[makkan00]

Originally Posted by VP Electricity

MS-8: Bluetooth echo problems, big and near impossible to fit into a stealth install, breaks the fader, unreliable in the field. Auto-tune seems to be questionable in the midbass for many E90 owners on this forum.

Bit one: can work really well, not cheap. In situations where you NEED the DRC, it's a very nice controller. IMO there is no need for a DRC in E90 installs, even with the Toslink input and the DA2, since volume is supported in SPDIF. Will auto-correct an electrical signal, but this capability is useless in HiFi cars, and useless in Top HiFi cars if DA2 is being used. Nice PC SW.

Helix: smaller, fits into tight spots, no DRC-type controller, parametric EQ for better tunability, not as much money. Allows weighted summing so more bass is derived from front channels. Has variable phase to sub channel. Nice SW, I like it a lot. Easier to get voltage preamp drive out from Toslink out than B1.

Bit one is a pretty old design now and there are many things EM Italy wants to do to the next generation.

Thanks for a quick comparison.