I know the question of bi-amping has come up many times, but I have a specific question to my current situation, so please bear with me.
My parents had a 2 channel setup (no sub) with older Emotiva full range, floor standing speakers as mains and an older HK reciever (~90wpc). It sounded fantastic, but they recently "upgraded" to a newer receiver...the Onkyo TX-NR509. When I was done setting them up I noticed a dramatic drop in both volume and bass. When I say dramatic I mean I put on St. Saens' Organ Symphony and there was practially no bass let alone the chest rattling that I'm used to.
Needless to say we are searching for a new receiver and they do not have much to spend on it ($400) price range, and here comes the Yamaha RX-V667. It is a very reasonable price and will better suit their needs as far as features go. My question is that it also provides a "Bi-amping" option to use the SurrR & SurrL outs to power the high/mids and Main R & L to power woofer. Based on this configuration I have a couple questions:
1) Is this passive bi-amping or is there an electronic crossover within the receiver?
2) I know it this configuration will increase the SNR but will it provide the previously missing power that the bass was lacking?
3) I believe the Emotiva's are 4ohm, would this configuration result in a drop in inpedance that could potentially fry the receiver?
Thanks in advance, you guys are always so helpful