Panasonic RP-HJE120 ErgoFit – Review

Panasonic RP-HJE120 ErgoFit

Panasonic RP-HJE120 ErgoFit

| 9 mm Driver | Neodymium Magnet |

? The Panasonic RP-HJE120 Ergofit are the most famous earphones on Amazon with an almost perfect 5 stars rating and over 40,000 feedback scores; adding the fact that they are pretty cheap we thought they deserved a space in our database of earphones reviews. With a slightly larger than average dynamic driver (9 mm), a neodymium magnet and a declared maximum power capacity of 200mW, Panasonic may have manufactured an interesting earphone, but let’s don’t rush and see the results at the end of the tests.

… the most famous earphones on Amazon with an almost perfect 5 stars rating and over 40,000 feedback scores.

The housings of the Panasonic RP-HJE120 Ergofit are made of plastic which result in a very lightweight pair of earphones. Part of the lightweight has to be attributed to the thin cable, but besides the fact that they do not add much weight to the total package, using such a thin cable sacrifices durability and the quality of the rubber used on the cable does not provide them a good tangle-free performance. Do not think that this cable issues only happens with cheap earphones, the premium Sony MDR-EX7500/800ST are notorious for having a pretty bad cable (that resembles in many ways the one from the Panasonic RP-HJE120 Ergofit) and they were the 2nd top of the line earphone that you could buy from Sony some years ago.

The Panasonic RP-HJE120 Ergofit can be purchased in a very diverse combination of fun colors: green, red, violet, pink, orange, blue (like the unit we are reviewing) or the usual classic white or black.

FIND ALL: Earphones Scores Compared

MORE: Panasonic Earphones Reviews

Panasonic RP-HJE120 ErgoFit - Review

Tests & Scores



MORE: In-Ear Headphones Weight Comparison

SEE ALSO: Earphones Size Comparison


Accessories & Packaging

The RP-HJE120 Ergofit come in a plastic blister with a pair of extra eartips, plain and simple.



Bass & Sub Bass

The Panasonic RP-HJE120 Ergofit have some mid-bass punch but not much sub-bass, they mostly lack bass depth. For none bass-intensive music they might suffice or could be a good option for people that prefer more conservative bass that does not take over the whole sound signature. On the other hand, if you are planning to listen EDM or even pop music that you enjoy to have strong bass you could feel disappointed. With an EQ the RP-HJE120 Ergofit distinctly increase their mid-bass punch but sub-bass still does not shine.

… could be a good option for people that prefer more conservative bass…

The Panasonic went through our extreme bass test handling 40% of a Fiio’s E12 maximum power when setting the amplifier to high gain and turning bass boost on (also a custom basshead EQ was applied). The results were a remarkable increment of mid-bass punch strength and sub-bass depth but not that intense as to enter basshead territory, they do not offer any type of basshead rumble or impact. As to be more specific, they are more inline with what a good microdriver is capable of producing (for example: the UiiSii Hi-705 and even less than the Remax RM-565i), far less than its bigger brothers the Panasonic ErgoFit RP-TCM125 and the Panasonic ErgoFit Plus RP-HJE190 or other highly popular earphones as the JVC Gumy Plus HA-FX5, the Inpher FUQING B-2 or the KZ ATE. To be honest, we were expecting a bass response full of impact, punch and depth coming from them considering it holds a neodymium magnet, a slight larger than average dynamic driver and the maximum power capacity of 200mW reported by Panasonic.


MORE: Earphones Amplification Power Comparison

MORE: Best Basshead Earphones

SEE ALSO: Best Fun Sounding Earphones Chart


Mids & Vocals

Mids are laid back and lack energy. The recession is more pronounced on lower and middle mids but higher mids are neither exempt of recession. The higher mids recession grants the Panasonic RP-HJE120 Ergofit mids that are never harsh and pretty non fatiguing. An EQ slightly help to improve mids and vocals performance but they start to sound a bit boxy.



Highs & Treble

Highs on Panasonic RP-HJE120 Ergofit are smooth with very slight detail and never piercing or sibilant. They are not bright but very very smooth that can be a great thing for treble sensitive listeners. With an EQ, highs clear up substantially and brings noticeable brightness to the game while remaining free of sibilant or piercing highs.



Panasonic RP-HJE120 ErgoFit
Panasonic RP-HJE120 ErgoFit

Sound Leak

The sound that leaks out the Ergofit is just a bit below most average earphones, they are not terrible but it is neither their strongest asset. A clearly perceivable sound level will be heard by nearby people which doesn’t make them the best companion for libraries.



Sound Isolation

The Panasonic RP-HJE120 Ergofit do a pretty good job blocking outside noises. Sound surrounding you will get noticeably reduced without needing to raise the volume to very high levels.




The small size, lightweight plastic housing, featherweight cable and oval eartips combined result in a greatly comfortable earphone that will hold their place and offer pain-free long lasting listening sessions. The flat cone shaped housings ensure a very easy handling of the earpieces to put in and out or reposition at any given moment with little to no effort at all.



Response to Equalization

The response to custom equalization of the Panasonic RP-HJE120 Ergofit is very good generally speaking except for mids and vocals. Highs achieve a much better performance after being custom equalized and no piercing or sibilant highs are introduced. Bass gains much more mid-bass without making the sound signature too muddy. As we said before, mids and vocals do not excel with their response to any custom EQ, not much improvement is made and boxy sounding mids appear.


MORE: Editor’s Picks Earphones Chart

MORE: Best Bang for the Buck Earphones


Scores Scores

FIND ALL OUR: Earphones Reviews / In-Ear Headphones Reviews

MORE: Best Earphones Charts

Buy it at:

Frequency Response (raw)

Panasonic RP-HJE120 ErgoFit Frequency Response

Panasonic RP-HJE120 Ergofit - Frequency Response
Panasonic RP-HJE120 Ergofit – Frequency Response

Panasonic RP-HJE120 ErgoFit


Driver Unit9mm
Power Capacity200mW
Impedance16 ohms
Frequency Response20-20,000Hz
CordY-type, round cord
Cord Length1.1m
PlugL shaped stereo mini plug
WeightApprox. 44g
Supplied Accessories2x Earphone tips

We highly discourage anyone from trying to apply our testings to your own earphones, the risk of damaging or permanently breaking your iems is absolutely probable to happen. With our standardized equalization and amplification tests we push the limits of the earphones to the extreme. If anyway you decide to do so, we cannot be held responsible of the damage done to your equipment. Do it at your own risk.

Panasonic RP-HJE120 ErgoFit