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Speaker Asylum General speaker questions for audio and home theater. |
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Speaker Asylum General speaker questions for audio and home theater. |
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In Reply to: RE: Nice looking Dunlavy type speakers. posted by hahax@verizon.net on January 24, 2017 at 05:54:15:
Anathema?
I knew John Dunlavy for several years, when he was based here in Canberra. I agree with him that way too many Rb speakers have a peak at Fb, and roll-off too quickly for the typical room-gain curve at LF and ELF.
John "respected" the locally made Audiosphere Model 3's and the Model 2's, both of which have a critically-damped QB3 Rb alignment, and so are not boomy. ? Cast, off-white concrete, truncated spheres.
[Being truncated - /) - they have quite a few internal acoustic standing waves instead of just ONE, and thus easily damped with BAF.]
The 2's used a single WR Coral Flat 5. The last few batches having matching paper dust-caps instead of the original chromed metal type, and OEM'd for Audiosphere.
The larger 3's use an 8" frame WR/midwoofer - a Fostex FW202 - that rolls off pretty cleanly -3db @ above 3.3 khz. Plus, a 35mm Fostex fabric dome with: FS trap, 3rd order HP -3db to match plus some upper-mid-> lower-treble eq. each 'cap' is a ladder of polycarb films. They are phase-coherent, but not time-coherent. +/- 3db 35 - 13,500 Hz.
I have two pairs of each. One pair of the 2s now hold dead Corals but _will_ hold a Manger driver each. ? RSNow (as in Microshaft's Win. NT). Or, when I get a round-tuit.
John taught me a lot about antennas, and wave-guides, at least as much as carrying ANPRC radios around on my back-pack frame had already done, a few years before we met.
Warmest
Tim Bailey
Skeptical Measurer & Audio Scrounger
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- Wellll ...... - Timbo in Oz 18:06:44 01/24/17 (0)
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