All Optical audio is considered a "fixed" output, meaning volume will not attenuate from the TV remote. If you have an HD5/HD6 you can use the Audioengine remote for this. Fo

We take great pride in our products, and go through great lengths to ensure consistency and quality. For that reason, this item was randomly selected for an additional step of Quality Assurance.

Even though the HD5 has a built-in Bluetooth receiver, the HD5 are extremely versatile and can be used with a number of different devices, both digital and analog. There two analog inputs, a mini-stereo and RCA input, on the rear panel so you can directly connect any product with a line-level/preamp audio output, such as a turntable. The HD5s also have an optical input that utilizes the speakers' built-in DAC, so any source that has a digital optical output can be used directly with the speakers, such as the optical output of your television or computer.

The HD5s are slightly too big for our DS2M desktop stand, so we wouldn't really recommend them with the speakers. We've been using the IsoAcoustics as desktop stands for the HD5 and they've been working pretty well.

Yes they do! They are equipped with a power-saving circuit that turns off the speaker's final stage amp. This idle mode activates right after you stop playing music. Due to this power-saving function, it's perfectly fine for the speakers to stay on all the time!

It's pretty easy! Our powered speakers are an all-in-one solution with no extra amps or components needed! All you need to do is unpack the speakers, place them where you want, and then plug in the AC cord. Next, connect the powered speaker to the right passive speaker using the included upgraded speaker wire with banana plug tips. Finally, plug in your music (cell phone, turntable, computer, laptop, etc.) with the supplied cables or via Bluetooth and you're ready to go!

Once your HD6 is paired and connected, then open any app (iTunes, Spotify, Amarra, etc.) - or online players such as Youtube -  and it will automatically play your music through Bluetooth once you've selected what you want to hear.

No extra software or drivers are needed. The HD6 is compatible with any device that supports Bluetooth, and the A2DP profile for streaming stereo audio. This includes most smartphones, tablets, and computers.

You can absolutely still use the HD5 and it will sound great! AptX is a high-quality Bluetooth audio codec that works really well. In addition to mandatory support for SBC, Bluetooth also includes optional support for many other codecs, like MPEG-1, MPEG-2, MPEG-4, and AAC, all of which have their own advantages, and some of which sound very close to AptX.

For starters, you will need to use a powered subwoofer with analog inputs (either RCA or 3.5mm).  Simply connect the subwoofer to the RCA outputs found on the back of the HD6 speakers.  If your subwoofer only has a 3.5mm input, you could pick up a 3.5mm to 2-Male RCA Adapter cable to bridge the connection between your subwoofer and the HD6 speakers.

Please refer to the image below, using our S8 as a reference: