FIVE STARS
Beautiful Nostalgia
Pros:
1, Authoritative Bass
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Natural timbre
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Smooth across the whole signature
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Holographic staging
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cohesive sound signature 5. Build quality 6. High quality cable
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Beautiful faceplates 9. Good accessories with nice case
Cons:
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Needs 200 hours burn in
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Not for neutral fans
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Might not be for you if want a uncoloured and ācorrectā sounding iem 4. Niche tuning
The Penon Quattroās are a unique sounding iem with a warm luxurious signature I would describe them like a hug from a favourite friend, warm, welcoming full of emotion, too many iems released at the moment are almost carbon copies of each other chasing the Harmon target with only the shells being different. Iām tired of Harmon I want different.
Penon donāt follow trends they make them. All Penon iems have fantastic mids,the differences between models is how the bass and treble are presented. The Quattro with its 4Dynamic Drivers is, and have now doubt about this, a niche tuning, thatās not going to work with all genres, but when it does, boy! Its superb!
The Title of this review is āBeautiful Nostalgiaā why you may ask well when I heard how this iem presented my 70s and 80s Classic Rock catalogue I was transported back to my days in heavy rock night clubs where the DJās had PA systems that they shared with the bands that performed live. I used to hit the dance floor with my air guitar and rock out, the bass bins literally blowing my hair back, an exhilarating experience. When I got home and played the same tunes on my hifi system I was always disappointed with the sound, where was the excitement, the note weight, the visceral thump of the drums! The Quattro is the sound of those clubs, big, thick, warm imbuing the dry productions of those decades with organic, emotion filled authority.
The Quattro is built to the usual high standard Penon is famous for coming in a small box packed with all the accessories needed no frills but not lacking in any area. The included cable not only colour matches the shells to perfection it synergizes really well with the iem. The inc zipped case is the perfect size to hold the iems, cable and selection of tips you could even fit a small portable dac in there.
Iād just like to say upfront I believe we are all biased when giving our subjective thoughts about IEMs be it a particular type of signature that works with our music library or how an IEM looks and feels in our ears. On the subject of ears everyoneās ear anatomy is different and this effects fit and seal which in turn effects the perception of bass response so I recommend finding the right ear tips that suit your ears to get the best of any IEM.
My review star ratings are linked to the price range of the iem eg a 5 star review of a $100 iem is not equal to one of a $500 iem.
Iām and audio enthusiast with a collection of over 200 iems, 30 different sources with a music collection that numbers over 100,000 tracks and 15 flathead buds I share my impressions as a way to share my enthusiasm for the hobby I approach from the premise of music first technology 2nd, what does this mean? For me the technicalities are not of prime importance but does the music move with this particular iem.
Iām a connoisseur of many different sound signatures. The only prerequisite is musicality Iām not a fan of analytical cold playback. My scale of success when it comes to evaluating iems is; do I get goosebumps when they playback my favourite tunes. There are many good iems but do they give me goosebumps? Unfortunately I have a draw full of just good iems.
I want the iem that I reach for without thinking because I instinctively know it will bring the thrill Iām seeking from my music. The Quattrosās bass, mids and sprinkling of treble coming from the Dynamic Drivers gave me goosebumps with my most loved genre of classic rock which I believe to be the last bastion of instrumental authenticity just bands playing together in the studio with a sound engineer capturing the magic on tape! The Quattroās analogue signature matchws perfectly with these types of recordings.
I Have always favoured Dynamic Drivers for the tactility and organic natural playback they produce. The Quattroās four Dynamic Drivers give good sub bass and great mid bass combining to give a really exciting bottom end that drives the music along. The mid bass does bleed in to the silky smooth mids, giving male vocals a gorgeous deep resonant presentation the mids while warm are relatively neutral, the warmth from the midbass reaches throughout the full range. This might been seen as a bad thing but for me itās a refreshing change from the norm allowing the thickness to enhance the types of muisic that often sounds thin and wanting. There is detail, and layering the timbre is just wonderfully natural with both male and female voices having added note weight. The treble is not prominent but it is there the leading edge of cymbals are crisp and sound very natural. The upper range of the mids and lower treble do sound very effective especially when cutting through the heavy bass on songs with singers in the higher registers. The whole sound being rendered with extra warmth that reminds me of kicking back in front of a warm fire and floating away listening to my favourite tunes.
Now I know there are those who donāt believe in burn in of iems, all Iām going to say is, Penon requested I burn in the Quattroās for 200 hours which I did. Penon also included the Penon Tail portable DAC/AMP in my sample as the Quattros need power to shine. Disclaimer Penon was kind enough me a sample of the Quattro and Penon tail dac/amp.
I am not affiliated with Penon and of course was not asked for any copy checking before publishing, they are seeing this the same time as you. All pictures taken be me. ALL opinions shared in this review are my subjective thoughts.
Make sure to research any iem before you buy! The Penon Quattro retails at $399 which for this configuration is extremely competitive and are available for purchase from the Penon website see the non affiliated link below
PENON QUATTRO (penonaudio.com)
Details from the Penon website
Penon QUATTRO 4 Dynamic Driver 2Pin 0.78mm HiFi Earphone Audiophile IEM
Needs to burn-in 200hrs.
Description
Handmade, the earphone shell is solid and more durable.
Using medical grade resin material, light and beautiful, comfortable to wear.
The QUATTRO uses an independent 3-way crossover and 3-independent conduit design for better layering performance.
The low frequency uses the latest horizontally opposed dual low frequency driver to further enhance the bass effect.
Middle frequency uses new generation of graphene materials, more rich details and listening.
The high-frequency uses new process makes the sound smoother and more delicate.
Specification
Model: QUATTRO
Driverļ¼4 Dynamic driver
1 x 6mm custom dynamic driver for High frequency
1 x 8mm graphene diaphragm for Medium frequency
2 x 10mm composite diaphragm for Low frequency
Impedance: 16 Ohm
Sensitivity: 100dB
Frequency response: 5Hz-30kHz
Connector: 2pin 0.78mm
Cable lengthen: 1.2M
Package
Penon QUATTRO
9 pairs of silicone eartips (SML)
Earphone case
Pouch
Brush
Clip
Warranty
18 months warranty
The frequency graph for those who like to see such things
What do they sound like?
I have talked about what the Quattrosās sound like with my Classic rock library now Iām going to mention what the donāt really work with. For starters they really need power to perform at their best and also a relatively neutral source. They really donāt need any extra warmth! Some modern bass heavy tracks with with fast passages expose the speed of the drivers which have a longer than usual note decay this is not ideal for speed metal or hard dance tracks. I stated at the beginning of this review that they are a niche signature yet I give them a 5 star review, this is because what they do well they do really well. I choose which iem Iām going to use relative to the music I want to listen to. I mean it is fine having an all rounder that plays everything alright without any particular track standing out but I want to be have the wow! Experience when listening to my favourite tunes and I have very eclectic tastes so I have favourite iems for different genres. I use different iems when I want to listen to a playlist on shuffle.
I want to really enjoy my music. Something that releases the full scope of what the artist created in the studio. The Penon c does that with that special something with my classic rock and Americana library. The cohesion of the drivers ensuring to thereās no jarring transitions between the frequency range. The Quattro is a warm, lush, bass driven signature, bass is textured, dynamic and layered. The mids are slightly warm and colour the vocals there is extra body to males vocals and female alike the padding from the bass adding note weight but there is no effect on the natural timbre of the vocals . The vocals take half a step back, they are there front and centre with instruments placed exactly where they should be showing depth to the stage with natural unforced width. The Quattroās 4 dynamic drivers sound very coherent no trace of uneven timbre just everything working together as one.
What do I mean by unforced width? Some IEMs give an impression of super wide stage which sounds unnatural throwing instrument placement off. With the Quattro the staging is reliant on the production of the music, if a song is intimate thatās how it is rendered if the song has wide deep and tall production values the Quattro is not the best at reproducing width and depth due to the prominent bass the staging is there its just slightly more intimate than other iems with airy signatures. .
The mids are natural and organic thick, warm with just enough edge to add excitement to vocals and guitars causing me to be drawn into the music, Pianos and Guitars are given a really even treatment with extra note weight sounding exactly as you would expect if you were in a concert hall. The Transition from upper mids to lower treble is boosted slightly but still sibilance free, even with songs that have sibilance bult into the recording. They are almost a dark iem but the little bump in this region just edges them into excitement in this area. To be totally honest the Quattro is very tip reliant I found with wide bore tips there was a much more pleasing treble and a more open sound in general with narrow bore tips the whole signature became too warm and an element of congestion was apparent. I settled on Divinis Velvet wide bore tips these gave me the perfect balance of warmth and treble extension I tried the tri Clarion tips but they took away too much of the warmth that makes the Quattro sound so special, On the subject of tips while Penon give a generous selection of tips I couldnāt get a good seal with any of them, I have very big ear canals.
The timbre and tactility of drums, strings, guitars and brass instruments is very natural all instruments find their own place. Vocals both male and female are reproduced authentically with emotion, every inflection, intonation is apparent as a singer climbs the scale to the crescendo it is presented well cutting through the thick bass, if a voice has gravel you feel it. The Quattro is quite forgiving of poorly produced music. The sound signature as a whole is of big bass with warm clear clean mids with a little edge in the treble, an overall satisfying feeling of immersion in the music When Iām evaluating IEMs I have a play list of roughly 100 songs of mixed genres. With the QuattorI again, I found myself listening to songs rather than analysing the different frequency ranges listening to albums in their entirety just loosing myself in the music. I found they worked across some genrres better than others always smooth and velvety . I donāt listen to much EDM but the Quattro played the Daft Punkās āGet Luckyā quite well but its real strength was with real instruments playing together as a unit.
Zodiac-Rebirth of fire ā Grain of soul album sounded Immense with thunderous bass. The guitars grinding with a dense foreboding drone the drums huge with dynamic attack. The Ozzy Osbourne inspired vocals screaming cutting through the doom metal backing, ducking and diving through the mix bringing more depth to the vocals along with the searing guitar. This track nails you to the wall and the Quattro really brings that authentic Marshall stack power a very exciting experience. Lorde - Royals with its throbbing and droning subbass really digging deep into the depths with great effect, her higher range voice sibilance free this track really had good depth with her vocals more rounded and smoothwith the drone of the backing being visceral and prominent
Lloyd Cole and the Commotions ā Perfect Skin, this 80s indi pop classic with jangly guitar sounding detailed with the strings resonance reproduced well. Lioyds vocals can sound a bit edgy on lesser iems, not here the note weight and roundness to his lower register was very pleasing. At no point with the Quattro did I experience any form of veiling in the mids and treble the production style of this song is very spacious as if in a large empty room the extra warmth added to this really helped to add authority to the vocals the bass while big, dynamic and powerful just doesnāt encroach on this track. Steely Danās - Aja, one of the best produced albums in my opinion was played with a musical, smooth warmth that really suited the song , hi-hats and cymbals were natural with excellent decay staging was good with height, depth and width enabling me to pick out instruments in the mix, with a little added warmth this song still felt open with the layering of the instruments in a class above its price bracket very enjoyable.
Rolling Stones- Beast of Burden this is one of my favourites with its swinging bass line Charlie watts deft drumming starting the song, then Jaggers high vocals dancing around the backing thereās good air and space around the individual instruments a very holographic play back with extra note weight really enhancing the song
Led Zepplin ā Since Iāve been loving you
The lead guitar intro is perfectly presented sweet and keening the drums with that slow heavy rhythm, then as the song builds, keyboards the cherry on the cake comes with Plants unmistakeable vocals reaching for the sky as the song builds in intensity to a cohesive whole with the wailing Plant cutting through like a hot knife in butter. The Quattro excels with possibly one of the best playbacks Iāve experienced in the hobby with Zepplin so much power with the vocals never overpowered it is just a triumph giving that feeling of being in the front row of the best concert ever.
Fugees-Killing me softly
Lauryn Hills pure vocals start the song with the electronic backing music and interjections from Wyclef Jean the subtleties of the interplay between vocals and instruments are played well, Laurynās voice warm and intoxicating. The spatial ques are very well executed with voices and beats interplaying the Quattro loves this type of production which can sound a bit dry on other lesser iems here it sounds rich and smooth.
Iron Maiden -Rhyme of the ancient Mariner ā
The dynamics of this track are reproduced with accuracy the driving rhythms are dynamic and punchy , I did however feel there was a little congestion in the guitars, bass and drums they were reproduced well enough just a little crowded. Bruceās vocals were on point and unveiled just good headbanging fun. The Quattro is a little exposed with faster tracks with instruments in the same frequency range and can get a little congested due to the slower decay rate of the low end. The Quattro is not easy to drive for an iem with 4 DDs I had no issues using them with Daps, Dongles in getting loud enough but the dynamics and more open sound with the texture and layering they are capable of wasnāt available unless they were driven by a more powerful source.
They sounded good with more neutral sources. This is an iem that needs a powerful source to scale impressively. Iām not a fan of analytical sounding IEMs that force details into your ears like a photograph with HDR and sharpening set at max a decidedly digital representation. Iām more Vinyl on a turntable, Leica manual focus, sumptuous colours on kodak colour gold film, kinda guy, where if you look really close all the details are there but itās the whole image you appreciate rather than just how sharp it is.
Sources used:
IBasso dx170 Shanling H5 HiBy R6 111 HiBy R8
Penon tail dac /amp
Cayin N3 Ultra
Venture Electronics VE RunAbout RA 2B-FE 2BFE FIIO M15
When using my different sources I definitely favoured the more powerful ones the extra dynamics and layering were so different from the play back with less powerā
Penon TAIL HiFi Portable Type-C to 3.5mm/4.4mm Headphone Amplifier with Gain Button
Description
Penon TAIL is a HiFi digital audio decoding PCBA solution USB dongle.
Built-in USB audio bridge chip and dual-channel low-power high-performance Dual CS43131 DAC decoding chip.
Up to support PCM 384 kHz/32Bit and DSD256 digital audio codec. Select ultra-low noise power supply and high precision femtosecond crystal oscillator to further improve the performance parameters and sound quality.
Integrated 4.4 mm all balanced differential output and 3.5 mm stereo output, load support 16Ī© ~ 600Ī©, the output two gain switch control, can be perfect fit all kinds of earphones.
Volume button and play/pause in-one button and three independent (VolĀ±, Play/Pause) button compatible design, easy to listen to music control; With PCM and DSD light effect.
Excellent compatibility of mobile phones, it has been verified to support PC, Android, iOS device.(Does not support mic cable)
Specification
Model: TAIL
Chip: dual CS43131
DAC: DSD64, DSD128, DSD256
Decoding rate: PCM 384KHZ/32bit and below
USB port: TYPE-C
USB protocol: UAC2.0 protocol, UAC1.0 protocol
Support Impedance: 16-600Ī©
Output: 3.5mm audio + 4.4mm balanced
Frequency response: 20Hz-20kHz
SNR: [email protected]/ 4Vrms,[email protected]/ 2Vrms
THD+N: [email protected] /4Vrms,[email protected]/ 2Vrms
Crosstalk suppression: -135dB@4. 4mm/ 4Vrms, [email protected]/ 2Vrms
High precision femtosecond crystal oscillator: 100fs
Output performance
3.5mm output(low gain) 32Ī© @1kHz, connect with PC
Impedance: 32Ī© @1kHz
Output level: minimum: 900mV, 25.3mW; typical: 1000mV, 31.25mW; maximum: 1200mV, 45mW
Frequency response: 20-20kHz
THD+N: minimum -105dB, typical -100dB, maximum -95dB
SNR: minimum 110dB, typical 120dB, maximum 130dB
DNR: minimum 110dB, typical 120dB, maximum 130dB
Crosstalk: minimum -65dB, typical -60dB, maximum -55dB
3.5mm output(high gain) 600Ī© @1kHz, connect with PC
Impedance: 600Ī© @1kHz
Output level: minimum: 1800mV, 5.4mW; typical: 2000mV, 6.67mW; maximum: 2200mV, 8.07mW
Frequency response: 20-20kHz
THD+N: minimum -105dB, typical -100dB, maximum -95dB
SNR: minimum 115dB, typical 125dB, maximum 135dB
DNR: minimum 115dB, typical 125dB, maximum 135dB
Crosstalk: minimum -95dB, typical -85dB, maximum -75dB
4.4mm balanced output(low gain) 32Ī© @1kHz, connect with PC
Impedance: 32Ī© @1kHz
Output level: minimum: 1800mV, 101.25mW; typical: 2000mV, 125mW; maximum: 2200mV, 151.25mW
Frequency response: 20-20kHz
THD+N: minimum -105dB, typical -103dB, maximum -100dB
SNR: minimum 120dB, typical 125dB, maximum 130dB
DNR: minimum 120dB, typical 125dB, maximum 130dB
Crosstalk: minimum -110dB, typical -105dB, maximum -100dB
4.4mm balanced output(high gain) 600Ī© @1kHz, connect with PC
Impedance: 600Ī© @1kHz
Output level: minimum: 3800mV, 24.07mW; typical: 4000mV, 26.67mW; maximum: 4200mV, 29.4mW
Frequency response: 20-20kHz
THD+N: minimum -105dB, typical -103dB, maximum -100dB
SNR: minimum 125dB, typical 130dB, maximum 135dB
DNR: minimum 125dB, typical 130dB, maximum 135dB
Crosstalk: minimum -140dB, typical -135dB, maximum -130dB
Package
Penon TAIL
At only $75 the Penon tail is a powerful budget option if you havenāt got aces to powerful source available on the Penon website follow unaffiliated link below
Penon TAIL (penonaudio.com)
The Penon tail on high gain offers enough to drive the Quattros for decent playback and the perfect form factor a portable dac/amp.
I used it with my Samsung Galaxy 24Ultra to power the Quattroās. I will say that there is a quirk with the 24Ultra where it insists on setting the dongle to full volume on insertion so watch out for that. The Quattroās sound good through the Penon Tail giving reasonable dynamics and opening up the layering. Definitely good enough for music on the go.
Hiby R8, R6 111 and FiiO M15 - with the Penon tail giving good playback these daps all gave great playback with punchy more snappy dynamics a level above the the small dac the extra power on tap really open the Quattro up.
Venture Electronics VE RunAbout RA 2B-FE 2BFE Amplifier Dac & amp
The real excitement came when I plugged into the VE stack with its 3000mW RMS per channel. The Quattroās really started to sing the abundance of power really opened up the sound the dynamics were stellar with holographic staging and more extension in the treble.
Comparison
For comparison it was obvious that the best choice would be the Penon Serial the 3 dynamic driver that preceded the Quattro. The Serial is a superb iem with a very nice balanced signature that really plays well across all genres. The Quattro. When looking at the graphs below you can see the Serial has less midbass this impacts itās signature leading to less bass bleed leaving the mids less coloured than the quattro with less note weight. This is both positive and negative depending on the type of music you are listening to. The Quattro has more bass, warmer mids and more definition in the treble.
The Quattro is an excellent companion to the Serial if I was to compare my iem collection to a tool box the Quattro is a specialised tool that does specific jobs better.
Conclusion
The up to $400 range is full of great sounding iems with more released it seems on a weekly basis the Quattro more than competes itās an exceptional iem in its niche with very little competition and sets a new standard. Itās fun and exciting vintage sound signature when paired with the right music. The Quattro may not be the most technically adept iem I have experience in this price bracket but it is one of the most musical I would say you have to spend a lot more money to get better at this kind of unique signature. After all the CA Trifecta is over $3k .