Forums
New posts
Search forums
What's new
New posts
Latest activity
Members
Registered members
Current visitors
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Audio and Video Talk
Acoustics & Room Treatment
Accoustic treatment behind rear ported bookshelfs
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Help Support AVForums:
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Message
<blockquote data-quote="ScottulusMaximus" data-source="post: 959073" data-attributes="member: 18165"><p>A 40Hz wave is +- 8m long. Unless you're putting 4m of insulation behind the speaker it will do nothing for the "boom".</p><p></p><p>606 LF response curve with bungs installed (in blue), it actually smooths the LF extension. The port response is in red.</p><p></p><p><img src="https://i.nextmedia.com.au/Utils/ImageResizer.ashx?n=https%3A%2F%2Fi.nextmedia.com.au%2FReviews%2FBWGraph3.jpg&c=0" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>The port peaks at around 40Hz, easily covered by the sub. Your sub is flat up to above 100:</p><p></p><p><img src="https://www.audioholics.com/subwoofer-reviews/asw-610xp/asw610xpbasicresponse.jpg/image" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><u><strong>Put the bungs in.</strong></u></p><p></p><p>Set the sub to 100Hz crossover where the 606 starts dipping in it's response. Start with the sub volume at 0 and turn it up until you can hear "where" the sub is, hearing the sub separate breaks imaging, turn it down till it blends back in. If the bass is still not right turn the XO down to 95, repeat with the volume. Again if you can locate the sub repeat at 90 etc etc until you get enough bass level without locating the sub.</p><p></p><p>You may have to compromise either on bass level or imaging, the sharp drop off below 100 on the bookshelves is going to make integrating a bit difficult.</p><p></p><p>That's if you want an accurate response curve, right now you're hearing and liking the reflections from the wall at 40 they're just too strong. Damping behind the speaker will do nothing for this, try with different densities of bung, somewhere between plugged and not plugged. If you go to a fabric shop and ask for "batting", it's the stuff duvets are filled with, you can put more or less in to tune the port.</p></blockquote><p></p>
[QUOTE="ScottulusMaximus, post: 959073, member: 18165"] A 40Hz wave is +- 8m long. Unless you're putting 4m of insulation behind the speaker it will do nothing for the "boom". 606 LF response curve with bungs installed (in blue), it actually smooths the LF extension. The port response is in red. [IMG]https://i.nextmedia.com.au/Utils/ImageResizer.ashx?n=https%3A%2F%2Fi.nextmedia.com.au%2FReviews%2FBWGraph3.jpg&c=0[/IMG] The port peaks at around 40Hz, easily covered by the sub. Your sub is flat up to above 100: [IMG]https://www.audioholics.com/subwoofer-reviews/asw-610xp/asw610xpbasicresponse.jpg/image[/IMG] [u][b]Put the bungs in.[/b][/u] Set the sub to 100Hz crossover where the 606 starts dipping in it's response. Start with the sub volume at 0 and turn it up until you can hear "where" the sub is, hearing the sub separate breaks imaging, turn it down till it blends back in. If the bass is still not right turn the XO down to 95, repeat with the volume. Again if you can locate the sub repeat at 90 etc etc until you get enough bass level without locating the sub. You may have to compromise either on bass level or imaging, the sharp drop off below 100 on the bookshelves is going to make integrating a bit difficult. That's if you want an accurate response curve, right now you're hearing and liking the reflections from the wall at 40 they're just too strong. Damping behind the speaker will do nothing for this, try with different densities of bung, somewhere between plugged and not plugged. If you go to a fabric shop and ask for "batting", it's the stuff duvets are filled with, you can put more or less in to tune the port. [/QUOTE]
Insert quotes…
Verification
Post reply
Audio and Video Talk
Acoustics & Room Treatment
Accoustic treatment behind rear ported bookshelfs
Top