Hi,
I have built TQWT enclosures for fostex fe 166en (low Qts) working with a sansui AU-217 amplifier. The problem is that this combination is overdamped, bass is low and over-controlled.
So I was thinking changing the voltage feedback loop of my amplifier to a current feedback loop by modifying the power output stage.
I plan to take feedback from resistor (about 8 ohm) placed in series with the loudspeaker and take feedback from there.
Has somebody already tested such a mod?
before :
[IMGDEAD]https://lscrrg.dm1.livefilestore.com/y1ppFtQfX4pAwQTyvqU56cw0CLwaTuDqDagjuUM20PTtpJK4SbqWiaopsikdicjbb-PDsmS0XonD3_WT0k_w9sT8TaZbzVl2z_c/AU_217_before.JPG?psid=1[/IMGDEAD]
after :
[IMGDEAD]https://lscrrg.dm1.livefilestore.com/y1p9ia3FHucZh-IFv0EdJFSEMr5LZ-31G_IjC7egLabszkkChv_AtMZBkF_Epee13xe81qLSgd0bpTsn4mtyNrK-5fx0-1q8KWx/AU217_after.JPG?psid=1[/IMGDEAD]
I have built TQWT enclosures for fostex fe 166en (low Qts) working with a sansui AU-217 amplifier. The problem is that this combination is overdamped, bass is low and over-controlled.
So I was thinking changing the voltage feedback loop of my amplifier to a current feedback loop by modifying the power output stage.
I plan to take feedback from resistor (about 8 ohm) placed in series with the loudspeaker and take feedback from there.
Has somebody already tested such a mod?
before :
[IMGDEAD]https://lscrrg.dm1.livefilestore.com/y1ppFtQfX4pAwQTyvqU56cw0CLwaTuDqDagjuUM20PTtpJK4SbqWiaopsikdicjbb-PDsmS0XonD3_WT0k_w9sT8TaZbzVl2z_c/AU_217_before.JPG?psid=1[/IMGDEAD]
after :
[IMGDEAD]https://lscrrg.dm1.livefilestore.com/y1p9ia3FHucZh-IFv0EdJFSEMr5LZ-31G_IjC7egLabszkkChv_AtMZBkF_Epee13xe81qLSgd0bpTsn4mtyNrK-5fx0-1q8KWx/AU217_after.JPG?psid=1[/IMGDEAD]
Last edited: