The 18 gauge cord is definitely not optimal for a large power amp. It will work, but it will compromise the sound of the amp.
I still use Parasound's "Wonderful" cord on a Parasound transport and as Rcrump says, it is quite good for a stock cord. I've had good results using Monarchy Audio's stock 14 gauge cords too.
Recently, I installed Signal Cable's 10 gauge power cable on my Parasound PLD-2000 preamp and it is performing to a very high level. I believe Signal Cable offers a 30-day satisfaction guarantee. Here's a link if you're interested: http://signalcable.com/speaker_cables.html
I still use Parasound's "Wonderful" cord on a Parasound transport and as Rcrump says, it is quite good for a stock cord. I've had good results using Monarchy Audio's stock 14 gauge cords too.
Recently, I installed Signal Cable's 10 gauge power cable on my Parasound PLD-2000 preamp and it is performing to a very high level. I believe Signal Cable offers a 30-day satisfaction guarantee. Here's a link if you're interested: http://signalcable.com/speaker_cables.html