Reddit mentions: The best audio equalizers

This is the EQ you need. You can find them used on eBay. Pretty much all generations of it do the same thing so don't worry too much about matching the series of EQ to the speakers.

The EQ unit sits inline between the pre-amp (or source) and the amplifier. Some receivers also have an "effects loop" or combination of pre-out/amp-in connections that would let you insert this into the path of a single unit.

Despite what was previously mentioned, equalizers don't inherently require more power to the speakers. Just don't underpower these (wattage is super subjective, but let's just say 35 wpc or greater should be fine) and don't expect earth shaking bass. Take some time working on room placement and you'll likely be pretty happy with these.

When I had a pair I did find they liked as much power as you can afford. I used a Kenwood 700M and a Kenwood M2A, both with excellent results.

I found this, but it's pretty expensive at $700

http://www.amazon.com/Rainbow-DSP-1-8-WiFi-Module/dp/B015OWIZPA

I don't know how well it works, but you could try this HDMI Audio Splitter. Alternatively, if your tv supports toslink or speaker outputs, you could use adapters to plug your tv into headphones TOSLink to 3.5mm/RCA

Maybe something like this would do the trick?

https://www.amazon.com/VICTONY-Optical-Extractor-Converter-Splitter/dp/B073Y3YZGD/ref=sr_1_3?ie=UTF8&qid=1511312286&sr=8-3&keywords=hdmi+to+optical+audio+converter

Would something like this work: https://www.amazon.com/dp/B073Y3YZGD/ref=cm_sw_r_cp_apa_yV6eAbTEBHAGD

you'd need an HDMI box that has an audio port.

Something like this

It's possible the dock may have some analog audio out, or there's always this sort of thing: https://www.amazon.com/Tomsenn-Extractor-Converter-Optical-Splitter/dp/B00NOJHDAY/ref=sr_1_7?ie=UTF8&qid=1480773359&sr=8-7&keywords=hdmi+headphone
Problem is volume control though.