The o-port will make any guitar from beginner to custom-sound richer, fuller, and louder, with more clarity and better projection. the o-port material is custom blended for flexibility to prevent damage to your guitar finish and inlays. your o-port will suppress feedback and give your acoustic or acoustic electric guitar a fuller sound with more volume, better clarity and enhanced projection. available in two sizes:large nbsp; size – fits 3.875 inches – 4 inches (9.843 cm – 10.16 cm) small size ndash; fits 3.375 inches – 3.5 inches (8.573 cm – 8.89 cm)
$ 9.99
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13 of 13 people found the following review helpful
 Planet Waves PW-OPKL, By
Verified Purchase(What’s this?)
This review is from: Planet Waves O-Port Sound Enhancement for Acoustic Guitar, Large, Black (Electronics)
Planet Waves O-Port comes in two sizes – Small and Large and in two colours Ivory (White) or Black. Amazon does not say that in the product description. I believe that the abbreviations “PW-OPBKL” means “Planet Waves – OPort Black Large”. The “Large” size would fit the Acoustic guitars.
I tried the O Port on my Taylor 714CE Grand Auditorium Acoustic Guitar and and could not distinguish any difference. However, there is a clear positive difference when I use it in my Maton EBG-808 Acoustic Guitar especially in the bass strings. However, I could not differentiate the response in the trebles in the Maton Guitar. I also bought the Small size O Port which fits the Classical Guitar. Again there was an distinct improvement in the bass strings. 0
9 of 9 people found the following review helpful
 Amazing what a piece plastic can do, By
Amazon Customer (Doylestown, PA) – See all my reviews
This review is from: Planet Waves O-Port Sound Enhancement for Acoustic Guitar, Small, Black (Electronics)
It definitely changes the sound of my Classical Guitar for the better (Pavan TP-30). It allows the the bass notes to have distinct upper note harmonics/partials and it takes away the boominess of the fundamental. My initial thought was that it did away with the “blurriness” of the low bass to mid-range response and balanced the entire spectrum of the guitar’s range. Amazing what a piece plastic can do. Highly recommended.
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10 of 11 people found the following review helpful
Truly awesome sound!, By
This review is from: Planet Waves O-Port Sound Enhancement for Acoustic Guitar, Large, Black (Electronics)
Yeah, I know, we all read these reviews and take them with a grain of salt. But truly, I was blown away by the change the O-Port made to my Alvarez AD60Ck. The difference to the guitar’s tone and presence characteristics truly is amazing. After installing the O-Port I was playing for some regular listeners, and they asked if this was a different guitar. Same guitar, but now with a much improved sound. We all know how hard it is with an acoustic instrument to get any real tonal presence outdoors. I took my Alvarez with it’s O-Port out on a weekend sailing trip, and was amazed by the tone and ability to project sound in an open setting. I tried the O-Port on an expensive, show guitar, my Blueridge BR180CE. It really didn’t make a noticeable change to the Blueridge’s sound, so apparently the O-Port won’t improve upon a guitar that already has perfect tone. But if you want the sound of a ,000 guitar from a 0 instrument, the O-Port is just the ticket.
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