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Can 7360 be made to play above 100hz in a stereo setup

rasmus-faber, modified 4 Months ago.

Can 7360 be made to play above 100hz in a stereo setup

Youngling Posts: 3 Join Date: 4/10/12 Recent Posts

Hello

Currently I have a pair of 7360 subs in my room, to complement my 8260s. 

I want to try and make the subs adress a null I have at 125hz. But since they can't be calibrated to go higher than 100hz that doesn't work. But, used as an LFE channel they go up to 150hz, so is there a workaround here of some sort? Would I be able to calibrate a higher x-over frequency manually in GLM somehow?

Alternatively, could I use the LFE input to get the monitors to play up to 150hz, but use ANOTHER DSP product to do the actual calibration between subs and mains? (i.e use both the subs and 8260 without the internal DSP)

Thank you!
 

Rasmus

costakis, modified 4 Months ago.

RE: Can 7360 be made to play above 100hz in a stereo setup

Padawan Posts: 36 Join Date: 2/13/19 Recent Posts

You cannot win over the null in this way. There are only two choices, in my hummble opinion. First to move the 8260 away from the front wall (start at around 1 meter away) and measure the response after every change to find the best placement. Of course your listening position will change. Can you do this? 

The second option is to read about room modes and room treatment. See here an example:  https://www.gearslutz.com/board/studio-building-acoustics/732294-how-treat-nulls.html

lukester, modified 4 Months ago.

RE: Can 7360 be made to play above 100hz in a stereo setup

Jedi Knight Posts: 198 Join Date: 4/22/10 Recent Posts

He probably wants to put the null to good use. since this band dioesn't work well anyway, you can at least hide the crossover there.

reasonable move if you have 2 tops 2 subs in close proximity.

rasmus-faber, modified 3 Months ago.

RE: Can 7360 be made to play above 100hz in a stereo setup

Youngling Posts: 3 Join Date: 4/10/12 Recent Posts

A bunch of experiments with positioning in my room has lead me to believe using a stereo sub setup will be my best shot at addressing the issue. So I'm looking for a technical solution to do that. I.e can one use the 7260 up to 150hz by using the LFE input? Even if that means using a different sub management than GLM.

This sub might not be the best use for this setup though, there are others which are more purposed for that range I guess...

costakis, modified 3 Months ago.

RE: Can 7360 be made to play above 100hz in a stereo setup

Padawan Posts: 36 Join Date: 2/13/19 Recent Posts

The dip is at 125 Hz, in the range of the monitors, not the subs. A different placement will certainly help you. Read here:  https://www.genelec.com/monitor-placement about the reflections & cancellations. This is what is written: 

Alternatively, the monitor could be moved considerably further away from the wall to eliminate back reflections. The cancellation frequency will be lowered below the low frequency cut-off of the monitor. When the monitor is moved away from the walls, it also moves close to the listener. This increases the direct sound level and reduces the reflected sound level which improves the sound quality.

Acoustical treatment of the walls is another solution. It could mean modifying the wall and making it very absorptive so that the amplitude of the reflected energy is small and does not cancel the direct sound. When a subwoofer is used to reproduce low frequencies the monitors can be placed more freely. The subwoofer(s) should be placed close to the wall(s). The monitors could be placed at distances where low frequency notches do not occur in their pass-band.