. Bass extends smoothly to about 50Hz. A clear step up in linearity over the original V1 version both on-axis and in estimated in-room response, and eliminates the hiss that drew complaints on the V1. Excellent soundstage depth, a benefit typical of coaxial designs, at $800/pair. Watch for: Notable forwardness/brashness in the 4-5kHz range when listened to on-axis, needing about 10° of toe-out (Kali’s own recommendation for the coaxial design) plus some EQ to fully resolve. A dip near the tweeter/voice-coil transition, likely a cancellation effect from the coincident driver’s geometry, is also improved by toeing off-axis. Bass rolls off below about 50Hz, so heavy low-bass material still needs a subwoofer. A minor resonance around 160Hz occasionally made low vocals sound a bit “hot,” though the reviewer rates it minor (about 2/10 in severity). Horizontal soundstage is narrower than non-coaxial alternatives, a typical trade-off of coincident driver designs. Vertical placement tolerance is fairly tight - usable to about ±10°, degrading past ±20°. Designed as a near/midfield monitor for roughly 1-3m listening distances, not intended as a home-theater speaker.
What the Focal Solo6 ST6 offers: Beryllium inverted-dome tweeter over a 6.5” ‘W’ composite sandwich-cone woofer - a low-mass, low-distortion driver combination rarely found below far pricier monitors. Directivity control is the tightest of this entire batch (directivity_spdi_stddev 2.87), and the listening-window response is smooth (smoothness_listening_window 0.380). Bi-amped 130W total (80W Class G woofer + 50W Class AB tweeter), each driver on its own amplifier. ‘Focus Mode’ switches the cabinet to a single-driver full-range reference signature for a second mix-translation check without extra hardware. Bass reaches 46.9Hz at -3dB / 38.1Hz at -10dB, solid for a 6.5” driver. Watch for: Bass alignment Q (lfq 0.826) is on the higher side, which can correlate with a touch of extra bass fullness/looseness versus a more critically-damped alignment. XLR-only balanced input, no unbalanced/TRS or digital connectivity. No automatic DSP room correction - tuning is limited to fixed analog shelving/high-pass switches. At $1,499 each ($2,998/pair), it’s a meaningful step up from typical prosumer active monitors.
Buy the Kali Audio IN-8 V2. It ranks higher for sound quality than the Focal Solo6 ST6 and costs less, so there is no real case for the other one.
Specifications Side By Side
| Kali Audio IN-8 V2 | Focal Solo6 ST6 | |
|---|---|---|
| Price | $499.00 | $1,499.00 |
| Ranked | #11 of 62 in Large Size Powered Bookshelf Speakers | #25 of 62 in Large Size Powered Bookshelf Speakers |
| Bass Extension (-10dB) | 36Hz (measured, Erin’s Audio Corner) | 38.1Hz (measured, spinorama.org) |
| Bass Extension (-3dB) | 44Hz (measured, Erin’s Audio Corner) | 46.9Hz (measured, spinorama.org) |
| Dimensions | 17.8"H x 10"W x 11.3"D (452.1 x 254 x 287 mm) | 24.6 x 33.4 x 29.5cm (9.7 x 13.1 x 11.6 in) each, 13kg (28.6 lb) each |
| Inputs | XLR, RCA | - |
| Weight | 22.9 lbs / 10.4 kg each | - |
| Drivers | 8" (203mm) woofer | 1" Beryllium inverted-dome tweeter, 6.5" "W" composite sandwich-cone woofer |
| App | No | - |
| Bluetooth | No | - |
| EQ | Yes (Room adjustment) | - |
| DSP | No | - |
| Output Power | 140w Per Speaker | - |
| Sensitivity | 89dB (measured at 0.3V/1m, Erin’s Audio Corner) | - |
| Maximum Output | - | 110dB peak at 1m |
| Amplification | - | 130W total, bi-amped (80W Class G LF + 50W Class AB HF) |
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More useful head-to-heads from the same speaker class:
- APS Klasik 2020 vs Yamaha HS8
- JBL 308P MKII vs Klipsch The Nines
- JBL 308P MKII vs Klipsch The Sevens
- Focal Solo6 ST6 vs JBL 308P MKII
- Edifier R2850DB vs Focal Solo6 ST6
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The Two Speakers In Full
Kali Audio IN-8 V2: $499.00 Amazon eBay
Pros: Three-way coaxial (coincident) driver in a front-ported cabinet, allowing near-wall placement without port noise issues; extensive dip switches handle boundary compensation, plus XLR/TRS/RCA inputs and a gain-matching volume knob. A built-in limiter makes it essentially impossible to push into mechanical distress - no cabinet buzzing, woofer bottoming, or audible failure even driven hard to 80-95dB in testing. Distortion stays below 1% THD at 86dB and under 3% at 96dB, largely thanks to that limiter. Frequency response and dynamic behavior stay essentially unchanged from 76dB up to 96dB/1m before the limiter engages around 96-102dB. Bass extends smoothly to about 50Hz. A clear step up in linearity over the original V1 version both on-axis and in estimated in-room response, and eliminates the hiss that drew complaints on the V1. Excellent soundstage depth, a benefit typical of coaxial designs, at $800/pair.
Cons: Notable forwardness/brashness in the 4-5kHz range when listened to on-axis, needing about 10° of toe-out (Kali’s own recommendation for the coaxial design) plus some EQ to fully resolve. A dip near the tweeter/voice-coil transition, likely a cancellation effect from the coincident driver’s geometry, is also improved by toeing off-axis. Bass rolls off below about 50Hz, so heavy low-bass material still needs a subwoofer. A minor resonance around 160Hz occasionally made low vocals sound a bit “hot,” though the reviewer rates it minor (about 2/10 in severity). Horizontal soundstage is narrower than non-coaxial alternatives, a typical trade-off of coincident driver designs. Vertical placement tolerance is fairly tight - usable to about ±10°, degrading past ±20°. Designed as a near/midfield monitor for roughly 1-3m listening distances, not intended as a home-theater speaker.
Full Kali Audio IN-8 V2 review and specifications →
| App | No |
|---|---|
| Bass Extension (-10dB) | 36Hz (measured, Erin's Audio Corner) |
| Bass Extension (-3dB) | 44Hz (measured, Erin's Audio Corner) |
| Bluetooth | No |
| DSP | No |
| Dimensions | 17.8"H x 10"W x 11.3"D (452.1 x 254 x 287 mm) |
| Drivers | 8" (203mm) woofer |
| EQ | Yes (Room adjustment) |
| Inputs | XLR, RCA |
| Output Power | 140w Per Speaker |
| Sensitivity | 89dB (measured at 0.3V/1m, Erin's Audio Corner) |
| Weight | 22.9 lbs / 10.4 kg each |
- Links
- Reviews, Comparisons and Sound Samples
- Erin’s Audio Corner: Kali IN-8 Second Wave Masterful Music on a Budget More from Erin’s Audio Corner →
- Erin’s Audio Corner Website Kali Audio IN-8
- Erin’s Audio Corner: I Tested 250 Speakers So You Don’t Have To!
- Erin’s Audio Corner Measurements (spinorama.org)
- Reddit Search for Kali Audio IN-8 V2 Review
- Head-to-Head Comparisons
- Kali Audio IN-8 V2 vs APS Klasik 2020
- Kali Audio IN-8 V2 vs Genelec 8040B
- Kali Audio IN-8 V2 vs Neumann KH 310 A
- Kali Audio IN-8 V2 vs Genelec 8050B
- Kali Audio IN-8 V2 vs Neumann KH 150
- Kali Audio IN-8 V2 vs Yamaha HS8
- Kali Audio IN-8 V2 vs JBL 4305P
- Kali Audio IN-8 V2 vs Genelec 8351B
- See all 26 comparisons
Focal Solo6 ST6: $1,499.00 B&H Photo eBay
Pros: Beryllium inverted-dome tweeter over a 6.5” ‘W’ composite sandwich-cone woofer - a low-mass, low-distortion driver combination rarely found below far pricier monitors. Directivity control is the tightest of this entire batch (directivity_spdi_stddev 2.87), and the listening-window response is smooth (smoothness_listening_window 0.380). Bi-amped 130W total (80W Class G woofer + 50W Class AB tweeter), each driver on its own amplifier. ‘Focus Mode’ switches the cabinet to a single-driver full-range reference signature for a second mix-translation check without extra hardware. Bass reaches 46.9Hz at -3dB / 38.1Hz at -10dB, solid for a 6.5” driver.
Cons: Bass alignment Q (lfq 0.826) is on the higher side, which can correlate with a touch of extra bass fullness/looseness versus a more critically-damped alignment. XLR-only balanced input, no unbalanced/TRS or digital connectivity. No automatic DSP room correction - tuning is limited to fixed analog shelving/high-pass switches. At $1,499 each ($2,998/pair), it’s a meaningful step up from typical prosumer active monitors.
Full Focal Solo6 ST6 review and specifications →
| Amplification | 130W total, bi-amped (80W Class G LF + 50W Class AB HF) |
|---|---|
| Bass Extension (-10dB) | 38.1Hz (measured, spinorama.org) |
| Bass Extension (-3dB) | 46.9Hz (measured, spinorama.org) |
| Dimensions | 24.6 x 33.4 x 29.5cm (9.7 x 13.1 x 11.6 in) each, 13kg (28.6 lb) each |
| Drivers | 1" Beryllium inverted-dome tweeter, 6.5" "W" composite sandwich-cone woofer |
| Maximum Output | 110dB peak at 1m |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons