Just thought I would post a few pics on the Hartsfield toploader project that has been going on in my life for years now.
Its still slowly coming together.
Just thought I would post a few pics on the Hartsfield toploader project that has been going on in my life for years now.
Its still slowly coming together.
Very Nice!! So how many years you have left on it or are you getting close??
Rob
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
JBL Pro for home use!
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
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.
I might be deaf, but I can still hear da bells! (Quasimodo)
.... Oh, and the Kick Drum.
Yes a long project, your first post was over two years ago>
FYI: currently on eBay.
http://cgi.ebay.com/Early-JBL-Hartsf...item2c589444f8
If you can remain calm in a crises, you don't understand the situation!
They are beautiful.
Well done sir. You copied a '54 I see.
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