Spikes = to much bass???

lordsummit said:
I've sort of compromised in that there is obviously a big room node in my room, but unusually it's the ceiling that's the problem, I've got beams and not so solid floors up above, so it's this vibrating.
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There have been a couple of comments in this thread about room nodes being linked with part of the rooms structure resonating, be it floors, walls or ceilings. Is this the usual cause of a room node? I'd always assumed it was simply a standing wave set up in the room, as determined by its dimensions, and as such would be exactly the same if all the boundaries were made of solid concrete. Or at least that's what I'd assumed determined the main room nodes.

Croc - I queried what you meant by lift as my response you quoted had nothing to do with raising the speaker further from the floor, so I thought you'd meant something else. I guess moving the bass driver further from the floor would tend to reduce bass output as there will be less reinforcement from the floor.
 
penance said:
Well, it is certainly more aestheticaly appealing than the 1090 ;)
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Penance, as a fellow "Rotel to TacT" amp man, I'll be interested to hear your comments :D .

When's it due ?
 
penance said:
Should be here this week.
What TacT do you use?
Ive only gone for a power amp, so no correction stuff.
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S2150 power amp (RCS 2.0 pre).
I'm running mine fully digital so I can't really comment on your model as it a/d's the input signal but it should give you great power handling, crystal clear soundstage and I reckon it may even curb your bass problems (as mine did) which, should in turn, improve everything :cool: .

Enjoy !
 
There have been a couple of comments in this thread about room nodes being linked with part of the rooms structure resonating, be it floors, walls or ceilings. Is this the usual cause of a room node? I'd always assumed it was simply a standing wave set up in the room, as determined by its dimensions, and as such would be exactly the same if all the boundaries were made of solid concrete. Or at least that's what I'd assumed determined the main room nodes
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Perhaps what I should have said was sympathetic vibration. I'm not sure
 
penance said:
Hope so,

it'll be hanging off the end of a transcendant pre amp. Dont realy want to go fully digital as i would need an A>D for vinyl.
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Due to transparency of TacT gear, a good pre is essential. You should be fine ;) .

Will be interesting to hear your thoughts on the performance of vinyl with a digital [based] amp :) ?
 
MartinC said:
Croc - I queried what you meant by lift as my response you quoted had nothing to do with raising the speaker further from the floor, so I thought you'd meant something else. I guess moving the bass driver further from the floor would tend to reduce bass output as there will be less reinforcement from the floor.
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sorry, i wasn't around for a while.

yeas, i ment elevating/rasing from the floor.

your explanation makes sense - anyway that what hapened every time i did it.

7_V, i didn't get your point.
 
Steve, seems a good idea.

Ive checked the boards and the run the right way to make it easy, as in i would just have to roll the carpet back and lift boards in the one area and not the length of the room.
I was thinking of cross bracing in an X pattern, useing 3" x 3" timber. also screw down the boards after as it should be better than nails.
Is that the kind of thing you mean?
 
The introduction of spikes has one very significant effect - it raises the interface frequency. It's akin to the effect of ladies stiletto heels on a tiled floor. If the bass energy is prevented from passing through what is now a higher frequency interface, then it only has one place to go - into the room, hence the perceived increase in bass performance.
 
penance said:
I was thinking of cross bracing in an X pattern, useing 3" x 3" timber. also screw down the boards after as it should be better than nails.
Is that the kind of thing you mean?
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Yup, that kind of thing. I'm not sure how much difference using screws would make though.
 
Penance,
Have you tried turning the cones upside down? the speakers may have less resonance than the floor, doing this the speakers may transfer less resonance to the floor.

Just a thought. Bob
 

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