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Found a clean pair of JBL D140F's, what should I use them for?

A

Altarofpigs

New Member
Recently had some vintage speakers fall in my lap, a matching pair of 8ohm JBL D140F 15", I believe from the 60's? I'm a guitarist so I'm vaguely familiar, but the genres I play don't really serve these all that well and I'm scared to blow them up hahaha. Some people pointed me in this direction claiming they would work well for hi-fi stereo or SET Amp applications because of how efficient they are. I have NO idea where to start, if it's affordable, or even possible to use them as stereo speakers. Would appreciate any help in either putting these to use.
https://imgur.com/a/NaRId4f
 
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Altarofpigs said:
Recently had some vintage speakers fall in my lap, a matching pair of 8ohm JBL D140F 15", I believe from the 60's? I'm a guitarist so I'm vaguely familiar, but the genres I play don't really serve these all that well and I'm scared to blow them up hahaha. Some people pointed me in this direction claiming they would work well for hi-fi stereo or SET Amp applications because of how efficient they are. I have NO idea where to start, if it's affordable, or even possible to use them as stereo speakers. Would appreciate any help in either putting these to use.
https://imgur.com/a/NaRId4f
Click to expand...

The "F" series JBL speakers will work better for guitar or bass use. The OEM "F" voice coil has a wider air gap than the home audio non-F. A little less efficient. Do you have the Holy Grail blackface Vibroverb or a brownface Pro? That's where the D140F should go. I have a D130F in my brownface. I believe that the D140F has even more air space in the voice coil, for bass use. The 15-inch tone is much different than the 12-inch JBLs. :thumbsup:

Pro_Amp_rear_cover off (small).jpg

Pro_amp_front_Epi SG (small).jpg
 
The thing with the 140-F is there are 2 different cones. both have ribbed cones.
Some like a pair I have, berried in storage, have the Very large Cloth surrounds!
Just like a LE15B. They are the ones that are useful for HiFi vintage speakers.
they are a direct replacement for the 136A's in the L-300's for tighter non Flabby bass.
and go higher to meet the horns. When I build new cabinets for my 4435, X-overs
and horns, I will use them for the Full range woofers, and Foam edge woofers
for the Lower Bass woofers,
Most of the JBL 140 woofers have the small cloth surrounds.
 
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