Commercial audio zoning is the planning layer every venue shares: a zone is any area staff would want to control separately, and the test is behavioral, not architectural. Three builds cover almost every case — a dual-output transmitter feeding one receiver per zone, a 70V distributed line with per-channel amplifiers, or a hybrid — and this site's 13 venue playbooks each apply the same test to their own floor plan.
Figures on this page were checked September 2026. Zone counts in the index summarize each playbook’s own published plan; follow the links for the per-venue detail.
The zone test
Every venue playbook on this site starts from the same sentence, because the same truth repeats across thirteen floor plans: a zone is defined by volume control, not by walls. Staff know where the zones are before any designer arrives — the bar that runs louder than the dining room, the gym studio that needs its own class audio, the hotel ballroom that belongs to tonight’s organizer. Writing the zone list down, with relative levels, is the first deliverable of a commercial audio project and the cheapest mistake-prevention there is.
The commercial design workflow backs this with structure. The Bogen design guide opens its survey with a per-area worksheet — each area’s dimensions, ceiling height and ambient noise level recorded before any speaker count begins — which is the formal version of walking the floor and marking the boundaries. Coverage math comes after zoning for the same reason recipes list ingredients before steps.
Zones also split by content, not only by level. The meeting room that must never carry background music, the classroom on its own lesson audio, the ballroom on an organizer’s feed — content separation is a zone boundary even where levels match. The test has two questions, and either answer can create a zone.
Three ways to build zones
| Build | How it works | Where it wins |
|---|---|---|
| Dual-output transmitter + per-zone receivers | Source transmits once; each zone’s receiver feeds its own amplifier | Retrofits, finished walls, two-to-three zone venues, patios — no new conduit |
| 70V distributed line + per-channel amplifiers | One amplifier channel drives many small speakers per zone at higher line voltage | Large floors, many speakers, new construction with open ceilings |
| Hybrid | Distributed line where conduit is easy; wireless across the awkward spans | Most real buildings: a main floor plus a mezzanine, patio or annex |
The wireless build is this site’s most-documented pattern because it solves the zoning problem at its root: the source transmits once, each zone holds its own level, and nothing crosses a finished wall. The distributed line is the scale answer — the 70V architecture behind most institutional ceilings, which carries dozens of small units on light cable. Most real projects are hybrids, and none of the three builds changes the zone list; the list comes first, and hardware follows it.
Zone counts across the venue series
Thirteen venue playbooks on this site apply the same test to thirteen floor plans. The counts below summarize each playbook’s own published plan — follow the links for the reasoning.
| Playbook | Published zones | The split |
|---|---|---|
| Restaurant | 2-4 | Dining / bar / patio / back of house |
| Café | 1-2 | Seating room / counter-or-patio |
| Bar | 3+ | Bar top / seating / TVs / patio |
| Gym | 3 | Cardio / strength floor / studio |
| Office | 3 | Open plan / meeting rooms / reception |
| Church | 3+ | Sanctuary / lobby / classrooms |
| School | 4 | Classrooms / hall / gym / grounds |
| Hotel | 5+ | Lobby / corridors / ballroom / gym-pool / back of house |
| Clinic | 3 | Waiting / treatment / back office |
| Retail | 3 | Sales floor / fitting rooms / stockroom |
| Salon | 2-3 | Stations / color bar / retail shelf |
| Cafeteria | 3 | Dining / serving line / kitchen |
| Brewery | 4 | Taproom / bar / event space / production floor |
Two patterns survive the survey. Three zones is the modal answer — most venues split into "the loud part, the quiet part, and the part with its own content." Wherever a venue has an outdoor space, that space tends to become its own zone: patios, terraces and grounds fight different noise, serve different schedules, and earn independence the first time a neighbor calls. Our patio guide covers that zone in depth, and the licensing layer every zone shares is summarized in the licensing guide.
Thirteen venue types, one artifact: a zone list with relative levels, written before anything is bought. Every playbook on this site would be a shorter read if that page existed first — and every horror story in them starts with a shopping cart that skipped it.
FAQ
The behavioral test this site applies across its venue playbooks: a zone is any area staff would want to control separately — its own volume at minimum, sometimes its own content. Walls do not define zones; differences in how areas are used do. An L-shaped café can be two zones; an open ballroom can be one.
A dual-output transmitter at the source rack feeding one receiver per zone. Each zone's amplifier holds its own level, there is no cable through finished walls, and the source stays single. It is the build this site documents for cafés, gyms, schools and shops.
When speaker counts grow and runs lengthen: many small ceiling units across a large floor, long cable runs, or new construction where walls are open anyway. The distributed line carries one amplifier channel to dozens of units; per-zone control comes from the amplifier channels, not the speakers.
Yes — that is the standard pattern. The source (a phone, tablet or player) feeds the transmitter or matrix once; each zone holds its own level. Content differences are a schedule decision, not a hardware decision, until a space truly needs its own program.
blafili T6.35 Bluetooth Transmitter
A 1/4-inch TRS plus RCA input with simultaneous transmission to two receivers, so two zones hold their own volumes from one playlist. One source, two zones, no new conduit.
- Bogen Communications, System Design Guide: site-survey worksheet (per-area environment and ceiling height survey before speaker counts) and ceiling-speaker layout rules by ceiling height. bogen.com/sites/default/files/2021-02/SysDsgn.pdf, accessed 2026-09-23
- JBL Professional, "Distributed Speaker Systems 101" — 70V distributed-line architecture. jblpro.com/en/site_elements/distributed-speaker-systems-101, accessed 2026-09-23
- blafili published product specifications (T6.35: 1/4-inch TRS + RCA input, simultaneous transmission to two receivers), per lab PROFILE caliber table, accessed 2026-09-23
- Venue playbooks in this section (restaurant, café, bar, gym, office, church, school, hotel, clinic, retail, salon, cafeteria, brewery) — zone lists as published on each page, checked 2026-09-23