Can anyone tell me the technical differences between the 3 18inch instrument woofers?
I just recently picked up some of 4695 cabaret cabs. Seller said they were E155 woofers in them.
I ended up with a load of E155, 2 E151 and a single alnico K151! A few of the E155 and I think one E151 will need a recone. The E151 have aluminium dustcaps. One E155 has a ribbed cone so it seems to be a 2240? The K151 was reconed with a E155 kit by JBL some years ago, it sat in a box unused ever since. A shame I only have one as now I have to find another one!
From reading this forum I see some people mention that they are all slightly different woofers. The K151 and E151 seem to share the same basket, just with alnico and ferrite magnets being the difference. The E155 looks like the 2240/2245, and its spoken that they can be reconed as any of the 3.
I'm really looking for info on the K151 and E151. How exactly are they different to the E155? Are they underhung? I can't seem to find any technical info out there.
As for getting them reconed, there are aftermarket E155 kits out there that as far as I can tell use the same software as the JBL NLA kits, and a high quality edge wound voicecoil wound by Precision Econowind. It seems to be the same coil as the 2240/2245. Is the only difference between the 151 and 155 the coil?
Also it seems like all the drivers I have are 8 ohm, but JBL used to offer the K151 as 4 ohm? Still haven't figured out the benefit of 4 vs 8 apart from it using more power. I'm also trying to track down what the K151 was actually used for, most people say organs? I guess in the 70s when they were available there wasn't much that produced real sub frequencies apart from maybe a DBX boom box. I'm looking forward to getting another one so I can have a full alnico house party system!