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PostPosted: Mon Mar 20, 2017 5:14 am 
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Location: Fergus, ON, CA
Hypothetically speaking...If one had some bookshelf speakers (Paradigm Mini Mkii's...for example :wink: ) with rear bass port tubes and wish to increase the bass response slightly. Would is cause any long term damage by putting some foam or other type of material in the port?
I realize the speaker maker had good reason to put said port where they did...but I am throwing this silly question out there regardless.
Speakers would not likely have the backs placed close to a wall.

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Last edited by alexander_x on Mon Mar 20, 2017 7:08 am, edited 1 time in total.

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PostPosted: Mon Mar 20, 2017 6:29 am 
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Location: Burlington, ON, CA
"Plugging the port" is a common thing in the UK where smaller rooms and speaker placement closer to walls is more common.

Some manufacturers even include said foam bungs.

You won't hurt anything. You may notice less bass.

Straws (in a bundle that fill the port), socks, foam, all kinds of things to try!

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PostPosted: Mon Mar 20, 2017 6:46 am 
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I'm assuming from the name of the speaker that it is pretty small. The manufacturer probably has squeezed whatever bass can be gotten out of it. Lengthening the port will give more extension but probably roll off the bass earlier and perceived bass may be less. Likely the response is due to a shorter port that will give a little bump to the bass around 100 hz to give the impression there is more bass than is really there.

Stuffing the port is going to probably result in less bass but could help with subwoofer integration if you added one. Moving the speakers (probably closer to the wall) may increase bass. An amplifier with a little more power or some gentle bass boost could help. Ultimately, if you really need significantly more bass, you need a larger speaker or need to supplement the speaker with a subwoofer. You need to enjoy your particular speaker for what it was designed for and not try to make it do something it wasn't intended to do.


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PostPosted: Mon Mar 20, 2017 8:18 am 
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Location: toronto, ON, CA
Placing the speakers closer to the floor and tilting them upwards slightly may help.


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PostPosted: Mon Mar 20, 2017 9:29 am 
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You may want to try different fillers in different amounts as an easy mod.


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PostPosted: Tue Mar 21, 2017 9:02 am 
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thanks all for the input and suggestions.

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PostPosted: Tue Mar 21, 2017 9:35 am 
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Plugging the ports is always an option. Some manufacturers even include foam plugs for that purpose.

But if you wish to increase bass response, you'll need to find another way: plugging the ports can only decrease bass response.


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PostPosted: Tue Mar 21, 2017 9:55 am 
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Play with speaker placement.

Are they currently on stands or in a bookshelf? I believe they were designed to be used on stands.

If on stands, what is behind them? Anything absorbent (i.e. heavy curtains, furniture, etc.) could absorb (decrease) the bass response. Try putting something reflective behind the speakers and see what that does? Play with the distance.

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PostPosted: Tue Mar 21, 2017 11:38 am 
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Corner loading is the only way you'll get more bass out of these. You can get deeper bass using EQ if you plug the ports to raise power handling.

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