PL-89 tower speakers & Klipsch RB-81 II bookshelfs as sealed

dreadknot

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Preamp, Processor or Receiver
outlaw audio 976 7.2 balanced receviver
Main Amp
Crown xli 800 xls 1502
Additional Amp
Crown xli 800 , Crown xli 800
Other Amp
crown xls 1502
Universal / Blu-ray / CD Player
nvidia shield (2017 model)
Front Speakers
PL-89
Center Channel Speaker
PL-28II (for sale)
Surround Speakers
Klipsch RB-81 (sold)
Surround Back Speakers
Klipsch RB-81
Front Height Speakers
none
Rear Height Speakers
none
Subwoofers
none at the moment
Other Speakers or Equipment
none
Video Display Device
none
Screen
Vizio M55-E0 (2017 model) upgrading to tcl 55in
Remote Control
none
Streaming Equipment
none
Streaming Subscriptions
none
Satellite System
none
Other Equipment
none
would pluging the ports on my pair of PL-89 tower speakers an the ports on my Klipsch RB-81 II
with some custom cut thick rubber to sort of make them sealed be ok or would it completly suck im feeding each of them 200watts from a xli 800 ?
iv got a parometric eq to use for room correction
 

Sonnie

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RTJ 410
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MartinLogan Focus C-18
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JTR Neosis 110HT
Surround Speakers
JTR Neosis 210RT
Surround Back Speakers
JTR Neosis 210RT
Front Height Speakers
JTR Neosis 110HT-SL
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JTR Neosis 110HT-SL
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JTR Captivator 2400 x6
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Zero Surge 8R15W-1 | Salamander Synergy Equipment Stand
I would test them and see... measure the speaker with REW and look at the response both ways to see if plugging them helps. Then listen each way to make sure they are not restricted (over driven) at lower frequencies at the volume you prefer.
 

dreadknot

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Jan 31, 2020
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Preamp, Processor or Receiver
outlaw audio 976 7.2 balanced receviver
Main Amp
Crown xli 800 xls 1502
Additional Amp
Crown xli 800 , Crown xli 800
Other Amp
crown xls 1502
Universal / Blu-ray / CD Player
nvidia shield (2017 model)
Front Speakers
PL-89
Center Channel Speaker
PL-28II (for sale)
Surround Speakers
Klipsch RB-81 (sold)
Surround Back Speakers
Klipsch RB-81
Front Height Speakers
none
Rear Height Speakers
none
Subwoofers
none at the moment
Other Speakers or Equipment
none
Video Display Device
none
Screen
Vizio M55-E0 (2017 model) upgrading to tcl 55in
Remote Control
none
Streaming Equipment
none
Streaming Subscriptions
none
Satellite System
none
Other Equipment
none
i did that once ports unplugged of course an the response that rew got showed the room correction need more peq adjustment the my receiver had or could do especially an the option to set the software to match my 10 band parametric eq so getting it to show the necessary room corrections base on my eq was doable so i did the best to improvise to smooth out the bass but it was just recently while watching a video on subs with plug for port option configs like hsu an svs i thought made pluging my ports might help

that said what would you suggest to test with a big wad of cotton or some waded socks
 

Sonnie

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Preamp, Processor or Receiver
StormAudio ISP Elite 24 MK3 Processor
Main Amp
McIntosh MC1.25KW Monoblock Amps
Additional Amp
StormAudio PA 16 MK3
Computer Audio
Intel NUC w/ Roon ROCK
Universal / Blu-ray / CD Player
Panasonic UB9000 4K UHD Player (for media discs)
Front Speakers
RTJ 410
Center Channel Speaker
MartinLogan Focus C-18
Front Wide Speakers
JTR Neosis 110HT
Surround Speakers
JTR Neosis 210RT
Surround Back Speakers
JTR Neosis 210RT
Front Height Speakers
JTR Neosis 110HT-SL
Rear Height Speakers
JTR Neosis 110HT-SL
Subwoofers
JTR Captivator 2400 x6
Other Speakers or Equipment
VTI Amp Stands for the Monoblocks
Video Display Device
Sony 98X90L
Remote Control
Universal MX-890
Streaming Equipment
FireCube for movies and Lenova Carbon X1 for Roon
Streaming Subscriptions
Lifetime Roon Subscription
Tidal
qobuz
Netflix
Amazon Prime
Satellite System
Dish Joey 4K
Other Equipment
Zero Surge 8R15W-1 | Salamander Synergy Equipment Stand
Foam is the best thing to use, but a bunch of socks might work well enough to measure.
 

dreadknot

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Thread Starter
Joined
Jan 31, 2020
Messages
53
More  
Preamp, Processor or Receiver
outlaw audio 976 7.2 balanced receviver
Main Amp
Crown xli 800 xls 1502
Additional Amp
Crown xli 800 , Crown xli 800
Other Amp
crown xls 1502
Universal / Blu-ray / CD Player
nvidia shield (2017 model)
Front Speakers
PL-89
Center Channel Speaker
PL-28II (for sale)
Surround Speakers
Klipsch RB-81 (sold)
Surround Back Speakers
Klipsch RB-81
Front Height Speakers
none
Rear Height Speakers
none
Subwoofers
none at the moment
Other Speakers or Equipment
none
Video Display Device
none
Screen
Vizio M55-E0 (2017 model) upgrading to tcl 55in
Remote Control
none
Streaming Equipment
none
Streaming Subscriptions
none
Satellite System
none
Other Equipment
none

Juan Font

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Jan 6, 2018
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Preamp, Processor or Receiver
Pure Music 3.0.9c MacOS, Schiit Bifrost 4490 + SYS
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Rotel RB-1572
Front Speakers
B&W 683S2
You will get less total bass, but more extension (2nd order high-pass instead of 4th order) and less distortion (ports tend to generate strong even-order harmonics), at least at lower levels until the onset of woofer excursion limits. You will probably also get rid of some mid-bass colorations (the Reflex port duct's acoustic low-pass filter is not very effective at higher frequencies, allowing part of the woofer's rear radiation at mid-frequencies to escape thru the port).

I would strongly recommend plugging the ports on main speakers when using separate subwoofers. The smoother bass roll-off and the cleaner bass and midrange should merge much better with the subs.

I am currently using my front-ported B&W 683s2's with the supplied foam port plugs and I like them better, even though I don't have a subwoofer.
 

dreadknot

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Supporter
Thread Starter
Joined
Jan 31, 2020
Messages
53
More  
Preamp, Processor or Receiver
outlaw audio 976 7.2 balanced receviver
Main Amp
Crown xli 800 xls 1502
Additional Amp
Crown xli 800 , Crown xli 800
Other Amp
crown xls 1502
Universal / Blu-ray / CD Player
nvidia shield (2017 model)
Front Speakers
PL-89
Center Channel Speaker
PL-28II (for sale)
Surround Speakers
Klipsch RB-81 (sold)
Surround Back Speakers
Klipsch RB-81
Front Height Speakers
none
Rear Height Speakers
none
Subwoofers
none at the moment
Other Speakers or Equipment
none
Video Display Device
none
Screen
Vizio M55-E0 (2017 model) upgrading to tcl 55in
Remote Control
none
Streaming Equipment
none
Streaming Subscriptions
none
Satellite System
none
Other Equipment
none
You will get less total bass, but more extension (2nd order high-pass instead of 4th order) and less distortion (ports tend to generate strong even-order harmonics), at least at lower levels until the onset of woofer excursion limits. You will probably also get rid of some mid-bass colorations (the Reflex port duct's acoustic low-pass filter is not very effective at higher frequencies, allowing part of the woofer's rear radiation at mid-frequencies to escape thru the port).

I would strongly recommend plugging the ports on main speakers when using separate subwoofers. The smoother bass roll-off and the cleaner bass and midrange should merge much better with the subs.

I am currently using my front-ported B&W 683s2's with the supplied foam port plugs and I like them better, even though I don't have a subwoofer.
sounds like a good idea to try what would be best for pluging to ports
 
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