Dear Brain74: About the best placement of your Auditor my advise is that you ask directly to Sumiko people, they can help you.
Now, you feel that have a bass booming sound, other than room placement, please analyse as follows: the Auditor is a medium efficiency speaker ( 88db ), it has a 4 Ohm nominal impedance ( low one ) that tell us that maybe it go down to near 2 Ohms in some frecuencies ( maybe in the bass ones ), its usuable bass frecuency is around 50 Hz.
All these specs tell us that the Auditors need a high current amplifier with very low output impedance that can put high current below 4 Ohms: your Concentra 1 can't do it, your Auditors needs a better match amplifier, maybe the Concentra 2 or other Rowland model. Again, ask to the Sumiko people: they have to help you.
Btw, don't wait to much in the low bass: 50 Hz are " only " 50 Hz, nothing more.
Regards and enjoy the music.
Raul.
Now, you feel that have a bass booming sound, other than room placement, please analyse as follows: the Auditor is a medium efficiency speaker ( 88db ), it has a 4 Ohm nominal impedance ( low one ) that tell us that maybe it go down to near 2 Ohms in some frecuencies ( maybe in the bass ones ), its usuable bass frecuency is around 50 Hz.
All these specs tell us that the Auditors need a high current amplifier with very low output impedance that can put high current below 4 Ohms: your Concentra 1 can't do it, your Auditors needs a better match amplifier, maybe the Concentra 2 or other Rowland model. Again, ask to the Sumiko people: they have to help you.
Btw, don't wait to much in the low bass: 50 Hz are " only " 50 Hz, nothing more.
Regards and enjoy the music.
Raul.