Zoning background music across a hotel's venues means giving each space — lobby, restaurant, bar, pool, spa — its own source, volume, and schedule, without staff in one venue being able to touch another venue's audio. The practical way to do this is a network-based audio-over-IP platform such as Crestron's DM NAX, which assigns zones in software rather than running separate amplifier racks per venue, and then layering speaker selection and staff permissions on top of that zone architecture. Paging and life-safety override need to be scoped with your fire-alarm contractor and local code consultant, since those requirements are set by code and by the fire panel manufacturer, not by the audio platform itself. Getting that scope right, and documenting the whole system, matters as much as the zoning itself because that is what keeps the system correct once the integrator leaves the building.
How should venues be split into zones?
The first design decision is which spaces get their own zone versus which share one. A zone should map to how staff actually operate the room — a restaurant typically needs separate control from its attached bar even if they are adjacent, because meal service and late-night service run on different schedules and often different source material. Crestron's DM-NAX-8ZSA amplifier provides eight amplified stereo zone outputs from a single 2RU chassis, with a dedicated streaming player per zone so each zone can run independent content — Spotify Connect in the bar, a curated playlist in the restaurant, internet radio in the spa — without one source bleeding into another (DM-NAX-8ZSA). A single DM NAX system managed by a Crestron Home OS control processor can scale to 32 DM NAX devices and up to 256 audio output zones, so a property with dozens of distinct spaces — guest floors, multiple restaurants, a ballroom foyer, pool deck — doesn't run out of zone headroom as it grows. Zones can also be bussed together, permanently or temporarily, when a lobby and adjoining lounge should sometimes play the same program and sometimes split for an event.
Because DM NAX runs as audio-over-IP on the network rather than as point-to-point amplifier wiring, the question of "where is this venue's amplifier" becomes "which zone number is assigned to this venue," which is a software decision made — and changeable — after the physical install is largely done. That flexibility is worth discussing with your engineering team before construction locks in speaker runs, since it changes where equipment racks and amplifiers need to physically sit versus where the network backbone needs to reach. For the broader network and PMS context a hotel project needs before opening, see the hospitality technology overview.
70V/100V or low-impedance speakers — which venue gets which?
The choice between constant-voltage (70V/100V) distributed speakers and low-impedance architectural speakers is largely a wiring and run-length decision, and it typically varies venue by venue inside the same property. Constant-voltage speakers use step-up/step-down transformers so a single amplifier can feed many speakers over longer wire runs with lower current loss — this is the standard approach for distributed background music across large ceiling grids like a lobby, corridor, or spa. Sonance's Professional Series in-ceiling speakers are built with 70V/100V transformer taps specifically for this kind of commercial distribution, and the line is positioned for spaces like restaurants, retail, and boardrooms where many speakers share amplifier channels across a building (Sonance Professional In-ceiling Speakers). Sonance's Invisible Series speakers, built to disappear under up to 1/8-inch of plaster, paint, or wallcovering, also offer selectable 70V/100V taps alongside a 6-ohm low-impedance option, which matters where a restaurant or bar wants speakers gone from the ceiling plane entirely but still needs flexibility on how the amp channel is configured (Sonance Invisible Series Professional Models).
Low-impedance speaker runs generally suit shorter cable distances and fewer speakers per amplifier channel, where the amplifier is closer to the zone — a bar or lounge with a handful of ceiling or wall speakers near the rack room is a reasonable candidate to ask your integrator about. Ask them to map cable run lengths and speaker counts per venue before deciding tap settings, since that decision also affects how DM NAX zone outputs get consumed: a bridged 2.1 configuration on a DM-NAX-8ZSA, for example, uses up multiple speaker output pairs per zone, which reduces the amplifier's total available zone count.
How do zone permissions keep staff out of other venues' audio?
A network-zoned system like DM NAX lets the control programming restrict each venue's touch panel, keypad, or app access to only its assigned zone or zones, so a restaurant host can change the restaurant's volume and source without being able to reach the bar's or spa's settings. This is a programming decision made on top of the zone architecture described above — the zone count and bus/group options Crestron documents give the integrator the raw material, and the venue-by-venue permission model is what makes those zones usable by non-technical staff day to day. Each DM NAX zone also supports full DSP processing — EQ, delay, loudness, and speaker protection — so a venue's sound can be tuned to its room without affecting another zone's processing chain.
Before go-live, ask your integrator to walk through, venue by venue, exactly what each staff login or panel can and cannot touch, and to confirm that volume limits are set appropriately for each room.
What should be settled on paging and fire-alarm override before opening?
A zoned background-music system touches life-safety systems at the point where a fire panel or paging microphone needs to interrupt whatever is playing, and that interface is governed by fire code and the fire-alarm system's listing, not by the music platform's feature set. Ask your fire-alarm contractor and local authority having jurisdiction, early in design, exactly how override into the audio system must be wired, supervised, and tested for your property and jurisdiction, and have your AV integrator confirm in writing how each zone's amplifier or control programming will respond to that signal once it is defined. Because DM NAX distributes audio over the network rather than through a single hardwired matrix, it is worth asking the integrator specifically how an override signal would reach every zone — through the amplifier hardware, through control-system programming, or both — so responsibility for that interface is clear between the AV integrator and the fire-alarm contractor before either trade finishes.
What documentation should engineering receive at opening?
Hand-off documentation should let the hotel's engineering team diagnose and adjust the system without a technician on site for routine changes. A reasonable documentation set includes: a zone map naming every venue and its assigned zone number(s) and bus groupings; a wiring record showing speaker type (70V/100V tap settings or low-impedance) and run length per zone; the staff permission matrix showing what each login can control; and basic DSP settings per zone so a setting can be restored if it's accidentally changed. Because DM NAX zones are configured and monitored through a web interface, engineering should also receive login credentials and a short runbook for routine tasks like reassigning a streaming source or adjusting a zone's volume ceiling, rather than relying on the integrator for every small change after opening. Any fire-alarm or paging interface documentation and test records should come from, and be signed off by, the licensed fire-alarm contractor for the property.
Cave Group designs and builds this kind of venue audio zoning as part of its hospitality technology scope — AV, lighting, networking, and PMS integration delivered as one system rather than separate vendor contracts. For a related look at how a property's F&B spaces share lighting and video scheduling across a single day, see Running a Hotel F&B Venue: One Day, One System.
Frequently asked questions
What is the difference between 70V and low-impedance speaker wiring?
70V/100V distributed audio uses step-up transformers so one amplifier channel can feed many speakers over long cable runs with low signal loss, which suits large ceiling grids like lobbies and corridors; low-impedance wiring generally suits fewer speakers over shorter runs closer to the amplifier. Sonance offers both options within the same Professional and Invisible Series product lines, so the choice is a wiring decision made venue by venue rather than a single property-wide standard.
How many audio zones can a Crestron DM NAX system support?
A single DM NAX system managed by one Crestron Home OS control processor can handle up to 32 DM NAX devices and support as many as 256 audio output zones, with a SIMPL Windows program scaling further based on available network hardware. A single DM-NAX-8ZSA amplifier provides eight amplified stereo zones from one 2RU chassis.
Can staff in one venue accidentally control another venue's music?
Not if the control programming is set up correctly: each venue's panel, keypad, or app login should be scoped to only its assigned zone or zones, so a host or bartender in one space cannot reach another venue's volume or source settings. This permission model sits on top of the zone architecture and should be confirmed, venue by venue, before opening.
Who decides how paging and fire-alarm override integrate with the music system?
That interface is governed by fire code and the fire-alarm system's listing, so it should be defined by the property's licensed fire-alarm contractor and local authority having jurisdiction, with the AV integrator confirming how the control programming or amplifiers will respond once the requirement is set. This should be settled early in design, not assumed from the audio platform's general feature set.
What documentation should a hotel's engineering team get after a zoned audio install?
Engineering should receive a venue-to-zone map, a wiring record showing speaker type and tap settings per zone, the staff permission matrix, and login access plus a short runbook for routine changes like reassigning a source or adjusting volume ceilings through the system's web interface. Fire-alarm or paging interface records should come separately from the licensed fire-alarm contractor.