|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
63.155.105.73
In Reply to: RE: RESIST-'ORS' NO MORE!!! posted by Synthsayer on February 08, 2016 at 09:52:41
Don't these tend to make speakers slightly more difficult-to-drive?
Follow Ups:
The autotransformer acts as an impedance multiplier. Guess we need to know what you mean by "more difficult".
Long ago, I remember reading a review of Klipsch Forte speakers. The reviewer stated that, because of the auto-formers used in the crossover, the speakers required an amp with good current delivery - despite the high sensitivity rating of the speaker.
I think there is low hanging fruit that will improve ANY Klipsch or ALTEC speaker, and that is really GOOD internal ( and external ) speaker wiring, from the amp. One can greatly improve transfer efficiency by doing a superb job on wiring.On my ALTEC 515Bs, from the crossover to the driver, I run two runs of Mil Spec 12 AWG ( copper stranded, silver plated, teflon jacket) to EACH terminal, so it is two runs to the woofer positive terminal, and two runs to the woofer negative terminal, effectively 9 AWG, and the music's presentation becomes " a whole new ball game ! "
I would be concerned over the wiring WAY before the difference of an autoformer versus a resistive pad. Get the wire optimized as the priority, and also, I find speaker wire terminations must be VERY TIGHT to transfer energy properly.
Have fun, enjoy.
Jeff Medwin
Edits: 02/13/16
Thank you, Jeff!
I think you may know my old buddy John in Lexington, KY from other forums.
He was telling me about your Fulton Loudspeaker knowledge, I think? I had a pair of them years ago.
re your post:
I removed the pretty banana plugs on some fat 10 ga. AR wire and used bare wire for connecting to amp and speakers.
There is a very noticeable improvement in stereo balance, imaging, and detail.
The amp sounds way better to me, overall.
Thanks again!
"Ad Astra Per Alia Porci", - To the stars on the wings of a pig: John Steinbeck
Hi Jeff.
How do you connect that much wire to the small connector opening on the 515B?
It would be even more difficcult on newer Altec drivers with the pushbutton spring connectors.
Hello Kyle,Right now, I have a Thomas and Betts ( copper, plated with nickle or something looking like that ) 10-12 AWG SPADE lugs, at the speaker terminal end. I can fit ONE of the two spade prongs into the stock 515B terminal's hole, and I tighten it down with final tightening done CAREFULLY tight with a pair of serrated jaw pliers. ONE spade prong fits into the stock terminal !!
There is a HUGE difference on control of the loudpeaker, by my 1.5 Watt Type 45 amp, depending upon how TIGHT I torque my triple 12 AWG speaker cables, to the 515B , at BOTH the crossover side and the amp sides' terminal block ( aircraft terminal strip ) being used.
The nuts " back - off after 30 minutes !! So....
I double-nutted each terminal connection, and yet, the nuts STILL back off and the speaker loses definition and control and the ULTIMATE dynamic contrasting possible, versus me having the nuts SUPER TIGHT with by using a 3/8ths inch ratchet drive.
I have been A-B ing this for three weeks now. Don't have a solution yet. My speaker spade lugs are the N.L.A. XLO brand 1/4 inch spades, very dynamic sounding spade lug !!
At the 515B speaker side, I am THINKING of soldering the double 12 AWG runs to each terminal, DIRECTLY onto the stock metal tab ( on the other end of the terminal connection - inside the basket) while using hemostats, etc as heat sinks - so as not to melt the voice coil wire. This way, I can eliminate the terminal screw-on interface, and have it all soldered. Would tie wrap the double 12s to the basket for strain relief !!
This approach of eliminating the speaker terminal connection / interface works great on the ALTEC 802 high frequency driver I have been told by Dennis Fraker. In all cases, I use Wonder Solder.
Jeff Medwin
Edits: 02/13/16
I have no idea about the effect of multi heavy guage wire but I have experimented with soldering connections and I found that every mechanical connection I replaced with continuous direct wiring and soldered connections improved the detail and sound staging - subjectively.
I don't have anything that would measure that kind of difference but it worked and aside from the inconvenience made a big improvement for me.
Just what I needed to hear Kyle. Appreciated.
Jeff
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: