|
Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
|
|
|
Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
|
In Reply to: Epos speaker crossover posted by basilio89@hotmail.com on July 24, 2012 at 09:49:13:
and hard-wiring the contacts on each side, and on the driver terminals inside the speaker enclosures. That's tweak 1 (one.)Leaves just one set of dry joints at the amplifier's spkr terminals.
The sound - will - have less hash. Caps are a teeny bit piezo-electric, even MF plastic film types, ;-)!
My speakers used a ladder of MFpolycarbonate caps to form each 'capacitor' in the Fs trap and high-pass on the tweeter, in the late 1970s! They were voiced by ear by a listening panel. The laddering allowed tweaking of each enclosure, as did hand-wound air core coils.
I would never contemplate trying to improve on these crossovers, except by redesigning them as a line-level passive or active crossover, each one tweaked to match the drivers. Voicing is a significant factor here.
Taking the xovers out of the their very quiet enclosures - white concrete/pva mix plus galv.steel mesh, cast into spheres - was quite a big improvement.
Tweak 2. Add some sand in zip-lock bags (sealed before you put them in) to the jiffy boxes. Do one side first, to hear the difference, and do keep the amount of sand as equal as possible. Put the bags on the capacitors and on the air-core inductors.
Tweak 3. Buy Deflex (TM) pads for the magnets on the mid-bass (cone) drivers, and if available to size for the tweeter magnets. Lead shot and plasticine is cheaper but can leak linseed oil, which is easily absorbed by timber and all particle-board. Put strips of damping material on the driver frames and on the back plate of the tweeters.
Tweak 4? Only then consider damping the cabinet walls inside, with Deflex panels. Work on one spkr at a time, damp the rear wall first.
You may then need to reduce the mfr's amount of fibre batting inside. If you do one spkr at a time and then compare-listen after each change you'll know when to stop. I'd retain 'some' fibre behind the cone driver in any case.
Take your time.
The speakers should be far less apparent as discrete sources / themselves - other than the actual voices and instruments, which will be clearer.
The spkrs might almost 'disappear' as sources, which is hard to do with standard affordable boxes.
Warmest
Tim Bailey
Skeptical Measurer & Audio Scrounger
Edits: 07/25/12
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Higher ROI from putting the crossover board in plastic jiffy boxes away from the speakers - Timbo in Oz 05:23:27 07/25/12 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2024, Audio Asylum, all rights reserved ]
