High current amp search

@lukaszwk Speaker cables too long can do exactly as you describe in the bass region so its something to sort out. The heavier cables can be run longer distances simply because their DC resistance is lower. 

With this speaker because of its rear firing ports where you place it will make a difference- the rear-firing ports can be used to decrease standing waves in the room. If a corner is nearby I would consider toeing in the speakers to allow the ports to fire into the corner. 

This should not be a too difficult load for most modern solid state amps. 

@atmasphere the speaker cables are 6.5 feet long and I believe they are 11 gauge approximately. I do use a subwoofer crossed over at 37 Hertz or so as well but as I've said, it's not really the quantity of bass as much as quality. The room is actually quite good in that regard provided I'm using the right amp.  the speakers are not  terribly hard to drive otherwise but from experience the bass does demand sufficient current to sound right, hence my search for the "right" amp. At least in my application

i would look at a Mark Levinson 3 series, 335 or 336 the both double down to 2ohms.

@mark200mph when you say - they need to be gone through every 7 to 10 years, what do you means exactly? I'm assuming you're not recapping them with that frequency. 

the speaker cables are 6.5 feet long and I believe they are 11 gauge approximately. I do use a subwoofer crossed over at 37 Hertz or so as well but as I've said, it's not really the quantity of bass as much as quality. The room is actually quite good in that regard provided I'm using the right amp.  the speakers are not  terribly hard to drive otherwise but from experience the bass does demand sufficient current to sound right, hence my search for the "right" amp. At least in my application

@lukaszwk +1

You may have to do some audition. As I mentioned earlier, there are class D amps (the self oscillating kind such as Hypex, Purifi, Orchard or our amp) that can handle the load of your speakers with no worries. Class D amps vary quite a lot in sound quality, moreso than any other kind of amp, because so much depends on getting the surrounding circuits right like the input buffer and power supplies. That is why you read so many different opinions about them.