SKU: 72012111009

Inakustik Referenz NF-2405 AIR Pure Silver XLR Interconnect Cable

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Description

Inakustik Referenz NF-2405 AIR Pure Silver XLR Interconnect CableNF 2405 AIR Pure Silver XLR "Point to point Air Helix for authentic sound. Air as the ultimate dielectric minimizes capacitance Cross Link Super Speed waveguide for a balanced sound XLR connectors can be adjusted by + 45 degrees Pure silver conductors: Under normal conditions, silver is the best electrical conductor. Our AIR cables have already caused something of a sensation in the world of high end connections: The best cable ever connected here

NF-2405 AIR Pure Silver | XLR

  • "Point-to-point Air Helix” for authentic sound.
  • Air as the ultimate dielectric minimizes capacitance
  • Cross Link Super Speed waveguide for a balanced sound
  • XLR connectors can be adjusted by +/- 45 degrees
  • Pure silver conductors: Under normal conditions, silver is the best electrical conductor.

Our AIR cables have already caused something of a sensation in the world of high-end connections: “The best cable ever connected here between amp and speakers!” (AUDIO 02-2020| LS-2404 AIR PURE SILVER). With the NF-2405 AIR Pure Silver, the analog member of the AIR family is now also available as a pure silver cable.

AIR technology is a milestone in our more than 46-year company history and is causing a sensation in the hi-fi industry worldwide. The approach itself sounds relatively banal: The physically induced losses must be minimized in order to transmit the original music signal as authentically and neutrally as possible. And, thanks to the AIR technology, loss-free transmission is closer than ever before.

It leads to significantly better sound reproduction, which is not only subjectively audible but also objectively measurable. The insulation (or dielectric) of the AIR cables is practically perfect thanks to the air insulation, and hardly affects the sound at all. The structure, dimensions and arrangement of the conductors are optimized, and approach the limits of what is physically possible.

Adding another highlight to this perfect audiophile foundation, we then focused on the conductor material of the cables. Copper in the appropriate purity is already a very good conductor. A superconductor, where electrical resistance is zero, would be perfect, of course. Unfortunately, superconducting materials require temperatures of at least -70 degrees. Under realistic operating conditions, the best conducting material we have is currently silver. At 61.35 S/m (Siemens pro Meter), its conductivity is approximately six percent superior to that of copper. However, this precious metal is about 100 times more expensive.

Thanks to the Air Helix design, the conductors run freely suspended through the length of the cable.

The Air Helix architecture permits signal conductors to be insulated to practically 100% by air. Special clips were developed to provide the supporting framework. Positioned at defined intervals inside the cables, these clips keep the helically-arranged conductors apart. Cable flexibility is assured by means of two struts that ensure the clips remain together but also at a precise distance from each other. This architecture is unique, bringing low capacitance and minimum dielectric losses – a true milestone in the search for open and unadulterated sound.

Our physical approach: Minimize losses for true-to-original playback.

Our Referenz AIR cables transport audio signals between source, amplifier and speaker in an authentic way and with a minimum of loss. You can enjoy music that precisely expresses the emotions of the artists at the time of recording – sensual, subtle, light-hearted or orchestral right through to full-blooded and rocking. Vocals and instruments are delivered in unadulterated form. Everything remains vibrant and full of emotive energy. Favorite tracks and pieces continue to trigger strong feelings even when you’ve heard them a hundred time over.

To the point

AIR Helix

The Air Helix architecture enables the signal conductors to run freely suspended through the length of the cable and permits signal conductors to be insulated to practically 100% by air.

The dielectric

Using air as a dielectric lowers capacitance to a minimum. In comparison with other insulators, using air as a dielectric leads to no increase in capacitance and creates no dielectric losses.

Multicore structure

By cleverly arranging the conductors in the multiply nested multicore structures, overlapping magnetic field areas are created that significantly reduce inductance.

The conductors

The Cross Link Super Speed waveguide avoids so-called skin effects and delivers a balanced sound, even with complex music passages and high volume levels.

XLR 180°

The Referenz XLR 180° connectors developed by us can be rotated by +/- 45 degrees and can therefore be optimally adapted to individual socket alignments. Cables and sockets are less stressed.

 

Point-to-point Air Helix for end-to-end connections

A new feature in the 5th generation of in-akustik’s Air Helix architecture is the point-to-point connection. Specially designed transitions are available for each type of cable and connector. Across the complete length of the cable – point-to-point AIR Helix. It may sound trivial at first, but the results are impressive. Sound signals are transported with minimized losses, right through to the final centimeters. The sound is more detailed and dynamic than even before.

The conductor structure

The Cross Link Super Speed waveguide avoids skin effects caused by eddy currents in the conductor. Thanks to the braided structure, the waveguide is able to precisely transport even extreme current peaks. A lacquer coating around each wire prevents eddy currents within the conductor and protects against oxidation. All this results in a conductor that delivers a balanced sound consisting of vibrant and never overemphasized timbres, even in complex musical passages and at high volume levels.

Pure silver conductors

Pure silver is regarded as the best conductor, delivering more detail across all frequency ranges. The charismatic sound of pure silver is primarily due to its high drift speed. Pure silver cables shouldn’t be confused with silver-plated cables. Silver-plated cables are said to lend a metallic and aggressive character to the sound, something pure silver cables never do.

The shielding

EMC interference, from sources such as mobile phone and WiFi networks, is constantly increasing. This interference impairs the sensitive audio signal. Interference occurs when signals of different frequencies overlap. This can result in unwanted distortions that have nothing to do with the original signal. Dense shielding is therefore essential to protect the extremely sensitive music signals from this interference so that even the finest details are preserved.

Cable manufacturing unit

The beating heart of in-akustik is our manufactory. This is where our success story is rooted – permeated by a congenial working atmosphere, a love of music and a passion for detail. At in-akustik, we believe musical enjoyment stems from a listening experience that remains as close as possible to the original recording and the artist’s interpretation of the piece. That’s why we boast a committed workforce that combines curiosity with a keen sense of precision. With a fascination for music and things that are really special – like the development of our complex AIR cables.

Handmade

Each cable is handcrafted with the utmost care. Our extensive know-how and the qualifications of our team enable us to manufacture the complex cables in a customized manner. Apart from the finest of materials, our most important resource is the manual dexterity of our cable assemblers. In assembling our outstanding cables, they demonstrate meticulousness, composure and dedication.

Rigorous quality control

We manufacture in accordance with the highest standards. Rigorous quality control is carried out before, during and subsequent to assembly. We verify the tolerances of ever individual component. At every stage of manufacturing, we check the configuration and electrics for short-circuits. We also conduct functional and mechanical testing. No product leaves our manufacturing unit without a final quality check.

Did you know...

...that our NF-2405 AIR Pure Silver RCA SL (2 x 1.5 m) is made up of 195 individual components? The pure silver wire used is 1,109 m long, and the PE monofilament is 388 m long. Containing 296 drill holes, the Air Helix design of this cable type demands great dexterity on the part of the assemblers when they’re threading through the conductors.


XLR 180° connector

Conventional XLR connectors are designed for fixed positioning, which often forces the cable to twist. This load causes increased mechanical stress. In contrast, our proprietary XLR 180° connector offers a unique and adjustable alignment that allows the connector to be rotated within a range of +/- 90 degrees. This flexibility not only reduces the mechanical stress on the cable, it also enables optimum alignment of the cable in relation to the device sockets, which are often arranged differently from device to device.

Rhodium-coated

The best cable requires optimum connection technology. We use tellurium copper, a harder metal alloy that maintains the high conductivity value. Much superior to that of brass connectors. The rhodium coating ensures long-lasting contact and corrosion resistance. The stable conductivity is even maintained with frequent conversions. This is better than gold contacts, which wear out quicker.


PE network jacket

Most cables have a PVC sheath surrounded by a textile or plastic braid. This sheath is meant to protect the cable from mechanical damage. At in-akustik, we deliberately don’t use a PVC sheath in order to avoid capacitance and any consequent dielectric losses. The sheaths for AIR cables are made of polyethylene monofilaments. These hold the conductors tightly together, reduce microvibrations and allow extreme dynamic peaks to be processed in an unadulterated fashion.

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: 72012111009

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Pail
Battle Creek, US
★★★★★ 5
My dog loves this toy!
Color: Green
I was NOT expecting my dog to like this toy, but she loves it! The legs are stretchy and the body vibrates. The battery lasts about a month.
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Reviewed in the United States on June 8, 2026
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Amazon Customer
Louisville, US
★★★★★ 5
Great interactive toy. Worth the price.
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Our Lab absolutely loves it. She throws it all over the house. It’s so fun to watch her play with it. It’s by far her favorite toy right now. It’s easy to charge and came with charging cable. It has a button to turn off and on and a couple different speeds. My parents got her a different one for Christmas and since she loved it so much we decided to get her another one. It’s pretty durable too. She normally rips through toys pretty quickly and both of the ones she has are still in good shape. No rips or tears. She hasn’t tried just chewing on it like she does her squeaky toys. She just throws it all around the house and chases it.
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Reviewed in the United States on March 17, 2026
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Jeremy Elston
Belleville, US
★★★★★ 4
Fun, enticing dog toy. As stated in description it won’t hold up for aggressive chewers
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Rating this based on description. My dog loved this toy. It was smaller than I had pictured in my head, but that was on me. I did read the description ahead of time, which clearly states this is not for aggressive chewers. My dog is trained not to rip toys apart so I wanted to give this a shot, but i guess just her jaw strength and teeth were too much. She carried it everywhere. I turned it on periodically. The movements are small, but enough for her to be captivated with the toy. It did mostly survive for about a day before I needed to take it away due to the Velcro opening. Once it started to pull apart she did chew a piece of the Velcro off. It might be helpful with a flap over design covering the Velcro. I have a singing Santa decoration like this where the Velcro is covered up and I have to pull it back a little to get to the Velcro opening. The gaps on the sides of the closure are a bit to large making it tempt my dog to pull and open it up. I wish there was a more durable option that could hold up to aggressive chewers, but this product was clear about that in the description. I think the opening to the batteries could use some improvement. Granted I do not have the perfect answer to fix this, but I am also not a toy designer.
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Reviewed in the United States on April 19, 2026
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Amazon Customer
Battle Creek, US
★★★★★ 5
My Dog Went Crazy Over This Electric Octopus Toy!
Color: Blue
I was worried sick my fur kid would be super bored home alone while I work, so when I stumbled on this electric octopus toy, I grabbed it right away—and it’s way better than I expected! Let’s start with the quality: the plush fabric feels soft and squishy but so sturdy. It’s not the cheap kind that sheds fur if you tug it, and the stitches are nice and neat. My dog loves chewing on toys, and he’s been playing with this for almost two weeks now—no pilling, no fraying. The durability’s seriously on point. Using it is totally hassle-free, too. It was already charged right out of the box—I just pressed the little button on the side, and it started moving. It has two modes: slow mode makes the octopus wiggle gently, like it’s crawling slowly. Fast mode? It wiggles and scurries around, and the speed’s perfect—my dog can keep up but still has to work a little. When he first saw it, he circled it three times, sniffed it, then backed up right away. He stared at it all cautious, even hid under the couch to spy on it for a bit. That little look was so funny and cute, I couldn’t stop laughing. Now they’re total best buds! Every morning, as soon as I turn the toy on, he runs over with his little bed in his mouth and plops down next to it, waiting for it to move. Sometimes the octopus crawls under the table, and he’ll paw at it for ages. If he can’t reach it, he’ll look up and bark at me like, “Hey, help me get it!” Watching him chase it around, jumping to pounce—his tail wags like a little flag the whole time. It makes the house feel so much livelier, and I don’t have to stress about him being lonely when he’s home alone anymore. Quick tips for all you fellow pet parents: First, the toy makes a tiny motor hum when it moves. It’s not loud, but if your dog’s super skittish or scared of small noises, give him a few days to get used to it. Second, always keep an eye on him while he plays. Mine tried to bite off one of the octopus’s tentacles once—I stopped him just in time. The toy has a motor inside, so you gotta make sure he doesn’t swallow any small parts. Oh, and the plush cover zips off! If it gets dirty, just throw it in warm water, wash it, and once it’s dry, it looks good as new. Super easy to clean. Overall, this electric octopus toy’s the best pet buy I’ve made lately. Great quality, no hassle to use, and it keeps my dog entertained for hours. Every time I see my fur kid’s happy little face while he plays, I think, “Man, this was totally worth the money.” Def recommend it to anyone who wants a fun little buddy for their dog!
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Reviewed in the United States on August 26, 2025
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Amazon Customer
Bozeman, US
★★★★★ 5
Good quality and safe for my pet! Lots of fun to play with!
Color: Blue
Worth buying for your pet! My American Bulldog wouldn’t leave it alone !
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Reviewed in the United States on June 11, 2026

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