KLH Model One(s) and Janszen 1-30(s)

Yes the janzens were sold with the KLH model ones and ment to sit ubove the front baffle in the enclosures.I looked for many yrs for a pair of the klh1s as I sourced the janszens first.They are relatively ineffiecent compared to later bass reflex designs but remember they were produced around 1960 and all there was at the time was tube amps available.
The woofers in there will be rated at or around 30 wpc.Doesnt mean you cant feed them 100 wpc as long as your moderate with you volume pot.
It would be a shame to over drive those components as the chance of finding replacements would be slim to none.
Use them as intended.Get yourself a vintage HHscott,fisher,dynaco ect stereo tube amp of 15-40 wpc and call it a day that's what id do.I run 1958 era full range and co-axial speakers and with tubes they are extremely accurate and will fill a large room with sonic bliss.The x-overs will need recapping for sure..

hunter
I built an Eico 2080 and ran University Diffusicones (12" I think) for a long time.
It was indeed a ton of great sound.
 
Pulled one of the 10-1/2 lb woofers tonight to peek under its skirt.
Fairly standard bits- cast frame, though it completely surrounds the
magnet. It does indeed look like it needs surround sealer- badly.
The surround is bright because of the light on the front side. It also
looks like sealer was used in the center of the cone and that it's
cracking/peeling a little. Won't hurt to reapply here, too, I guess.

I'm not sure if I mentioned some early production cues- the screw
holes vary some, and some of the screws are in at an angle- T-nuts
and all. I think the box was laid on its back, holes were drilled, nuts
installed and the speaker screwed down. The other box mount is
precise.

front.jpg

center.jpg

back.jpg

surround.jpg

skirt.jpg

meter.jpg
 
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Tryna decide what method for stripping the finish. I hit a small spot
with some heat tonight and instantly filled the basement and garage
with toxic smog. Duh. So I wait until spring or do it outside (~40°
to 50° days now); use a chemical peel; or sand.

finish1.jpg

finish2.jpg

Also not sure what finish I have.

finish3.jpg
 
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Watching with interest.

The motor structure on those woofers look massive! Do you plan on bracing the cabinet (I'm assuming there isn't any...& I admit to possibly missing a few post since last checking in).

What do you plan on using to redope the surrounds with?
 
The cabinets already have a wall between the two halves
inside that goes front to back, top to bottom. I suppose I
could add a side-to-side brace, but I'm not sure it would
make much difference. There might even be something
already in there. I just have to pull all the stuffing which
is major sticky.

The sealer surround I'm using is from RoyC.

brace.jpg
 
One thing I'm tempted to do is rewire these so each woofer could
be individually driven.
 
More adventures with a woofer.

Markings on the cone: 27.0 grams, frame 247-3

surround1.jpg

Pressboard, uh, piece around and covering the outside of the spider...

spider2.jpg

6" deep

side2.jpg
 
No further progress lately, there's a Saab 900 in my workspace needing attention.

Trivia pics today: nameplates

The plate from 002 is different, looks like brass, and glossy.
The other one is probably aluminum. Weight in grams.

nameplate1.jpg

nameplate2.jpg weight1.jpg weight2.jpg
 
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Apologize if I missed it - did you look at the Janzen ES panels yet? Curious to see your progress through them, if they don't work.
 
Yes, they don't work. One looks comprehensively fried, the other looks fine but doesn't power up.
 
Broke out the sandpaper tonight... The orbital sander makes
too big a mess, so I'm doing these by hand, unless it takes
until spring to remove the original finish.

The tops on mine are not original, based on one picture I've
seen of another Model One. The other thing is they are veneered
on the front and one side- mirrored sides. Based on the serial
numbers, I don't think these were purchased together. The
black paint on the sides is also not original.

However, it looks like I'll strip at least one, then pull them off
and see what's underneath.

top1_01-27.jpg

side2-01-27.jpg

corner1_01-27.jpg
 
Here's the latest from the same camera angle. I thought I was scraping the finish
off the front edge, but it was/is the actual veneer. Very thin... So I'll need some
13/16" veneer when I start to wrap these up.

front6.JPG
 
Tiny progress today, starting the sand-down after the big finish scrape-off.
(the second cabinet)

Very red, except for the front edge. I have a swivel top TV table from
the same approximate era with the same finish.

corner_659_4-16-18.jpg

top_659_4-16-18.jpg

side_659_4-18-16.jpg
 
Got #659 sanded and started oiling it. Beautiful red hue, though nothing pulls
out the imperfections like a camera flash.

sanded1.jpg

sanded2.jpg

oil1.jpg

oil2.jpg

oil3.jpg
 
Mahogany. Awesome thread.
Thank you!

Listened to them a while the other night, and they're just so stout all the way to the
lowest ranges. I've got some old Stromberg mids and tweets (baffle boards in the
first picture) that I've adapted. I may make this semi-permanent, until I rebuild the
1-30s. Sourced power supplies for them- a particular electric fence charger provides
the 1kv necessary.

I think this is about the 7th or 8th coat of oil. V e r y slow to soak in. I really like the
color. A few nicks but I'm leavin' it for now. Sealed the surrounds, and it definitely
slowed the cone rebound.

Some flat streaks in the finish on top that simply will not shine (top center in bottom
picture). Suggestions of a top coat, oil/poly mix? like arm-r-seal. I'd rather not go
poly, but I can't get the blotches out.

front_5-6-16_sc.jpg

corner_5-6-16_sc.jpg
 
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