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-   -   Dennis Had Inspire Amps (https://www.audioaficionado.org/showthread.php?t=24170)

Formerly YB-2 03-31-2016 04:16 PM

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Musica Amantem 03-31-2016 05:26 PM

Intriguing article:

http://www.salksound.com/wp/?p=56

Although it is nothing we did not know, the arguments are compelling against what we are all doing. (Can anyone tell me how to post a link that is "not active"?)

nhparrot 03-31-2016 06:25 PM

Quote:

Originally Posted by Formerly YB-2 (Post 770980)
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Coltrane1 03-31-2016 07:43 PM

Quote:

Originally Posted by Musica Amantem (Post 770992)
Intriguing article:

Sensitivity and Hofman’s Iron Law, or “why you can’t have your cake and eat it too”

Although it is nothing we did not know, the arguments are compelling against what we are all doing. (Can anyone tell me how to post a link that is "not active"?)

Eliminate the cabinet. Eliminate assigning low frequency duty to your amplifier. Think outside of the box - Literally. Problem solved.

http://i1192.photobucket.com/albums/...o/8fdb82be.jpg

Musica Amantem 04-01-2016 07:43 AM

Quote:

Originally Posted by Coltrane1 (Post 771021)
Eliminate the cabinet. Eliminate assigning low frequency duty to your amplifier. Think outside of the box - Literally. Problem solved.

http://i1192.photobucket.com/albums/...o/8fdb82be.jpg

Well, I'm using an active Subwoofer, crossed at 80 Hz, so that is taking care of low frequencies loading my Inspire. Open baffle speakers, I hear these have their own tradeoffs too. My gear sounds just right to my ears, but I was wondering what the high sensitivity specs are taking away from the speakers' sound potential. What is the sensitivity in those OB's? Thanks!

FloridaBoy 04-01-2016 07:52 AM

Quote:

Originally Posted by robert_kc (Post 770902)
How do Gold Lion 6V6GT's compare with 6L6GC's in terms of sound quality, and gain?

For what you listen to I'd stay with 6L6's/KT66. Spend a bit more and get the GL KT66.

One you get a few power tube you really like concentrate on input tubes and consider changing the coupling caps.

Coltrane1 04-01-2016 03:43 PM

Quote:

Originally Posted by Musica Amantem (Post 771109)
Well, I'm using an active Subwoofer, crossed at 80 Hz, so that is taking care of low frequencies loading my Inspire. Open baffle speakers, I hear these have their own tradeoffs too. My gear sounds just right to my ears, but I was wondering what the high sensitivity specs are taking away from the speakers' sound potential. What is the sensitivity in those OB's? Thanks!

It's not a perfect world. Everything's a tradeoff. Dual subs are better than one sub, in my experience. And all "subs" aren't created equal, like all speakers aren't. I've never experienced tighter nor more musical bass than produced by these very affordable Augie 15" sub drivers. Sensitivity is overrated in my experience, for everyone listens differently. There are too many listening variables. Jazz and Classical lovers on average aren't attempting to blast the walls down like the stereotypical R&R listener. Young listeners have different volume demands than older listeners. I don't have HT demands, and operate solely a 2 channel system. I'm pushing Martin Logan Electrostats with a Dennis Had Fire Bottle KT88...it has all the volume one reasonably requires in an average sized room. Those OB's were rated somewhere in the higher 90 range...all that was required to drive them was an affordable plate amp on the subs, and a 3 watt SET on the 15" mid drivers.

See plate amps encased in Sapele wood surrounds to each side of each speaker

http://i1192.photobucket.com/albums/...o/8b4b9436.jpg

Musica Amantem 04-01-2016 04:25 PM

Excellent setup, indeed. Congrats!

My SPL needs are also modest, no HT, almost exclusively Jazz and classical, near field, small listening room, and while I'm very happy as it is, I would like maybe some more "slam" (not loudness) from certain classical music passages. Definitely, the theoretical 98 dBs at 8 Ohms rated sensitivity on my current speakers help a lot.

Interesting about the Martin Logan Electrostats. I thought those would be prohibitively insensitive for the Inspire KT-88, that I also own. I guess it all depends on the particular SPL needs. I'm definitely considering a stereo Sub setup in the future. Thanks for the pointers.

x3workshop 04-02-2016 08:16 AM

Quote:

Originally Posted by Musica Amantem (Post 771203)
Excellent setup, indeed. Congrats!

My SPL needs are also modest, no HT, almost exclusively Jazz and classical, near field, small listening room, and while I'm very happy as it is, I would like maybe some more "slam" (not loudness) from certain classical music passages. Definitely, the theoretical 98 dBs at 8 Ohms rated sensitivity on my current speakers help a lot.

Interesting about the Martin Logan Electrostats. I thought those would be prohibitively insensitive for the Inspire KT-88, that I also own. I guess it all depends on the particular SPL needs. I'm definitely considering a stereo Sub setup in the future. Thanks for the pointers.

I have Martin Logan Electromotion ESL's that I have had hooked up to my Inspire KT88 and the volume and sound quality were excellent. I do have a ML Dynamo 700 sub hooked up with the Inspire only handling >100hz signals. It is a very good way to run these amps.

FloridaBoy 04-02-2016 10:18 AM

Pre amp coupling caps
 
I replaced the coupling caps in the LP27a with Jupiter HT copper foil/beeswax. They have to settle in but so far a good move in my rig.

http://i66.tinypic.com/akcxvd.jpg


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