JBL 305P MK II - A Look Inside
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- Опубліковано 7 лют 2025
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JBL 305P MK II - amzn.to/2I8PGVA
goo.gl/TZwgTC
LF DRIVER SIZE 203mm 5"
HF DRIVER SIZE 25mm 1"
HF DRIVER TYPE Soft dome
CROSSOVER 1725Hz 4th order acoustic Linkwitz-Riley
OK FOR USE NEAR MAGNETICALLY SENSITIVE Yes
INPUT SENSITIVITY
-10dBV INPUT 92dB / 1m
POWER CONFIGURATION Bi-amplified
HF DRIVER POWER AMP 41W, Class-D
LF DRIVER POWER AMP 41W, Class-D
FREQUENCY RESPONSE ±3dB 49Hz - 20kHz
FREQUENCY RANGE -10dB 43Hz - 24kHz
LOW FREQUENCY EXTENSION -10dB 43Hz
MAXIMUM CONTINUOUS SPL 94dB
MAXIMUM PEAK SPL 108dB
MAXIMUM PEAK INPUT LEVEL
-10dBV / +4dBu +6dBV / +20.3dBu
SYSTEM DISTORTION CRITERIA 10% THD at maximum output with full compressor / limiter engagement
ELECTRICAL DISTORTION CRITERIA 0.2% THD @ 1kHz / 2.83VRMS output; 1% THD @ 1kHz, full rated output
SIGNAL TO NOISE RATIO 75dBA A-Weighte, 70dBr unweighted, relative to 2.83VRMS output
COVERAGE
HORIZONTAL x VERTICAL 120° x 90°
ANALOG INPUT TYPES 1 x XLR female, 1 x TRS female, balanced
HF TRIM CONTROL -2dB, 0dB, +2dB
BOUNDARY EQ LF Shelf @ 50Hz: -3dB, -1.5dB, 0dB
AC INPUT VOLTAGE 100 - 240VAC , 50 / 60Hz
ENCLOSURE TYPE Ported
ENCLOSURE CONSTRUCTION 15mm MDF
ENCLOSURE FINISH Matte black PVC
BAFFLE CONSTRUCTION Injection-molded structural ABS
CABINET DIMENSIONS
/H x W x D/ 298 x 185 x 231 mm /11.75" x 7.3" x 9.9"/
DISPLAY CARTON /H x W x D/ 354 x 244 x 299mm /13.9" x 9.6" x 11.8"/
SHIPPING CARTON /H x W x D/ 373 x 260 x 315mm /14.7" x 10.2" x 12.4"/
NET WEIGHT 4.73 kg
SHIPPING GROSS WEIGHT 5.72 kg
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Fantastic... I've been looking for a video like this for 2 yrs
Cool Video.....Thanks for your careful disassemble. I always open my own speakers. It helps gauge how much they can handle, As well as see how well they were constructed.
Видео - наглядное пособие тем, кто 1) считает, будто керамические смд конденсаторы плохие для усилков 2) что передняя панель из пластика это зло 2) что импульсный блок питания это плохо для звука...ну и так далее. Почему-то это именно мониторные колонки, и всё в них звучит адекватно.
К сожалению, «те» правы - мониторы прилично шумят. Заземлены, сигнал балансный. Так что дело сугубо в БП
LOVE your work. I just subscribed. I'm deciding between the JBL 305P and Mackie CR5-X. They cost the same, they sound the same with my eyes closed, but I love the look of the Mackies better. However, I have heard horror stories about the Mackie's construction, for example, that you can't repair them because the circuits are covered with glue. Do you know anything about them?
I'm enjoying watching the new product's hot decomposer
Excellent build quality and components for the price.
Thanks for the teardown, I'm looking forward to buying these!
if we have too many electronic parts, this means that this equipment is exposed to multiple failures in the future 80% of failures are caused by the explosion of transistors due to overheating.
JESUS CHRIST THERE'S A LOT OF STUFF IN THERE.. HOPE THEY SOUND GOOD, JUST ORDERED THEM. AS A MUSICIAN GUITAR GUY, ALWAYS IMPRESSED WITH JBL FROM THE 80'S ON.
Hello, i have the same speakers and one of them stopped turning on out of nowhere... any tips?
James Bullough Lansing was the genius who created what is now known as the brand JBL.
Oh, I always thought it was John Bradshaw Layfield !
I cant wait to get mine!!
用料是真的节省，箱子很轻，我买的是306P MKII，性价比确实不错，当然在中国国外更便宜！
Слышал их у друга. Приятно порадовали детальным чистым звуком. Совершенно не утомляют и имеют 3D что звучание с широкой стерео зоной. Очень «воздушные» открытый звук.
правда что в них фоновый шум в паузах слышен?
@@DenBogatyrev Не могу сказать. я не был в тихой комнате с ними. Это частая проблема с мониторами, их усилители включены на всю. Купил себе классические колонки и усилитель отдельно чтобы слушать очень тихо, иметь пульт и прочие фишки. Счастлив.
@@DenBogatyrev Да,картошечка жарится где-то на громкости 10-15% от общего уровня((( Завтра понесу мастеру менять китайские детали на "нормальные"...
@@elkipalki00 как решить проблему шума на паузе?
Sirven para películas y música?
Video perfeito !! Muito Obrigado !
whenever i see someone goop their parts i wonder if it's because they don't want to make the item repairable or to obfuscate parts...or maybe someone was jerking off on the assembly line. either way...is there a reason for this or is this just sloppy? it looks s tiny bit strategic to me...maybe functional? anyway, mine arrived yesterday...opening them tomorrow.
I used to own JBL previous version to me the sound is very thin, not warm. If you want a warm mix try Tannoy Reveal
Looking to upgrade my monitors speakers, I already have a pair of Tanoy Reveal 501a, do this one has a better quality audio and more powerful bass ? Sorry I a home consumer I do not know anything about this stuff are build.
WHERE CAN I GET SOME PIECE ? I NEED FIX MY JBL ..
+1
Can you please say the speaker impedence ? How many ohms the woofer is ?
A professional speaker that front is made of plastic instead of mdf or hdf.
because of the wave guide.
@@puresesh7985 wave guide is not needed for mid/bass speaker
@@nellight5397 false wave guides are needed and if there was only plastic for the tweeter it would look worse. Do you work at a speaker company no.
Front baffle should be made of mdf or hdf if not it should be metal just like what JL audio used in their E sub series. Thought those are subwoofer, I will still insist that baffles should be made of wood not just plastic as it should be stiff and should be able to handle the vibration that speakers produce. Additionally, one of the most important sides of the cabinet is the front as it holds the speaker. That's why speaker manufacturers tends to double the thickness of the front than side and back. Do you also work on a speaker company? Absoulutely not.
@@nellight5397 the plastic baffle on these speakers is fine they are not subwoofers. and they are not that powerful. i agree wood should be used in most cases and for subwoofers thick mdf should be used but these are studio monitors and to get the wave guide they used plastic also big pa speakers use plastic for there boxes. also the 3 series of monitors sound fantastic even sounding better than speakers double their price range.
could you please tell me in your Opinion Kali LP6 or JBL 305P?
Qoli kali
Can we convert it to passive speaker and use it for home theater
what type of fuse does it use?
Exactly what I needed, only other thing they could a done is pulled the foam out of the box to show how thick the actual wood is but whatever
is that MOSFET in its output stage , just like the Hypex uCD ?
It is Class-D ic amplifier.
odd that they put the board in the field of vibration.. although maybe I'm wrong about how the sound waves carry
You are correct they should have isolated the electronics from the speaker chambers.
@Eithan S It's probably not a big deal. I'd just recently learned that poorly soldered old pcb board can lose components with too much vibration. I actually don't even know if there is a field of vibration behind the speaker so I probably shouldn't have commented.
It seems likt this enclosure would be fairly simple to upgrade..
el frente no es de madera? una caida accidental y cambiarla
Por eso hay que ser cuidadoso con tus equipos, para que vas a gastar mas de 200$ en unos monitores que vas a dejar caer? es como que yo compre una guitarra de 2000$ y diga "Ay no es de hierro, una caida y a cambiarla"
Thanks ive always wanted to do this but i was too afraid to fuck something up
7:00 It seems the first gen had a bigger magnet.
Yamaha Hs7 Video ?
We’re can I get that same transducer
Nicely done my friend..! In terms of the result(sound) you think it is really improved? Is the mkii better?
Since audio equipment manufacturers went into using class d amplifiers is when a lot of audio quality problems started.
@@tyronenelson9124 would you please explain why?
What type of Amp did they use before?
Thanks
@@Talia.777 What do you mean by, type? thanks
@@Talia.777 They use class D (pulse width modulation) amplifiers now, which are small and way more power efficient but not as high fidelity. They used to use class A or AB, which have better fidelity but are huge but hot and suck a lot of power. Class D amplifiers also tend to have a quiet hiss, which is present in these JBL's. www.crutchfield.com/S-y3R5rWSwwEP/learn/which-amplifier-class-is-best.html
@@bendirval3612 Thanks
the amplifier circuit looks to be improved does anybody know if there is much difference in sound from the MK II to the earlier version?
❣️ JBL ❣️
Awesome speaker 😍
You can pretty much see the corners that were cut in their designs. I would: #1) Use modelling clay to fill in all the open spaces in the whole front baffle - I bet that baffle vibrates like a battery powered d*ldo. #2) Install a dowel across the opposing sides of the cabinet to stiffen it - as it is now, I'm pretty sure that it vibrates/resonates too. #3) Add in some Sonic Barrier acoustic foam to all internal cabinet walls - that would kill even more left over resonances after stiffening cabinets. #4) Add in more cabinet damping material like Acousta-Stuff or polyfill - that will reduce internal standing waves and dampen bass peaks to clear up the midrange and improve bass responses. These improvements/mods are pretty much universal for any budget speaker (and even some of the more expensive ones too). I did this with my Energy RC-10's and it improved them a great deal - they're now punching above their weight quite a bit.....
All wrong but ok😊
Lots of B.S in this comment. And if there were cut corners, it's a budget studio monitor yet still looking better than most monitors at that price range.
Greetings..., I accept the baffle thing, but messing with the cabinet NO! Because you would be affecting the QTC. It is supposed to be a critical listening monitor, not a "Hi-Fi". By adding reinforcements, and new damping material..., you automatically change the internal volume of the enclosure. Which in turn lowers the QTC from 0.707 ⬇️🚫⚠️ That would practically add or increase the distortion in the frequency spectrum further. The most ideal thing would be to build a new cabinet but with a more rigid material and respecting the manufacturer's internal volume to obtain an improved response. A QTC below 0.707 gives you a flatter response, it is true, but at the expense of sacrificing the punch of the kick and other instruments in that area, not to mention that the diaphragm of the "mid bass or woofer" driver will shake more because that driver is not made for that excursion linearity. That translates into a lot, but a lot of distortion. For this job, the subwoofers were created with larger suspensions to be able to faithfully reproduce this frequency range. But the modification of the baffle also occurred to me as it could improve the resonance near (17kHz-20kHz). Another thing: if you had only added the cabinet reinforcements without the new damping material, the QTC would have risen, then the problem would be another one, which is that you would have more punch, but less precision. If you want the best of the best you have to make the cabinet new and more rigid like aluminum, birch wood, rose wood, even bamboo you can make it with a higher density (1" or 25.4mm), run away with all your might from MDF is the worst material of all that's why it's the cheapest. Reuse your baffle to make sure you have your stereo field that waveguide is calculated to precision that's why they are so famous. One last last minute observation watching the video is that the tweeter does not have a dedicated compartment. You could make a small box (NOTE: this new box does not need internal volume so the smaller... the better). The resonance of the inner cabinet may be muddying or dirtying the linearity of the tweeter. Another thing you can do is modify the cables add thermoplastic insulation and shielding to reduce and hopefully even eliminate interference (RFI/EMI), by the electrical network of the house that also adds harmonic distortion "THD". Another update is to verify that all components are well secured. If any are loose, adjust or glue with hot glue. Upgrades: 1. Fill all cavities of the speaker with asphalt panels, compressed fiberglass, custom MDF blocks with glue, polyurethane, neoprene, dacron, etc... 2. Wrap the cables with thermoplastics. 3. New cabinet. 4. Check for loose components. 5. Create a compartment for the tweeter. 6. Bevel the cabinet for less diffraction and a better stereo field.
@@user-xowo3vxy92b73h The thing about the cabinet mods is to NOT take away more than ~5%-10% of the cabinet volume - hence, the small wooden dowels, the bitumen sheets, and the porous foams - which won't take away more than ~5%-10% of the box volume. Above that is when the bass and Q values will change for the worse - below that simply makes the bass tighter, and allows the mids and treble to be much clearer and cleaner, IMO. Other than that, I 1000% agree with you...
No, of course... For the readers who read me, my point is that you can buy speakers with that Hi-Fi color in that same price range, and you will save time, money, and energy. There are situations where no matter how much you want to squeeze out every last drop of performance, it will be impossible to achieve the best results with factory materials. So when you add the speakers + the modifications..., you are better off buying new speakers. Now there are situations where for fun or hobby we want to improve the unbeatable, I think both me and my friend are the same in that aspect. 😆🤜🤛😎 All audiophiles are sewn with the same needle.
I own it. the tweeter doesn't sound like jbl. they should use paper dome like the le-20-1 or titanium dome. I just can't get the jbl experience from my pair of 305. it's an excellent speaker by itself though
Hi! what number have the audio chip? and it have no heatsink, have you tried how hot it gets?
STA350BW
@@zariumsheridan3488 Thanks!!
AND RECALL THE MASSIVE AMPEG SVT BASS AMP WITH TEN 8" SPEAKERS, USED AROUND THE WORLD FOR LAST 30 YEARS, BY U2 STONES, EVERYONE. SO 8" SPEAKERS WORK FINE FOR BASS IF BAFFLED RIGHT.
WHATS THE NAME OF THE TRACK ?
Hello.... I just bought these, but the 6.5" version. Is it possible (and easy) to remove the glossy front part to paint it another color?
Watch the *WHOLE* video...
Sandblast it.
What types are the big ICs on the PCB? The bigger one will be some D-Class (TI?), what is small one, is it ADAU1701? Thx.
It would be some sort of dsp.
thank for this video . T like this video.!
must have been cold outside.
Hello! Where can I order a tweeter for jbl lsr 305 mk2? and is it different from the jbl lsr 305 tweeter? maybe they are the same?
I also need one
have you got any further there?
So very nice video
A minha dessa está vibrando o subwoofer e n sei onde encontrar
Sir ji ye speaker ka protection matlab jali nahi laga huaa hain speaker me
Wow awesome inside 😍
Sir I want to paint my 306 white
Which paint should I use for plastic front and and wood cabinet?
Please suggest something 👍😊
Safer to go with passives , unless money to burn on really high end non passives , but yeah who cares gear normally lasts quite a few years then just add an amp to cooked non passives
which version is better in your opinion?
the second generation has a little better sound ,
mkI as they sound the same the mkI looks better and has more adjustments for hi and low.
This is not a real active box because the crossover is passive. So it doesn’t make much sense, it’s a scam.
mkii is the cost down version
Nice teardown. What is cost in dollars?
No 5 cents bracing? No silicone gaskets? Cheap cabling.
Belinya dimana satu setu setnya berapa bos aku naksir banget
love the track////////////
me too, cool sound
Wow~~ 👍👍👍👍👍👍👍👍👍👍👍👍
thats a pretty big magnet on the woofer
Box looks well built except for that pos plastic baffle
JBL❤️🥰🔥
what about the auto stand by??? anyone with this problem??
please i need help... it's so anoying
ua-cam.com/video/A_05foHkQ2Y/v-deo.html
A comparación de los parlantes y twitter que usa yamaha estos parecen parlantes que venían en los antiguos televisores de tubo.
Super lovely
Cool video. Can you do a klipsch rp-280f?
Hi! I own a pair of the gen1 speakers. to me they sound as if the front heavily resonates. can i dampen it by applying silicone to the waveguide? the bass also is a bit pillowy, can this be fixed by stuffing the speaker with sonofil?
I put Auralex pads underneath mine. Needs sub for bass.
FOR INSTANCE MY $100 JBL BIKE SPEAKER HAS BETTER BASS SOUND THAN THE SOUND SYSTEM IN NEW CHEVY SIERRA. SO I STILL HAVE FAITH IN JBL.
The woofer's watt??? RPM
read in the description
The tweeter looks like made by LG...lool...
Я конечно не спец, но мне кажется что наклейка на динамике для понтов, а такие динамики ставят на колонки и других производителей, Microlab например, или Trust))) На самом деле выбираю между ими и presonus 5xt...
Super
does the new one hiss as well?
They have a very small hiss, nothing to problematic, you would only hear it if the room was dead quiet or where quite close to them
They hiss all the way down to 1 decibel. Just like the lSR 305 first Gen.
@@Aharshreality9281 that's what you get with class d amp
automachinehead anything you would recommend over 305/305p?
@@cypher7031 If you're serious about monitoring treat your room first or build a non-symmetrical room entirely draped with felt and go buy a pair of Behringer B2030A. Borrow a calibrated mic, measure, eq for flat response down to 30hz which would sacrifice ~10db of perceived volume. Borrow an oscilloscope and test for input voltage clipping, then set input trim at the back of the speakers. Listen nearfield.
could you please do the test on Adam audio t7v or t5v thank you.
Perfecta indagación a productos de marca!
Need to do video on a Rockville montior
@Infinite Revery u right bad buy I end up getting Yamaha hs7
@Infinite Revery cool ..I love them
@Infinite Revery yes I had friends over and they thought I had a sub..
Very nice sir yahmha ka tutorial please
Why my speaker wont turn on is it the ac
Soul Ranger yeah turn the heater up a little
nice...
Make yamaha hs8 if possible
🔊👍
So JBL put cheaper components in the new version. And it already has a reputation of buzzing and hissing.
Penginnnn... tpi gk da duwit di ksh mau
Best tear down...
Damn that sucks. I mean plastic front panel
That looks very cheap but don't think it would affect the sound that much.
for its waveguide, it should be made of plastic. of course the important reason is for low build-cost. however it is thankful for good sound from low price! the sound of 3-series has been proved by many users.
if someone needs more higher built quality, he should find 7-series or m2, which the reference monitor speaker in jbl product lines.
смысл дырявых перчаток? уже б убрал их
"...1nd Gen."???
1nd - what is it? oned?
первое поколение и второе поколение
@@chicagomen01 ну т.е. 1st и 2nd. что такое 1nd?
опечатка@@BuchGalstuk
Пластиковая панель! Боже мой... мониторы... профессиональные... аааааа
За эти деньги лучше нет!
@@sportsnen yamaha hs8 в сто раз лучше.Сейчас начнёшь мне рассказывать за невероятно дорогой звук жэбээл, потому что видел это в обзоре канала djshop.by. А теперь заходи на equipboard и находи в поиске ямахи, а затем jbl.Сколько знаменитых имён используют именно ямахи, а ребята при деньгах.Так что давай-ка ты дядя сиди и крутись на своём стуле, да включай свои свеновские колоночки погромче.
@@tyya2168 Некорректно сравнивать.Ямахи и дороже и 8 дюймовки.А за "эти деньги" возможно жбл мк2 и лучшие.
За эти бабки лучше Edifier s2000pro,да и s1000 лучше.
@@РашистВатноскрепоносов Наверное ,но речь про бюджетные 5 дюймовые мониторы.
J angan. B ilang. L ain.,,,JBL bagussss,,,semua😀😀😀
Qualità prezzo € molto buona!!
Itu speker aktif ya aku mau carinya speker Pasif
Samsung !! The genuine Californian JBL's are gone, part of a glorious past.🙄🤨
Smd??bad power supply..better teroidal supply and EL core power supply..
yep torroidal power supply, class ab and h is one of the best amp types.
JBL needs to improve its boxes, and to manufacture. only 3 way
they dont need to improve boxes the box is built just fine and this is a budget studio monitor that sounds better than most speakers double its price.
Конечно нужно, но ты заплатишь в 3 раза дороже за красивую мордашку
Импульсный блок питания. Аудиофилам противопоказано это видеть!
в добавок усилитель D класса
Обьясни не опытному... че это значит?
@@uniia_ua как правило в усилителях, для питания используют обычные трансформаторы, они громоздкие, но просты как булка хлеба, на первичной обмотке сетевое напряжение (220v) со вторичной уже напряжение ниже, 12, 24, вольта, зависит от потребностей усилителя, или двухполярное, дальше выпрямляется и все. Импульсный же блок питания, работает в режиме широтно-импульсной модуляции, раскачивает трансформатор на определённой частоте, где то 100кгц, они малогабаритные, аудиофилы аргументируют такие девайсы в усилителях неуместными, так как считают что эта частота (100кгц) привнесет в звуковой тракт неуместные частоты, что маловероятно как по мне, ведь мы слышим от 20 Гц до 20 кГц
@@uniia_ua усилитель класса D тоже работает в импульсном режиме, они обладают высоким КПД и мало греются
@@egorvolkov1183 Спасибо за объяснение. Буду знать)
Mas calidad tiene un radio transistor los chinos no hacen calidad
snot against coil whine ? snot gun in action? on the board ? why? many plastic parts, ehh, china product
Найдите два отличия.