Wow. TI is fast. I should have a handful more of opamp "samples" to sample a bit later today.
AD, on the other hand, has not even confirmed the order yet.
AD, on the other hand, has not even confirmed the order yet.
Anyone who has not tried the LM6172 really should. Dynamics, micro-detail, soundstage, imaging... Beyond what I thought my system was capable of. Simply mesmerizing. 😱
Where have you got that opamp stuffed?
Had a google for it and the Texas instrument boys said this little fellow gave considerably better performance.
Operational Amplifier (Op Amp) - High Speed Amplifier (>=50MHz) - LMH6622 - TI.com
May or may not be of interest to you 🙂
Had a google for it and the Texas instrument boys said this little fellow gave considerably better performance.
Operational Amplifier (Op Amp) - High Speed Amplifier (>=50MHz) - LMH6622 - TI.com
May or may not be of interest to you 🙂
I've got it stuffed into my WM8740 DAC board, which had an OP275 in it by default, and in which I have tried the following: OPA2132P, OPA2107, AD8599 and AD8066.
Thanks for the link, I'll look into that one.
Thanks for the link, I'll look into that one.
Back on thread. (No, I don't mind the hijack. Keep it up. I am learning a few things outside of my skill set.)
Swapped out the A10P's for A7.3's. Oh, my! Now I remember why the A7.3's have always been my favorite MA drivers. The A10's have been banished to the HT for a month. They either need way more break-in, or indeed the A7.3's are much smoother.
I was having a problem with a hole in the FR around 200Hz. I suspect a combination of floor and ceiling bounce. Offsetting the XO went a long way to fixing it. Usually, the gentler slope is put on the top, but I have 200Hz LR12 on the bottom and 150Hz LR48 on the top. The acid test for me is to run a cello up and down over the XO. Passed.
Second interesting finding, but I knew this all along. I EQ's the system flat 20-20K (well, 15K anyway). The overall sound was a bit flat and thin. So I built a F-M EQ curve in the music player with 6dB boost at 20Hz. It's wonderful! I guess we are all bassheads at heart, aren't we?
A final note. Over at the MA forum, most everyone is clamoring for a very light paper woofer to put under their wide rangers. Got to have a "fast" woofer, you know. Darn it! My massive aluminum subs integrate beautifully with the A7's. Once you have felt a true 20Hz note, you can't go back.
Bob
Swapped out the A10P's for A7.3's. Oh, my! Now I remember why the A7.3's have always been my favorite MA drivers. The A10's have been banished to the HT for a month. They either need way more break-in, or indeed the A7.3's are much smoother.
I was having a problem with a hole in the FR around 200Hz. I suspect a combination of floor and ceiling bounce. Offsetting the XO went a long way to fixing it. Usually, the gentler slope is put on the top, but I have 200Hz LR12 on the bottom and 150Hz LR48 on the top. The acid test for me is to run a cello up and down over the XO. Passed.
Second interesting finding, but I knew this all along. I EQ's the system flat 20-20K (well, 15K anyway). The overall sound was a bit flat and thin. So I built a F-M EQ curve in the music player with 6dB boost at 20Hz. It's wonderful! I guess we are all bassheads at heart, aren't we?
A final note. Over at the MA forum, most everyone is clamoring for a very light paper woofer to put under their wide rangers. Got to have a "fast" woofer, you know. Darn it! My massive aluminum subs integrate beautifully with the A7's. Once you have felt a true 20Hz note, you can't go back.
Bob
so very true about the bass. Also true that big diaphragm drivers do it in a way that no others can. Freeing the 7.3 of its low end duties improves the overall performance in a very positive way. I have considered crossing to a RAAL, but this is heresy🙂
Great update! Interesting read & some useful insights for when it's time for me to start playing with XO & EQ...
Out of interest, what piece of Cello work do you favour for your listening tests?
Out of interest, what piece
Any of the Bach suites will work, although I recently got the complete Beethoven sonatas. There is something about the timbre of the cello that highlights phasing and resonant problems.
Bob
Bob
Yo-yo Ma for my money.
I've got 4-500hr on my A7's and I still wouldn't call them smooth. Slick maybe, exciting definitely but a bucketful less of the smooth compared to my 10.3ms 1000hr plus. I'm begining to wonder if the actual burn in time isn't nearer 1000hr than the 300hr.
I've got 4-500hr on my A7's and I still wouldn't call them smooth. Slick maybe, exciting definitely but a bucketful less of the smooth compared to my 10.3ms 1000hr plus. I'm begining to wonder if the actual burn in time isn't nearer 1000hr than the 300hr.
I do like Bach's Cello Suites, have an EMI Classics recording by Paul Tortelier of suites 1 to 6... Yo-yo Ma certainly, Julian Lloyd Webber also 🙂
Just about to order a second pair of A7's for some sealed enclosures. I want to keep my FH3 fitted A7's where they are, as they're lovely sounding speakers. I only have a selection of old Mission speakers to compare them to, which just can't compete.
Just about to order a second pair of A7's for some sealed enclosures. I want to keep my FH3 fitted A7's where they are, as they're lovely sounding speakers. I only have a selection of old Mission speakers to compare them to, which just can't compete.
Well, let's see. My A7.3's have been in the HT for 2yr, say 4hr/day, 6days/week, 300 days/year. That's 14400hr. Yep. They are broke in!
Bob
Have yout see n a source for nanoDigi with bluetooth and a s/pdif output? I can´ t believe that there is none!
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