GSUS4 / Studio monitoring guide
Hear the mix.
Understand the low end.
Why engineers take the Kali Audio IN-8 2nd Wave seriously — and when adding a WS-12 V2 makes sense.
Fact-checked 25 September 2026 · Manufacturer specifications, independent measurements and professional use cases
You can spend hours adjusting a vocal or a kick drum when the real uncertainty is what your speakers are telling you. The Kali Audio IN-8 2nd Wave is worth considering because its design addresses the things engineers need to judge: tonal balance, placement within the stereo image and the relationship between bass and midrange.
Add a WS-12 V2 when decisions below the monitors’ strongest bass range become part of the job. The aim is to hear what your mix contains, then decide what should stay.
Start with the IN-8 pair for the main picture. Consider the WS-12 V2 for bass-heavy production, sound design or checking deep low-frequency content. Budget time for placement and calibration: a louder bottom end is not automatically a more accurate one.
01 / Reputation, with evidence
Why does the IN-8 keep coming up?
There is evidence of professional adoption. Kali documents IN-8 V2 installations at Studio Delux Immersive, associated with Matt Wallace and Will Kennedy, and The Village Studios. Both examples combine IN-8 V2s with other monitors and WS-12 subwoofers. These are manufacturer-published installation examples; the subs are listed as WS-12, without a V2 designation.[1]
Independent scrutiny matters too. Erin’s Audio Corner tested the actual IN-8 V2 with a Klippel measurement system and found a compelling combination of performance and value. His review also identifies limits: compression at high output, a roughly 160Hz resonance and occasional upper-midrange edge. Those findings make a better buying guide than a blanket claim of perfection.[2]
A note on popularity: these sources support a credible professional reputation. They do not establish unit sales, market share or a “best-selling studio monitor” ranking.
02 / The engineering case
Three drivers. A clear division of work.
A dedicated midrange
The IN-8 uses an 8-inch woofer, a 4-inch midrange and a 1-inch tweeter. Internal crossover points are 280Hz and 2.8kHz. That gives the midrange its own driver instead of asking the large woofer to cover the entire bass-to-treble handover.[4]
For a mixer, the practical attraction is the chance to assess vocal presence, guitar density and bass weight as distinct decisions. That is a reason to audition this architecture, rather than proof that three-way monitors always beat good two-way designs.
Visual 1 · How the drivers share the job
Nominal crossover regions · schematic, not to scale
The coaxial layout helps the stereo picture
The midrange and tweeter share an acoustic centre. The midrange cone also guides the tweeter’s dispersion, while the separate woofer keeps large bass excursions away from that assembly. Kali’s engineering rationale is more consistent spatial presentation around the listening axis.[4]
Try this when auditioning: place a dry vocal in the centre, then listen to a short stereo reverb and hard-panned guitars. Make small position changes at the desk. Judge how clearly you can follow each element; a dramatic first impression matters less than repeatable decisions.
Placement controls you can actually use
Boundary EQ presets and high/low trims help adapt the monitors to common desk, stand and wall placements. Horizontal use is supported with the appropriate setting. These are preset adjustments, not a microphone-based automatic calibration system.[3]
A useful measurement caveat: Kali acknowledges an 8–10kHz dip that can appear in one stationary on-axis measurement. Avoid attempting to flatten that one trace with a large corrective boost.[4]
03 / Why the generation matters
2nd Wave addresses an everyday irritation: self-noise.
Kali states a 12dB reduction in amplifier self-noise compared with the original IN-8 platform. The update also brings revised DSP, drivers and cabinet construction. Less electronics noise is particularly relevant when you sit close and work quietly.[5]
Graph 2 · Relative amplifier self-noise
Manufacturer comparison · lower is quieter
0dB reference
−12dB relative
04 / Going below the main monitors
Why add a WS-12 V2 to an 8-inch monitor?
An 8-inch woofer does not tell you the whole bass story. The IN-8’s published range starts at 45Hz within ±3dB; its 37Hz figure uses a wider −10dB limit. The WS-12 V2 reaches 30Hz within ±3dB, with 23Hz specified at −10dB.[3][6]
That additional reach matters when the job includes deep synth fundamentals, low rumbles or the tail of a kick. A mix can seem tidy on the main speakers while carrying energy lower down that still affects playback and processing.
Graph 3 · Compare the same frequency tolerance
Published low-frequency limits in Hz · shorter bars mean deeper extension
±3dB lower limit
−10dB lower limit
It also changes the workload
Use the sub’s high-pass outputs and the main monitors receive less deep-bass energy. That can reduce woofer excursion and preserve useful headroom in bass-heavy material. The improvement depends on programme, level and integration; there is no verified fixed “extra dB” figure for this pair.
A professional reason to extend the bass
Re-recording mixer Roger Guerin describes using a WS-12 V2 with MTRX Studio/DADman in a 7.1.4 room, reporting more confident low-frequency decisions after calibration. His mains were Meyer Amies, so this is evidence for the subwoofer’s working role, not a test of the IN-8 pairing.[7]
What makes the V2 relevant?
The official generation history identifies reduced noise on the high-passed outputs and additional crossover choices as V2 improvements. Those output electronics matter because your main monitors are downstream of them.[8]
05 / From boxes to a monitoring system
Connect through the sub. Then integrate it.
Stereo line outputs L + R
Start with the 80Hz crossover
- Set the main speakers first. Establish a symmetrical listening position and choose appropriate IN-8 boundary settings.
- Begin at 80Hz. Kali recommends this crossover for its monitors; the V2 offers 50–110Hz in 5Hz steps.[9]
- Place, measure and listen. Try the sub between the mains, then adjust placement if response is uneven. Check multiple nearby listening positions and familiar reference tracks.[10]
- Match the level and polarity. Seek a smooth transition, not the largest bass boost. The 0°/180° polarity switch does not replace time alignment.[9]
Bypass has two jobs. An optional footswitch mutes the sub and removes its output high-pass filter. The IN-8s resume full-range playback for comparison.[9]
Keep the listening level consistent during comparisons. If the sub sounds like a separate bass effect, revisit its level, location and crossover integration before changing the mix.
06 / Choose for the work you do
Pair first, or pair plus sub?
| Your priority | IN-8 2nd Wave pair | Pair + WS-12 V2 |
|---|---|---|
| Editing, vocals, guitars & general mixing | A sensible starting point. Learn the monitors and optimise placement. | Useful when deep bass becomes a recurring decision, rather than an occasional check. |
| Electronic music, bass-heavy mixes & sound design | Can handle much of the mix; use another reference for the lowest content. | Adds low-frequency reach and bass management when correctly integrated. |
| An untreated room with uneven bass | Work on positioning, listening location and treatment. | Additional bass output will not automatically resolve room modes. |
| Budget at 25 Sep 2026 | A$949 each × 2 = A$1,898. | Add A$2,149 for the sub: A$4,047 for the three units. |
Prices checked against GSUS4’s current listings. IN-8 monitors are sold individually. Totals exclude stands, cables, footswitch and delivery; prices and availability can change. Check the WS-12 V2 listing for current ordering and stock information.
Allow room for the subwoofer
At approximately 48.8 × 43.7 × 52.1cm (H × W × D) and a listed 27kg, the WS-12 V2 needs a considered place in the room. Its amplifier rating is 500W continuous / 1,000W peak. The larger headline number is not the continuous rating.[6]
Our buying recommendation: choose the IN-8 pair when you need the main monitoring system; add the WS-12 V2 when you can name the low-frequency decisions it will help you make.
Questions worth asking
Does the IN-8 require a subwoofer?
No. Start with a well-positioned pair if that fits your work. Add a sub for a defined need, such as judging deep synth bass, rather than assuming every studio needs one.
Does “23Hz” mean flat to 23Hz?
No. That is the WS-12 V2’s −10dB specification. The ±3dB lower limit is 30Hz, and your room changes the response you actually hear.[6]
Will one WS-12 V2 manage an entire Atmos system?
Its two-channel input/output path does not replace a multichannel monitor processor. Surround bass management needs external routing. The manual’s LFE and External modes do not feed the XLR outputs.[9]
Can I use a sub to fix a bass null?
A different source position may help, but it requires measurement and integration. Simply turning up the sub is not a dependable cure for cancellation at the seat.[10]
Make the next mix decision clearer.
Explore the IN-8 2nd Wave for the main picture, then choose the WS-12 V2 when deeper low-frequency monitoring belongs in your workflow.
Sources & verification
Checked 25 September 2026. Specifications are manufacturer-published; review findings belong to their authors. Listening examples and buying advice are GSUS4 editorial recommendations. No independent GSUS4 measurement or sales ranking is claimed. Graphics show specifications or labelled concepts, not invented acoustic measurements.
- Kali Audio — immersive installations: Studio Delux and The Village examples.
- Erin’s Audio Corner — IN-8 V2 measurements and review: second-generation test, with output and response caveats.
- Kali — IN-Series 2nd Wave user guide: driver sizes, crossover, frequency ranges and placement controls.
- Kali — IN-Series product and technical notes: coincident architecture and measurement guidance.
- Kali — 2nd Wave platform: manufacturer’s self-noise comparison and revision details.
- Kali — WS-12 V2 specifications: frequency tolerances, power and dimensions.
- Production Expert — Roger Guerin’s WS-12 V2 use case: first-person experience, published 28 December 2025.
- Kali — product generation history: original WS-12 versus V2.
- Kali — WS-12 V2 user guide: stereo routing, crossover, polarity, bypass and external processing.
- Kali — speaker positioning guide: placement and room interactions.
Product photos: Kali Audio, hosted on GSUS4’s Shopify CDN. Four videos include two official introductions, one independent measured review and one professional user perspective. Current Australian pricing: GSUS4 IN-8 listing and GSUS4 WS-12 V2 listing.
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