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I recorded this sample yesterday with the KH80 placed at exactly the same distance so that the tweeters would align with the UBoom X, swapped the speakers and recorded the UBoom X with indoor mode again, I am sitting around 1.2m away. The recording sttarts with the KH80 and then switches to the UBoom X after 4 measures, switching every 8 measures after that.

Assuming that the KH80 would measure nearly flat in an anechoic chamber, this is to demonstrate how far from "neutral" the indoor mode really is, because I noticed complaints about indoor mode sounding flat", or others wishing even less bass, or more treble. You can notice that the KH80 appear boomier and more muddy, the UBoom X also appears slightly broader thanks to the stereo enhancing algorithm. Keep in mind that placing the KH80 farther apart would also open the sound and change the frequency response as the sound would be coming from a different angle.

I wanted to stay as close to neutral as possible, but didn't want the speaker to appear neither muddy nor boomy, therefore I tweaked the sound "to taste" and the stereo enhancing algorithm definitely helps to open the sound even more. For those desiring a flat more or less uncolored sound, the studio mode should be even closer to the KH80, but for me personally it doesn't sound that exciting. For indoor mode I could have boosted treble more or reduced bass or whatever, but my goal was to create a tuning which is rather at the neutral side while still being appealing to the listener and not anemic. As the sound will also start changing a lot depending on the listening angle, placement etc, which gives you way more freedom with a portable speaker than a studio monitor, the slight treble boost and reduced bass definitely helps here IMO.

Comments

Goetz S

thx so much for your great work!

J Hill

Yes thank you. How much acoustic treatment do you have in your room that you’re recording this in?

Bester Tester

Moin. Meiner ist dann auch da. Also bitte, du musst dich doch nicht vor irgendwelchen Idioten rechtfertigen, die deine Arbeit nicht verstehen! Lass einfach jeden, dumm sterben der den Sinn dahinter einfach nicht verstanden hat! Im Prinzip hätten Studio und Outdoor gereicht. Studio finde ich mega, der erste Speaker, der mir auf Maximallautstärke NICHT auf den Sack geht. Absolut gut gemacht! Trotzdem gibt es die geilen Zwischenschritte. Ich dachte z. B. „Wozu? xxX “ bis ich mir mal Joji Hirota, Hiten Ryu Daiko -> Fujin II angehört habe. Japanische große Trommeln, schön den Speaker in die Ecke oder an den Sweet Spot gestellt … macht einfach nur Spaß! Und genauso ist es mit den unterschiedlichen Genres. Die Leute sollen sich doch bitte erst einmal mit dem Zeug beschäftigen und dann ihren Senf dazugeben. Es gibt nur einen großen Kritikpunkt. Wie kann man an einem schwarzen Lautsprecher schwarze Tasten ohne Licht anbringen??? Hallo Earfun??? 🤯 Aber das hat ja nichts mit dem Sound zu tun. Also ein echtes Monster unter den „Low-Budget“-Speakern. Bitte nicht mehr rechtfertigen, die Arbeit ist gut und fertig. 99 % der „Profis“ hätten hier auch nicht mehr herausgeholt! Einer der wenigen Speaker, die wohl im Bestand bleiben werden. Schönes Wochenende 🫶👍

pokketa

Hi Oluv, when I use my Uboom X indoor I always prefer studio mode or the indoor mode, few days ago I tried to use my Uboom X in studio mode as my reference and then EQ my HD600, I just simply follow the frequency response but the result is shocked, my HD600 becomes very realistic, I guess after all HRTF is different but it really shows how can Uboom X be a studio monitor, the pink noise out of it is the smoothest I have heard from bluetooth speaker/headphones. Here is some frequency response I measure with my DIY microphone, it is far from perfect but already the best headphone I have. https://imgur.com/a/A0HieGx The Earfun Free Pro 2 is another story, I couldn't stuck the microphone deep into my ear canal, it stuck half way, and the audio cable make it harder for me too completely seal the canal with my earphone, which again making the frequency response unreliable, I tried to EQ it with just my ears but it seems like my ears is too stupid to accomplish it.

LeJJ

After a few weeks of listening I am blown away by the tuning. Depending on speaker placement, I have found locations where all of the settings have sounded great. One issue I’ve found is a rattling/artifact from the left passive radiatior (if I’m facing the speaker). It’s at low frequencies (somewhere around 40 hz) and can even be heard at lower volumes. I only hear it on a few electronic songs with deep bass solos and of course with bass frequency sweeps. My first unit does it a little, the second unit does it a lot. This seems to me more of a “rattle” vs overdriven distortion. It happens on all eq modes (yours and theirs). Have you heard of other units doing this? Could a new firmware filter out these very low frequencies? I think it’s a blemish on an otherwise near perfect speaker.

John

Just placed my order with the coupon code. If I am looking for a powerful sounding travel speaker, which has more potential with eq, the motion 300 or uboom L? Would you consider selling eq's for the uboom L to mimic the uboom X like the indoor+ setting? I understand it would have limits in loudness after, im not sure how many people listen to speakers at maximum volume, I usually stay between 30-60% volume.

Sturmflut

i personally would go for the motion 300 with uboom l eq. i own both and i prefer the motion 300 for travel / outdoor.

LeJJ

Earfun took care of it. They asked questions and requested a video of the speaker rattling. They eventually issued a refund. I was impressed by their customer service.

Boris Strahinov

I love this speaker! I can say a lot for it, but a lot of people already have and I don't want to repeat. I'm just here to give you guys a good laugh with a specific part of TechRadar's review of it: "Overall, the Earfun UBoom X is a speaker worth your while, but only if you’re a certain type of listener. If you’re someone that wants a more balanced, intricately detailed and crisp sound, you may prefer a Bluetooth speaker like the JBL Xtreme 4, which also launched in 2024."

Boris Strahinov

Hi, I think i'm experiencing your issue, could you please explain in more detail how was the process with contacting/explaining to earfun customer support? You can DM me if you want.

LeJJ

I replied to my order confirmation email describing the issue. They asked some questions and requested a video playing a song and a frequency sweep file. They asked a few more questions then eventually gave me a refund. I have 2 units but only one of them made the rattle noise, even at low volume.

Marioragcurtain

I have the uboom x for a couple days and im really happy with the tuning. Studio sounds very neutral while indoor gives it just a touch of livelyness. I didnt try it outdoors yet. To make it even better i connect it to my qudelix 5k so i can use aptx and ldac codecs. I udated to firmware 0.41 btw.