So that's what happens w/ too many ports.

[Bax Burgess]

In all I cut 5 ports-
3 nickel-sized ports:
center of the lower bout, center of the waist, center of the upper bout
2 oval ports 1" x 1.5":
centered on the forward curve of the upper bout, the other near to the neck, half cutting into the top and half cutting into the side.

I taped over these ports in various arrangements, and judged that with too many open, particularly when both oval ports were open together, the openess/airiness/glow became overly diffuse, washing out the clarity of the guitar.

The guitar's clarity is retained with a limit of 3 ports:
the nickel-sized waist and upper bout, and either one of the oval ports.

How might this configuration transfer to other guitars? I'd better pump the brakes here.

[difalkner]

Can you post some photos?

David

[Bax Burgess]

https://photos.app.goo.gl/6gejPcYHx2VvbouB7

[WaddyT]

The area of the soundhole plus the area of the ports will determine the impact the ports have on the sound. Also, there is some relationship between the distance of the port to the soundhole in the impact it has. Sometimes, if the soundhole is already at it's optimum size, one port will have a negative impact.

[Bax Burgess]

I don't know how these port placements would affect another shape/size, so I'm not going to pursue this, just be happy with knowing what goes on with ports.

[Rapido Eduwardo]

The link to the photo is broken. I hope that the guitar that you cur all those ports on was not too valuable.

[Bax Burgess]

I think that I have corrected it. The sacrificial guitar is a cheapy.

https://photos.app.goo.gl/6gejPcYHx2VvbouB7