SKU: 64499048748

Dyna 70 Upgrade Bare Board Only

$98.10 $109.00
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USA
  • USA
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Ships within 48 hours · Estimated delivery Aug 3 - Aug 8

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Description

Dyna 70 Upgrade Bare Board OnlyThe AVA enhanced pure vacuum tube amplifier for your original Dyna ST 70 chassis. Over the years, we have received may requests asking for service and upgrade help with the long out of production Dynaco ST 70 vacuum tube power amplifier. The Ultimate 70 is a AVA circuit set for the Dyna ST 70 chassis that goes far beyond the original Dynaco design. The audio circuit has been carefully engineered for the widest controlled bandwidth and stability under

The AVA enhanced pure vacuum tube amplifier for your original Dyna ST-70 chassis.

Over the years, we have received may requests asking for service and upgrade help with the long-out-of-production Dynaco ST-70 vacuum tube power amplifier. The Ultimate 70 is a AVA circuit set for the Dyna ST-70 chassis that goes far beyond the original Dynaco design.

The audio circuit has been carefully engineered for the widest controlled bandwidth and stability under all conditions. We think you will love the Ultimate 70 as it is just simply lovely sounding. It takes every last bit of grain away from your records and CDs, but takes nothing else away at all. The highs just float. Transparency, detail, definition, range, and dynamics are wonderful. It's got a mid range to die for and bass extension and control you would not believe possible at this power and price. The sound stage is huge, the depth is pure reality, and the emotion of the music is all there, like you have never heard before.

Rebuild kit plans

If you would like to build the Ultimate 70 rebuild kit but are not sure of what is involved, you can download sample instructions of what is involved here.

Rebuild kit PC boards

If you are a real do-it-yourselfer, you can purchase just our bare PC Ultimate 70 bare circuit board and we will provide the full manual upon board purchase. You would furnish all of your own parts.


Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 64499048748

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4.1 ★★★★★
Based on 21 reviews
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Verified Purchase
Christina
Dallas, US
★★★★★ 4
Smaller than pictured
Color: Mixed, Size: Medium, Color: Mixed, Size: Medium
It’s a lot smaller than pictured and I have the same dog type as was depicted in the one of the pictures. The dog like it so I guess that’s good. I will not be playing tug of war with him using this. I like my fingers thank you very much. I would say it durable. He destroys most toys in minutes. He did destroy the squeaky part in about 10 minutes so bonus points for that.
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Reviewed in the United States on October 11, 2025
R
Verified Purchase
Richard Morrison
Lexington, US
★★★★★ 5
Great for dogs like to to chew and like squeakers!
Color: Mixed, Size: Medium, Color: Mixed, Size: Medium
Harder to hold up to his bites. He started to pounce on it to make it squeak like he was honking the horn. He likes it and carries it around the house. Its a must buy for medium to large dogs
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Reviewed in the United States on December 18, 2025
A
Verified Purchase
April WNolen
Belleville, US
★★★★★ 3
Dog & I Disagree/ Aggressive Chewers Short-Term Toy
Color: Red, Size: Medium
This is day two, and, My dog LOVED this toy! He loved the squeaking aspect, chewing the center squeaky area so he could squeak it himself (adorable!). He also loved playing fetch with it, but he loves fetch, but this was fun for him as it wasn't a ball. The chewing enjoyment is where it was at for him as he Loves to chew, and it was a nice weight that he could really carry around and have fun. I did love this toy, as it was cute, and he was having such a great time with it! Until his teeth kept getting stuck in the rubber around the center squeaker area when getting it to squeak by himself. That was almost it, but he LOVES this toy, so I gave it another chance. Then, one of his teeth got stuck in the center and his teeth became hooked on the top of the outer round and he couldn't get it out of his mouth. That was the End. Perhaps more size options, small, medium, and large, with safer spaces, at each size, between the squeaker area and the outer ring- so they can squeak it, yet avoid getting their teeth stuck and/or their mouths stuck open. I would say the durability is lacking, as, while similar, a Benebone it is not, though it gets sharp too-ouch! He had the outer rounds pretty tore up on the first day, and even more tore up today, so if you have a truly aggressive chewer, this is also a short term toy. This is a fun toy and many love it, though many more could love it with a few modifications. As it is, I did not find it a value for my money, even with as much fun as he had; at this time, the safety aspect and the ease with which he chewed it requires I look somewhere else. I hope this helps.
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Reviewed in the United States on January 2, 2026
K
Verified Purchase
Kayala
Boise, US
★★★★★ 1
Plastic cut my dog
Color: Mixed, Size: Medium
If your pet chews a lot do not buy. My dog chewed the plastic and cut her nose when grabbing the toy because of how sharp it became.
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Reviewed in the United States on May 17, 2026
A
Verified Purchase
Amy
Natrona Heights, US
★★★★★ 5
Great for aggressive chewers
Color: Mixed, Size: Medium
This toy held up well. My dog is a very aggressive chewer and will shred apart any toy she can. She was not able to tear up this one. I have not found many toys that she doesn't destroy
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Reviewed in the United States on May 9, 2026

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