Speaker IP Rating Chart: What Each Digit Is Tested To, and Where It Can Be Mounted
Each IP digit is a specific laboratory test with a nozzle diameter, a flow rate and a stopwatch. IPX4 is 10 litres a minute of splash from any direction for five minutes; IPX7 is thirty minutes under a metre of still water; IP65 is dust-tight plus a 6.3 mm jet at 12.5 litres a minute from three metres. None of those tests covers UV, corrosion, vibration or time, which are the four things that actually finish an exposed driver.
By the Speakers Guru Editorial Team
An IP code is two digits, and each digit is a specific laboratory test with a nozzle diameter, a flow rate and a stopwatch attached. IPX4 means 10 litres per minute of splash from every direction for five minutes. IPX7 means thirty minutes under a metre of still water. IP65 means dust-tight plus a 6.3 mm jet delivering 12.5 litres a minute from three metres away.
Not one of those tests involves ultraviolet light, chlorides, vibration, temperature cycling or the passage of time — which are between them the four things that actually finish an exposed driver. A cone can pass IP67 on the day it leaves the factory and be chalky, faded and split at the surround three summers later, and the printed code will still be perfectly true.
Read the code as a mounting-position specification and nothing more. The table below turns each one back into the test it came from.
The two digits, in order
Read them left to right: solids first, then liquids.
- First digit, 0 to 6, covers solid ingress. A 5 means dust-protected — talc gets in, but not enough of it to interfere with operation. A 6 means dust-tight, with no ingress permitted at all. Both are tested in a chamber charged with 2 kg of talc per cubic metre for eight hours, with a partial vacuum drawn through the enclosure so dust is actively pulled at every seal.
- Second digit, 0 to 9, covers water, from a slow vertical drip through to high-pressure steam at 80 degrees C.
- An X in either position means that digit was not tested. It does not mean it failed, and it does not mean it passed. IPX7 tells you nothing whatsoever about dust.
- A trailing letter occasionally appears — K for the road-vehicle variants defined in ISO 20653, or letters covering access with a finger, a wire or a tool. Most speaker datasheets omit it entirely.
Treat every X as a blank, not as a pass. A driver marked IPX6 carries no stated dust rating at all, and for a pod bolted to a roll bar that is the digit doing the real work.
The ingress decode table
Code Test rig Duration Flow and pressure What it genuinely covers What it does not IPX4 Oscillating tube or handheld spray, water from every direction over the full enclosure 5 minutes minimum, 1 minute per sq m of surface 10 L/min at 50-150 kPa Splashes from any angle, rain blown sideways, hose overspray Direct jets, immersion, steam IPX5 6.3 mm nozzle held 2.5-3 m away 3 minutes minimum, 1 minute per sq m 12.5 L/min at roughly 30 kPa at the nozzle A garden-hose rinse from a sensible distance Pressure washing, immersion IPX6 12.5 mm nozzle held 2.5-3 m away 3 minutes minimum, 1 minute per sq m 100 L/min at roughly 100 kPa Heavy wash-down of an exposed panel, thrown spray Close-range pressure washing, immersion IPX6K 6.3 mm nozzle, road-vehicle variant per ISO 20653 1 minute per test position 75 L/min at 1,000 kPa Close-range high-pressure washing Immersion IPX7 Static immersion; lowest point at 1 m, top of the enclosure at least 150 mm below the surface 30 minutes 1 m static head, no flow Temporary submersion — a dropped unit, a flooded footwell Jets, unless separately tested and marked; sustained submersion IPX8 Static immersion deeper than 1 m, with depth and duration declared by the manufacturer Manufacturer-declared Manufacturer-declared Exactly what the datasheet states and not one metre more Anything the datasheet declines to state IPX9K 6 mm fan jet at 100-150 mm, 80 degrees C water, four angles 30 seconds per angle 14-16 L/min at 8,000-10,000 kPa Steam cleaning at close range Immersion IP5X Talc chamber, partial vacuum drawn through the enclosure 8 hours 2 kg of talc per cu m of chamber Dust-protected: ingress allowed but not enough to impair function Dust-tight sealing IP6X Same chamber, no ingress permitted at all 8 hours 2 kg of talc per cu m Dust-tight Water at any level IP65 IP6X followed by IPX5 8 hours, then 3 minutes minimum Talc, then 12.5 L/min from a 6.3 mm nozzle Dust-tight and hose-rinsable — the sensible default for an exposed pod Immersion IP66 IP6X followed by IPX6 8 hours, then 3 minutes minimum Talc, then 100 L/min from a 12.5 mm nozzle Dust-tight and wash-down rated Immersion IP67 IP6X followed by IPX7 8 hours, then 30 minutes Talc, then 1 m static head Dust-tight and survives temporary submersion Jets, unless IPX5 or IPX6 is also marked IP68 IP6X followed by IPX8 8 hours, then manufacturer-declared Talc, then a declared depth and time Dust-tight and rated for continuous submersion to a stated depth Jets, and any depth beyond the declared one Match the row to the exposure your mounting position actually sees. A panel that gets hosed needs IPX5 or IPX6, and an IPX7 mark on its own does not promise the unit survives a hose. Every duration in that table is minutes or hours, never years. The test establishes that the seal was intact on one day, under one pressure, at one angle, with clean fresh water within 5 K of the enclosure's own temperature. There is nothing in IEC 60529 that constitutes a lifespan claim, and no manufacturer is implying one by printing a code.
Higher does not include lower
This is the trap in the whole system, and it costs people drivers.
For the first digit the numbers really are cumulative: anything passing IP6X automatically satisfies IP5X, because dust-tight is strictly better than dust-protected. For the second digit they are not. IPX7 and IPX8 are static immersion tests, and passing them says nothing about resisting a jet — a jet loads a gasket sideways at far higher local pressure, which is a completely different failure mode from a metre of still water pressing evenly on every face.
A unit rated IPX7 can leak under a garden hose. That is not a manufacturing defect; it is the standard behaving exactly as written.
Manufacturers who have run both tests mark both, which is why you see IPX5/IPX7 or IP65/IP68 as a dual designation on the better datasheets. If a spec sheet lists only IPX7 for something that is going to be washed down, either ask for the jet test result in writing or assume it was never run.
The reverse holds just as firmly. IPX6 covers a 100 litre-per-minute jet and covers no immersion whatsoever. A panel that occasionally sits under standing water needs an immersion rating, and no amount of jet performance substitutes for one.
Rating by mounting position
Mounting position Exposure it actually sees Minimum sensible code Comfortable code Also required, and not covered by the code Motorcycle fairing pod, forward facing Rain arriving at road speed, which behaves like a low-pressure jet; spray thrown up off the road surface IPX5 IP65 UV-stable cone; gasketed terminal cup; a drain path at the pod's lowest point Handlebar clamp pod The same, plus direct hosing at wash time and continuous broadband vibration IPX6 IP66 Thread-locking compound on every fastener; strain-relieved lead; vibration-rated terminals UTV roll-bar pod Pressure washing after every outing, heavy airborne dust, impact from debris IPX6 IP66 with a stated IP6X The first digit matters more here than the second; a dust-protected 5 will not hold Boat gunwale panel, flush mounted Wash-down, spray over the rail, standing water sitting on a horizontal flange IPX5 on the front face IP65, with the rear-side condition declared separately 316 stainless grille hardware; a sealed magnet boot if the rear cavity is not dry Tower pod, high mount Continuous spray, sustained direct UV, high vibration on a slender mount IPX6 IP66 UV-stable surround material; here the UV specification matters more than the water digit Exterior soffit under a 600 mm overhang Wind-driven rain only; no direct fall, no jets IPX4 IPX5 UV-stable cone if any direct sun reaches the baffle Exterior wall, fully exposed Direct rain, periodic hosing, freeze and thaw cycling IPX5 IP65 Drainage at the cabinet's lowest point; a mount that does not trap water behind the baffle Bathroom ceiling, outside the shower zone Steam and condensation rather than spray IPX4 IPX5 A sealed back can, or a moisture-rated enclosure behind the cutout Bathroom ceiling, directly over the shower Direct spray arriving from below IPX5 IPX6 Fully enclosed rear; check the local zoning rules that govern fittings in that position Bilge, footwell or any below-deck position that floods Standing water for hours at a time IPX7 IP68 with a declared depth and duration Nothing rated IPX6 alone belongs in this position, whatever the jet figure says Find the position you are cutting into, buy no lower than the minimum column, and treat the final column as non-negotiable — it lists the things the IP code was never designed to test. Vibration is the variable none of this covers and it is the one that opens seals over months rather than minutes. A pod bolted to a roll bar or a handlebar clamp takes continuous broadband input, and a gasket that seals perfectly on a bench will fret its own mating face over a season. Thread-locking compound on every fastener, a compliant gasket rather than a hard one, and proper strain relief where the lead exits the pod are worth more in the long run than one extra step up the IP ladder.
The code says nothing about UV or corrosion
Component The specification worth asking for The cheap substitute How to tell them apart Grille fasteners and screws 316 stainless, which carries 2 to 3 percent molybdenum and resists chloride pitting 304 stainless, or zinc-plated steel A magnet barely grips 316 or 304; zinc-plated steel grabs hard and shows rust bloom around the screw head inside a season Grille 316 stainless, or moulded ASA or polycarbonate Painted mild steel Scratch a hidden edge — painted steel shows grey metal straight under the coating Cone UV-stabilised mica-filled polypropylene, or a coated composite Untreated paper, or plain polypropylene with no inhibitor Paper is obvious on sight; unstabilised polypropylene chalks and fades within two summers of direct sun Surround Santoprene, butyl rubber or treated cloth Foam Press it. Foam is soft, light and porous; rubber is dense and springs straight back Terminal cup Gasketed, with nickel-plated or brass terminals and a cable gland Open spring clips on bare steel spades Look for an O-ring or a moulded sealing lip behind the cup Crossover board, where fitted Conformal-coated, potted or fully encapsulated Bare board with exposed solder joints Ask for a photograph of the board; conformal coating is visible as a gloss film over the tracks Basket Injection-moulded composite, or powder-coated or anodised cast alloy Stamped steel with paint over it A stamped steel basket rings when tapped and rusts outward from the mounting screw holes first Lead-out wire Tinned copper with a moisture-blocking boot at the terminal Bare copper Tinned strands look silver; bare copper goes green at the first joint Voice coil former Kapton or fibreglass Paper Datasheet only. Paper formers swell in humidity and the coil starts to rub None of these appears anywhere in an IP code. Work down the list and get each answer in writing before you commit to a mounting position you cannot easily reach again. Notice how many of those rows are settled by looking at the product rather than the paperwork. A magnet, a fingernail and a torch resolve most of the list standing in a showroom, and the two that need a datasheet are the ones worth an email.
Front-face ratings and the panel assumption
Most flush-mount drivers are tested and rated as installed, which means the rating applies to the front face only.
The enclosure under test is the driver bolted into a panel and sealed with its supplied gasket. The magnet, the terminal cup and the rear of the cone all sit inside that enclosure and were never sprayed with anything. For a driver destined to live in a door card or a gunwale panel with dry space behind it, that is a completely reasonable way to test. It is also exactly why the same driver dropped into an open pod, with its motor hanging out in the weather, does not carry the rating at all.
Two questions settle it every time. Is the quoted code for the driver alone or for the driver installed in a panel? And is the rear of the motor sealed, boot-covered or simply open? A datasheet that will not answer the second question has already answered it.
Terminal cups decide more of this than people expect. A gasketed cup with an O-ring and a proper cable gland holds the rating from behind; a pair of open spring clips on the back of the basket does not, regardless of how well the front face performed.
A cone that faces up holds water
Mounting angle changes the real exposure more than a full step of IP rating does.
A driver mounted face-up in a horizontal panel collects standing water in the cone and holds it against the surround's outer glue joint for hours. The same driver in a vertical panel sheds everything in seconds. Tilt the panel even five degrees off horizontal and most of the problem drains away on its own.
- Give every enclosed pod a drain path at whatever becomes its lowest point once mounted — a 3 mm hole, deburred, with a short tube if the water has anywhere to pool.
- Do not drill a drain into a sealed cabinet you are relying on for its low-frequency alignment. A vented box is a different acoustic device with a different rolloff and a different excursion limit.
- Grilles trap more water than they shed. A fine mesh behind a grille holds a film across the entire face; a coarse open grille drains in seconds.
- Where the panel has to be horizontal, specify a driver with a raised outer flange and a moulded lip rather than a flat trim ring sitting proud of the surface.
- Keep the terminal cup at or below the level of the cone, never above it, so any water that does get behind the baffle runs away from the connections rather than onto them.
Installers see the same failure repeatedly on face-up mounts: the surround letting go at the outer glue joint first, on the low side, exactly where water sat. No part of the IP code predicts that, because the immersion test runs for thirty minutes and this one takes two years.
Ask for these in writing
- The full code with both digits stated, not an IPX-something.
- Whether the rating applies to the driver alone or to the driver installed in a panel.
- Whether jets and immersion were both tested, and the dual designation if they were.
- Cone and surround material by name, and whether the polymer carries a UV inhibitor.
- Fastener and grille alloy by number — 316 or 304, not the word stainless on its own.
- Whether the crossover board is conformal-coated, potted or bare.
- Whether the terminal cup is gasketed and whether the rear of the motor is sealed.
A manufacturer who answers all seven in an email is telling you something useful about how the product was built. One who answers with a marketing tier and a photograph of the box is telling you something too.