Case of the dissapearing Bass

I didn't get a chance to read all of the above comments but I will tell you to check the phase. Use a nine volt battery and a small wire lead, touch the leads to the speaker wire at your amp (disconnect them from the amp first!). The positive lead of the battery goes to the suspected positive and the negative to the negative. If the sub moves in the leads are backwards, if it pushes out it is correct. That will give you a definitive answer as to the phase of the speakers, just make sure to test all of them. Then of course there is the possibility that you blew them up and they need replacing. Also the positioning of the speakers in the room can make a huge difference as well. So if they were to much up against a wall, and to little when pushed away. I would push them back towards the wall and raise them off the floor.

I hope I helped,
Andrew
Synesthesia Studios

Yeah Bryston in the past has been very bright almost too bright with past models. The Newer SST 2 seems to have to my ears anyhow , have remedied that with a much more even/full sound and from what I understand very favourable to many auido equipment reviewers. And BTW, your Rotels are quite good, so I agree with Zd542, nothing to be ashamed of and if these amps have been pleasing to you in the past, I would tweak around your room til the cows come home.

I have been playing around with the room a lot. I have made some changes which are very positive in the mid/ high area. but after more in depth investigation i have found that there is no bass when seated in the middle of the room.

If i sit on the floor i have bass, If i stand i have bass. Just no bass on a chair from the equilateral triangle listening point all the way to the back of the room. Its bloody odd.

The bass is everywhere and MASSIVE when in the centre beside/ behind the speakers. Its so massive i almost lose balance and soil my pants. As soon as I move forward its gone.

Might need to change your short wall / long wall set up. That or switch ends of the room with system and chair. This is definitely a room acoustic issue.

Ellrotts,

I have gone through MANY amps to find the ONE that has made my B&W 802D SING like I knew they could.
If you put "bright" or "warm" with them then that is what you will here.
They need LOTS of power and I do not mean just watts. I have also found they benefit from bi-wired or bi amped.

Some of the amps I have tried (with no other changes to my system); Theta Digital, Halcro, Bryston(14B SST2), Classe(600M), Nuforce(Ref18), Krell, Ayre, Pass Labs, Mcintosh, ARC, Spectron (Mono only) and several others.

Of the above the new Classe 600M and Pass Labs XA 100.5 and Spectron Mono came close but their size, heat, electric cost, and price gave me pause.

Then I had a chance to try a new Class D amp based on Hypex Ncore NC1200. It is the Veritas Mono by Merrill Audio.

All I can say is WOW! It gave my everything I was looking for and more. It was like I had a whole set of different speakers. And the BASE? Who needs a sub woofer.
And I am not the only one saying that about the Veritas and the base with their speakers.
Some of them own MBL and Maggie with Pass and ARC.

You might be able to demo them so contact Merrill and see what he can do for you.