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8240A Desktop Low Frequency Control

-musicman-, modified 10 Years ago.

8240A Desktop Low Frequency Control

Youngling Posts: 2 Join Date: 3/12/13 Recent Posts
I have just installed a pair of 8240A's on an old and very sturdy oak work desk. So,a hard shiny surface.
I've engaged the (Bank 1) switch 5 on both monitors. And going by ear alone it has improved the low end.

-I'd like to know how high off the desk I would need to elevate the monitors to negate a boost at around 160 Hz, and to leave the switches disengaged for a flat response.

I could easily raise them 5 cm or even a little bit more, by adding a small base platform for each monitor. But would that be sufficient?
That would bring the tweeters up to ear level as well. Then there would be no need to incline them on their stands either.
Looking forward to an answer on this,
1038, modified 10 Years ago.

Re: 8240A Desktop Low Frequency Control

Jedi Master Posts: 340 Join Date: 4/6/09 Recent Posts
Raising them off the desk will have immediate benefit. As you have 8240's simply run GLM Autocal, once you have your baseline measurement, lift the speakers and re measure, you can do this numerous times to finalise your install. Simply focus on the red trace (in room response) in the interactive response editor, try and get it as flat as possible, focus on minimising the cancellations (notches) as these can't be eq'd out, a bump in the bottom end is normal, but autocal can effectively deal with this.

When i'm in studio's helping calibrate i always stress how important it is to get the speakers up and away from reflective surfaces. If you can get them to ear level or slightly above you will clearly hear the benefits.

Have fun, GLM makes this a very easy and educational task.
-musicman-, modified 10 Years ago.

Re: 8240A Desktop Low Frequency Control

Youngling Posts: 2 Join Date: 3/12/13 Recent Posts
Thanks a lot for your reply, Steve.
I don't have GLM yet, but plan to get soon.
Until then I'm going by ear.
Raising them up a few cm should be a piece of cake. Will do that first.