| Back from Dallas and depressed ... [message #19221] |
Thu, 10 May 2007 12:33  |
SteveBrown
Messages: 330
Registered: May 2009
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Grand Master |
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One thing I noticed in Dallas, listening to a number of the demo systems, was that some had more bass "slam" than my set up at home. So I'm wondering why. I can tell right away that some of the systems had exagerated bass due to the small room, and that is easy to spot, it sounds bloated and boomy. What I'm looking for is clean tight bass that can thump you. Know what I mean? So give me some advice. If I measure about any equipment setup I can put my hands on, it's reasonably flat in my room from 50 on up. And I'm using high efficency system (min 97 db and up) - I've tried amps ranging from 2w to 8w to 30w. I've tried SS and tube. My conclusion so far is: 1) It isn't the speakers; 2) it isn't the amps. So it must be the room? My listening room is a large basement space that has concrete on the floor, front, and both side walls, normal stud wall on the back, and open joists on the celing. But the hotel rooms, I'm guessing, are about the same - some concrete, some stud walls. No? For speakers I've tried direct radiators, open baffle, and compression drivers (1000 hz up). By the way, I can make the bass boomy in my room, but it isn't a lack of bass, it's a lack of punch. As for driver size, I've used JBL 2226 in a 2.5 box (15" driver) and I've used 15" IB sub on OB. So I also don't think it is related to the size of the radiator I'm using. Should I be looking for a room suck out at some higher frequency? Any ideas?
Thanks!
Steve
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| Re: Back from Dallas and depressed ... [message #19222 is a reply to message #19221] |
Thu, 10 May 2007 13:40  |
Barry S
Messages: 15
Registered: May 2009
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Chancellor |
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I've got a small set of monitors and a sub in a small square room. Far from an ideal situation is being kind as the room is awful. The system had no slam or whump in it and had a somewhat congested quality overall. That changed by moving the listening position closer to the speakers. The chair went from a semi near field listening position to a very near field spot. It was probably a 4 or 6 foot change in the position of the chair. The system has slam in the new listening position and has lost the muddied congested quality.
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| Re: Back from Dallas and depressed ... [message #19230 is a reply to message #19221] |
Fri, 11 May 2007 22:34 |
Delgadas
Messages: 2
Registered: May 2009
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Esquire |
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I suppose most small rooms, especially rooms with low ceilings, simply don't have the volume needed to develop low frequencies. Driver size is not so critical providing they are capable of delivering the proper waves. A pipe organ can lay down some very low frequencies but the wavelength is so long, at 50Hz it may need more than 30 feet to develop. Otherwise, in a small room the sound will get all blended around and you won't be able to pick up the new transients. Bass traps in a small room can help by allowing the long waves to stretch out. In a small room there will be a node or nodes somewhere, not necessarily near the listening chair or even in the same room, where the bass will sound nice and tight. It's almost never where you want it to be. I've had a little success in my own low ceiling, far from ideal room. It's a little like tuning an instrument. After much fiddling around and with help from a friend with good ears, I ended up with dual subs, port down on the carpet with the driver facing a wall. Adjusting the distance from the walls makes huge changes in the location of the good nodes. I can get that nice rich satisfying thumping at my chair from 2 watts but it's still no Yes concert.
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