I wish to integrate loudspeakers into my well filled library/living room. The loudspeakers will be part of the book collection and sitting level with books and 33cm from a back wall.
Hey this is a real bookshelf scenario with real books as the extended baffle, and not some kind of arrangement that "needs a stand".
I like to think think I can forget about baffle step correction here?
I am also thinking about using Dayton RS 150P-8A together with SEAS 27TDFC H1189-06
Really love the transmissionlines I have heard, but the proximity to the wall worries me. Perhaps a sealed or BR arrangement is better?
Any ideas are welcome. I do like to point out the following: I want to stay 2 way, and wish to keep the driver acceleration relatively constant as per (Loudspeaker drive unit cone acceleration - [English]).
This is the reason for drivers above. I also considered the more expensive Peerless/Tymphany DA25 TX00-08.
Any thoughts are welcome!
Hey this is a real bookshelf scenario with real books as the extended baffle, and not some kind of arrangement that "needs a stand".
I like to think think I can forget about baffle step correction here?
I am also thinking about using Dayton RS 150P-8A together with SEAS 27TDFC H1189-06
Really love the transmissionlines I have heard, but the proximity to the wall worries me. Perhaps a sealed or BR arrangement is better?
Any ideas are welcome. I do like to point out the following: I want to stay 2 way, and wish to keep the driver acceleration relatively constant as per (Loudspeaker drive unit cone acceleration - [English]).
This is the reason for drivers above. I also considered the more expensive Peerless/Tymphany DA25 TX00-08.
Any thoughts are welcome!
Proximity to the wall? After describing that it will be shrouded in books can you explain what this means..
The front of the loudspeaker will be level (more or less) with the books sitting on the shelf.
It is not just one shelf, above and below will also be multiple shelves with books at the same level. Horizontally it is mostly flat. Vertically it is also flat, but with voids that are 33cm deep to the back wall.
The room is more complex than that, but I wish to integrate my speakers into a typical "lundia bookshelf".
Kind regards,
Eric
It is not just one shelf, above and below will also be multiple shelves with books at the same level. Horizontally it is mostly flat. Vertically it is also flat, but with voids that are 33cm deep to the back wall.
The room is more complex than that, but I wish to integrate my speakers into a typical "lundia bookshelf".
Kind regards,
Eric
Ok, I'd expect you to do something about the voids closest to the box. Also, I'd probably choose a closed box.
But what is it that worries you about the wall? If the shelf is large enough then the wall becomes less of a concern.
But what is it that worries you about the wall? If the shelf is large enough then the wall becomes less of a concern.
I suspect vibrations from the books will compromise any speaker. The modest cost Jeff Bagby designed "Tributes" speakers should meet your goals. The port can be located in a front corner.
https://meniscus.lightningbasehosted.com/wp-content/uploads/2015/11/Tributes-Write-Up.pdf
"The loudspeakers will be part of the book collection and sitting level with books and 33cm from a back wall."
== YES Mid-Tweeter motor delay correction is still required.
== NO Cabinet baffle step correction is not required
https://meniscus.lightningbasehosted.com/wp-content/uploads/2015/11/Tributes-Write-Up.pdf
"The loudspeakers will be part of the book collection and sitting level with books and 33cm from a back wall."
== YES Mid-Tweeter motor delay correction is still required.
== NO Cabinet baffle step correction is not required
Thanks For the interesting and helpfull replies.
What worries me about the proximity to the wall is elevation of low frequencies if I would choose a transmissionline design. The reason I would like to use a T-line is to deepen the lows, not make them louder. Would a front-ported T-Line be acceptable at all?
I do understand your advice for using a sealed speaker, But I do like deep lows as I listen to classical music.
I will read into Mid-tweeter motor delay correction in crossovers. Thanks!
What worries me about the proximity to the wall is elevation of low frequencies if I would choose a transmissionline design. The reason I would like to use a T-line is to deepen the lows, not make them louder. Would a front-ported T-Line be acceptable at all?
I do understand your advice for using a sealed speaker, But I do like deep lows as I listen to classical music.
I will read into Mid-tweeter motor delay correction in crossovers. Thanks!
That wall support is likely a good thing as the upper bass is also supported by the wall so it stays with the port output.
I did some more reading into this and came to some conclusions:
The Fs of proposed driver is too high, and the Qts of this driver is too low to get easy results with a transmissionline.
Also I have discovered The SEAS Mimir Kit speaker. This kit has a very similar acceleration rate of both drivers, and also a very fast one, which is what I'm after.
Thanks for the "tribute" mail: I really enjoyed the series crossover part (which I adhere to), but have dismissed this design, because I really want to focus on matching (as fast as possible) driver acceleration. The tributes are optimised in a different way. Insightfull nonetheless! Thanks!
Do I need to start a new thread on optimising the SEAS MIMIR design for my situation, or shall we continue here?
I am feeling a reduction/removal in/off baffle step compensation for the filter, and moving the port to the front. New question: Could I keep port area and length similar if it would be a slot at the bottom of the enclosure?
The Fs of proposed driver is too high, and the Qts of this driver is too low to get easy results with a transmissionline.
Also I have discovered The SEAS Mimir Kit speaker. This kit has a very similar acceleration rate of both drivers, and also a very fast one, which is what I'm after.
Thanks for the "tribute" mail: I really enjoyed the series crossover part (which I adhere to), but have dismissed this design, because I really want to focus on matching (as fast as possible) driver acceleration. The tributes are optimised in a different way. Insightfull nonetheless! Thanks!
Do I need to start a new thread on optimising the SEAS MIMIR design for my situation, or shall we continue here?
I am feeling a reduction/removal in/off baffle step compensation for the filter, and moving the port to the front. New question: Could I keep port area and length similar if it would be a slot at the bottom of the enclosure?
Here is an example of a small 2 way TL using SEAS drivers designed to work flat against a wall. The increased level of bass due to the front wall is accounted for in the design and is a benefit not a problem. Of course bass will be lacking if the speaker is pulled out into the room.
TL are physically large, costly and fairly tricky to get right. Compared to a sealed speaker they can have increased bass due to the additional output from the port. Compared to a ported 2 way speaker they avoid issues with port resonances and midrange leakage which is made worse if the port has to be on the front which it would in your case. For most the disadvantages of TLs such as size, cost and complexity outweigh the advantages.