Just thought I would post a few pics on the Hartsfield toploader project that has been going on in my life for years now. :banghead:
Its still slowly coming together.
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Just thought I would post a few pics on the Hartsfield toploader project that has been going on in my life for years now. :banghead:
Its still slowly coming together.
Very Nice!! So how many years you have left on it or are you getting close??
Rob:applaud:
Most of the time involved has been consumed by the reverse engineering of the original cabinet design.
Since the original plans are long gone its been quite a journey to get the production jig this far which is almost done.
Probably another month or two till the jig (pictured) is compleate and then I can start bangin em out.
I"ll post pics of the first finished pair when compleated.
Oldmics
Very nice! What component lineup are you planning to use. Three-way?
Thanks for sharing with us.
I will be watching this thread as it progresses.
Regards, Ron
Wonderful job........ for the first time i can see and understand the differences between the two models...
Absolutely not the same speakers.. Are you going to compare the sound of this "top loader" and the 1959 model ?
REgards
The reproduction Toploaders will be a two way system loaded with original JBL componets from the original era of Hartsfield production for testing purposes.
I have a buncha original 150-4C speakers,original N 500 crossovers and the 375 "humpback" drivers with wax seals.
While I will not be able to do a side by side comparision and offer test data of the reproduction toploader v/s the coffin back style cabinets,I already know that the Toploader is superior in its bass reproduction.
It will be interesting to hear the differences (if any) between 50+ year old "seasoned" lumber and the new wood.
Lumber choice was a critical decision to duplicate the original cavity resonance.
I have owned many Hartsfields of both styles and in my experience the longer horn path of the Toploaders produced better sounding bass.
Bruno-please note the exponential horn flair mockup trace lines on the sides of the unfinished center cavity in the first picture.It will give a Hartsfield builder such as yourself the rest of the construction picture.
So its a "work in progress" :)
Thanks for the comments,Oldmics
Wow... they really are going to happen!
Congratulations!!!
Widget
Been a lengthy project :blink:
Speaker does load in from under the top horizontal surface
Not very often do you get to see the insides of a work in progress.
Thanx heaps for the pics.
Great workmanship.
BTW, what sort of glue did you use? I was just wondering if you stayed with tradition and used 'hot pot' glue, or something more current? (eg 'white' glue)
.... and if I can ask one more question, what are you finishing off the cabs with? Wax? Shellac? Varnish? or again, something current.
Cheers. :bouncy:
Beautiful work!
Yes a long project, your first post was over two years ago>:blink:
FYI: currently on eBay.
http://cgi.ebay.com/Early-JBL-Hartsf...item2c589444f8
They are beautiful.
Well done sir. You copied a '54 I see. :applaud: