SKU: 32201795873

Inakustik Reference NF-4005 AIR RCA Interconnect Cable

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Description

Inakustik Reference NF-4005 AIR RCA Interconnect CableNF 4005 AIR RCA "Point to point Air Helix for authentic sound Air as the ultimate dielectric minimizes capacitance Cross Link Super Speed waveguide for a balanced sound The RCA SL connectors are pressure grouted using a force of 1. 5 tonnes for a precision fit Good sound needs space! In developing our Air technology, we have proven that an audio cables insulation plays a decisive role and has a significant influence on the sound. This is due to

NF-4005 AIR | RCA

  • "Point-to-point Air Helix” for authentic sound
  • Air as the ultimate dielectric minimizes capacitance
  • Cross Link Super Speed waveguide for a balanced sound
  • The RCA-SL connectors are pressure-grouted using a force of 1.5 tonnes for a precision fit

Good sound needs space! In developing our Air technology, we have proven that an audio cable’s insulation plays a decisive role and has a significant influence on the sound. This is due to dielectric losses and the electrostatic properties of the insulating materials, which burden the hi-fi system like heavy luggage and make it sluggish. By “omitting” this strain we then help the entire hi-fi chain to achieve top performance. We do this with special clips that guide the signal conductors through the cable in a row and freely suspended.

A cable’s geometry also influences these factors. Bigger distances mean less load. This is exactly where our NF-4005 AIR comes in: The AIR helix design and the cable’s dimensions create even more space and air between the signal conductors. The cable thus forms a wide audiophile corridor and rolls out the red carpet, so to speak, for every sound detail.

New RCA SL connectors (SolderLess): Soldering is a proven and established connection technology, but it is not without its weaknesses. These include the solder used in the signal path, which reduces the conductivity, and the generation of thermal voltages, even if it is kept to a minimum. With our recently developed SL (SolderLess) RCA connector, the connections from the signal conductor to the contact element are pressed with the highest precision and with a pressure of 1.5 tonnes. A further seemingly tiny improvement that brings great rewards in terms of audio performance.

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.

Pressure-grouted contacts

The connectors are pressed directly into the conductor material of the cable using a special tool with a force of 1.5 tonnes. Contact resistance and other negative solder effects are avoided.

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.

The conductor material

The conductor material is a crucial factor for the transmission of sound signals. Any contamination worsens the conductance and increases the background noise. We only use pure, oxygen-free copper in our AIR cables. We ensure that only carefully selected batches of pure copper are processed. We take great pains to measure the quality of the copper before it is sent to the mill for drawing to the required cross-section over the course of a multi-stage process.

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.

RCA SL connectors (SolderLess)

Soldering is a reliable and well-established joining technique, but it has its drawbacks. Disadvantages include the presence of less conductive solder in the signal path and the emergence of low thermoelectric efms. The RCA-SL connector of our fifth generation Referenz AIR cable NF-2405 is now also pressure-grouted from signal conductor to contact elements with 1.5 tons, like all other Referenz AIR cables. A further seemingly tiny improvement that brings great rewards in audio performance.

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.

Pressed contacts (1.5 tonnes)

The contact elements of the connectors are pressed directly into the conductor material using a special tool with a force of 1.5 tonnes. This creates a stable and reliable connection without the use of solder or ferrules. Transition resistances and negative effects are avoided to ensure optimum signal transmission.


Shipping Notes
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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: 32201795873

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4.3 ★★★★★
Based on 11 reviews
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Paula
Charlottesville, US
★★★★★ 5
Oooooh this little guy packs a punch!
Color: Black01
I dont know what the heck took me so long to get this little gadget. I absolutely love it and now can't imagine being without it. I can't compare it to the other big names, I just simply can't afford those! But I can tell you this little guy packs a huge punch on results! 1st I must tell you my house is vey small, maybe 1600sq ft inside, only 2 bedrooms. I have no foot traffic at all. No kids. No pets, No shoes inside-sorry thats just the way my husb & I live. So I run my Robo 2 times a week only and he still picks up massive amounts of lint, rug fibers, dust etc.... Programing is super simple, easy to change plans, various options on suction and tweaking the areas you want covered. Robotic absolutely fabulous. Don't be sketched-out on its price point. Seriously its low price is freakin worth it! Like I said I dont know how it would compare to Roomba, and I actually dont care because Roborock is amazing!!! Love Love Love it!!!!
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Reviewed in the United States on March 21, 2026
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Verified Purchase
Nurhan Barsamyan
Dallas, US
★★★★★ 1
“Terrible Product, Even Worse Support
Color: Black01
Roborock vacuum has been nothing short of exasperating, and after more than ten days of back‑and‑forth with customer support, I can confidently say this is one of the most disappointing purchases I’ve made in years. What should have been a reliable, premium home appliance turned into a daily source of frustration, and the company’s customer service only amplified the problem. The core issue began when the vacuum repeatedly failed to complete its cleaning cycle. Instead of finishing the job, it would stop randomly in different rooms and display an “interrupted by user” message — even though no one had touched it. Firmware was up to date, the environment was unchanged, and the vacuum had been working fine before. The problem was clearly internal, whether hardware or software, but the device simply refused to function as advertised. Unfortunately, the product’s shortcomings were only the beginning. The real ordeal started when I reached out to Roborock’s customer support. Over the course of nearly ten emails, I received little more than generic, repetitive responses that did nothing to diagnose or resolve the issue. Each day brought a single, unhelpful reply asking for information I had already provided or requesting steps that were unnecessary because the malfunction was already documented in the app. The vacuum’s cleaning history, error logs, and behavior patterns were all visible on their end, yet they continued to push the burden back onto me. Instead of meaningful troubleshooting, I was met with delays, scripted messages, and requests to redo the same tasks over and over. At one point, they asked for logs, screenshots, timestamps, and device information — all after I had already spent days explaining the issue in detail. It felt less like support and more like a slow, circular process designed to wear the customer down. After more than a week of this, I finally reached my limit. I had purchased a premium product expecting premium reliability and service, but what I received was a malfunctioning vacuum and a support experience that left me feeling ignored and undervalued. I eventually gave up entirely and bought a replacement from another brand just to end the frustration. By the time Roborock finally offered a replacement, the damage was already done. The trust was gone, the patience was gone, and frankly, the brand loyalty was gone. A company’s true character shows when something goes wrong, and in this case, Roborock failed spectacularly. In the end, the vacuum didn’t just stop cleaning my floors — it swept away any chance of me ever purchasing from this company again. Between the unreliable product and the painfully slow, ineffective customer service, I cannot recommend Roborock to anyone. There are plenty of other brands that value their customers and stand behind their products. Sadly, Roborock is not one of them.
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Reviewed in the United States on March 25, 2026
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Verified Purchase
texas0987
Birmingham, US
★★★★★ 5
Robo vacuum gets the job done
This is our first robot vacuum so I don't have anything to compare it to other than what friends have said about theirs. I got this on sale for around $150. Definitely worth the price in my opinion, our floors are cleaner now! This is the Q5Pro (Q5ULE) model. This one has the features of vacuum, mop, map(with split and merge options), zones, spot clean, joystick/remote controls, no go zones, and scheduling. Wifi setup took a couple tries. But I think that shouldn't be a problem for a lot of people. It worked fine after I turned off the VPN on my router so something was being blocked there. It was easy to follow the quick start instructions that came in the box and the directions were accurate. The app (I have android) is pretty simple and easy to use. I put it on my kid's phone also so they can use it as needed. Used the same login as my own and it logged me out on my phone, but once I logged back in was able to have it logged in on two devices with no issues. It will ping you when a scheduled task is completed and if it was able to complete it or ran into issues. The history feature is nice as you can see a track of where it went. It shows yellow icon in the history if there was an issue like couldn't reach a room or something else. I told it to spot clean but it wasn't cleaning well, so I turned it over and found a twist tie in the rollers. Got that out and it did fine after that. There is a page in the app that tracks how long till expected maintenance for the the rollers, brushes, and sensors. We have two dogs and two people with long hair so we'll have to use a seam ripper regularly to get hair off the roller ends to keep that from accumulating. It's easy to get things out of the rollers, and put them back in. You can't put them in wrong as the black and red have different shapes on the ends. The rectangle roller cover is slightly difficult to put back on, you have to hold the spring clips open so it goes back on. Suction seems to be powerful and there are different suction settings in the app as well. It doesn't always get everything but love that it vacuums better than the job the humans were doing most of the time. Mainly has missed some larger lightweight crumbs that got flung by the arm brush and didn't get everything by the edge of the area rug on the 1 pass setting. We had party confetti of the foil variety and it got some of that up but didn't get all of it. The charging dock is just too tall (3 7/8 inches) to go under our sofa so we'll have to figure out a good place to 'hide' the dock. The vacuum itself is about 3 1/2 inches tall in including the round port that sticks up on top. (The round port is for suction I believe, it's not sensors) It finds the dock fine, hasn't gotten lost even when moved during cleaning. Charging is good and the app lets you sent peak/off peak charging times so it will keep it alive during the day but fully charge at night when power costs less. Overall seems like a great vacuum. It already (less than a weekof ownership) has scuffs on the outside from rubbing on things but I have kids and they constantly move chairs, etc so it has to relearn things all the time. It is impressive in that it will lightly bump/brush but even in joystick mode it won't let you ram into things, it slows itself down before it touches anything. I haven't tried out the mopping pad yet, it comes with a pad, water tank, and a plastic floor protector to put under the dock to keep damp off the floor until you take the mop pad off. I'm not thinking it will be super impressive as it's just going to drag a wet cloth around but I may be wrong. Will update when I've tested. Time will tell how sturdy and robust it is but it seems to be good so far! Edit to update: it's fine with the mopping but not a true mop, it's dragging wet and leaves wet streaks, better than nothing. We may use it some but with the steam mop I know it will actually get it clean. I moved the dock more than 3 inches and had to remap because it threw it off. Once before I moved the dock just a smidge but more than 3 inches is too much. If the battery gets below 20% it will return to the dock to charge, then will go finish at some point. I didn't find out what % of charge triggered the return to work. Had it for over 3 months now and use it daily. It does good overall, happy with our purchase.
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Reviewed in the United States on February 17, 2025
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Verified Purchase
Arianna
Belleville, US
★★★★★ 4
Not a great mop, but it is a great vacuum.
Color: Black01
The Roborock Q7 L5 has been a great addition to the cleaning arsenal of my home. I have a 1200sqft one story home with tile and laminate flooring, and it has essentially removed my need to vacuum every day, or even every week, and I have 6 cats. I have had it set to vacuum every night in the common areas of my home, and it is quiet enough that it does not disturb my husband and I when we are sleeping. I only have to empty it out once or twice a week. You MUST make sure your common areas are cleaned up of debris on the floor, and to set no-go zones where you cannot clean up clutter on the floor. It WILL eat cords, shoestrings, animal toys, etc. It WILL get stuck under things, which are where no-go zones come into play. It struggles with cleaning up litter, so I still have to sweep the floor around my cats litter boxes. However, it picks up the cat hair fairly well. It also crosses thresholds VERY well, and will vacuum my area rugs and shower mats that are not affixed to the floor with tape without sucking them up like a normal vacuum does. Some complaints I do have with this model... - It CANNOT be integrated into Home Assistant at this time, which was one of the things I was excited about. Something about a new firmware they started using that is not compatible with the integration starting around this model type. Unfortunate, but whatever. - The mopping function leaves more to be desired. If you put water in the unit, it WILL leak, even if you don't have the mop mount installed or are mopping, so sometimes you end up with little water drips on the floor. I also find that it does not do a very good job at mopping at all, even with wetting the cloth first, but for tile and laminate flooring, dry mopping is fine, so I have been leaving the mop mount installed without mopping to pick up dirt and dust that the vacuum part misses. - The filter was installed incorrectly from factory, and it took me a few weeks to realize that. I have no idea how much dust got sucked up into the motor, so definitely check that when you first get it. - The mop cloth is poorly sewn. It maybe lasted two uses before it started falling apart. Fortunately, I sew, so it can be easily fixed, but I would have hoped that these would have been a little more high quality. - Expect to buy more replacement parts. Especially mop cloths. You will need multiple mop cloths if you are using the roborock to mop with. Overall though, most of my complaints are with the mopping function of this machine. Since I don't mop very often anyway, due to damaged laminate flooring, it works fine for me. Not having to vacuum the entire house every day, or sweeping the kitchen manually every time after I cook is a huge time saver. If you need a robot vacuum, and not a mop, I feel like the Roborock Q7 L5 is a great purchase.
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Reviewed in the United States on December 1, 2025
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Verified Purchase
DW
New York, US
★★★★★ 5
Strong Vacuum Performance, Weak Mop Function
Color: Black01
The Roborock Q7 L5 delivers strong vacuum performance. The suction is powerful and picks up pet hair, dust, and debris with ease. Floors look clean after each run, and the dual anti‑tangle system helps keep the brush clear even in homes with heavy shedding. Navigation is smooth and efficient. It moves around furniture accurately, avoids obstacles well, and returns to the dock reliably when it needs to recharge. The mopping feature is quiet, which is a nice benefit. It operates with very low noise, but the cleaning action is minimal. The mop pad mostly drags behind the unit and offers only a light wipe, so it doesn’t replace a real mop. The vacuum itself is louder, which is expected from a machine with strong suction. It offers different suction levels, so you can adjust the noise and power depending on the room or flooring. What stands out: Excellent suction power Great at picking up pet hair Smart obstacle avoidance Quiet mop function Multiple suction levels Reliable self‑charging What could improve: Mop function is weak Vacuum noise increases at higher suction levels Overall, this is an excellent vacuum with strong cleaning performance and smart features. If vacuuming is your priority, it’s a great choice. The mop is more of a bonus than a true cleaning tool.
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Reviewed in the United States on January 23, 2026

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