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High Efficiency Speaker Asylum Need speakers that can rock with just one watt? You found da place. |
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High Efficiency Speaker Asylum Need speakers that can rock with just one watt? You found da place. |
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In Reply to: Yo! Thank you Brother! posted by Ian L on June 24, 2007 at 20:39:30:
"Bill put forward the possibility that the 604 HF driver's magnet could be giving some support to the LF motor". - Impossible!: They are two separate structures, not a combined unit like Tannoy, Stephens, Stromberg-Carlson utilize in their coaxes. If you want to use a 604 as a bass driver only, remove the HF back cover, diaphagm and horn with its surrounding felt (it will leave a scar that does not affect performance) and install an unvented four inch dust cover. The vent in the dust dome used by Altec on their LF units constitutes a front to back air-leak. By implementing this suggestion (which I have done with a pile of 604E drivers for 4 x 15 cabinets) the venting is through the magnet assembly instead of through the dome. I removed the HF plate, pole piece with phasing plug and magnet also). Forget about the 3" bullet and don't even think of calling it a phase plug at such low frequencies which it can never be. It would serve as a cavity filler and would mount via the two tapped holes in the LF pole piece to mount the HF horn. Good luck!
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