Separate volume for bluetooth devices?

[Rocko99991]

Can someone explain why some bluetooth devices have a separate volume control from the iPhone and others do not? For example Beats Solo 2 wireless, when you raise the volume on the headphone, the phone volume slider increases. When you raise the volume on a bluetooth speaker, it's independent of the iphones volume. Does anyone know why?

 

[cynics]

Can someone explain why some bluetooth devices have a separate volume control from the iPhone and others do not? For example Beats Solo 2 wireless, when you raise the volume on the headphone, the phone volume slider increases. When you raise the volume on a bluetooth speaker, it's independent of the iphones volume. Does anyone know why?

Different bluetooth profiles used and design choice.

Your Solo2's use the HFP (Hands free profile). Volume sync is a requirement since some hands free devices dont even have volume controls.

Speakers dont use HFP. While there are ways to sync the volume speakers, head units, receivers, etc dont tend to use it (I'm sure their are exceptions). Being able to control both independently is better while admittedly not as seamless to use. However consider the variables, my hi-fi doesn't really have a "max" so how long would my iPhone be through it set to max with no other way to further increase it? Deafening? Too quiet (generally the case)?

Depending on your music quality start by setting the phone to 75% and then adjusting the speaker. Minimize hiss and how hot it is. You can always adjust the phone up higher if the speaker is maxed.

 

[Rocko99991]

Different bluetooth profiles used and design choice.

Your Solo2's use the HFP (Hands free profile). Volume sync is a requirement since some hands free devices dont even have volume controls.

Speakers dont use HFP. While there are ways to sync the volume speakers, head units, receivers, etc dont tend to use it (I'm sure their are exceptions). Being able to control both independently is better while admittedly not as seamless to use. However consider the variables, my hi-fi doesn't really have a "max" so how long would my iPhone be through it set to max with no other way to further increase it? Deafening? Too quiet (generally the case)?

Depending on your music quality start by setting the phone to 75% and then adjusting the speaker. Minimize hiss and how hot it is. You can always adjust the phone up higher if the speaker is maxed.

Thank you. I assume the cheaper bluetooth headphones use a different profile unintentionally? Would it be a cost thing?