Electrovoice 18" Woofer: smallish Magnet; only 2.3 ohms?
Vintage Electro-Voice Info, click on any individual image http://www.hifilit.com/hifilit/Electro-Voice/Electro-Voice.htm says the K versions were 3.2 ohms, "for Klipsch K Type Baffles" |
OK, it's a 18WS, used in both the Model EV-Six (4 way, 8 ohm system) 5 position resistor based optional frequency curves https://products.electrovoice.com/binary/E-V%20Six%20EDS.pdf and Royal 400 (3 way, 2 AT-37 L-Pads, 8 ohm system) https://products.electrovoice.com/binary/Royal%20400%20Manual.pdf "a Special Woofer, 18WS, 4lb 10oz Ceramic Magnet" I like learning this stuff, thanks for the help. That pair of Model EV-Six's is only 1 hour from my house which is why this stays in my unconscious. |
What do want to know? In your first post and again 07-18-2021 10:10am: you asked about a nominal speaker spec (8 Ohm) vs a DC spec. Again: if your 18" woofers came out of either EV Six or 400 systems: an amplifier's outputs will see a nominal impedance of 8 Ohms, playing music into them. Why are you concerned about EV's magnet structures and materials, specifically? Are you going to horn load your 18" driver? That's the only case in which you should concern yourself, as regards any K Series, EV driver. They were designed only for horn-loaded output and a very limited, rear enclosure volume, which controls/restricts their cone motion/excursion. ie: Note how narrow the aperture is, in the woofer mounting baffle of the following corner horn. http://wp.volvotreter.de/projects/khorn/ |
rodman I seek active discouragement, knowledge always a push/pull, experience from others here 'smartly sought'. from the temptation of a pair of Model EV-Six's only 1hr, 20 minutes away. https://www.ebay.com/itm/154513478054 I was thinking of building new enclosures for them that would replace my existing 'all electro-voice' speakers shown here (drivers from a 1958 Fisher President II that was my uncle's) https://systems.audiogon.com/systems/9511 give the current ones to my Son; sell the old; or use for a while, then sell the 'new' ones. I'm drawn to both the bigger 18" woofer (I have 15W now), but also the very rare resistor based network they use for 5 optional response curves. (Royal 400, 3 way, uses L-Pads) Also, the Model EV-Six is 8 ohm (I understand nominal). That would let me move to a tube amp with external bias meters (my existing speakers are 16 ohm nominal, the version one Cayin A88T has 16 ohm taps, internal bias adjusters). Or should I say, WAS drawn. I cannot find any info about re-coning those 18WS woofers, so that's that. This 18WS now seems a lightweight comparatively. I recently installed new 16 ohm L-Pads, hard to match L to R, took me a few weeks, but the match to my room is probably better than one of the E-V Six's fixed response curves anyway. No, no way, but .... |
