Silly guitar construction question.

Started by pauldo, January 17, 2017, 02:36:12 AM

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pauldo

I was in a conversation with a guy who recently purchased a 'custom' Heritage Prospect.  He was trying to explain the difference between a "floating center-block" and a "solid center-block".  But his explanation didn't really extend beyond a tonal difference.


So the question for those who know (and I know you are here) What exactly is a center-block in a hollow body (ES335 type) guitar?

cozmik_cowboy

#1
The Prospect. like the 335 isn't hollow-bodied; it's semi-hollow.  There is a solid block of wood that runs down the center, making the center solid; the neck, p/ups, bridge, tailpiece, and endpin are all mounted into it.  The idea is to give some of the woody richness of an actual hollow-body with the feed-back resistance of a solid.

Peter
"Is not Hypnocracy no other than the aspiration to discover the meaning of Hypnocracy?  Have you heard the one about the yellow dog yet?"
St. Dilbert

"If I could explain it in prose, I wouldn't have had to write the song."
Robt. Hunter

cozmik_cowboy

"Is not Hypnocracy no other than the aspiration to discover the meaning of Hypnocracy?  Have you heard the one about the yellow dog yet?"
St. Dilbert

"If I could explain it in prose, I wouldn't have had to write the song."
Robt. Hunter

adriaan

Peter, sometimes the Club software of its own accord adds html markup tags that mess with the text size of your post. In your case, everything was down to a 2 pt font, which even someone with 20/20 vision will not be able to read. I hope you don't mind ...

pauldo

Thanks Adriaan, it has been many a year since these old eyes were 20/20 . . . .

So a center-block is a pseudo 'neck-thru' on a (semi) hollow body - kinda, sorta in it's own way. ::)

What is the difference between a Floating Center-Block and a Solid Center Block?

cozmik_cowboy

Adriaan - thanks.

Pauldo - Upon further investigation, I appear to have misspoken; while the 335 (345/355/etc) has a solid block as I described above, the Prospect in fact has a floating block.  The difference is that the floating block is not full depth; it runs full length of the top like the solid, but does not touch the back, leaving it free to vibrate more.  I assume this would give a tiny bit more of the woodiness I mentioned in my first post.

Peter
"Is not Hypnocracy no other than the aspiration to discover the meaning of Hypnocracy?  Have you heard the one about the yellow dog yet?"
St. Dilbert

"If I could explain it in prose, I wouldn't have had to write the song."
Robt. Hunter

gtrguy

Yes, they are not meant to emulate a neck-thru, but to control feedback, at least as far as the Gibson ES models are concerned.

keith_h

From my understanding a solid block is thickness width and is glued to both the top and the back of a hollow body guitar. A floating block is not full depth and is only glued to the top. The idea is the back remains independent from the front and will have a more acoustic guitar sound.

edwin

Quote from: cozmik_cowboy on January 17, 2017, 04:26:19 AM
The Prospect. like the 335 isn't hollow-bodied; it's semi-hollow.  There is a solid block of wood that runs down the center, making the center solid; the neck, p/ups, bridge, tailpiece, and endpin are all mounted into it.  The idea is to give some of the woody richness of an actual hollow-body with the feed-back resistance of a solid.

Peter

And feedback resistant it is, much to my dismay. I have a hell of a time getting my Starfire to feedback.

cozmik_cowboy

Quote from: edwin on January 18, 2017, 09:53:44 PM
Quote from: cozmik_cowboy on January 17, 2017, 04:26:19 AM
The Prospect. like the 335 isn't hollow-bodied; it's semi-hollow.  There is a solid block of wood that runs down the center, making the center solid; the neck, p/ups, bridge, tailpiece, and endpin are all mounted into it.  The idea is to give some of the woody richness of an actual hollow-body with the feed-back resistance of a solid.

Peter

And feedback resistant it is, much to my dismay. I have a hell of a time getting my Starfire to feedback.

My Tele actually feeds back easier than my Sheraton.

Peter
"Is not Hypnocracy no other than the aspiration to discover the meaning of Hypnocracy?  Have you heard the one about the yellow dog yet?"
St. Dilbert

"If I could explain it in prose, I wouldn't have had to write the song."
Robt. Hunter

David Houck

Edwin; do low impedance pickups feedback as easily as high impedance pickups?

edwin

Quote from: David Houck on January 19, 2017, 04:09:02 PM
Edwin; do low impedance pickups feedback as easily as high impedance pickups?

I can't tell any difference. I don't see why there would be, as the mechanism is purely physical from amp to string/body, with the pickup design only affecting the frequency response.

I think perhaps I have just been overly cautious about playing at the extreme volumes needed to get the kind of feedback that I'm looking for without using a dirt box. I don't want to blow up my old JBLs!

David Houck

Thanks!  I just asked the google as well, and it didn't report a difference either.