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This has been about as close to trial by fire as I've ever been.
It all started when I wanted to try a new pair of speaker cable. I had a four channel amp that could be made
into two channel (monoing two channels) and wanted to hear how they sound. Had two sets of SC originally and only had one set of trial. It was awesome sound while it lasted. Fried the amp cause the speakers were 4 ohm. Went through a slew of amps trying to come up with one I liked and during that process my wife who lost her vision inadvertently turned the volume all the way up through the remote didn't realize she was on the wrong channel. When she pushed the right one it blew out the mid range on a speaker. Of course you can't get a new driver on a twenty plus year old speaker so now gotta find a good combination.
With having a job it became quite the challenge. To get to 500 hrs on a piece in thirty day requires the unit to be on over 16 hrs a day and the manufactures kept telling me to give it time to break in. That ended up with purchasing and having to sell as used six different amps and two pair of speakers. I estimate I've lost over five digits money wise and yet I pursued on. I got a little crazy with it cause during that time I was dealing with my wife's situation (which got worse), not thinking properly and taking someone's advice other than my own ears.
In the end I've found that class D just isn't for me and while I set a limit on my purchases should have gone beyond it in the first place cause I ended up putting out the money through my endeavors.
I now have Dali Rubicon 6 speakers, Coda Continuum 8 amp, Sonnet Morpheus mkII dac with Happa Audio connecting everything. I hope to never replace my Accuphase C11 pre or MF MCD cd spinner. Hoping this is it for me. I had original stuff for over twenty years and was happy. I am at happy plus with what the system is now.
And to top it all off I find myself not listening to anything since the loss of my wife. Go figure.

Don
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I am wondering if any have compared the sonics of the new Tung Sol KT88 vs the KT120? Both are similar in
conditions with ~13% difference in transconductance.

Since the same audio system is used, and similar conditions, the conditions are similar enough
for comparison.

Do they sound exactly the same or some sonic difference in your experience?

I saw where the price difference is only $7/tube, so I thought might be good to try.

Longevity is another question I  have.

Cheers

steve
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Hey Barry,
Good to hear from you. It's been a while. The AA goes back a ways. Was Dusty one of the guys at AA? I wasn't aware those tubes had similar enough characteristics to be able to be swapped out. I really like my 6ns7 Supratek pre, but the Hattor (aka Khozmo) with NewClassD opamp is very good and resolves a bit better. I'm fortunate to have those choices.

Hey Nick, still passing through every so often ;)

The Musical Paradise 701 is designed to handle all kinds of tubes and also allow for easy swapping of capacitors...

https://www.musicalparadise.ca/store/index.php?route=product/product&product_id=103

Technical highlights

1. Onboard filament voltage switches allow support both 6.3V and 5V rectifier, 6.3V and 12.6V signal tubes.

2. Onboard DIP switches allow user to select 4 different levels of output gain to support different input sensitivity of amplifiers. 

3. Zero negative feedback circuit provides the most natural sounding.

4. Oversized 150W toroidal transformer provides sufficient power redundancy. It is magnet shielded in the compartment underneath the motherboard.

5. Output coupling capacitors and power filtering bypassing capacitors are user changeable to further improve or customize the overall sound characteristics. No soldering is required.

6. Built with genuine HiFi grade components, such as Vishay military grade resistors, Genuine Rubycon and Nichicon LOW ESR power filtering capacitors, OHVL coupling caps, Bennic XPP bypassing capacitors, ALPS volume control and power switch, heavy gold-plated terminals.

7. Solid aluminum alloy case, suspension feet and knobs.

8. Remote volume control feature.



Hey Barry,

Keep passing through...we'll be here 😊 That is really a flexible device. I appreciate a manufacturer that provides so many options and great value for it's customers. I've read many positive comments about Musical Paradise. I see they offer other devices including an amp and external clock and a nice looking learning remote for the various devices.

Next up for me is auditioning some copper and silver cables from Jason at Hapa Audio on AC. I have his polished silver coax and it bettered my WyWires Platinum.
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Hey Barry,
Good to hear from you. It's been a while. The AA goes back a ways. Was Dusty one of the guys at AA? I wasn't aware those tubes had similar enough characteristics to be able to be swapped out. I really like my 6ns7 Supratek pre, but the Hattor (aka Khozmo) with NewClassD opamp is very good and resolves a bit better. I'm fortunate to have those choices.

Hey Nick, still passing through every so often ;)

The Musical Paradise 701 is designed to handle all kinds of tubes and also allow for easy swapping of capacitors...

https://www.musicalparadise.ca/store/index.php?route=product/product&product_id=103

Technical highlights

1. Onboard filament voltage switches allow support both 6.3V and 5V rectifier, 6.3V and 12.6V signal tubes.

2. Onboard DIP switches allow user to select 4 different levels of output gain to support different input sensitivity of amplifiers. 

3. Zero negative feedback circuit provides the most natural sounding.

4. Oversized 150W toroidal transformer provides sufficient power redundancy. It is magnet shielded in the compartment underneath the motherboard.

5. Output coupling capacitors and power filtering bypassing capacitors are user changeable to further improve or customize the overall sound characteristics. No soldering is required.

6. Built with genuine HiFi grade components, such as Vishay military grade resistors, Genuine Rubycon and Nichicon LOW ESR power filtering capacitors, OHVL coupling caps, Bennic XPP bypassing capacitors, ALPS volume control and power switch, heavy gold-plated terminals.

7. Solid aluminum alloy case, suspension feet and knobs.

8. Remote volume control feature.

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Manufacturer News / HAL at CAF2024 in Rockville MD
« Last post by HAL on July 20, 2024, 12:52:14 PM »
HAL and Danville Signal will be in room 702 for CAF2024 from 8-10 November.

The heart of the system will be the full production dspNexus 2x8 with the ADSP21569 DSP and AKM AK4499EX DAC upgrade.

Will post pictures of the system as time gets closer, but there will be an AB comparison of passive vs DSP crossovers.

Hope to see people in our room to say hello and give a listen.   :D
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Bipolar System Disorders / Re: what recent changes have you made to your system?
« Last post by Nick B on July 19, 2024, 05:38:07 PM »
Thanks, Bob. What a nice setup and diy panels as well. I have never heard Apogees at a friend's or at a show. How long have you had them? Are they completely original or has any restoration work been done? What amplification are you using and what is the accompanying equipment? I have no acoustic treatments in my new home yet, but am looking into it. I am also so fortunate to have my JM Reynaud Voce Grande.... what amazing two way speakers.

Mine were original when I got them oh maybe 10 years ago, with little of the dreaded bass buzz, but I bought a subwoofer controller that now sits between my preamp and amp (Mccormack DNA500). The cutoff is 80Hz on that, so the panels and amp don't see anything below that. The dual subs take care of the bottom end and problem solved. I did update the crossover (what a beast!) with caps, resistors and wiring and put it in a separate box behind the speakers.

If you get a chance to hear Apogees, or most any pure ribbon speaker (there aren't many) you should do so and curse me after. One caveat ... they are true one person speakers. The sound outside the sweet spot is good, but, in true racecar fashion, they need perfect setup to bring that amazing presentation to the center seat. But if you are in that seat there's no going back.

Thanks for the background on those Apogees. About 10 years, ago I owned a McCormack DNA 500 and that is quite an excellent amp to drive those speakers. It's good that you solved that buzzing problem by restricting the low frequency and using dual subs. I would consider myself fortunate to someday be able to listen to Apogees, even if it meant being in an extremely limited sweet spot.
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Music Discussion / Re: Sharing Top Notch, Reference Music Links.....
« Last post by Nick B on July 19, 2024, 05:32:38 PM »
I keep finding new 'groups" and venues I personally enjoy. More Vivaldi, but a different musical
selection and group than the fire.

https://www.youtube.com/watch?v=bJYbp0kjXBI

I thought I might also add this version for your thoughts.

https://www.youtube.com/watch?v=3b5ws3fqA30

Enjoy.

steve

Thanks, Steve. I especially enjoyed the second video with two very young violinists 👍 🎶
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Music Discussion / Re: Sharing Top Notch, Reference Music Links.....
« Last post by steve on July 19, 2024, 02:22:33 PM »
I keep finding new 'groups" and venues I personally enjoy. More Vivaldi, but a different musical
selection and group than the fire.

https://www.youtube.com/watch?v=bJYbp0kjXBI

I thought I might also add this version for your thoughts.

https://www.youtube.com/watch?v=3b5ws3fqA30

Enjoy.

steve
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