Bass50 SKAA Wireless Guide

SKAA is a wireless audio technology developed by Eleven Engineering, a Canadian company that has spent over two decades researching and refining how wireless can better serve the needs of musicians, performers, creators, and listeners.

Why it was created

SKAA was born from a fundamental realization: Bluetooth and Wi-Fi were never made for audio. They were made for phones, computers, and networking—and audio was squeezed in as an afterthought. That meant unpredictable latency, limited range, dropouts in busy environments, and frustrating pairing processes. For professionals and music lovers alike, that wasn’t good enough.

Eleven Engineering believed the audio world deserved its own wireless protocol, one that treated sound like the priority. One that was easy to use, reliable in performance, and purpose-built to sound great every time.

How it works differently

Instead of using complex pairing or relying on external networks, SKAA uses its own lightweight and dedicated 2.4 GHz protocol designed to do one thing well: transmit audio cleanly and reliably.

• Bonding, not pairing: SKAA receivers use a single button to “bond” to transmitters. No passwords, apps, or pairing menus.

• Fixed low latency: SKAA maintains consistent delay between transmitter and receiver—19ms in Pro Mode or 36ms in Consumer Mode—so there are no surprises when watching videos, performing live, or syncing multiple speakers.

• Speaker-to-speaker sync: All SKAA receivers stay perfectly aligned, within 40 microseconds of each other.

• No Wi-Fi or Bluetooth interference: SKAA doesn’t rely on existing networks and was engineered to perform reliably even in crowded RF spaces.

What SKAA is

SKAA is a point-to-multipoint wireless audio system that lets one transmitter send high-quality audio to up to four receivers at once. It’s plug-and-play, fast, and reliable—whether you're running a stage setup, building a patio system, outfitting a vehicle, or just sharing a song with a friend.

You don’t need an app to get started. You don’t need to pair or enter codes. You don’t need to worry about dropouts in a busy parking lot or campground. You just hit Bond, and the music plays—loud and in sync.

Why we built the Bass50 with SKAA

When we set out to design the world’s first high-performance, battery-powered subwoofer, we knew we had to break the barriers of traditional audio systems. Portability couldn’t come at the cost of great sound. And wireless had to feel invisible. As if it weren’t wireless at all.

To achieve that, we needed a wireless protocol that was engineered for audio, not repurposed from another category. That’s why we chose SKAA.

SKAA gives the Bass50 the performance edge it deserves: reliable connections, fixed low latency, and the ability to sync multiple devices without drift or delay. Whether you’re listening in a vehicle, at a party, on a patio, or at a convert, SKAA keeps the beat locked in and the bass exactly where it should be: tight, deep, and right on time.

How the Bass50 implements SKAA

Because SKAA is built right into the Bass50, you can wirelessly send audio to SKAA receivers, pick up audio from SKAA sources, or turn off wireless completely—it all depends on how you’re set up.

• Host Mode: The Bass50 acts as the main speaker (transmitter). Connect your device directly to the Bass50, then send audio to other SKAA-enabled speakers. Icon will illuminate in white when this mode is active. Common use: When using the Trulli 3.5mm Vehicle Kit or SKAA-compatible speakers.

• Bypass Mode: SKAA wireless transmission is disabled. Icon will illuminate in white when this mode is active. Common use: When you’re using the Bass50 with AUX or USB audio.

• SKAA Receiver Mode: The Bass50 acts as a receiver, wirelessly connecting to other SKAA-enabled devices (like a SKAA transmitter or another Bass50 in Host Mode). Icon will illuminate in different colors when this mode is active. 

You can switch modes using the Cycle Mode Button on the physical unit, or within the Trulli App, which also lets you fine-tune how SKAA behaves in Host Mode (like adjusting output signal strength).

These flexible modes allow the Bass50 to fit into nearly any environment or setup—without any wires, dropouts, or complicated pairing.

Watch: Bass50 SKAA Guide

SKAA Controls on the Bass50

Control Panel Location (Physical):
Under the protective rubber flap to the right of the main controls on the front of the Bass50.

Control Panel Location (In-App):
Open the Trulli App and tap your Bass50. Then:

• Select the Sound Profile from the home screen,
  or

• Tap the gear icon (top right) and select Sound Settings.
  From there, scroll to the bottom to find the SKAA Mode selection.

Buttons and Functions:

SKAA Mode Selection (Physical & App):
You can switch between:

• Host Mode — The Bass50 transmits audio to SKAA receivers.

• Receiver Mode — The Bass50 receives audio from a SKAA transmitter.

• Bypass Mode — Disables SKAA completely for direct connection only.

Physical Button: Use the Cycle Mode Button under the side flap to cycle through all three.

• Host Mode: White LED icon

• Receiver Mode: Multi-color LED (based on status)

• Bypass Mode: White LED icon

In-App: Scroll to the bottom of the Sound Settings page and tap to select your desired SKAA Mode.

SKAA Bond Button (Physical Only):
In Receiver Mode, the Receiver Mode icon also functions as the Bond Button. This allows you to:

• Bond to new SKAA transmitters

• Mute/unmute

• Reset the Green List

• Control bonding behavior via short/long presses
  (See LED Command Reference below for details.)

Latency Mode Toggle (Physical Only):
Double-press the Trulli Button to switch between:

• Pro Mode (19ms latency, 2 receivers)

• Consumer Mode (36ms latency, 4 receivers)
  The Bass50 will disconnect briefly and reconnect in the selected latency mode. There is no app toggle for latency settings at this time.

SKAA Modes on the Bass50

Host 

The Bass50 sends its incoming audio signal — from Bluetooth, AUX, or USB — wirelessly to SKAA
receivers. This is the correct mode for use with the Trulli SKAA AUX Receiver in vehicles or other
SKAA-enabled speakers. The transmit indicator will glow white when active.

Pro Mode: This is the default mode for the Bass50. It can connect up to two SKAA enable receivers.
The latency is 19 ms to all receivers and the Bass50 will match the latency automatically. 

Consumer Mode: This mode can be enabled by pressing the Trulli Button twice. In this mode,
you can connect up to four SKAA enabled receivers. The latency is 36 ms to all receivers and the
Bass50 will match the latency automatically.

Receiver

The Bass50 receives wireless audio from another SKAA transmitter. When in this mode, you can
rotate through bonded transmitters using the SKAA Bond button. The SKAA status LED will glow
bright amber when playing audio from a SKAA transmitter. To ‘bond’ to a transmitter, press and
hold the SKAA Bond button for two seconds and it will turn bright green. Now, your Bass50 is on
the “Green List” meaning, it will remember this SKAA transmitter and will automatically connect to it
if the transmitter is on.

Bypass

The SKAA radio is turned off This is useful for when there are no other SKAA devices in your audio
system.

Pro Mode vs Consumer Mode

Pro Mode (default)

• Up to 2 receivers
• 19 ms latency

Consumer Mode

• Up to 4 receivers
• 36 ms latency

To switch to Consumer Mode:

• Press the Trulli Button on the Bass50 twice quickly.

Use Pro Mode for time-sensitive setups. Use Consumer Mode when you want to broadcast to more than two SKAA receivers.

SKAA Bonding

SKAA bonding is handled through a single multi-function button and LED indicator. You can rotate through transmitters, mute, reset the Green List, and even create a cluster of Bass50 receivers, all from this control panel.

When the Bass50 is in SKAA Host mode—such as when transmitting audio to a Trulli AUX Receiver or any other SKAA-compatible receiver—it will automatically stop transmitting if no audio is detected for 30 minutes while in Pro Mode (default setting). Once audio playback resumes, the Bass50 will automatically resume transmission.

If your Trulli AUX Receiver has been “green-listed” (bonded) to your Bass50, indicated by green LEDs, it will automatically reconnect. If the Trulli AUX Receiver hasn’t been previously green listed, there’s a possibility it may connect to another nearby SKAA transmitter instead of your Bass50. To ensure a seamless and reliable connection, we strongly recommend bonding your Trulli AUX Receiver to your Bass50.

Tip

Always ‘bond’ SKAA Receivers to the SKAA Transmitter (i.e. ‘Green List’). This will ensure the best connectivity experience. You can always, reset the receiver and allow it to bond with another SKAA Transmitter if you choose to. During playback operation, bonding makes it effortless.

SKAA Receiver Mode: SKAA Bond Commands

When the Bass50 is in SKAA Receiver Mode, it can connect to your favorite SKAA transmitters using a Green List (like a favorites list). The SKAA Bond Indicator will show green , amber , or red depending on the mode and command.

Here is a breakdown of the available commands:

Bonding = Adding a transmitter to your Green List

• Press and hold the SKAA Bond Button to add a transmitter.
• The Bass50 will remember up to 10 transmitters.
• LED turns green when bonded.

Green List Commands:

• Tap once: Rotate through favorite transmitters
• Tap twice: Search for new (non-bonded) transmitters
• Tap three times: Mute
• Tap four times: Red Mode (wait for specific favorite)
• Tap six times: Factory reset Green List
• Hold while powering on (Master receiver): Create a cluster of receivers

LED indicators help you understand what’s happening:

• Dim Green (slow flash): Searching
• Bright Green: Connected
• Flashing Red: Reset
• Solid Red: Cluster complete
• Slow Flash (any color): Muted

Command	Description	Button Action	Indicator
Add/Delete Transmitter	Manually add/delete the current transmitter to/from your Green List	Hold the SKAA Bond Button for 3 Seconds
Auto Add Transmitter	Automatically adds the current Amber transmitter to your Green List if you listen to it for 30 minutes.	No button action— it happens automatically
Green Mode	Rotate through your Green List transmitters (favorites). Once found, the search stops and audio plays from that transmitter.	Tap the SKAA Bond button once.
Amber Mode	Explore for new, unknown transmitters (ones which are not already on your Green List)	Tap the SKAA Bond button twice
Mute	Perform the command again to unmute; any click command will first unmute and then perform its function.	Tap the SKAA Bond button three times
Red Mode	If you have two or more transmitters on your Green List, power on only the one you want, and it plays automatically	Tap the SKAA Bond button four times
Factory Reset	Clear your Bass50’s Green List (favorites).	Tap the SKAA Bond Button six times
Create a Cluster of Receivers	Process 1. Power off all transmitters and receivers. 2. Hold the SKAA Bond button while powering on the Master Receiver until the indicator flashes red. 3. With the remaining receivers within 3 meters of the Master Receiver, power them on individually, waiting until their indicator flashes red before powering on the next one. 4. Once all receivers have powered on and their indicators stop flashing (turn solid red), power off all the receivers.	Hold SKAA Bond button while powering on the Master Receiver.

Signal Flow & Input Priority

• USB-C overrides Bluetooth automatically
• SKAA Host broadcasts whatever is currently playing, regardless of source
• Receiver Mode cannot be used at the same time as Host Mode

Outputs (AUX, USB-C, SKAA) always mirror the current active input.

SKAA Range & Band

• Range: Up to 50 meters (164 ft)
• Frequency Band: 2.4 GHz

Troubleshooting/FAQ:

1. How does the Green List Work?
   You can store up to 10 SKAA transmitters on your Green List. These are your “favorite” audio sources. Every time you add a transmitter, it assigns the first open spot on the Green List. When you single click the Bond Button, the receiver hunts through the Green List much like a car radio hunts for strong stations when you press seek. If the indicator is dim Green and flashes every two seconds, this tells you the receiver is hunting through the Green List. Say you have 5 transmitters on your Green List: your receiver will run through the list one by one: 1, 2, 3, 4, 5 and then back to 1 and so on. The dim green indicator flashes every time the receiver moves to the next spot on the list. This hunting goes on for up to 1 minute. If your receiver doesn’t find any of your favorite transmitters, it stops hunting and just waits for the last bonded favorite. If the receiver does find one of your favorite transmitters, the indicator changes to a bright green, and your receiver starts playing audio from that favorite. A dim Green Indicator that is NOT flashing means the receiver is just sitting on one spot, waiting for a specific favorite transmitter to show up.
2. How do I bond with a specific green transmitter?
   Play audio from your source device and ensure it has a SKAA transmitter connected. Click the Bond Button on your receiver. The receiver hunts through the Green List, flashing the indicator as it goes. Once your receiver finds one of your favorite transmitters, it bonds to it and plays audio from that transmitter. If that isn’t the transmitter you wanted, click the Bond Button once more. Repeat until your receiver bonds with the transmitter you want and you’re hearing the correct audio playing.
3. How do I select transmitters if I can’t reach my Bond Button?
   Say you want to put your receiver on a high shelf where you can’t reach the Bond Button easily. First, set up your Green List: add all the transmitters you’ll want to use. Then de-click the Bond Button to enter Red Mode. Now put the receiver up on the high shelf. Power on just one of your transmitters and power off all others. The receiver automatically bonds to the transmitter that’s on.
4. How do I delete a transmitter from my Green List?
   Factory Reset (6 Clicks of the Bond Button) clears the Green List and lets you start over from scratch. If, however, you’d like to delete just one transmitter from your Green List, first bond your receiver to the transmitter you wish to delete. See the section above: How do I bond with a specific green transmitter? Once you are bonded to it, hold down the Bond Button for a few seconds until you see the indicator flash red — this red flash means the transmitter has been deleted.
5. What is a Cluster? 
   Clusters are an optional convenience for power users. A Cluster is several SKAA receivers behaving as one product. A left & right speaker pair, for example. Or a sound bar and subwoofer.
6. What is the Master receiver?
   In any Cluster, there is a single Master receiver, and all the other receivers in the Cluster follow its behavior. You can control the entire Cluster by operating the Bond Button of the Master. A receiver must have a physical Bond Button to become the Master.
7. How do I “duplicate” several receivers?
   Do the Make a Cluster of Receivers procedure once for each receiver but omit Step 3. Do them one at a time. This gives each of the receivers a functioning Bond Button, and each of them will thereafter operate independently.
8. What are some tips for making Clusters?
   Each step in the Make a Cluster of Receivers procedure has a 10-second time limit. When you see the Master’s Indicator start to flash Red, you have 10 seconds to power on the next receiver. When the next receiver’s Indicator starts to flash Red, you have 10 more seconds to power on the next one, and so on.
9. Why are only one of my Bond Buttons working?
   When you make a Cluster from several receivers, the first one powered on in the Make a Cluster of Receivers procedure becomes the Master of the Cluster. Only the Master’s Bond Button works because a Cluster uses just one Green List — the Master’s Green List. The Bond Button of each of the other receivers will only work for the Mute / Unmute function (3-Click of the Bond Button).
10. Can any group of receivers be made into a Cluster?
    No. The receivers must be members of the same product family. If they are not, the Make a Cluster of Receivers procedure won’t work. This is because only receivers which were designed to work together (as a single product) can be made into a Cluster.