Grill Cloth on my Cornwall

  • Thread starter Thread starter Squishman
  • Start date Start date
Squishman

Squishman

Audioholic Samurai
Jul 1, 2017
2,568
0
38
66
Yesterday, I attached grill cloth to the grill card for my Klipsch Cornwall speaker. I hadn't even noticed until yesterday that someone had chopped off the port section of the grill. That's ok. It was straight and looks pretty good that way. Good thing I painted inside the ports earlier. Also attached a period-correct badge that a guy on the Vintage Klipsch Fans page sent to me at no charge months ago. Also, good thing I don't have cats. I took all day to do it. Gluing and clamping one edge at a time. Thats a pine strip on the front on the riser. It was a little banged up on the edges, so I attached that.
 

Attachments

  • 380149871_10226327246339795_2954740035463413298_n.jpg
    380149871_10226327246339795_2954740035463413298_n.jpg
    79.1 KB · Views: 432
  • 379185152_10226327247539825_382102930211916156_n.jpg
    379185152_10226327247539825_382102930211916156_n.jpg
    615.1 KB · Views: 465
  • 379993534_10226327246859808_6347686087098854266_n.jpg
    379993534_10226327246859808_6347686087098854266_n.jpg
    499.3 KB · Views: 424
  • 379999658_10226327248059838_2851668098204157564_n.jpg
    379999658_10226327248059838_2851668098204157564_n.jpg
    590.9 KB · Views: 446
Only one guy thinks this looks good. Hmm. Ok two. Gotta count myself :)
 
Probably the way they are supposed to be, so as not to cause port resistance.
Reading this again, I am having trouble discerning which way you are going with your reply. Whether you think the ports should be covered or not. Not that I will change it. I like it this way.
Edit: I think I get it now. But photos of this era of CW's show a full grill.
 
Last edited:
Reading this again, I am having trouble discerning which way you are going with your reply. Whether you think the ports should be covered or not. Not that I will change it. I like it this way.
Edit: I think I get it now. But photos of this era of CW's show a full grill.

In that case probably someone modified it, to reduce port resistance. If there is high output bass then there will be a lot of airflow from the ports.
In a tuned enclosure, at tuning most of the sound comes from the port and not the speaker cone.

These are the ports on my bass lines. I used and open mesh metal grill each side. If you play an LT tone at power it will blow out a lighter.

Picture%20062-X3.jpg


This is the port of my in wall TL. It is the white grill to the left of the lower power amp.

IMG_1300-X2.jpg


The vent air velocity of a tuned reflex enclosure is of the order of 20 m/sec. That is a lot of air movement.

Back in the 50s before Thiele/Small, Gilbert Briggs in his books on DIY speakers, suggested tuning enclosures by playing a low tone and setting the port parameters by if it would blow out a candle! Yes, I followed that advice many years ago. Trouble is the first time I tried it, I had damped the speaker with cotton wool and the candle set it alight!
 
  • Like
Reactions: Squishman
In that case probably someone modified it, to reduce port resistance. If there is high output bass then there will be a lot of airflow from the ports.
In a tuned enclosure, at tuning most of the sound comes from the port and not the speaker cone.

These are the ports on my bass lines. I used and open mesh metal grill each side. If you play an LT tone at power it will blow out a lighter.

Picture%20062-X3.jpg


This is the port of my in wall TL. It is the white grill to the left of the lower power amp.

IMG_1300-X2.jpg


The vent air velocity of a tuned reflex enclosure is of the order of 20 m/sec. That is a lot of air movement.

Back in the 50s before Thiele/Small, Gilbert Briggs in his books on DIY speakers, suggested tuning enclosures by playing a low tone and setting the port parameters by if it would blow out a candle! Yes, I followed that advice many years ago. Trouble is the first time I tried it, I had damped the speaker with cotton wool and the candle set it alight!
I'll have to check if I have that kind of air movement. I did change the woofer to a supposedly more powerful Crites, so that alone changed the engineering of the speaker.
 
newsletter

  • RBHsound.com
  • BlueJeansCable.com
  • SVS Sound Subwoofers
  • Experience the Martin Logan Montis