$39.95 Buy It Now or Best Offer
free,30-Day Returns
Seller Store bryan5849
(1103) 100.0%,
Location: Dallas, Texas
Ships to: US,
Item: 204839009202
Restocking Fee:No
Return shipping will be paid by:Buyer
All returns accepted:Returns Accepted
Item must be returned within:30 Days
Refund will be given as:Money Back
Dynaco:Dynaco
Type:Tube Amplifier
Unit Type:Unit
Country/Region of Manufacture:United States
Unit Quantity:Pair
Miller Audio introduces our new Negative Feedback Selector (NFS) upgrade for Dyna-70 and Dyna-120 Amplifiers and VTA ST-70’s! Usual questions such as: “What is Negative Feedback?” and “Why do I need a Negative Feedback Selector?” often follow. Therefore, the following is some background on what Negative Feedback (NFB) is, how it’s used, and why you should consider this upgrade if you already have a Dyna-70 Ultimate Upgrade ST-70 amplifier. The Dynaco ST-70 is designed with 4-, 8- & 16-Ohm speaker outputs. As with most audio amplifiers, the ST-70 uses a signal called Negative Feedback (NFB), taken from the audio output, which is then fed back into the audio input circuit of each channel to correct for distortion. NFB is a “control loop,” and is always working to correct the audio signal, to minimize distortion. A compromise Dynaco made was to use the 16-Ohm output for the NFB signal for all speaker impedance’s. This is fine if one is using 16-Ohm speakers, but what if you are using 4- or 8- ohm speakers? The 16-Ohm NFB circuit is not optimized for the lower speaker impedance’s, meaning the distortion products are not properly compensated for, which can lead to distortion in the amplifier and in extreme cases can impact overall frequency response and bandwidth performance. The NFB Selector corrects this by using a correction circuit that has all 3 speaker impedance’s available to properly compensate for NFB, providing the proper feedback signal correction for any 4-, 8-, or 16-Ohm speaker. One simply sets the selector for the desired speaker impedance and your Dyna Ultimate Amplifier will provide the lowest distortion signal correction for the speaker impedance used. It’s simple, easy, safe, can be done in a matter of minutes, and does not require one to work inside a powered amplifier; installation and NFB change can be made with no power to the amplifier. Does it matter? / Does it really work? We promise, if you are using the 16-Ohm Output from the A-470 as your NFB signal source in your Dyna-70, you will hear & sense an immediate improvement in sound output if you install the NFS system in your amplifier and your audio system speakers are 4-or 8-Ohms. If you use a 16-Ohm speaker system, continue to use the 16-Ohm terminal for both NFB and to drive your 16-Ohm speakers. However, remember to use the NFS to select the proper NFB signal should you change from 16-Ohm speakers and set for the speaker impedance you will be using, whether 4- or 8-Ohms. The NFS upgrade kit comes with 2 PCB’s for left & right channels, as well as all components to assemble and install the NFS. We have the NFS upgrade kit in stock and ready for installation in your Dyna amplifier- only $39.95 + S&H. NOTE: The NFS Upgrade Kit is not compatible with a standard Dynaco ST-70 with a stock PC-3 PCB and 7199 tubes. The NFS Kit is designed for use with the Miller Audio Dyna-70 & Dyna-120 Ultimate audio systems. Our NFS kit is also compatible with upgraded ST-70’s that use the VTA / tubes4hifi.com PC-3 PCB with 12AU7 or 6SN7 tubes. From Miller Audio, “We Bring the ST-70 into the 21st Century”
snowrunner.lt is the best online shopping platform where you can buy Negative Feedback Selector- for Dyna-70 & -120 Ultimate ST-70 Audio Systems from renowned brand(s). snowrunner.lt delivers the most unique and largest selection of products from across the world especially from the US, UK and India at best prices and the fastest delivery time.
snowrunner.lt helps you to shop online and delivers Descente to your doorstep. The best-selling Descente on snowrunner.lt are: Men’s s Descente Black Ski Snow Pants RadiPant Size 30R Henri Charles Colsenet HCC Descente Vintage Bomber Jacket Size M DESCENTE Snowboard Ski Jacket Mens Sz M Red Zip Pockets Waterproof Winter Snow Vintage Descente Shirt Mens Large Paisley Ponte Vendra Inn & Club Golf Golfer Eddie Bauer Down Puffer Jacket Mens Medium EB800 First Ascent Packable Hooded Descente Pause Hooded Half-Zip (M) descente ski jacket Descente Vintage Small Women’s Short Sleeve Made in Japan Cycling Jersey Descente Running Women’s Black Pull on Thermal Running Leggings Base Layer Sz 2 Descente Running Hoodie Jackets Size S Womens Black Logo Long Sleeve Sports Youth Junior Ski Snowboard Jacket Descente Snowboard Size J14 DESCENTE 1/4 Zip Womens Pullover Red white Running Jacket Size Large c25 Descente Sweatshirt Mens XXLarge Crewneck Mercerized Cotton Soft Sweater DESCENTE Cart Bag Monogram Pattern Dobby Weave with Shoulder Strap Golf DQCXJA42 Descente Chinook Windbreaker Cycling Jacket Sz S – Damaged Descente Mens Pullover Convertible Windbreaker Large Black Grid Golf 90s Y2K Vtg NWT!! Descente Youth Recco technology Ski / Snowboard Jacket Size 16 Snowbasin Descente International Collection Polo Shirt Egyptian Cotton Beige Black Men M descente jacket Vintage 90s Descente red metallic puffer ski snow snowboard coat winter jacket Japanese 80’s Cycling Jersey Descente Women’s Pink Long Sleeve Pullover, Size M Descent Vtg 90s Descente Cycling Jersey Bike Bicycle Size MD Tour De France Descente cycling shirt Descente Pants Men 34 Adult Black Chino Pleated Casual Pure Wool Trousers Golf DESCENTE ~ Men’s Long Sleeve Base Layer / Cycling Jersey ~ Size M With Hoodie Descente Women’s Zip Performance Outdoor Jacket Red Black Small Vintage 90s Vertical Descent Ski AOP Crewneck Sweatshirt Size XL Magic Johnson T DESCENTE Mizusawa Down Anchor Jacket Men’s Outerwear Yellow M DESCENTE GOLF Cart Bag Straw-like Material Ring Included DQCXJA43 Women’s Descente Ski Jacket Mens Small Black Fox Sports Net Rocky Mountain Snow Ski Coat DESCENTE ALLTERRAIN Oversized Mountaineer DAMWGK32U Black XO 20018813 DESCENTE Sleeveless Tee Dry Zone Tank Top Mens Large Red Reflective NWTS Descente Mercerized Egyptian Cotton Golf Polo Gray Plaid Checks Men’s Large A Beast’s Descent Into Love by Rui Asajima / New Yaoi Manga from TOKYOPOP MICHAEL TURNER FATHOM BLUE DESCENT 2 C LE RI VARIANT COMIC SCHWARTZ 2011 NM Lot of 3 Vintage Cycling Jersey Shirt Descente Le Coq Sportif Baleno Club Descente Brand Jacket Size Medium (50) Blue Full Zip Pockets Insulated Coat Mens Panorama Kodak, Descent of the Danube Philip VIII Duke of Orleans Vintage silver pr Vintage DESCENTE Ski Snow Winter Jacket Men’s Size Medium Stowable Hood Men’s Descente DNA Size Small Green Winter Ski Snow Jacket Fishbone Frank Herbert / Direct Descent 1st Edition 1980 Vintage Descente Ski Windbreaker 1/2 Zip Hooded Jacket / Coat Teal Blue Size XL Descente TERRO Ski Jacket Size: USA M NEW regular fit Descente GOLF, Recycled Polyester Mélange 4-Way Stretch Panel Pleated Skirt HELLBOY IN HELL THE DESCENT HC (2014) CONVENTION EXCLUSIVE MIGNOLA DARK HORSE Descente Vintage 90’S neon ski snowboard jacket Marc Garcia SZ L (M7142) Vintage Descente Down Winter Ski Jacket Young Women’s Size 12 Teal 1980s Canada Descente Ski Snow Black Jacket Hooded Mens Medium Vntg Descente Polyester Cycling Logo Cap Unisex Adult White One Size Japan 2023 Spring/Summer Srixon By Descente Men’S Golf Hideki Matsuyama Pro Model Defo Descente Polo Shirt Mens L Large Gold Blue Diamond Short Sleeve Golf Pull Over DESCENTE DNA CYCLING & SKIING CLOTHING VARIOUS SPONSOR LOGO STICKER DECAL, NEW! Descente Ski Snow Snowboarding Jacket Men’s Size XXL Black S6-8629 Hooded YUGIOH Ultimate Rare Miraculous Descent EOJ-EN058 Eddie Bauer First Ascent Mountaineering Primaloft Brown jacket Size S women’s Women’s Descente Blue Cycling Zip Up Jacket Mesh Windbreaker Lightweight Medium VTG 80s 90s Descente Rattlesnake Skin Beige Tan Golf Polo Shirt Mens L EUC Descente Black Nylon Ski Snowboard Pants Men’s Size 34 Vintage Descente CSC RIIS cycling team men’s zip front sweater jacket, size M Eddie Bauer First Ascent Pertex Quantum Reversible Quilted Full Zip Jacket L MTG Descent into Avernus Commander Legends Battle for Baldur’s Gate 169 Non-Foil Descente Ski Jacket Size 14 Junior Functional Sport system Heat Navi Unisex Descente Switzerland Olimpic Swiss Team Down Jacket Puffer Mizusawa Down Descent: Legends of the Dark Hybrid Centurion Promo Figure 1878 magazine engraving ~ JESUS’ DESCENT FROM THE CROSS Descente Jacket M Medium US Ski Team Snow Retro Blue Red White Vintage Japan Armenia MNH** 1993 Mi 220 Scott 458 Ivan Aivazovsky Noah’s descent mount Ararat Descente Womens Size Large Short Sleeve Cycling Jersey Shirt Underwater Reef Descente Ski Pants Mens US 40 Brown Insulated Ski Snowboarding Sporting Goods Descente Jacket Womens 8 Purple Teal Vintage 90s Retro Winter Ski Coat Bomber Descente Boys Winter Coat Size: 16/160 Hooded Zip Ski Snowboard BACK TO SCHOOL Direct Descent Descente Men’s Zip Sherpa Fleece Jacket Black Gray Sz M DESCENTE Down Jacket / Down Vest Black S 2200407903012 vintage Descente Team CSC cycling jersey Men’s Medium full zip Riis Julich Descente 1/4 Zip Ski Snowboarding Outdoor Long Sleeve Shirt Sweater Red Size Med Descente Golf Collection Black Brown Short Sleeve Polo Shirt Medium River Place Descente Blue Ski Parka Made Japan Vintage VERY NICE MENS DESCENTE LONG SLEEVE 1/4 ZIP PULLOVER SIZE L LARGE Descente Men’s Neon Yellow Long Sleeve Full Zip Collared Lightweight Jacket Sz L EUC Vintage Men’s Descente Metallic Blue Puffer Zip Vest Winter Ski Size Medium RARE Vintage Mens Medium Descente Warmup Jacket w Iconic Logo Style*Snazzy Color [L] Descente Down Coat Long Length Hooded pa4 Petite Large EDDIE BAUER Fleece Jacket 1/4 Zip Pullover White First Ascent Kyoto Japan Descente Baseball Mens Blue Polyester Polo Shirt Size L* /105cm Descente VTG Men Black Ski Snowboard Pants Zip Pockets Insulated Size 38 (30×32) Descente Beanie-Youth Size-Black-Wool-Embroidered Logo-Made In Canada-Read Eddie Bauer Men’s Red First Ascent Full Zip Fleece Polartec Jacket Size Large DESCENTE Women’s Cycling Swiss Triathlon Windbreaker Vest Size S Made in Japan Srixon Golf by Descente Polo Shirt Size Medium ( Listed in Japan Size ) Descente Black Insulated Ski Pants Mens 36R Winter Snowboard 36 X 30, 31 Vintage Descente International Collection Mens Shirt L Blue Black Geometric Golf Polo Legion Erinyes – Baldur’s Gate Descent into Avernus #23 D&D Dungeon Miniature Vintage Descente Ski Jacket Adult Large White Skiing Winter Coat snow boarding Srixon Golf by Descente Polo Shirt Size Medium ( Listed in Japan Size ) DESCENTE Women’s Down Jacket Cream Ivory DIA3590WU Size 8 /S Repair Descente Allterrain Cool Dot Packable Jacket Size S DXV55 Vintage Descente Ski Winter Jacket Parka Hood Full Zip Men’s Gray Size Medium Descente Womens Collared Fur Trimmed Hooded Zipped Long Sleeve Coat Beige Size 6 Mens Pullover Fleece Hoodie