Mono fullrange speaker DIY sandwich cone and self made whizzer cone.
In a marble box from the stonemason. Due to communication error he made the walls 4cm thick instead of 2cm.
https://www.diyaudio.com/community/threads/rcf-21-woofer-lf21n451.405626/post-7510921
https://www.diyaudio.com/community/threads/how-to-make-a-whizzer-cone.398063/
https://www.diyaudio.com/community/...loudspeaker-sandwich-cone.402917/post-7443476
It's for Bluetooth music for smartfone use. Think about driving it with a current driven amplifier with LM1875
In a marble box from the stonemason. Due to communication error he made the walls 4cm thick instead of 2cm.
https://www.diyaudio.com/community/threads/rcf-21-woofer-lf21n451.405626/post-7510921
https://www.diyaudio.com/community/threads/how-to-make-a-whizzer-cone.398063/
https://www.diyaudio.com/community/...loudspeaker-sandwich-cone.402917/post-7443476
It's for Bluetooth music for smartfone use. Think about driving it with a current driven amplifier with LM1875
Visaton BG20's in some 0.5 ft^3 sealed nearly-cubes (meant for integration with sub). Birch veneer plywood, natural stain with satin poly finish.
https://www.diyaudio.com/community/threads/visaton-bg20-8-full-range-driver-sealed-monitors.405844/
Very best,
https://www.diyaudio.com/community/threads/visaton-bg20-8-full-range-driver-sealed-monitors.405844/
Very best,
Let me try to win Ugliest Prize (though far from my cheapest). The sound of the 6x10 DEW-alnico fullrange is kind of like eating creme brulee -- buttery rich crispy textured. When I picked up a pair early 2022 (one of my first forays into bargain vintage alnico) I was so taken by the sweet-not-sour sound I then "fished" four additional drivers. While I had some success combining OB-U (openback shallow box) with side-firing inductor-BSC, even with a third driver I couldn't reach bass much below ~70hz. Tried bi-amping with a 6x9 auto speaker but the sensitivity gap was ~11dB. Finally, last weekend I ran into the Infinity Kappa 693c fiberglass 6x9 3ohm 94dB close to the alnico. Whipped up a filter to reduce 4ohm alnico mid-hi, keeping (boosting) HF above 9khz, 0.68mH || 2.5ohm || 4.7uF; LPF 3mH @ 160hz 1st-order. The cab is ready-made trapezoidal dual-chamber-6x9; alnico port stuffed, bass port to be tuned later. Total cost about 1200... renminbi or $170 not counting Jantzen XO bits.
Have the cake and eat it too!
Have the cake and eat it too!
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What I was afraid of, may have just happened. Potentially A/A/A (hi/mid/lo) high-fidelity sound for 300... renminbi or ~$40/pr. The guilty accomplices are a modified version of the "English drum paper" Michael's Audio 5" (really 4.5"; different sizes 4-8" variously branded Hifi-bird or Isred) and off-the-shelf 4" (supersized) labyrinth. Earlier I had "stacked" the regular version of this driver with another brand's 5" of identical frame but complementary frequency response, called micor55. When I went back for a spare set I was offered the "upgrade". Indeed the midrange was much fuller and the (amazing) dynamics still intact, but the overall transparency and 3D of the original were missing. Scratching my head, I unsealed the roll of 2in automotive "plast" tape and scissor-cut a pair of fan shapes, which self-attached to the drivers' dustcap rim. Tone-sweep and trim... HF flat and whizzer had no distinguishable sound of its own. The 7.5L cabs were cheap but well-built. I simply inserted through the driver cutout a piece of thick cardboard at a slight angle to make a tapered/stepped transmission line of ~1.1m length (quarterwave frequency ~50hz due to taper/mass-load). Comparable to my SB Satori 2-way at 20X the cost....
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You think that's ugly? I think some horns with babybelle cheese wax as filler are my ugliest speakers, anyway I'm off now to Google Infinity Kappa 696C drivers.