Speaker brands and models supported
The planner carries verified specifications for 122 professional speaker models across 8 brands. Every record cites the manufacturer datasheet URL with a retrieval date.
- Ecler: IC6, eMOTUS5OD
- Fonestar: ASPC-650T, AS-180T
- JBL Professional: VRX932LA, Control 65 P/T, Control 25-1, Control 28-1, AC15, AC18/26, CBT 50LA-1, CBT 70J-1, Control 26CT, Control 29AV-1, Control 31, ASB6118, CBT 100LA-1, VRX932LA-1, VRX932LAP, SRX906LA, PRX915, Control 14C/T, Control 16C/T, Control 19CS, Control 25AV, Control 50S/T, SRX815P, SRX818SP, SRX828SP, PRX918XLF, VTX A8, VTX A12, IRX108BT, AC195, AC299, AC599, CWT128, Control 67 P/T, SRX835P, SRX818S, ASB6128, CSS8004, CSS8008, CSS8018, 8124, 8128, 8138, LCT 81C/T, PRX412M, PRX415M, PRX425, PRX418S, EON710, EON712, EON715, EON718S
- K-array: Lyzard KZ1 I, Lyzard KZ14 I, Vyper KV25 II, Vyper KV52 II, Vyper KV102 II, Kobra KK52 I, Kobra KK102 I, Python KP52 I, Python KP102 I, Kayman KY52, Kayman KY102, Anakonda KAN200, Anakonda KAN200+, Anakonda KAN200+8, Tornado KT2, Tornado KT2C, Domino KF26, Domino KFC26, Domino KF210, Domino KF212, Turtle KRM33, Turtle KRM33P, Truffle KTR24, Truffle KTR25, Truffle KTR26, Rumble KU44-2, Mugello KH5, Mugello KH5P, Firenze KH7, Firenze KH8, Firenze KS7, Firenze KS8, Mastiff KM112P, Mastiff KM312P, Rumble KU26, Dragon KX12
- KGEAR: GH4, GH4A, GH12, GH412, GF22, GF22A, GF42, GF42T, GF42A, GF82, GF82T, GF82A, GF162, GF162T, GS6, GS6A, GS12, GS12A, GS18, GS18A, GS218, GS218A, GC8, GC8T
- L-Acoustics: K2, A15 Focus
- Yamaha Professional: DZR15, DZR10
- d&b audiotechnik: V8, Y8
Applications supported
- Live amplified music (105 dB target) — touring, festival, premium event.
- House of worship (90 dB) — sermon clarity priority.
- Conference / auditorium (85 dB) — speech-priority install with controlled reverb.
- Lecture hall (80 dB) — classroom and academic speech reinforcement.
- Restaurant / retail BGM (70-75 dB) — distributed background audio, conversation-friendly.
Speaker Coverage Planner — Engineering-grade SPL prediction
— Planner · speaker coverage
SPL, coverage radius and quantity, estimated.
Pick a brand, model and application. An indicative free-field SPL at the listener, coverage radius on the -6 dB axis and a planning-level box count for the room — a starting point for design, not a final specification. K-array, KGEAR, JBL Pro, d&b, L-Acoustics, Fonestar, Ecler.
Max SPL at listener
116
dB · target 85 dB · headroom +28 dB
Coverage radius
17.9
metres · -6 dB axis
Quantity
1
boxes for 240.0 m²
A planning link — not a quote.
- model
- L-Acoustics A15 Focus
- max spl
- 140 dB @1m
- spl at listener
- 113 dB · max 116 dB
- dispersion
- H 100° · V 10°
- sensitivity
- 105 dB @1W/1m
- power
- 350 W applied · 700 W RMS
- bandwidth
- 50-20000 Hz
- impedance
- 8 ohm
- coverage
- r ≈ 17.88 m · area 1003.9 m²
A-Series install-friendly line array. Panflex elements adapt dispersion per cabinet. Default L-Acoustics specification for premium worship and corporate auditoria.
What changes this estimate
- Room drawings & obstructions
- Confirmed ceiling height
- Finishes & absorption in the space
- Final loudspeaker model & dispersion
Feasibility
116 dB max at the listener carries 31 dB over the 85 dB target — comfortable headroom; a smaller cabinet may be more cost-effective.
A planning link — not a quote.
Quick answer
Speaker coverage planning estimates how many loudspeakers a room needs and roughly where they sit so sound pressure stays even across the seating area — derived from the speaker's coverage angle, mounting height and listener distance. This planner returns an indicative layout and SPL estimate for datasheet-cited models. It is a planning reference, not an acoustic design.
When to use
Early scoping of a PA, conference or auditorium audio system to gauge speaker count and spacing before an acoustic design.
When not to use
For reverberation and room-treatment questions, use the Acoustic RT60 Calculator. Final tuning depends on measurement, DSP and commissioning on site.
· Starting configurations
Typology presets — pick a scenario, see the calculator.
Each preset opens a curated configuration page with the engineering reasoning behind the numbers. Then the calculator loads with the same inputs — change them and the URL stays shareable.
Speaker Coverage · Hospitality
Hotel lobby — background music, 20 × 12 m
A premium hotel lobby needs even, conversation-friendly background audio at 70–75 dB without ceiling speakers that visibly puncture the architecture.
Open presetSpeaker Coverage · Auditorium
300-seat conference auditorium — speech-priority line array
A 300-seat corporate auditorium needs 85 dB of intelligible speech at the rear row with even SPL across the seating bowl and minimal visual impact.
Open presetSpeaker Coverage · House of Worship
500-capacity house of worship — touring-grade headroom
A 500-capacity worship space needs 90 dB of headroom for music programme plus speech, even coverage across pews and a system that won't be the visual subject.
Open presetPlan with confidence
From an SPL estimate to a system that sounds right everywhere
The planner gives an indicative SPL, coverage radius and box count — a starting point for design, not a final specification. These notes turn that into a brief: what stays fixed, what to confirm in the room and what to send us for a coverage review.
Planning notes
- SPL at the listener is the free-field floor — real rooms add reverberant energy, so a lively room runs louder than the prediction and a treated room runs close to it.
- Dispersion versus room geometry decides coverage uniformity — the right pattern is what separates 'good everywhere' from 'good only at the engineer's seat'.
- The box count is a first-order estimate against rectangular coverage; the manufacturer's prediction software (Soundvision, ArrayCalc) is the deliverable on the real project.
- Most install cabinets roll off above 60–75 Hz — a subwoofer pair is part of the brief, not an afterthought, for music programme.
Before final design, confirm
- Room drawings, ceiling height, finishes and absorption (RT60 behaviour).
- The SPL target for the application and the seating layout.
- The final loudspeaker model, dispersion and the amplifier / processor architecture.
- Sub-pairing, delays and the rigging / structural assessment where applicable.
What to share with us for review
- The floor plate, the seating layout and the SPL target.
- The brand preference, if any — or just paste the planner's share link.
- Whether the room is speech-priority or full-band music programme.
Share your drawings, BOQ, site details or the tool result with TechnoGuru for a written estimate after drawings, a BOQ or a site review.
Where this connects — services
· Engineering advisory · Speaker Coverage
SPL is the headline. Dispersion and room behaviour are the conversation.
The calculator answers 'how loud and how many'. The engineering underneath — dispersion pattern vs room geometry, direct field vs reverberant field, processor configuration, amplifier matching, cabling discipline — is what separates a system that sounds correct everywhere from one that sounds correct only at the engineer's seat.
Deployment observations
- SPL prediction by inverse-square law is the floor of a coverage conversation, not the ceiling. The calculator gives you SPL at the listener distance assuming free-field propagation; real rooms have reflections that add reverberant energy, often 3-10 dB at the listening position depending on RT60 and absorption. For lively rooms (RT60 > 1.2s) the actual perceived SPL exceeds the calculator's free-field prediction; for treated rooms the calculator's prediction is conservative-accurate.
- Dispersion pattern determines coverage uniformity. A 100° × 10° line-array element covers a wide horizontal seating block from elevation with controlled vertical energy — sermons, auditoria, live events. A 110° × 110° pendant ceiling speaker covers a circle of floor area — restaurants, retail. Specifying the wrong dispersion for the room is the most common cause of 'great seats and bad seats' in installs.
- Sub-pairing changes the brief. Most line-array and install cabinets roll off above 60-75 Hz. For live amplified music (kick drum, bass guitar, electronic music) a subwoofer pair extending to 35-45 Hz is mandatory. The calculator's frequency-range row tells you whether the cabinet stands alone or needs sub support.
Operational notes
- Amplifier sizing convention: provision the amplifier at 2-4× the speaker's RMS rating for clean headroom and to avoid clipping (which damages speakers more than peak power does). A 700 W RMS cabinet is typically driven by a 1400-2800 W amplifier per channel. The calculator's applied-power slider lets you sanity-check the SPL prediction against a realistic amplifier configuration.
- 100V line vs low-impedance is an architectural decision. 100V line tolerates very long cable runs (100m+) at minimal loss — default for distributed BGM in restaurants, retail and large public spaces. Low-impedance (8 ohm typical) delivers higher peak SPL and lower distortion — default for live events, premium worship and serious AV.
Lifecycle implications
- Driver lifecycle: quality install cabinets (K-array, d&b, L-Acoustics, JBL Pro) hold their performance for 15-25 years in climate-controlled rooms. Touring cabinets typically refresh on 8-12 year cycles driven by transport wear. Ceiling 100V systems run 20+ years if the room humidity is controlled.
- Processor and amplifier refresh: 8-12 years for system processors (BSS Soundweb, Symetrix, Q-SYS); 10-15 years for amplifiers. Plan amplification as a refreshable layer; the speakers and the structural cabling outlast the electronics by 2-3x.
· Why it matters
A speaker coverage calculator that quotes 'how many cabinets' without telling you the SPL at the listener is missing the question. One that doesn't carry dispersion data is missing the answer. This one runs the inverse-square law SPL math against manufacturer sensitivity, surfaces the coverage radius at the -6 dB dispersion axis, and recommends quantity against rectangular coverage area. Eight brands · 120+ verified models · sources cited per model · last verified 2026.
· Frequently asked
Speaker coverage —
what people ask first.
Why does SPL drop so much with distance?
Inverse-square law. Every doubling of distance drops SPL by 6 dB in free-field. A 100 dB SPL at 1m becomes 94 dB at 2m, 88 dB at 4m, 82 dB at 8m. In real rooms the reverberant field adds back some energy (typically 3-10 dB at the listening position) so the perceived drop is less dramatic, but the calculator's free-field prediction is the conservative engineering floor.
Why are line-array dispersions so narrow vertically (5-15°)?
Because line-array geometry is designed to control vertical coverage so that distant rows hear the same level as front rows. Each cabinet narrowly aims a slice of the audience; assembling 6-12 cabinets in an array creates a continuous vertical coverage from front-row to back-row with controlled level taper. Horizontally line arrays are typically wide (80-110°) because the seating block is wide.
What's the role of Soundvision / ArrayCalc / K-array prediction software?
Manufacturer prediction software models the actual room geometry (audience block, ceiling, side walls) against the actual speaker positions, splays and processor settings. The calculator gives you a first-order SPL estimate; manufacturer software gives you per-seat SPL prediction with reflections and array taper modelled. Use the calculator for early-stage scoping; specify Soundvision / ArrayCalc as a deliverable on the actual project.
What about Kasper Sound and other brands not in the database?
v1 focuses on 8 brands with broad professional coverage — K-array, KGEAR, JBL Pro, d&b audiotechnik, L-Acoustics, Fonestar, Ecler and Yamaha Professional. Kasper Sound and other domestic / international brands are not yet surfaced, pending verified datasheet collection. Send us the brand and the model spec via /contact; we add verified profiles in editorial batches. The calculator deliberately does not commit half-verified data — it would degrade the trust the tool exists to build.
How accurate is the quantity recommendation?
The quantity figure assumes uniform circular coverage at the -6 dB dispersion axis on the listener plane. It is a first-order estimate and tends to be conservative (recommends slightly more boxes than a manufacturer's prediction software would, because real coverage circles overlap and audio sums coherently). For final design always run the manufacturer's prediction software against actual room geometry.
· Begin
Designing an audio system
for a venue?
Send the floor plate, the seating layout, the SPL target and the brand preference. We respond within two working days with a coverage prediction, a processor architecture and an amplifier specification matched to the room.