OB H-Frame / A370PEQ / HX800 amp Box Flat Packs

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Captainhemo

Re: OB H-Frame Flat Packs
« Reply #240 on: 26 Jan 2017, 04:48 pm »
Now that I look more closely it looks like the outside verticals are rounded?

On the tineo pair pictured above, yes , the front  outside vertical edges are  rounedover.  Some guys want them this way, some don't,  this particular cutomer wanted  them rounded on the fron, not on the back to match his existing speakers.
If you go back  to page 5, post 86,  there is pair we sent to Ron at New Record Day  which  he finished  in hickory with no roundovers.

jay

jimbones

Re: OB H-Frame Flat Packs
« Reply #241 on: 1 Feb 2017, 03:20 pm »
I guess if the amp is flipped horizontally, cooling fins inside and controls close to the rear it might work on W frame.



Mireti, I may building something like yours, W Frame with Amp in drawer on Bottom. I cleared it with Danny and he thinks I will be fine. Vibration and heat are of no concern. Yay! Lol.

mirekti

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Re: OB H-Frame Flat Packs
« Reply #242 on: 1 Feb 2017, 03:40 pm »
Mireti, I may building something like yours, W Frame with Amp in drawer on Bottom. I cleared it with Danny and he thinks I will be fine. Vibration and heat are of no concern. Yay! Lol.

Thank you Jim, but I was a little bit impatient and ordered two RELs T-Zero on Sunday. They should be delivered today.
I will see if these two will work for me, if not I will get back to you.
Also, I am quite sure there could be others who would like the amp inside, but not so sure about the drawer. I mean, something could rattle. Wouldn't a fixed double/tripple sized and cut out bottom for the amp be a better solution?

jimbones

Re: OB H-Frame Flat Packs
« Reply #243 on: 1 Feb 2017, 04:10 pm »
I used the term "drawer" loosely (don't mind the pun) :) Of course I will have to build it like a Brick S House or such that there are no rattles. I don't think that will be too hard. You are right, it takes time. I happen to be in no rush. I am hoping to get this done by mid summer. That gives me a few  months. I have a local shop that will cut all the wood to spec so it will be delivered as a flat pack. I have a shop and can do it myself but I think it will go faster If I sub that out. I'll do the assembly. REL's are supposed to be good. I don't know how they compare to GR OB's. I was sold on the OB woofers.

bdp24

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Re: OB H-Frame Flat Packs
« Reply #244 on: 1 Feb 2017, 05:51 pm »
REL has a great reputation amongst advanced audiophiles, but they can't be considered in the same category as the OB/Dipole Sub. REL's, the Rythmik F12G, and other excellent sealed box subs are a completely different animal than the GR Research/Rythmik Open Baffle/Dipole Sub. Completely different in design, sound, and acoustic behavior, in the same way a Dipole speaker is completely different from a box speaker. Their dipole operation and figure-of-8 radiation pattern, where they need to be placed in the room, how they integrate with a loudspeaker, their maximum output capability, their lack of a resonant box, their characteristic sound--- "leaner", cleaner, etc. all different from any and all box subs, whether sealed or ported.

I liken the difference between box subs and the OB/Dipole as the difference between an acoustic/stand-up bass and an electric. The electric is rounder, fuller, fatter, the acoustic quicker, more snap and attack, less overhang and plumpness. The OB/Dipole is THE sub for ESL's, Magnetic-Planars, Ribbons, and other highly transparent loudspeakers.

Captainhemo

Re: OB H-Frame / A370PEQ / HX800 amp Box Flat Packs
« Reply #245 on: 16 Feb 2017, 11:26 pm »
that sloped set of uals  I posted pics of   a while back is  finally  nearing the finish line.

Here's a couple shots of   them after  a few coats of epoxy and some block sanding




Our painter is busy so they've been in the shop for  quite some time but great results.  Here's one in the booth


Another before final polishing


Picked one up this afternoon and popped the grill in place




Had to use some little knobs  so the grills  could be easilly removed


Some good light to show the finish


Bably blue amp boxes



Now to  box and ship    8)

jay
« Last Edit: 17 Feb 2017, 05:06 am by Captainhemo »

ebag4

Re: OB H-Frame / A370PEQ / HX800 amp Box Flat Packs
« Reply #246 on: 16 Feb 2017, 11:43 pm »
Very nice Jay!  What is the purpose of the epoxy on the raw MDF?  Is it used to seal the edges of the MDF?

Best,
Ed

mlundy57

Re: OB H-Frame / A370PEQ / HX800 amp Box Flat Packs
« Reply #247 on: 17 Feb 2017, 12:27 am »
Ed,

It does a very good job of both sealing the MDF so no seams will show through and it strenthens the MDF a lot.

Mike

Captainhemo

Re: OB H-Frame / A370PEQ / HX800 amp Box Flat Packs
« Reply #248 on: 17 Feb 2017, 05:12 am »
Ed,  just as Mike  said.  The epixy really  encapsulates the   MDF cabinet.
we rolled this stuff and then blocked it ,  in the futre, it will likely be sprayed  as our painter has been doing some of this.   

jay

Folsom

Re: OB H-Frame / A370PEQ / HX800 amp Box Flat Packs
« Reply #249 on: 17 Feb 2017, 05:45 am »
Looking good Captain.

Those amp boxes look like aluminum, at least on my cellphone. Cool idea.

Captainhemo

Re: OB H-Frame / A370PEQ / HX800 amp Box Flat Packs
« Reply #250 on: 4 Mar 2017, 01:35 am »
A coule more of the  Apple wood  subs. This is the pair that had some veneer issues   and we ended up keeping for  in home  demos.  They sat in Don's garage all winter, when we pulled them out, the lacquer had all cracked  :cry: 
Went to work on them ,   sanded them down with a block,  re lacquered with a flat lacquer this time and fitted them out with  drivers, no-rez, and  grills.






jay


jay

Jonathon Janusz

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Re: OB H-Frame / A370PEQ / HX800 amp Box Flat Packs
« Reply #251 on: 4 Mar 2017, 03:14 am »
For b-stock "demos", those apple wood look really nice!  That might be one of the first of these OB subs that I could easily mistake for being an ordinary boxed speaker with the grills on.  I like the grain on that veneer too, and I think that the satin finish adds to the "natural" look.  It should be really easy to blend those in with the rest of the furniture in a room.  :thumb:

bdp24

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Re: OB H-Frame / A370PEQ / HX800 amp Box Flat Packs
« Reply #252 on: 4 Mar 2017, 11:02 pm »
A coule more of the  Apple wood  subs. This is the pair that had some veneer issues   and we ended up keeping for  in home  demos.  They sat in Don's garage all winter, when we pulled them out, the lacquer had all cracked  :cry: 
Went to work on them ,   sanded them down with a block,  re lacquered with a flat lacquer this time and fitted them out with  drivers, no-rez, and  grills.






jay


jay

Fantastic Jay! With the inset grill, it really does look just like a bookshelf speaker from the 60's, such as the AR 3a.