SKU: 32567282030

Fosi Audio IM4 10mm Dual-Cavity Dynamic Driver IEMs

Sale price$84.01 Regular price$93.34
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Description

Fosi Audio IM4 10mm Dual-Cavity Dynamic Driver IEMsFeatures: >High Performance Dynamic Driver IEMs. >Dual Magnetic Dual Cavity Dynamic Driver. >High Purity Beryllium Plated PU Suspension Diaphragm. >High Strength Neodymium N52 Dual Magnets. >Dual Chamber Construction. >CNC Machined Aluminum Alloy Cavities. >Open Back Shell Design. >High Efficiency Acoustic Damping. >Two Sets of Swappable Nozzles. >Ergonomic Design for Comfortable Fit. >5N OFC Silver Plated Cable. Technical Information: >Impedance: 21.

Features:-

>High-Performance Dynamic Driver IEMs.

>Dual-Magnetic Dual-Cavity Dynamic Driver.

>High-Purity Beryllium-Plated PU Suspension Diaphragm.

>High-Strength Neodymium N52 Dual Magnets.

>Dual-Chamber Construction.

>CNC-Machined Aluminum Alloy Cavities.

>Open-Back Shell Design.

>High-Efficiency Acoustic Damping.

>Two Sets of Swappable Nozzles.

>Ergonomic Design for Comfortable Fit.

>5N OFC Silver-Plated Cable.

Technical Information:-

>Impedance: 21Ω.

>Frequency Response Range: 20Hz~20kHz.

>Sensitivity: 109dB.

>Connector Type: 2-pin 0.78mm.

>Termination Plug: 3.5mm Gold-Plated Plug.

>Weight: 7g(per earbud).

Fosi Audio, known primarily for its portable as well as desktop HiFi audio gear is here with its very first pair of in-ear monitors, introducing the Fosi Audio IM4. It’s a single dynamic driver IEM designed with a specially-developed beryllium-plated PU suspension diaphragm. The pair features a dual-magnetic, dual-cavity dynamic driver unit with high-power Neodymium N52 magnets that provide high-efficiency and low distortion in the output. Fosi has crafted the pair with high-precision 5-axis CNC machining process using 6063 series aluminum alloy material. The shells have an open-back architecture to further enhance the sound performance with a wide soundstage. With high-efficiency acoustic damping, premium dual-cavity structure, and professional tuning, the Fosi Audio IM4 promises an enchanting sound response, one that captivates its listeners every single time!!

High-Resolution Clarity with Premium Driver:-

Fosi Audio has equipped the IM4 with a high-performance dynamic driver unit. The pair houses a dual-cavity, dual-magnetic dynamic driver unit that adopts high-purity beryllium-plated dome and PU suspension diaphragm coil. It not only produces a rich sound but also provides enchanting performance with ultra-low THD+N characteristics. The driver is placed neatly in a dual-cavity structure specially optimized to achieve a pure high-fidelity sound with the IM4.

High-Strength Dual-magnetic Configuration:-

In order to produce a high-quality sound with the IM4, Fosi Audio has designed the pair with a strong dual-magnetic architecture that utilizes high-power Neodymium N52 magnets. This dual-magnetic structure produces a strong magnetic flux that ensures swift diaphragm movement. All this results in cleaner sound output with ultra-low THD+N distortion performance. It also provides high-efficiency design to the pair, it now has an output impedance of just 21Ω.

Long-Lasting Comfort, Ergonomic Design:-

Fosi Audio IM4 has got a solid build quality, the pair is crafted using high-precision 5-axis CNC machining process. It is made up of high-quality 6063 series aluminum alloy material. The pair is designed in an ergonomic shape to ensure solid comfort, we also have open-back design with grill vents available on the face panel area. With this open-back design, Fosi ensures the IM4 has a massive soundstage profile.

High-Purity Stock Cable, Solid Accessories:-

Fosi bundles the IM4 with a bunch of high-quality accessories. We have two sets of swappable tuning nozzles, one high-purity 5N OFC silver-plated stock cable, and nine-pairs of ear tips featuring three pairs each of Balanced Sound, Bass Sound, and Deep Bass Sound variants.

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: 32567282030

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4.3 ★★★★★
Based on 11 reviews
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Verified Purchase
OKCSteve1
Alexandria, US
★★★★★ 5
Color me impressed!
Compact, high quality unit, SUPER easy ink refills, great value, fast print and good color. I've lived with 2 printers and moved them between 5 states. A laser printer for good, fast, low cost prints and an all in one ink jet. It was a total pain, they were both big, both have me headaches, heavy and I needed 2. FINALLY, FINALLY I have 1 printer to replace both, do anything I might need and the ink refills MAKE SENSE! Imagine that?! Haha. A printer that doesn't come with just enough ink to print a test page, but comes with 2 full years with of COLOR ink! This is the way forward and thank you HP for going this route. The idea that buying a new printer is cheaper than buying ink refills warms my heart because there are so many printers that end up in landfills, not to mention how much of a consumer headache it is. I will say that I had concerns regarding color print quality and that it might be messy to refill. I'll put your mind at ease - impressive color print quality, speed and adding ink couldn't be easier! (Idk how this printer would travel while full, but everything seems tight and sealed) Overall I couldn't be happier with the end result. The cost, functions, ease of use and low ongoing ink cost are 100% with it in my opinion. I forgot to mention that I've never found a personal or work printer that was easy to use wirelessly. I'd have a headache adding the printer to my PC or couldn't get a crappy app to work. Once I did, I'd get error codes or a jam... Idk, I'm very techy but that's been my experience. This HP worked without issue and the app was very straightforward. I haven't tried advanced options but it does what I need... It just works! I did try scanning and they was fast and easy as well. I have the printer on a 6ft hutch, so fingers crossed everything continues to work and I won't have to bust out the step ladder 6x like I used to.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 9, 2024
J
Verified Purchase
Jordan P.
Alexandria, US
★★★★★ 5
I started my own photo printing shop
Having a printer that performs this well has been great. Setting it up was easy to do with the included instructions. I already have a color laser printer which I use all the time, and you may be wondering why I would go buy an inkjet printer. Photos. You can't print on glossy paper with a laser printer very well. All the photo paper I've purchased clearly says it's for inkjet printers. While this hasn't stopped me from trying. The results have been very poor. Especially if you want to cut the photos to specific sizes. Little bits of toner get everywhere. I've been putting off getting an inkjet because the cartridge system is too expensive and messy. I got more ink on my hands pulling the stickers off the refills than filling every tank on the HP 7602. This printer has all the features you would expect such as Wi-Fi, flatbed scanner, automatic document feeder, 2-sided printing, and even an ID card copy function. If your business provides financing this is something that would really make things easy for you. My wife and I print photos from our phone using the HP Smart app or the phone's default printing app and both produce excellent results. The photos are where you would expect them to be, and the quality is as good as getting them from the pharmacy. Like I said I have a laser printer, but I was curious how this would work just printing some regular documents. It’s not quite as fast obviously but the results are just as good. I love the user interface that is so seamlessly placed into the front bezel. Unless it’s telling you something you would never know it was there. This Printer checks a lot of boxes for me and was 100% worth the investment.
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Reviewed in the United States on January 21, 2024
D
Verified Purchase
deing
Lexington, US
★★★★★ 1
HP Warranty: Know this before buying; Unit malfunction in less than 5 months
UPDATE: Not even 5 months using this printer and there are problems. 1 - the printer's black ink is not working. A blank paper comes out for documents printed in black ink only. The problem: the black ink is not running through the tube that connects the blank ink tank to the ink cartridge. The tube is totally clear. 2 - The ink cartridge does not move to the center when opening the printer cover, preventing access and removal of the ink cartridge. HP Tech Support: Spent about an hour with tech support for them to tell me what I already knew - the printer is defective. HP Warranty: HP is not abiding by the terms of the warranty. According to the standard warranty, HP is to first ship a replacement. To ship the defected unit back, the customer is to use the prepaid shipping label provided by HP and use the box of the replacement unit to ship the defective unit back. Without any advance notification to the customers, HP has indicated to me that this policy does not apply to Smart Tank printers. Smart Tank purchasers are responsible to bear the cost of shipping the defective unit and providing the box. Once HP receives the defective unit, they will then ship the replacement. This policy obviously extends the period the customer is without a working printer. I tried pushing back, but to no avail. Replaced a HP Officejet Pro 8600 printer. The HP 7602 takes up less space, is well made, looks nice and the printing quality is better. The printing speed is slower, which will be much more noticeable when printing multiple, double sided pages. The paper tray does not have a slider from the top to ensure that the paper stays level and in place. It only has sliders on the side. I would have liked to see an Officejet Pro 8600 equivalent tank printer. The cost of ink cartridges for regular inkjet printers can not be justified for someone that does not print much.
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Reviewed in the United States on March 8, 2025
M
Verified Purchase
Michelle Y.
Battle Creek, US
★★★★★ 5
Why didn’t I buy this sooner?
I am so happy I shelled out for the 7602. HP makes less expensive Ink tank printers but this is perfect for me. Pros: 1. The printing quality is great. I’m in the middle of a massive project that requires thousands of pages to be printed. I upgraded to 32lb paper to ensure the project would be quality, but also to handle double sided printing with images. The images with this printer and clear with zero smudging. 2. It’s fast. It said 12 pages per minute, but I’m getting more than that double sided. 3. The paper tray. The ad doesn’t go into this, but the paper tray is rad. I have terrible back pain so to sit and do a project for hours is hard enough. To have to get up to reload a paper tray sucks. This paper capacity has got to take 200-250 sheets. I grab about half the package of paper to fit a load snuggly. I LOVE this feature. 4. The cost I was worried about the reality of the savings on ink. The initial cost is over $300. However the little ink jet cartridges are between $30 to $50 each time. They run out so fast. Plus, HP changed the machines to only read their proprietary cartridges, so you can’t order a cheap fast cartridge off Amazon. I printed close to 1,000 pages last night and I’m only seeing a slight dip in the ink levels. That’s crazy. Now consider the ink. The bottles are designed so they fit over the loading tube. No mess. I was worried about this because I am a stone cold clutz. I did spill a drop of blue, but I was moving fast. The bottles have a plastic top the presses into the tube creating a seal. Imagine when you pull a gas nozzle out of your tank. If you are in a rush you might drip gas on your car. This is the same. You pull the bottle up slowly allowing the plastic barrier to seal. I just whipped off the bottle but only 1 drop spilled, by the tube. I haven’t tried the scanner. I will update in awhile. The only con is the paper catch. This is where the prints come out and stack up. It has a manual slide out. If you forget to pull it out your pages will end up on the floor. I’m a bit spoiled from the automatic arm that extended on my ink jet when you press print. To me that is such a small sacrifice for all the advantages. I highly recommend this printer. In the last 3 months I spent $600 on cartridges. I wish I had done this sooner!
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Reviewed in the United States on August 31, 2025
M
Verified Purchase
MS
Whiting, US
★★★★★ 4
So far a great printer
So far a great printer. Was a little worried after reading a lot of the reviews. However I was tired of ink cartridges and wanted to give the tank a shot. Heck I have 30 days to try it out with Amazon returns , so why not. Setup only took a couple minutes. Simple to read instructions, online setup guides made it quick and easy. Filling the ink tanks was painless. Installing printer heads was easy. Although was a little worried as it took a little more force the. Expecting to close the cover. Was afraid I was going to brake it. Zero problems connecting to internet. Did a test fax and worked great! Did a test scan with zero issues! Printed several test pages from cell phone and computer with zero issues. Print quality was great even with testing on plain printer paper. Only negative I have is the power cable does not connect securely and can easily come loose causing power to disconnect. Which is my reason for 4 stars as I can see how this might become an issue
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Reviewed in the United States on April 5, 2026

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