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The Tantalizer
1st page - the
wofer system |
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Midrange and top Midrange and top has been through quite a few changes. The final decision fell on the PHL 3451 Midrange and the Aurum Cantus G1 ribbon. Both high sensitivity systems with more than 100 dB/1Watt. |
 Click thumbnail for lager picture. |
PHL 3451 frequency plot. This is a CLIO file
converted to the NetCalc file which I use for calculation of the X-over. The
plot is a gated frequency sweep at approx. 1 meter distance. The sensitivity
is approximated as the microphone has not been calibrated. The small peak at 350 Hz may be some cavity resonance on the back of the baffle. |
| Midrange baffle has been covered with 3 layers of cork - totalling 12 mm. Cut out to fit the PHL midrange. |
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| The cork covered baffle with cut-out for the Aurum Cantus ribbon. |
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| The leather is glued on. |
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| The leather is fastened on the back side of the bafle |
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| A trial mount - everything fits nicely. |
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| A view from the side. The top corner of the leather covering as well as the top plate not yet finished. |
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| A closer look at the new
DIY ribbon. Still in it's prototype stage but working quite OK. I have tried
a few stepup-transformers but still remain to find the right compromise
between load and sensitivity. The first one gave 1,5 ohm and well over 100
dB/1W, but the new one I made recently is more than 10 ohms and approx 92
dB/1W.
Another thinner 4u ribbon will be tried, The one I use now is 9 u.
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| Go to next page - finished system | |