| How close can you sit to a frontloaded bass horn without compromise? [message #16564] |
Sun, 30 May 2004 14:39  |
Peter Krojgaard
Messages: 30
Registered: May 2009
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Baron |
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With the new bass horns I am planning to build, I will be sitting about 9 feet away from the mouth of the bass horns. Will this cause any compromises regarding lack of bass (or any other problems)due to the rather short distance to the horns? (FYI, I will sit much longer away from the mid horns, so this is not the issue:-) I thank you a lot in anticipation and look forward to hear from you! Regards
Peter Krojgaard
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| Re: How close can you sit to a frontloaded bass horn without compromise? [message #16569 is a reply to message #16568] |
Mon, 31 May 2004 06:52  |
Bill Fitzmaurice
Messages: 335
Registered: May 2009
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Grand Master |
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That sensation is not a myth, it's room reinforcement. The response of the speaker doesn't change, but larger room dimensions do allow reinforcing nodes to develop. Those nodes are response peaks over narrow frequency bands, peaks that the ear is very sensitive to. They don't improve bass response, in fact they degrade it from the standpoint of flat response, but they do have the psychoacoustic effect of making the bass seem stronger. Another factor with larger rooms is sheer SPL; with a larger room there is a tendancy to turn things up louder, and that can have a huge effect on the perception of the bass content. To understand why just look at the Fletcher-Munson response curves and see what happens to the response of the human ear/brain to bass at different SPLs. Music program played at 100dB will sound completely different than the same material at 80dB, sounding far stronger in both the bass and the treble even though the relative frequency response is no different; what is different how your auditory system responds to sound at differing levels.
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| Re: How close can you sit to a frontloaded bass horn without compromise? [message #16595 is a reply to message #16569] |
Tue, 08 June 2004 09:18 |
Mark Seaton
Messages: 3
Registered: May 2009
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Esquire |
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Hi Guys, Another factor people often overlook with large bass horns and speakers in general are where the dimensions place the source relative to boundaries. Many times someone will have a very deep box which places the mouth as much as 4' from the front wall. Well friends, the reflection from that boundary places a big null at 70Hz. Curious how so many say that they can't get that "punch" from big bass horns up close... Take that box and turn it 90 degrees and fire it along the wall or into the corner and most will change their tune. Just something else to consider. -Mark Seaton
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