Firewire 800to 400 hub connecting 2devices

Hello ,im focusing in music production and i want to connect 2 firewire 400 devices in my i mac...but it has only one 800Firewire slot..
If i use a firewire 800 to 400 hub http://www.sonnettech.com/product/yinyang.html is that possible to connect the devices and work properly without loosing ac..Because they need stable ac power..
Thanks in advance

Hi,
Sorry to hijack this thread, but I'm also looking for a similar device. Daisy chaining has its limit in the cable cluttering world!!
While I find the Nitro device interesting, I'm wandering if there is equivalent device that can offer both FW800 and FW400 ports without having to change all my cables. Any idea?
I already have lots of FW800 and FW400 cables, so if I can prevent myself from buying adaptors or new cables, I would appreciate!
Thanks

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