— Speaker Coverage · Hospitality
Rooftop lounge / bar — discreet background music, 14 x 9 m
Problem. A compact rooftop lounge wants warm, even background music that sets a mood without dominating conversation, from cabinets that read as architectural trim rather than obvious loudspeakers. The target is presence at a low level with wide, gap-free coverage across a small footprint.
Answer. This preset configures the planner for a 14 x 9 m lounge at a background-music target, a ~5 m listener distance and 45% power, using an ultra-slim wide-dispersion line source (here a K-array Vyper KV25) as the coverage unit. The planner reports SPL at the listener and the coverage radius that sets cabinet spacing along the perimeter.
02 / In depth
How this preset reads — the engineering view.
Lounge audio is a hospitality decision before an audio one: music should be felt everywhere and noticed nowhere. The standard is an even, low background level held across the whole seating area against a noise floor of conversation, service and open-air ambience, from cabinets that disappear into the interior.
The preset assumes a 14 x 9 m lounge, a restaurant-BGM target, a listener distance of about 5 m and a 45% power setting for background headroom rather than peak. The cabinet shown is a K-array Vyper KV25, an ultra-slim wide-dispersion line source TechnoGuru works with where the application fits; other compact point sources and slim line sources produce the same input shape, so compare in the dropdown.
Read the SPL at the listener against the low target (the planner flags excess headroom as wasteful in a background application) and the coverage radius, then step cabinets along the lounge perimeter so their wide horizontal spread overlaps and leaves no quiet corners. The suggested quantity is a baseline from area-divided-by-coverage that a real design refines around bars, obstructions and open edges.
This preset does not model the open-air roll-off and wind of a rooftop, the zoning between bar, seating and any DJ position that usually sits on separate amplifier channels, weatherisation for exposed cabinets, or the low-end support a slim line source needs from a discreet subwoofer. Final make, model and quantity are selected after drawings and site conditions are reviewed and remain subject to project requirement, consultant or client approval and availability. Use the brief wizard or /contact to route a safe enquiry summary to TechnoGuru's hospitality-audio scope.
What this preset deliberately does not solve
- Open-air roll-off, wind and weatherisation for a rooftop are not modelled here.
- Zoning (bar vs seating vs DJ) and subwoofer support are separate amplifier-channel decisions.
- Cabinet count is a coverage baseline; final placement follows drawings and a site review.
How this preset differs from its siblings
The gym and live-event presets target high, energetic music across large floors, and the auditorium presets prioritise speech dispersion. This preset is the smallest-room, lowest-level end of the calculator: a slim, near-invisible wide-dispersion cabinet at a low background target across a compact lounge, where gap-free perimeter coverage, not loudness, is the goal. It also differs from the hotel-lobby BGM preset by working a much smaller footprint with a slim line source rather than a lobby point source.
03 / Hydrated calculator
Try the configuration — live.
The calculator below is preloaded with this preset’s state. Adjust any input — your URL stays shareable.
— 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
94
dB · target 75 dB · headroom +19 dB
Coverage radius
13.7
metres · -6 dB axis
Quantity
1
boxes for 126.0 m²
A planning link — not a quote.
- model
- K-array Vyper-KV25 II
- max spl
- 108 dB @1m
- spl at listener
- 91 dB · max 94 dB
- dispersion
- H 140° · V 25°
- power
- 34 W applied · 75 W RMS
- bandwidth
- 150-18000 Hz
- impedance
- 8 ohm
- coverage
- r ≈ 13.74 m · area 592.9 m²
Ultra-flat 22 mm aluminium line source with four 1-inch drivers. The shortest Vyper — wide 140° horizontal spread from a strip that reads as architectural trim. Common in cafés, lobbies and boutique retail; recessable variants available.
What changes this estimate
- Room drawings & obstructions
- Confirmed ceiling height
- Finishes & absorption in the space
- Final loudspeaker model & dispersion
Feasibility
94 dB max at the listener carries 19 dB over the 75 dB target — comfortable headroom; a smaller cabinet may be more cost-effective.
A planning link — not a quote.
· Other presets for speaker coverage planner
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K-array Firenze KH8 SPL & coverage
A touring line-array cabinet has to hold intelligible level across a large live-event floor without over-driving the box or leaving the back rows short. For a 40 x 25 m room, the real question is not just ”will it get loud enough” but whether the rated output and the 120 x 30 degree pattern still deliver usable SPL and width at the listener position that matters most.
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· Next
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