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Dynagrid Jr. Reviews and Impressions (Read 292 times)
Lon
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Dynagrid Jr. Reviews and Impressions
01/30/26 at 08:41:05
 
As there is not yet a Dynagrid Jr. forum, and impressions and reviews have been listed in the "Development" thread I thought I would create a review thread here where early adopters can have a place to post their views and opinions.

I'll list my own experience here soon. I hope that the device will be here in about 15 hours, after two days of delivery dates canceled for "emergency" reasons. Looking forward to plugging this component in, I've re-arranged component locations twice in anticipation, power cable lengths have been responsible for some tricky maneuvering but I have a nice setup arranged and setltled in at last and I can't wait to plug the Jr. in and start listening and comparing. (Going to try to not let the inevitable comparisons drive me a little crazy!)

If you have a Jr. and have any new impressions or first impressions to impart, please feel free to populate this thread.
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JBzen
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Re: Dynagrid Jr. Reviews and Impressions
Reply #1 - 01/30/26 at 10:07:46
 
Looking forward to the reviews. My biggest issue of external rectification was the umbilical cord with AC and DC running parallel over length. It seems that the benefits outdone the negatives in this instance.

I am still trying to fit a DynaGrid in my scheme. The Zrock 2 works well in loop C. I don't at this time think a Zrock 3 will be beneficial installed after the CSP2+. The power conditioning scheme in place and added sub gave loop B an edge that propels it past loop A. More time and listening will tell the tale. If this holds, placing the RtoR in a horizontal position raising it should give enough room for a DynaGrid underneath.

Hope your grief is quailed today Lon!
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{LoopA[AMC CD8b>XO3>Stokes DAC>Carver C-9]LoopB[Ortofon 2M Black>Scout jr/Otari MX5050B2>ZP3]LoopC[Cambridge CXN2>ZDAC>ZBOX>Zrock2]}CSP2+>SE8425th>All ICs silver clad OCC copper braid>lii Crystal 10". Isolation. AC filtering. Room Treatment.
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Lon
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Re: Dynagrid Jr. Reviews and Impressions
Reply #2 - 01/30/26 at 10:27:47
 
I'll just say this: the ZROCK3 is so much a better fit in my system than the ZROCK2. Being able to adjust the gain independent of the EQ is fantatic!

Yes, I hope the component arrives today!
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JBzen
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Re: Dynagrid Jr. Reviews and Impressions
Reply #3 - 01/30/26 at 11:18:27
 
No doubt here Lon. I wanted the Zrock 3 for that very reason placing after the CSP2. Just running out of component real estate. Maybe later.
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{LoopA[AMC CD8b>XO3>Stokes DAC>Carver C-9]LoopB[Ortofon 2M Black>Scout jr/Otari MX5050B2>ZP3]LoopC[Cambridge CXN2>ZDAC>ZBOX>Zrock2]}CSP2+>SE8425th>All ICs silver clad OCC copper braid>lii Crystal 10". Isolation. AC filtering. Room Treatment.
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Lon
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"Love without
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worthless!"
Philip K. Dick

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Re: Dynagrid Jr. Reviews and Impressions
Reply #4 - 01/30/26 at 12:23:53
 
Yes, real estate. I have a small expanded cottage as a home, no space here. . . and I'd love to get rid of the storage unit I have. . . but hate to get rid of all the material there. No easy solutions.

I got lucky that I could squeeze one more space in my Mapleshade Audio Samson Version 3 rack. That's it, no more possible.
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Lon
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"Love without
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worthless!"
Philip K. Dick

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Re: Dynagrid Jr. Reviews and Impressions
Reply #5 - Today at 00:44:02
 
The fourth time out for delivery is the charm–about forty minutes ago a UPS truck pulled up, with both packages, the Dynagrid Jr. (rectifier replacement) in one, the tube and connecting cable in the other. I marveled at the beauty of the component and hooked it all up after it all warmed a bit (it is COLD out there).

I hear a bit more soundstage width, about the same depth, if not a bit more forward. And perhaps a bit more dynamic. Still early though. Definitely a change . . . . I may reverse the fuse direction tomorrow because it does have that “sound” when the fuse is in the direction I usually don’t prefer.

This is a BEAUTIFUL component. Glad I went with walnut for the base, and I’ve never had an 845 before and it’s HUGE tube, will serve as a night light for anyone afraid of things that go bump in the night.

This is going to be fun. My favorite rectifier in the amp is excellent to listen to, this Dynaglide Jr. is a new thing that is exciting to listen to tonight. . . .
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Bottlehead
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Re: Dynagrid Jr. Reviews and Impressions
Reply #6 - Today at 01:26:24
 
Congrats, Lon. Patience has paid dividends. I’ll be watching to see how you evaluate the changing sound.

Randy
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MM
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Re: Dynagrid Jr. Reviews and Impressions
Reply #7 - Today at 01:30:22
 
Congrats, Lon! I’m looking forward to hearing your impressions as it breaks in.
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Lon
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"Love without
guts is
worthless!"
Philip K. Dick

Posts: 27390
Re: Dynagrid Jr. Reviews and Impressions
Reply #8 - Today at 01:35:10
 
Thanks gentlemen. I did end up just now reversing the direction of the fuse and think that was a subtle improvement. I've heard subtle shifts in sound this past hour. I haven't gone through a component break-in in some time so I've been tightening my seat belt and gripping the wheel. . . Wink
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Lon
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"Love without
guts is
worthless!"
Philip K. Dick

Posts: 27390
Re: Dynagrid Jr. Reviews and Impressions
Reply #9 - Today at 10:58:08
 
COLD. I'm getting used to it, especially when it's not snowing. Lots of snow, over a foot, everywhere I haven't shoveled, and on all the trees. BEAUtiFUL.

This is the first morning with the new Dynagrid Jr. I'm listening to John Coltrane "Crescent" Impulse Japan SHM-SACD, an amazing mastering of this classic material.



To be perfectly honest right now. . . I would say that my favorite rectifier in the amp probably gives me a slightly better sound (more to my tailored taste) than the Jr. is dishing out. But it's early yet and I have more tailoring to do as well as the component has more seasoning to do.
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Lon
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"Love without
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worthless!"
Philip K. Dick

Posts: 27390
Re: Dynagrid Jr. Reviews and Impressions
Reply #10 - Today at 14:45:35
 
This is a very interesting component. I haven't completely fallen in love with the sound yet. But I have discovered that unsurprisingly for a Decware component it really delivers a transparent sound to the amp. I think I probably miss "coloration" in my favorite rectifier that I tailored my system sound to. I have also discovered the Jr. is very responsive to electrical and isolation changes. I tried several power cords and returned to the one I use everywhere else in the system as the best fit (PS Audio AC-12). I tried three different favored isolation feet and decided on the Herbie's Audio Lab Iso-Cups with the "deep green moss" balls. I now think the fuse may be the next best target and am wondering if I should commandeer an Audio Magic M1 from one of my ZROCK2s. Ideally I think another SDFB would be great but that has to wait--I can't bear the expense at the moment for one and another matching power cord. And all this adaptability with isolation and power audible makes me think I WOULD hear differences in 845 tubes, and makes me want to try the Linla 845 tube with the inner carbon coating as that coating is featured in my favorite rectifier for the amp and the amp's output tubes.

Yes, my new obsession. . . the Dynagrid Jr. Obviously I needed another obsession. . . .
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JBzen
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Re: Dynagrid Jr. Reviews and Impressions
Reply #11 - Today at 14:57:44
 
Yep we all need another obsession Cheesy

The DynaGrid uses a 1.6 amp fuse. You most likely will be able to use an existing SDFB if there is a place to plug it in.
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Lon
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"Love without
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worthless!"
Philip K. Dick

Posts: 27390
Re: Dynagrid Jr. Reviews and Impressions
Reply #12 - Today at 15:11:31
 
I am aware of the fuse rating. I am hesitant to use an SDFB with a different rating, and I'm not moving any of my current SFDB nor have I ever used an SFDB for more than one component and I'm not going to start now.

There may be another in my future but that's a bit far off.
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CAJames
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lane."

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Re: Dynagrid Jr. Reviews and Impressions
Reply #13 - Today at 15:54:16
 
How many hours do you have on the DGR? My guess is you'll hear (big?) changes until you have well over 100 hours on the 845 tube, but I curious to hear your experience. And the more you have the DGR on the warmer you will be...

I would also be surprised if you didn't hear differences between 845s, and maybe I have a solution for having to buy them in pairs, I'll PM you.

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Lon
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"Love without
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worthless!"
Philip K. Dick

Posts: 27390
Re: Dynagrid Jr. Reviews and Impressions
Reply #14 - Today at 16:14:10
 
I have about 8 hours on the component right now. A middling amount and I know I'll hear changes, I just wanted to get the "architecture" of the gain and fundamentals down pat so that the burn in has at least a foundation to be assessed within.

I'm still tinkering with the gain to get a bit more body to the sound. This will be happening for at least a week!
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Lon
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"Love without
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worthless!"
Philip K. Dick

Posts: 27390
Re: Dynagrid Jr. Reviews and Impressions
Reply #15 - Today at 16:31:46
 
One interesting thing: the right meter registers zero. I wonder if it should.
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CAJames
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lane."

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Re: Dynagrid Jr. Reviews and Impressions
Reply #16 - Today at 16:50:01
 
Quote:
Posted by: Lon      Posted on: Today at 08:31:46

One interesting thing: the right meter registers zero. I wonder if it should.


One meter is voltage and the other is current. Since it is physically impossible to have one without the other I think something is wrong with your meter. It might be riding around in a cold UPS truck froze the grease and it needs time to start moving again. Or it is busted. Does the chassis around the meter get very warm when it is on? I'm guessing you've already tapped on it, I think that is the only user serviceable option, but you could try putting it somewhere very warm for a while.
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[Volumio | Jay's CDT2 MRK3] -> Denafrips Terminator 2 + Gaia
Sumiko Pearwood -> Mapleknoll Athena -> Luxman SUT -> Mapletree Phono 3E
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Lon
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"Love without
guts is
worthless!"
Philip K. Dick

Posts: 27390
Re: Dynagrid Jr. Reviews and Impressions
Reply #17 - Today at 17:02:11
 
It's the voltage meter and obviously the component is functioning and it should I think register voltage. Tapping it does nothing, it's been in a warm spot for nearly 18 hours and functioning about half that time or so. . . if it's frozen it should have warmed up. I think it's probably broken. The chassis around neither meter gets warm.

I'm not too concerned. I would actually have loved the device without meters, so my only real concern is re-sale in nature, something that may never happen in my lifetime. Thanks-- I'll let Steve know.
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MM
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Re: Dynagrid Jr. Reviews and Impressions
Reply #18 - Today at 18:13:41
 
Well that’s super frustrating, Lon.

The left channel recently went out on my 300b. I get that things happen but the shipping back and forth and having a (not inexpensive) device out of your system when we spend so much time enjoying our systems is both frustrating and annoying, to say the least.
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Kahuna Jack
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Re: Dynagrid Jr. Reviews and Impressions
Reply #19 - Today at 19:07:16
 
I dont have helpful audible notes ready to share yet but I can share that my Dynagrid and its 845 do not toss out that much heat as I was expecting. Much less than a stock Dyna ST 70 or a Mac 275 .
I've got 6 or so 845's "in my cart" just window shopping status mostly. The China Hi Fi store and it's USA affiliate sell singles of almost all of the fancy Chinese tubes. Psvane direct also sells singles of some like the top of line Summit. Im not sure if a Summit is needed but it would sure look cool. Almost NOS RCA 845 cool : )
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Lon
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"Love without
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worthless!"
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Re: Dynagrid Jr. Reviews and Impressions
Reply #20 - Today at 21:00:44
 
I also don't sense much additional heat with the Jr. Thanks for the tip about tube shopping.
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Lon
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"Love without
guts is
worthless!"
Philip K. Dick

Posts: 27390
Re: Dynagrid Jr. Reviews and Impressions
Reply #21 - Today at 21:13:11
 
MM wrote on Today at 18:13:41:
Well that’s super frustrating, Lon.

The left channel recently went out on my 300b. I get that things happen but the shipping back and forth and having a (not inexpensive) device out of your system when we spend so much time enjoying our systems is both frustrating and annoying, to say the least.

I absolutely hate having to send an amp in for repair. I may have to send my CSP3 in for repair in the future, the rectifier tube socket seems problematic. But I can make it work and I'll hold off. The meters really don't mean much to me so if I am going to keep the Jr. it won't go back to the mothership just for that. If I decide to sell in the future, probably.
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