Description
Next-Generation Performance Monitoring
Monitor your performance with 64 Audio's next-generation universal in-ear monitors (UIEM) specifically designed for musicians and live music professionals. Whether you're just getting into monitoring with in-ears, not ready for customs, need a backup set, or simply prefer generic fitting products, the Aspire 4 offers best-in-class sound and ergonomics.
Unparalleled Sound Quality
With live music at the forefront of our tuning criteria, we aimed for a balanced sound profile that sits between a highly accurate studio monitor and a contoured device for effective self-monitoring. Aspire 4 features huge bass capable of reproducing some of the toughest frequencies with ease, forward mids for clear articulation, and a top-end sparkle that sets it apart from other UIEMs in its class. This powerful sound signature is a perfect blend of accuracy and musicality.
Proven Professional Heritage
Since 2010, we've crafted thousands of custom in-ear monitors for some of the world's greatest musical talents. This experience has shaped our products and technological advancements, leading to the creation of our most accessible UIEM to date. Sharing the same legendary DNA and patented technology, the Aspire 4 allows anyone to hear like a pro.
Innovative Technologies
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Stainless Steel Nozzle: Our stainless steel nozzle, paired with the molded ABS shell, ensures durability for consistent use and ear tip removal. The flange design and mesh grill prevent ear tips from falling off and keep the sound bore free of debris.
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Apex Core: Our patented pressure-relieving technology, integrated seamlessly into the earphone body, uses acoustic filters instead of pneumatically interactive foam to provide a controlled leak.
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Wave Guide: This custom-designed acoustic structure, integrated into the high-frequency balanced armature driver, increases efficiency by directing and focusing energy for crisp and clear sound.
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LID (Linear Impedance Design): This proprietary circuit corrects the non-linear impedances of the drivers, ensuring proper interaction with the source and preserving the desired sound signature.
Frequently Asked Questions
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How is Aspire 4 different from your other custom and universal models? Aspire 4 is not custom fitting and uses foam or rubber ear tips provided with the UIEMs. Unlike other models like U4s and Fourté, Aspire 4 has an ABS molded shell and stainless steel tip, and uses an IPX (T2) socket instead of a 2-pin socket. It does not feature tia™ technology but incorporates a unique waveguide for high frequencies.
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How does Aspire 4 differ from other four-driver models like U4s and Fourté? Aspire 4 features a 3-way crossover (lows, mids, highs) compared to the 4-way crossover in other models. It uses a revolutionary waveguide for the highs and is specifically designed and tuned for musicians and live-audio professionals.
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What does “Hybrid” mean? Hybrid refers to the use of multiple types of drivers: balanced armature drivers for mids and highs, and a single dynamic driver for lows.
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How does apex core differ from apex™ tech? Apex core achieves pressure relief using different internal structures and materials compared to standard apex tech. It is built into the earphones rather than being an interchangeable module.
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Can I use third-party tips with Aspire 4? Yes, any tips with a 5mm nozzle diameter will fit.
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If the cable fails, do I need to send the whole unit for repair? No, the cable is detachable, and you can purchase a new one from our website or any genuine estron IPX (T2) parts supplier.
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Why do I need to adjust the volume when switching to Aspire 4? Different IEM models have varying sensitivity specs, so adjusting the volume is normal and not an indication of quality or volume capacity.
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Where is Aspire 4 made? Aspire Products are designed, packaged, and quality checked by skilled technicians in the United States and assembled in China using globally sourced components.
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TRUSTED BY OVER 35K+ MUSIC ENTHUSIAST
Let customers speak for us
I recently got my hands on the ROSESELSA AURORA Ultra IEM, and I must say, it has exceeded my expectations! For under 2,000 INR, this IEM delivers exceptional value and performance that can easily compete with many pricier models out there.
What really stands out to me is its versatility. The AURORA shines across all genres, whether I'm diving into classical symphonies, jamming to rock anthems, or vibing with electronic beats. The sound quality is simply fantastic, making every listening session a joy.
A cherry on top is the comfort factor—these IEMs are small and lightweight, so they don’t cause any discomfort during long listening sessions. If you’ve had issues with larger IEM shells in the past, you’ll find the AURORA to be a perfect fit. Plus, the cable quality is impressive for the price, adding to the overall value of this product.
To unlock the full potential of these IEMs, I highly recommend investing in an external dongle. I personally use the Kiwi Ear Allegro Mini DAC, and it has truly elevated my audio experience. If you're on the hunt for a budget-friendly IEM that doesn’t compromise on sound quality, the ROSESELSA AURORA is a must-try!
I also want to take a moment to thank the audio store for their outstanding service. My order arrived in perfect condition, and their customer support team was incredibly friendly and helpful. Overall, this has been a wonderful experience, and I’m absolutely thrilled with my purchase!
As a v16 owner this is a worthy upgrade .
Fit :
The iem is designed aesthetically that it fits like custom made
Sound impressions :
Treble is perfectly done with being sibilant, Mids sounds very organic and clear, Bass is the best part here it's a step up from their previous flagship v16.
Staging is better and so is the resolution, A total flagship level iem which punches above the price tag
Thanks to Pritam for his exceptional customer service and deal .
Definitely recommended
Have a great features and I am very happy after buying this m71 thanks audio store 🙏🙏
Time Spent with this DAP is more than 50 days, used many IEMs from Budget range to high end.
OBSERVATION & EXPERIENCE SO FAR.
- Wide soundstage, it's creating a spacious listening experience.
- Smooth and refined sound, with good bass & trebles. I liked it.
- little high Volume doesn't hurt ears because of spaciousness which this DAP creates.
- Main unique point is Vocals & Instruments separation, it's best.
- So far, I noticed Battery back up is really good. Will check it over time and provide feedback.
- Does not get warm that too after using for hours.
- Best software & Shanling Music app, it's very fast ( I use 1TB fully loaded Micro SD card.)
Please Note - Little more care is needed while handling as it has Glass tubes. Again it's unique offering & tubes makes music more enjoyable.
CONS-
1. Charging time ( it will get solve by software updates in future, Brand has co
nfirmed it in their post)
2. Only one colour option is available from Brand.
3. Some settings currently not present, Brand may add in future updates ( DSD gain Compensation, PEQ, MSEB, Night light short cut in quick pannel)
CONCLUSION-
a. Highly recommend those who want detailed & immersive experience.
b. THREE IN ONE- One DAP but three modes, all three sounds differently. One mode Transistor (without Tubes) and two Tube modes (Triode & Ultra- linear).
Sterdy & beautiful cable. I am using it with Hidiz MP145 Planner Magnetic IEM. It add details to music over stock cable. Makes all aspect of sound quality better.
I am writing review after One month regularly uses with my two DAP - Shanling M8t, Hiby R4.
POSITIVES-
1. Best Soundstage
2. Balanced sound
3. Musical & Makes music more enjoyable to ears.
4. No fatigue despite of metal construct.
5. Weight distribution is really good.
6. Largest Magnetic planner in the Category.
7. Details & instruments separation at best.
CONS-
1. Small ears may face challenge. Plz contact team ATS before purchase. Normal ear size, No issues with fit & long usage.
2. Stock cable is good but doesn't suit this IEM.
I am using this with Divinus Auram cable, which goes really well with this by appearance as well as by performance.
CONCLUSION-
1. Very very happy with the purchase. It's my main IEM in daily music journey.
2. My suggestion is Music enthusiast must have atleast one 'Planner Magnetic IEM', believe me I found that the the songs which I am listening since decades are sounding differently with some more details with this IEM.
The KZ Castor is an excellent choice for budget audiophiles. It delivers superb sound quality that rivals much more expensive headphones, with clear highs, rich mids, and deep bass. The build quality is solid, offering both durability and comfort for long listening sessions. At its price, it’s a fantastic value, outperforming many premium options. Highly recommended!
i think it's a great choice for someone who's just starting with the "iem" audiophile thing and it sounds good pretty good for the price range, it's sound clear and crisp, the bass is a little on the lower side but nonetheless great product if you are just starting, oh and yes the delivery was fast got it in a day.
Delivery was fast and item received was in good condition
Lets get to the point, its the best budget IEM!
I have been in the IEM space for more than 6 months and I was looking for a daily driver that can handle rough use, and then Pritam Sir suggested me 7Hz G1. And it failed to disappoint me!
A nice high quality well built iem, with one of the best ergonomic design, and a proper sound isolation with tons of tip to choose from.
The iem is well tuned with proper instrument seperation and clarity, warm tuning with perfect bass and excellent soundstage compared to other budget IEMs.
If you are new to yo IEM and want to buy your first IEM, blindly go with this! Trust me you would not regret! For 3.2k, its a steal deal!
(Pro Tip: Always listen to Pritam Sir's suggestions. He is the G.O.A.T)
We had an amazing experience at The Audio Store. Pritam, the shop expert, was incredibly helpful and knowledgeable. He patiently guided us through the world of in-ear monitors, explaining all the details and helping us understand what would work best for our band, Rhythm Freak. He suggested options that perfectly matched both our budget and our musical needs, making sure we got the best value without compromising on quality. Thanks to his expertise, we walked out confident and satisfied with our purchase. Highly recommend this store to any musician looking for top-notch gear and excellent service
Sound quality ausom but not for base lover's
Top notch earphone Mike quality 🔥.gaming, music etc highly recommend ❤️🎧
I believe this is the best tws under 10000 rupees also it is an iem
Thank you audio store. The sound is amazing. It was delivered within time and product was perfect.
