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PostPosted: August 24th, 2022, 10:16 pm 
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Location: Parkville, Maryland
David McGown wrote:
Well, after receiving the new-to-me Nestrovic 5AS MkV RE speakers from Charlie a few weeks ago, my main DIY goal it to make sure all my amps are capable of driving them. I just received a pair of Heyboer Peerless S-265-Q output transformers this week, so working on converting the stereo EL34 Williamson amp I built a year ago (using UTC LS-55 OTs) to a Musicians Amplifier (807/KT66 UL), increasing output from 15W to just under 30W. Next project after that is my GM70 SET amp, which needs a driver upgrade for sufficient voltage swing (and current output) ensure A2 operation, thinking about a 6P5 into parallelled sections of a 5687, IT coupled to the GM70 grid. I should be able to get at least 30W with this setup). Other than that, the project pool is kind of shallow for now...more time for listening.

OH MY GOD!! Please do not touch your GM-70s. They are glorious as they are right now. You may make a change that will kill the magic. :wtf:

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PostPosted: August 24th, 2022, 10:39 pm 
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I haven't built anything for the home systems in quite a while dammit. I've been spending my days building these.
It's an interchangeable preamp system for basses. At least it's musical.


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PostPosted: August 25th, 2022, 8:15 am 
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Jkdahlman wrote:
I haven't built anything for the home systems in quite a while dammit. I've been spending my days building these.
It's an interchangeable preamp system for basses. At least it's musical.


Very cool looking! I bet they sound great!

Good job!


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PostPosted: August 25th, 2022, 8:26 am 
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David McGown wrote:
Well, after receiving the new-to-me Nestrovic 5AS MkV RE speakers from Charlie a few weeks ago, my main DIY goal it to make sure all my amps are capable of driving them. I just received a pair of Heyboer Peerless S-265-Q output transformers this week, so working on converting the stereo EL34 Williamson amp I built a year ago (using UTC LS-55 OTs) to a Musicians Amplifier (807/KT66 UL), increasing output from 15W to just under 30W. Next project after that is my GM70 SET amp, which needs a driver upgrade for sufficient voltage swing (and current output) ensure A2 operation, thinking about a 6P5 into paralleled sections of a 5687, IT coupled to the GM70 grid. I should be able to get at least 30W with this setup). Other than that, the project pool is kind of shallow for now...more time for listening.


Can't wait to get to your house and hear the Nesties in their new home. Went by Charlie's and heard the Contrivas. Very refined.

I think you are on the right track, getting more Class A power from your power amps. One observation I had every time at Charlie's was that the Nesties craved more power. He was/is aware. Same situation with the Contrivas. Only obvious at room filling levels with lots of low frequency energy. For some reason, Class A watts always "sound" more powerful than AB. So, hopefully your amps will do your speakers justice!

Your project pool is only shallow in your mind!!! It's amazing to many of us!

Slick


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PostPosted: September 4th, 2022, 12:47 pm 
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svenska wrote:

The SMJ Ardent D's are the towers. The MT's got moved up to the den after this photo.
Image


I've had the privilege of hearing Sven's system. Those speakers are kick-a$$.

The towers literally use STOA drivers - and top-of-the-line crossover parts. The cabinets are insanely heavy and resonance-free.

The MT next to the towers might be one of the best 2-ways I have ever heard.


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 Post subject: New speaker build
PostPosted: September 4th, 2022, 12:54 pm 
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I recently started a large floorstander - designed by the same person that designed Sven's speakers (JonMarsh - at HTGuide).

The are somewhat similar to Tom's egg speaker.

The system will incldue:
- Tweeter: BlieSMa T34A-4
- Midwoofer: PuriFi Midwoofer
- Bass: Dayton Audio RSS315-HFA-8 (wired in parallel)

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PostPosted: September 4th, 2022, 1:02 pm 
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Very cool! Must be hard working with all those angles, I had to make 15 jigs to assemble the eggs and bases.

Tom


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 Post subject: Re: New speaker build
PostPosted: September 4th, 2022, 1:46 pm 
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dkalsi wrote:
I recently started a large floorstander - designed by the same person that designed Sven's speakers (JonMarsh - at HTGuide).

The are somewhat similar to Tom's egg speaker.

The system will incldue:
- Tweeter: BlieSMa T34A-4
- Midwoofer: PuriFi Midwoofer
- Bass: Dayton Audio RSS315-HFA-8 (wired in parallel)

Image


Wow, those are impressive!

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PostPosted: September 4th, 2022, 3:08 pm 
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Posts: 78
Thanks, Dave/Tom

Just looking at the pictures now - they look enormous - but they really aren't.

They may be largish - but really not all that big. That picture makes them look huge.

They are similar in size to The Egg speaker - perhaps a tad taller (they are about 58"/59") - but with a smaller footprint.


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PostPosted: September 4th, 2022, 3:45 pm 
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Does that put the tweeters above ear level when seated?


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