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Pelonis · 26th March 2010

It is absolutely true that moving multiple subs around is a valid technique for working out some LF kinks. There are ways to calc where the subs go to attempt to fix room anomalies but experimentation is likely going to come into play. Same goes for locating a single sub. It can be calculated but doing it in real time is easy enough.

EQ was mentioned and there again is another very valid approach to fixing things up. Sometimes it's the best solution especially if the problem is not to severe. A little convincing of an area or two to behave with a good clean EQ is not a bad choice

By far my preference is to get the room under control rather than try to fix a bad room with sub juggling or equalizing. When I get a minute I'll dig up some graphs of a room I designed for Sony with a single 18" sub working down to around 10Hz. I took measurements with the mic in the cone and then at the listening position. It's flat in both locations. In fact there is little if any change pretty much anywhere in the usable are of the room. This provide a most pure experience of the LF in my humble opinion. It obviously takes a lot more thought and understanding but if you can handle it, it's a joyful outcome.

I really love to see you guys having these discussions about LF. My passion for acoustics started there about 30 years ago. All of my designs start with considering this first. Every single one. Hundreds of them.

Cheers

.

26th March 2010	#27
Pelonis Gear interested Joined: Dec 2008 Posts: 14	Treatment, multi-subs, EQ, All? It is absolutely true that moving multiple subs around is a valid technique for working out some LF kinks. There are ways to calc where the subs go to attempt to fix room anomalies but experimentation is likely going to come into play. Same goes for locating a single sub. It can be calculated but doing it in real time is easy enough. EQ was mentioned and there again is another very valid approach to fixing things up. Sometimes it's the best solution especially if the problem is not to severe. A little convincing of an area or two to behave with a good clean EQ is not a bad choice By far my preference is to get the room under control rather than try to fix a bad room with sub juggling or equalizing. When I get a minute I'll dig up some graphs of a room I designed for Sony with a single 18" sub working down to around 10Hz. I took measurements with the mic in the cone and then at the listening position. It's flat in both locations. In fact there is little if any change pretty much anywhere in the usable are of the room. This provide a most pure experience of the LF in my humble opinion. It obviously takes a lot more thought and understanding but if you can handle it, it's a joyful outcome. I really love to see you guys having these discussions about LF. My passion for acoustics started there about 30 years ago. All of my designs start with considering this first. Every single one. Hundreds of them. Cheers .