JBL Live Beam 3

Yes, both the Smart case and the Smart Tx are synched wirelessly to the headphones and can be used simultaneously.

Yes, the headphones have Multipoint Connection, which allows you to switch seamlessly between the connected devices. 

It is not uncommon to have charging problems with True Wireless headphones. You may encounter that charging stops, does not start at all or that one of the ear buds suddenly switches on and begins the pairing process. This is almost always caused by dirt on the metal charging contacts. These contacts are vulnerable because they can easily be contaminated by sweat, skin grease, or ear wax. They are usually gold plated, but gold plating does not prevent surface dirt.

If you have charging problems, the first step is to always clean all contact points, on each earbud and on the charging case.
You will need: cotton cloth or makeup swab, cotton swabs and rubbing alcohol. Also a pencil with eraser for further cleaning.

Use a cotton swab with some rubbing alcohol to clean the charging terminals of the headphones. Rotate the swab and scrub lightly on each contact surface, then use a cotton cloth to remove any dust and cotton residue left on the headphones. It is important to perform this process periodically to keep your headphones clean, thus avoiding affecting the charging speed/quality.

Wipe the contact pins in the charging case with a clean cotton swab. The swab can be slightly moistened with rubbing alcohol, but it is important that the interior is completely dry before closing the box. Use the cotton cloth and wait for it to dry.

Repeat until the contact points are visibly clean, and charging should work as designed.

Try cleaning the contacts with the tip of a pencil and the eraser at the end of the pencil, the graphite and rubber can help to re-establish charging also.
This procedure can be performed on all True Wireless Stereo earphones and cases.

The JBL product is in a deep sleep mode, which it is to prolong the lifetime of the battery. Connect the case to a charger for about 2 seconds to wake the product up and take the earbuds out from the case. Once you put the earbuds back in the case, it's ready to pair through Bluetooth. 

Double-tap the button on the right earbud, then on the third tap - press and hold the button for more than 5 seconds (until the unit shuts off). 
This restores the earbuds to the factory defaults.
TWS must be connected to perform the reset, so neither of the earbuds should be off or in the charging case.
It also may be necessary to remove or forget the earbuds from the list of paired Bluetooth devices in order to pair again.

PSAP (Personal Sound Amplification) is a new feature accessible within the JBL Headphones App. When this feature is turned on, it works similar to Ambient Aware, but it focuses on picking up vocal frequencies in front of you. 

 

1. GAIN: The Personal Sound Amplification function is designed to amplify sound in the vocal range, it can assist users with (limited) hearing loss to maintain conversations more easily, especially in noisy environments. It should then amplify the speech of the person sitting across from you, not the general ambient sound as with Ambient Aware. The algorithm uses beamforming to pick out the voice from the other sounds, much like what happens during a phone call, but instead of focusing on your own voice it focuses on the voice further away from you. The gain setting allows you to amplify those vocal frequencies.

 

2. BALANCE: The balance setting adjusts the amplification effect between your left and right ears using the slider. When set to 0 (in the middle), both ears will receive the same amplification, but depending on the user’s personal needs/preferences, they can focus the amplification more towards either the left or right ear. 

 

Personi-Fi 2.0 is a new feature available through the JBL Headphones App. This feature helps to personalize the sound using the best possible sound curve based on your hearing capabilities. It will first ask a few questions, and then check your current ambient audio. You will be informed that this step should be completed in a quiet environment. It will play a series of test tones in all the different frequencies wherein after each frequency test tone is played, it will ask you what is the lowest volume setting you can hear. Nine different sounds will be played in each ear (18 in total).

Simply press and release the button when you hear a sound. After it goes through all the test tones, it then calculates the best sound for your ears based on the results. It allows you to demo the results by playing a track. You will be able to toggle it on/off to hear the difference.

This headphone is supported by the My JBL Headphones App.

The JBL Headphones app supports the file types JPG and PNG. There is no limit on file size, as this depends on how much the phone and app can handle to load the image into the app. When you are uploading the image to the Smart Case, the app will make a screenshot of the image and cut the image, so it fits the shape of the screen. Therefore, the size of this screenshot will be smaller than the size of the image.

Make sure both headphones are fully charged to ensure that the issue is not due to one of the earbuds lacking power.

Check that the contact points on the headphones and the charging case are clear of dirt, so the issue is not due to the product not being able to charge.

The LED on the headphones will show a blue light when correctly inserted in the charging case.

Try to reset the headphones if the product is fully charged but are still only working in Mono mode.

A reset guide for the headphones can be found here: Reset guide