SKU: 37447234592

Fet Valve CFR Preamplifier

Sale price$1034.55 Regular price$1149.50
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Ships within 48 hours · Estimated delivery Aug 3 - Aug 8

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Description

Fet Valve CFR PreamplifierThe Fet Valve CFR is our best all tube preamp circuits in a stunning fully remote controlled chassis. The Fet Valve CFR preamplifier takes our best tube preamp circuits to a new level of musicality and user convenience. The Fet Valve CFR has remote volume, remote input switching, remote power, and even remote panel light dimming. Our lovely custom silver faceplate is standard, along with premium quality RCA jacks. The Fet Valve CFR's audio stage is

The Fet Valve CFR is our best all-tube preamp circuits in a stunning fully remote controlled chassis.

The Fet Valve CFR preamplifier takes our best tube preamp circuits to a new level of musicality and user convenience.

The  Fet Valve CFR has remote volume, remote input switching, remote power, and even remote panel light dimming. Our lovely custom silver faceplate is standard, along with premium quality RCA jacks.

The Fet Valve CFR's audio stage is all tube, using 12AT7 tubes for gain and 12AU7 tubes as cathode followers. This combination, done with outstanding multiple regulated power supplies, provides the amazing dynamic range, transparency, and load drive capacity that we demand. It will interface seamlessly into and improve the most demanding audio systems.

We use all polypropylene capacitors in the signal path and the newest high-capacity power supply capacitors.

The Fet Valve CFR preamplifier also includes as a standard feature an exquisite headphone amplifier.

Power Supply and Layout

AVA has long been an advocate of rock solid power supplies, and the power supply used in the Fet Valve CFR is no exception. The high voltage supplies are based around six active high voltage regulators, one for each tube section. This design takes supply noise and interaction down to nearly zero. In addition, there are separate regulated power supplies for the tube heaters and the headphone amplifier. Smoothing capacitors are carefully selected modern, high-reliability, high-capacity units.

The main circuit board uses multiple isolated ground planes strategically interconnected to eliminate the effects of ground currents. A very quiet custom made shielded power transformer is used.

The Fet Valve CFR power supplies are incredibly quiet and rock stable platforms on which our audio circuits can perform their best.

SLR Chassis Design

The SLR chassis features a precision remote control volume control along with five sets of remote switchable inputs and two sets of line audio outputs. Additional functions include:

  • A precision balance control.
  • Mono/Stereo - to get mono audio sources (such as older TV and other video sources) to both left and right channels and to quiet noisy FM broadcast and old records.
  • Low Gain - to allow better volume control use with the high-efficiency speakers and high gain amplifiers.
  • High Filter - to tame excess brightness from low quality sources.
  • Low Filter - to deal with warped records and turntable rumble.
  • Support for tape monitoring.
  • A built-in high quality headphone amplifier.

The 1/4" sculpted aluminum face plate is finished with our incredibly durable double-anodized process is standard. All RCA jacks are premium quality, gold plated, heavy duty parts. A removable IEC power cord is standard as well.

Dimensions: 17" wide x 12" deep x 3.5" high. Shipping weight is 17 pounds.

Reviews

Reviews for the previous generation CF, with identical audio electronics:

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: 37447234592

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4.1 ★★★★★
Based on 29 reviews
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Rachel
Alexandria, US
★★★★★ 4
Not indestructible, but pretty close!
Size: Yellow, Size: Yellow
I adopted a pit mix a little over a month ago, and so far he's managed to destroy every single toy he's had, including ones meant for aggressive chewers. He's a sucker for a good squeaky toy, and this had good reviews (and was affordable) so I decided to check it out. He's had his corn for a week now, and surprisingly, it's still holding up pretty well - though there are some caveats to that. My boy didn't even want to wait for me to take his corn out of the plastic bag, he too excited to get it. He went to town immediately, to the point where he was sitting in a puddle of his own drool after about an hour. He managed to squeak it (which I couldn't do myself), but still hasn't really gotten the hang of doing so - and the squeaker, when wet, does sound a little... Well, wet. He managed to have bite marks in it within the first six hours. Within a day, there were tiny bits of yellow rubber starting to appear anywhere that he played with this toy. A week later and there are some decent sized chunks missing from the corn - some of which I've had to cut off when they got loose and I worried about him choking on them. He loves his corn cob, and will likely get at least a few more weeks of play out of it before I have to toss it for his safety. I'm unsure of whether the squeaker is still functional, but he seems to love it whether or not it squeaks. Overall, it's not a bad toy for most aggressive chewers, but it will not last forever. The rubber is as heavy as the regular red Kong toys, but it feels slightly softer, which might contribute to his ability to break off little pieces. Make sure you keep an eye on your dog with this toy, or with any other, especially if they are chew goblins. But I'd definitely buy this toy again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 6, 2024
Z
Verified Purchase
Zoltare
San Leandro, US
★★★★★ 5
Solid piece
Size: Yellow
Border Collie loves it. Great for aggressive chewers. Prefers this to the carrot or the pineapple one. Probably better for large dogs than my medium size dog as there is some heft to it.
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Reviewed in the United States on December 25, 2025
G
Verified Purchase
Green earth!
Draper, US
★★★★★ 1
Too soft
Size: Blue
Not good for heavy chewing dogs. Gone in 10 minutes!
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Reviewed in the United States on May 25, 2026
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Verified Purchase
Corin E.
Natrona Heights, US
★★★★★ 3
Probably indestructible since your dog won't want to play with it.
Size: Yellow
Boring yellow and rubber chew toy with a weird smell. My dog was not impressed.
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Reviewed in the United States on February 25, 2026
J
Verified Purchase
Jordan Akana
Waukegan, US
★★★★★ 5
Great chew toy!
Size: Blue
Great chew toy that dogs love! The toy is hard but also soft for comfortable chewing. The plastic is lightweight and does not leave sticky residue. It is super easy to clean so won’t leave the toy smelling like stinky dog!
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Reviewed in the United States on December 27, 2025

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