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DynaGrid Jr Impressions (Read 318 times)
Steve Deckert
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DynaGrid Jr Impressions
09/29/26 at 03:18:52
 

I realize there is already my original design log thread, and a review thread on this, but there really isn't a simple place to get to the meat of it, which is simply this:  If you have a DynaGrid Jr, 1) what product is it in, 2) what rectifier tube did it replace, 3) what do you hear different.

So far we have built a rather large number of these things and apparently many of the buyers are forum readers but not posters.  

Thanks,

Steve
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Lon
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Re: DynaGrid Jr Impressions
Reply #1 - 09/29/26 at 10:56:15
 
I'll add my info as concisely as I can.

My JR. is serving as the rectifier for my SEWE300B amp.

It replaced several favorite rectifiers, notably a Psvane 274B-Z, and a Linla 274B-D, and an Amperex 5R4WRGB. The Psvane was used most often--a fine rectifier.

What I heard most different from the rectifier in the amp is an increase in clarity and dynamics while maintaining a great frequency balance. I did a lot of tailoring of power and isolation and I have several times reinserted a rectifier into the amp for comparison. . . and gone back happily to the JR.

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HR-1,ZBIT,ZROCK3,SEWE300B,Dynagrid Jr;Rega RP3+all GrooveTracer mods;PSAudio:PST+DSD DAC Mk II,NPC,PowerBases,AC-12 pwr cbls, Reference spkrcbls,GCHA;Mapleshade SamsonV3;VeraFi Audio cpts VooDoo:Stradivarius interconnects;Stack EQ; phones:Sennheiser HD800S,ZMF Ori
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Hearafter
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Re: DynaGrid Jr Impressions
Reply #2 - 09/29/26 at 16:48:01
 
I use my Dynagrid Jr. with my Taboo MkIII.
I have compared the Dynagrid to several rectifiers: GEC U18/20 and Mullard FW4/500 (both with adapter), Stradi 5U4G, Psvane 274-Z, RCA 5R4GY ‘58, RCA 5U4G, Cryotone 5U4G, Sylvania 5U4G.  My preferences are listed in that order. I could be very happy with these rectifiers if I hadn’t  listened to the Dynagrid. Each time I performed a comparison I thought the rectifier sounded good until I installed the Dynagrid.  The Dynagrid just sounds noticably better in every way.  Improved clarity, micro details, imaging, soundstage, fuller sound presence that fills the room and bass clarity and presence.  The Dynagrid has no plans of leaving the Taboo.  

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Aric Super 300B SET
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Sonore Sig Rendu SE Dlx
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kulafu
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Re: DynaGrid Jr Impressions
Reply #3 - 09/29/26 at 18:44:30
 
After reading Lon's review, I bit the bullet and ordered a Dynagrid Jr.  I have used the stock Sarah 300B rectifier, Cryotone 5U4G, 5AR4 and none compared to the Dynagrid Jr.  I wont repeat what has been said before but I am thoroughly enjoying my Sarah 300B and the rest of the system.  BLUF, I listen while I work and I do not tire of listenijng.
Bob
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PAP Trio or Quintets (w/passive and active Xover)s Sarah300b and UFO 25th/Aric Audio Pre/Lampizator Atlantic TRP/USB/Pulse/LHY SW10, Roon/Thorens 1600(SRA ICs and PCs/Equi=Core 1800, SSZ, ACX3,SFDBs and STR-1002s,Dynagrid Jr.)
Richmond, VA
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Lon
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Re: DynaGrid Jr Impressions
Reply #4 - 09/30/26 at 12:54:37
 
Good to see how the JR. is being used!

The clarity that the JR. brought to my system has me rolling tubes and unseating a complement than I had used before. Which makes me feel better about having way way way too many tubes!
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HR-1,ZBIT,ZROCK3,SEWE300B,Dynagrid Jr;Rega RP3+all GrooveTracer mods;PSAudio:PST+DSD DAC Mk II,NPC,PowerBases,AC-12 pwr cbls, Reference spkrcbls,GCHA;Mapleshade SamsonV3;VeraFi Audio cpts VooDoo:Stradivarius interconnects;Stack EQ; phones:Sennheiser HD800S,ZMF Ori
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CAJames
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Re: DynaGrid Jr Impressions
Reply #5 - Yesterday at 15:43:02
 
I was hoping to see posts from more than just three of the "usual suspects." But such is the state of the forum these days.
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[Volumio | Jay's CDT2 MRK3] -> Denafrips Terminator 2 + Gaia
Sumiko Pearwood -> Mapleknoll Athena -> Luxman SUT -> Mapletree Phono 3E
STR-1002 -> Woo WA22 -> 2x UFO25s, balanced monos
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JHC
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Re: DynaGrid Jr Impressions
Reply #6 - Yesterday at 21:40:10
 
I have one of the first 10 DGRs and I've had it on a few different components. At first it was with an SE84UFO and the results were really stunning. I has previous experience with an STR Super Rectifier so my expectations were high. The DGR definitely matched if not exceeded my STR. My experiences echo Lon's and others—the sound is incredibly transparent and the DGR gives an almost uncanny sense of space and separation. The sound I am getting sounds more full and vivid and more enveloping.

I now have it accompanying my (non Decware) preamp and the result is similar. At this point, I can't imagine not having it somewhere in my system.

It seems like most people are using the stock Linlai tube, as am I. There have been a couple notes about different tubes giving different sounds but nothing too extensive. I recently found a Cetron 845 tube for what I consider to be a decent price so I am waiting to see how/if that changes things.
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OnFilter CleanSweep > Pine Tree Conditioner > (Sumiko Starling > VPI Signature Classic > Aric Audio Super MC/MM) or (Eversolo T10 + LHY FMC > LTA Aero DAC) > Pine Tree 'Cosmic Doorway' + DGR Jr. > Alan Eaton 45 Monos > Omega Super 8 HO XRS + DeepHemp 10
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Lon
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Re: DynaGrid Jr Impressions
Reply #7 - Yesterday at 22:25:24
 
Let us know your impressions of the Cetron tube when you have listened to it a bit. I am using another Linlai 845 that seems to be constructed the same as the stock one, but has a carbon coating within the glass. There is a subtle difference that I enjoy.
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HR-1,ZBIT,ZROCK3,SEWE300B,Dynagrid Jr;Rega RP3+all GrooveTracer mods;PSAudio:PST+DSD DAC Mk II,NPC,PowerBases,AC-12 pwr cbls, Reference spkrcbls,GCHA;Mapleshade SamsonV3;VeraFi Audio cpts VooDoo:Stradivarius interconnects;Stack EQ; phones:Sennheiser HD800S,ZMF Ori
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Hearafter
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Re: DynaGrid Jr Impressions
Reply #8 - Yesterday at 23:14:48
 
I use the  Shuguang Natural Sound 845-T.  It was a nice noticeable improvement over the stock Linlai 845.  Well worth the step up with no intentions of trying any other 845’s.
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Aric Super 300B SET
Supratek Cabernet Pre
Mojo Mystique X’25 NC DAC
Sonore Sig Rendu SE Dlx
Vera-Fi LNBH, SSZ, MS, SW
Sonido SWR096FC Towers
KEF 62 Sub pair
SDFB-Graphene Slugs
Veritas Cables
Taboo MK3/DGR/GustardR30/Zrock3/DIY ZROBs
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Sean
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Re: DynaGrid Jr Impressions
Reply #9 - Today at 00:05:28
 
No DGR here. To be perfectly honest I don’t know on which component to use it or how many I’d need. I vaguely recall that coming up in the past. I suppose I could use up to three of them - UFO, UFO25, and or CSP 2+  I’ve kicked around the idea of ordering one or two but just sit paralyzed with overthinking it all. Interested if anyone faced that dilemma and how you handled it.
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PDXDrew
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Re: DynaGrid Jr Impressions
Reply #10 - Today at 00:18:03
 
My order just bummed to parts pulled this morning. I will be pairing mine with my DAC. I'm anxious to see how this combination works.
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Aurender N150, Lampizator GA TRP 2X12, Whammerdyne DAA 2A3 amp, Lii P10 in Modified Open Baffle, 2X RELG2, RSA & QSA cables, And Loving it! DGJ on the way...
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CAJames
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Re: DynaGrid Jr Impressions
Reply #11 - Today at 01:31:36
 
Quote:
Posted by: Sean      Posted on: Today at 16:05:28

No DGR here. To be perfectly honest I don’t know on which component to use it or how many I’d need...I’ve kicked around the idea of ordering one or two but just sit paralyzed with overthinking it all..


Order one and try it in all three, after it is broken in. Leave it in the one that makes the biggest improvement (it will probably be the UFO25) and then decide if you need to order more.
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[Volumio | Jay's CDT2 MRK3] -> Denafrips Terminator 2 + Gaia
Sumiko Pearwood -> Mapleknoll Athena -> Luxman SUT -> Mapletree Phono 3E
STR-1002 -> Woo WA22 -> 2x UFO25s, balanced monos
Omega SAM , Hifiman Arya, Audeze LCD-XC
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Lon
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Re: DynaGrid Jr Impressions
Reply #12 - Today at 12:26:05
 
Congrats PDX!
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HR-1,ZBIT,ZROCK3,SEWE300B,Dynagrid Jr;Rega RP3+all GrooveTracer mods;PSAudio:PST+DSD DAC Mk II,NPC,PowerBases,AC-12 pwr cbls, Reference spkrcbls,GCHA;Mapleshade SamsonV3;VeraFi Audio cpts VooDoo:Stradivarius interconnects;Stack EQ; phones:Sennheiser HD800S,ZMF Ori
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Lon
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Re: DynaGrid Jr Impressions
Reply #13 - Today at 12:29:02
 
Sean wrote on Today at 00:05:28:
No DGR here. To be perfectly honest I don’t know on which component to use it or how many I’d need. I vaguely recall that coming up in the past. I suppose I could use up to three of them - UFO, UFO25, and or CSP 2+  I’ve kicked around the idea of ordering one or two but just sit paralyzed with overthinking it all. Interested if anyone faced that dilemma and how you handled it.

Sean, that is good advice from James.
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HR-1,ZBIT,ZROCK3,SEWE300B,Dynagrid Jr;Rega RP3+all GrooveTracer mods;PSAudio:PST+DSD DAC Mk II,NPC,PowerBases,AC-12 pwr cbls, Reference spkrcbls,GCHA;Mapleshade SamsonV3;VeraFi Audio cpts VooDoo:Stradivarius interconnects;Stack EQ; phones:Sennheiser HD800S,ZMF Ori
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