Mtrot,
If you want to experiment if the 9is will benefit with more power than 130w, you can assign two more channel from the rxv1800 to bi-amp the 9is.
To answer your questions:
1. a higher quality separate amp will improves sound,
2. fill with lead shot then add sand to fill up gaps will be the best way for mass-loading.
Hope this help
If you want to experiment if the 9is will benefit with more power than 130w, you can assign two more channel from the rxv1800 to bi-amp the 9is.
To answer your questions:
1. a higher quality separate amp will improves sound,
2. fill with lead shot then add sand to fill up gaps will be the best way for mass-loading.
Hope this help