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--- astra_conv:conversion:audio:audio [2014/08/22 13:46]
richard
+++ astra_conv:conversion:audio:audio [2014/08/22 14:09] (current)
richard
@@ Line 96: / Line 96: @@
-{{:astra_conv:conversion:audio:Gladen_test_results_hifitest_c.jpg?500}}
+{{:astra_conv:conversion:audio:Gladen_test_results_hifitest_c.jpg?600}}
 Fortunately, with the given crossover frequencies of 700Hz and 4500Hz, they are operated in their "sweet spot", both what concerns harmonic distortion and frequency response including angular behaviour.
@@ Line 165: / Line 165: @@
 {{:astra_conv:conversion:audio:p1100380.jpg?600|}} {{:astra_conv:conversion:audio:p1100388.jpg?600|}}
-The mid range speakers (which have a closed camber) were mounted on wooden spacer rings, but due to their depth also required cutouts in the door panels. The ugly blain in the cover below the cutout even was intentional, though it came out misshapen: The new bass chassis have a slightly higher diameter, so I had to mistreat the plastic cover with the hot air blower to free some space for them.
+The mid range speakers were mounted on wooden spacer rings, but due to their depth also required cutouts in the door panels.
-{{:astra_conv:conversion:audio:p1100163.jpg?600|}} {{:astra_conv:conversion:audio:p1100383.jpg?600|}}
+For the cone speakers that I installed later, I used wedge-shaped adapter rings to slightly tilt the chassis back - and upwards.
+{{:astra_conv:conversion:audio:p1120163.jpg?600|}}
+{{:astra_conv:conversion:audio:p1120165.jpg?600|}}
+{{:astra_conv:conversion:audio:p1100383.jpg?600|}}
+The ugly blain in the cover below the cutout even was intentional, though it came out misshapen: The new bass chassis have a slightly higher diameter, so I had to mistreat the plastic cover with the hot air blower to free some space for them.
 Re-assembled front door with bass chassis and midrange speaker - first attempt ...
@@ Line 223: / Line 231: @@
 After quite some fruitless efforts to get the system to sound well, I decided to objectively record the frequency response.
+##############################################################
+Please note: The following measurements were all done before I replaced the mid-range speakers. With the second version that I used, I was able to get a proper sound out of the system, by just adapting the levels of the different chassis. I so far have not repeated the measurements with the new setup.
+##############################################################
 This eigthies' electret condensor microphone is placed beneath the passenger seat's headrest.
@@ Line 264: / Line 279: @@
 Apart from that - it seems that here I am at a point where I can either pretend that I am happy with the sound, or I have to bear the effort of integrating a digital sound processor. Starting with this, probably also the passive cross-overs would have to give way to a few more amplifiers...
+##############################################################
+Please note: I had drawn above conclusion before I replaced the crappy midrange speakers. With the second set of speakers, the sound is now much better, without any large investments like sound processor or active crossovers.
+Before the speaker swap, I even had tried to integrate a sound processor. I returned it shortly after, since the sound got "artificial" rather than "good".
+##############################################################
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