BEST SWIM AUDIO SYSTEMS MODEL — BSA-01 / STEALTH SERIES FREE SHIPPING / GLOBAL S5/26 RACE PROGRAM IPX8 WATERPROOF / 3M DEPTH 15HR BATTERY ENDURANCE BEST SWIM AUDIO SYSTEMS MODEL — BSA-01 / STEALTH SERIES FREE SHIPPING / GLOBAL S5/26 RACE PROGRAM IPX8 WATERPROOF / 3M DEPTH 15HR BATTERY ENDURANCE
Best Audio

Engineered
For Performance.

In and out of the water.

Shop Best Audio → Explore The System →
BEST Audio bone-conduction swim headphones
Designed for Performance
Premium Audio On Land or In Water
Secure. Comfortable. Built to Last
01  -  04
Underwater Performance

SEALED
FOR THE
DEEP.

IPX8 certification to 3 metres. Every joint ultrasonically welded. Every seal triple-tested at depth. The BSA-01 wasn't designed to handle water — it was designed to thrive in it.

Ultrasonic Welding
No glue, no gaskets. Molecular bond sealing throughout the entire chassis.
3M Depth Rated
Tested at racing depth pressure. Flip turns, dive starts, underwater kicks — no issues.
Chlorine Resistant
Military-grade coating stands up to daily pool sessions and saltwater training.
01
Swimmer underwater mid-stroke wearing the BSA-01
IPX8 / SEALED / 3M RATED
DEPTH RATING
3M
Below Surface
Bone Conduction Audio

SOUND
THROUGH
BONE.

No earbuds. No canal blockage. Titanium transducers transmit audio directly through the cheekbone to the cochlea. Open-ear awareness. Total immersion. Audio that works the way your body does.

28G Titanium Driver
Precision-machined transducer delivers audiophile-grade clarity through bone vibration.
Situational Awareness
Ear canal stays open. Hear your music and your environment simultaneously.
02
Side profile showing BSA-01 bone-conduction transducer placement at the temporal bone
// FIG · 02 · TEMPORAL BONE PATH
BSA-01 · ENC ACTIVE
32GB Onboard Storage

8,000
SONGS.
OFFLINE.

No phone. No case. No poolside risk. Load your sessions before training and leave your device in the bag. 32GB of onboard storage means your playlist goes everywhere you do — under, through, and past the wall.

Drag & Drop Loading
Mount as USB drive. Drop your files. No proprietary app required.
Bluetooth 5.4
Stream from poolside device, or go fully wireless with offline mode. Your choice, every session.
03
9:41
‹ Library
BSA
STEALTH · 01
RACE DAY MIX
Track 04 / 16
1:32 -2:35
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⏮
▶
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🔈
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iCloud Library18.4 / 32 GB
Engineering Brief

SPECIFI-
CATIONS.

Five numbers that define the entire system. No compromise. No excess.

Nº-01 IPX8 Waterproof Rating
Nº-02 15HR Battery Endurance
Nº-03 BT 5.4 Wireless Protocol
Nº-04 32GB Onboard Storage
Nº-05 ENC Environmental NC
Field Series · N4 Frames

THE LANE
IS SILENT.
THE WORK ISN'T.

Swimmer underwater wearing BSA-01
// FIG · 01
DEPTH · 1.2M · STROKE RATE 52
↗ TEMPORAL TRANSDUCER
BONE-CONDUCTION · DRY SEAL
01 · SUBMERGED · 50M FREESTYLE
01 · Submerged · 50M Freestyle
Swimmer dryland power block training with BSA-01
// FIG · 02
SLED · 80KG · 6×20M
02 · DRYLAND · POWER BLOCK
02 · Dryland · Power Block
Swimmer on the pool deck at sunrise wearing the BSA-01
// FIG · 03
ENTRY ANGLE · 38°
03 · BLOCK START · RACE DAY
03 · Off-Deck Warm-Up
Performance Comparison

WHY
BEST SWIM.

BEST SWIM
BSA-01 / STEALTH 		Generic Swim MP3 Aftershokz Swim
Waterproof Depth IPX8 / 3M IPX7 / 1M IPX8 / 1.5M
Onboard Storage 32GB 4–8GB 8GB
Battery Life 15 Hours 6–8 Hours 8 Hours
Bone Conduction ✦ ✕ ✦
Secure Fit (Turns) Race-Engineered Basic Standard
Bluetooth 5.4 ✦ ✕ ✕
Weight 28G 55G+ 36G
Competition Legal ✦ ✕ Varies
BSA-01 Stealth bone-conduction swim headphones
STEALTH SERIES
Stealth · 28G

BSA-01
STEALTH.

Four engineered systems in a single 28G body. Precision-machined, sealed, and tuned for the rhythm of the lane.

$ 79 USD
COLOR STEALTH BLACK
Free Global Shipping On all orders over $60 USD
30-Day Guarantee Risk-free trial period
Trusted by Clubs 14 national programs
Field Reports

TRUSTED
BY THE
FAST.

★★★★★

Stayed perfectly secure through 200 turns in a 10km session. No adjustment, no slippage. That's what I needed to trust it in competition.

JK
James K. National Squad Swimmer · AUS
★★★★★

I've tried every swim audio product on the market. The BSA-01 is the first one that actually sounds good underwater. The bone conduction clarity is remarkable.

SR
Sarah R. Masters Swimmer · 50+ Age Group Record Holder
★★★★★

We equipped our entire squad of 40 athletes. The consistency across units is impressive. Not a single failure in six months of hard training.

MC
Marcus C. Head Coach · Olympic Development Club
Support

COMMON
QUES-
TIONS.

Everything you need to know before you get in the water.

CONTACT SUPPORT →
Yes. IPX8 certified to 3 metres. Every unit is individually pressure-tested before shipping. Ultrasonically welded seams, not glued — so the seal lasts the life of the device, not just the first season.
Bluetooth does not transmit reliably underwater — this is physics, not a product limitation. The BSA-01 uses its 32GB internal storage for underwater playback. Load your playlist before you jump in. Bluetooth works perfectly on pool deck for streaming from your phone.
15 hours of continuous playback. That's a full morning squad session, dryland training, and the commute home — without a charge. Full recharge takes 90 minutes via magnetic charging dock.
That's exactly what it was designed for. The rear-fit frame wraps below the occipital bone with a titanium spring mechanism that adjusts to your head size. Tested across 14 nations with competitive squads through full race programs.
The BSA-01 is designed to meet current competitive swimming equipment guidelines for warmup use. Rules for in-race use vary by federation. We recommend checking with your specific federation for race-day compliance. For training — no restrictions.
30-day no-questions guarantee. Try it through a full training block. If it's not the best swim audio you've ever used, return it for a full refund — including return shipping.