PENON QUATTRO IEMs Review: Warm Sound Experience


Welcome to our detailed review of the PENON QUATTRO in-ear monitors, boasting a unique four-driver configuration designed to deliver unparalleled audio performance. With two 10mm dynamic drivers for low frequencies, an 8mm driver for the midrange, and a 6mm driver for high frequencies, these IEMs offer an expansive frequency range of 5Hz to 30kHz.

We extend our heartfelt gratitude to Audio Geek for graciously providing us with the opportunity to test and share our unbiased opinions on the PENON QUATTRO.

PENON QUATTRO IEMs Review: Warm Sound Experience

Design and Build Quality

Crafted with precision, the PENON QUATTRO shells are meticulously handmade using medical-grade resin material, combining durability with an elegant aesthetic. The faceplate, adorned with striking black and blue elements, complements the inner shell's sleek black design. Additionally, the color-matched cable not only enhances visual appeal but also ensures durability and longevity.

PENON QUATTRO IEMs Review: Warm Sound Experience

Comfort and Fit

Featuring a medium-sized shell with a deep nozzle design, the PENON QUATTRO provides a comfortable and secure fit, allowing for superior noise isolation. Pairing these IEMs with SpinFit W1 eartips further enhances comfort, ensuring an immersive listening experience.

Sound Quality


The PENON QUATTRO delivers a rich and textured bass experience, thanks to its innovative use of dual 10mm dynamic drivers. This unique driver configuration, reminiscent of impact tech or isobaric design, enhances bass impact and texture without overpowering the midrange or treble frequencies. Tracks like "Access Denied" by Synthwave Goose demonstrate the effortless impact of the bass, contributing to a warm and immersive sound signature.


With its natural and warm midrange reproduction, the PENON QUATTRO excels in capturing the nuances of both male and female vocals. Tracks like "Mann Mohanaa" by A.R Rahman & Bela Shende come to life, with exceptional clarity and detail in background echoes, breath sounds, and vocal pauses. The upper midrange is finely tuned, striking a perfect balance between richness and control, ensuring fatigue-free listening sessions.


Tuned for musicality, the treble response of the PENON QUATTRO is characterized by its clarity and precision. Tracks like "Chalak Chalak" from the movie Devdas showcase the lifelike texture and vibrancy of instruments, such as metallic tones and percussions. While maintaining a safe tuning, the treble exhibits just the right amount of sparkle and brightness, enhancing the overall musicality of the sound signature.

Soundstage & Imaging

Despite its intimate soundstage, the PENON QUATTRO excels in imaging, allowing for precise localization of instruments and vocals within the audio space. While not expansive, the imaging capabilities ensure an engaging and immersive listening experience.

Value and Competition

Priced at $399, the PENON QUATTRO competes closely with the ThieAudio Hype 2, available at $299. Let's delve deeper into how these two models stack up against each other and which one might suit your preferences better.

PENON QUATTRO IEMs Review: Warm Sound Experience

PENON QUATTRO VS ThieAudio Hype 2:

During our A/B listening sessions, we observed distinct differences between the PENON QUATTRO and the ThieAudio Hype 2. While the Hype 2 offers more sub-bass rumble, it falls short in the mid-bass department compared to the QUATTRO. Vocals on the PENON QUATTRO exhibit a thicker and warmer quality, enhancing the overall listening experience. In contrast, the treble on the Hype 2 tends to be crisper than that of the PENON QUATTRO, likely due to differences in the driver configuration employed for the midrange and highs.

If you prefer a warm, smooth sound signature with a focus on mid-bass, the PENON QUATTRO is the ideal choice. On the other hand, if you seek a sub-bass-focused tuning with crisp treble and a less warm midrange, the ThieAudio Hype 2 may be more suitable. Both brands have endeavored to cater to different sound signature preferences, ensuring that there's an option available to meet your specific audio needs.

Pros and Cons

Pros Cons
Warm and smooth midrange reproduction Treble lacks spaciousness compared to some competitors
Impactful and textured bass response Stock cable may lack sub-bass rumble for some listeners
Musical and controlled treble presentation Average layering in complex musical arrangements
Excellent build quality and durable cable
Comfortable fit with superior noise isolation
 Exceptional clarity and detail across the frequency spectrum


PENON QUATTRO IEMs Review: Warm Sound Experience


Despite initial skepticism surrounding its unique driver configuration, the PENON QUATTRO delivers an exceptional audio experience characterized by its warm, lush sound signature. Whether you're a discerning audiophile or a casual listener, these in-ear monitors offer a perfect balance of performance and value. Enhance your listening experience further by considering the Effect Audio Ares S 8 wire cable.

Feel free to reach out with any questions about the PENON QUATTRO in the comments section. If you're new to The Audio Store, don't hesitate to connect with us on WhatsApp and subscribe to our channel for more reviews and updates. We extend our sincere gratitude to Audio Geek for providing us with the PENON QUATTRO IEMs for review.

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