Hi Henry,
Many of the above suggestions should help: improved digital source, cabling, removal of the PS300 (which can just be replaced with a good surge protector from Office Depot) and moving of the speakers (though along as they are not EXACTLY at distance evenly dividable into 12 or 18, you should be OK).
There are a couple of other things to look into will also improve the sound in a positive way (usually with little if any side effects if you are careful), and which may also fix your etched/brightness problems.
One is power cords. Many people have situations where the filled Shunyata cords: Black Mamba, Python, or Anaconda Vx filter out something coming in on the power mains that was causing irritation and that approaches like the PS Audio were just not capable of addressing.
The other is vibration control. Most tubed equipment, and especially the Lamm, respond very favorably to vibration control tweaks. We have had very good results with Acoustic Dreams amplifier stands (which are very reasonably priced) and so far have also had good results with HRS amplifier stands (which are more pricey), both with Lamm tubed equipment. Also pulsar points, HRS isolation plates, etc. There are also other fine solutions out there. The results can be astonishing and quite addictive - clearing up grunge you did not know was there (and hopefully the stuff that you do know is there!).
Hope this helps!
Mike
Many of the above suggestions should help: improved digital source, cabling, removal of the PS300 (which can just be replaced with a good surge protector from Office Depot) and moving of the speakers (though along as they are not EXACTLY at distance evenly dividable into 12 or 18, you should be OK).
There are a couple of other things to look into will also improve the sound in a positive way (usually with little if any side effects if you are careful), and which may also fix your etched/brightness problems.
One is power cords. Many people have situations where the filled Shunyata cords: Black Mamba, Python, or Anaconda Vx filter out something coming in on the power mains that was causing irritation and that approaches like the PS Audio were just not capable of addressing.
The other is vibration control. Most tubed equipment, and especially the Lamm, respond very favorably to vibration control tweaks. We have had very good results with Acoustic Dreams amplifier stands (which are very reasonably priced) and so far have also had good results with HRS amplifier stands (which are more pricey), both with Lamm tubed equipment. Also pulsar points, HRS isolation plates, etc. There are also other fine solutions out there. The results can be astonishing and quite addictive - clearing up grunge you did not know was there (and hopefully the stuff that you do know is there!).
Hope this helps!
Mike