JBL LSR305 MKII's are out!

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rjbond3rd

Re: JBL LSR305 MKII's are out!
« Reply #40 on: 24 Jan 2018, 12:09 am »
...why did they move away from the good stuff... The AKG tube mics from the 40's and 50's have better SQ than any mics made today.

Lots of current recordings (and broadcasts) are using vintage mics.

maty

Re: JBL LSR305 MKII's are out!
« Reply #41 on: 27 Jan 2018, 08:55 am »
https://audiosciencereview.com/forum/index.php?threads/lsr-305-and-308-discontinued-read-below.2272/page-2#post-62525

by amirm

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Been listening to the LSR305p Mk II for an hour so far. I tell you, nothing prepares you for the stellar fidelity these budget speakers produce! On my reference tracks it can be stunning, easily outperforming high-end speakers. I will do a review in a day or two when I have more miles on them. For now, I have to keep shaking my head on the level of detail, and absence of distortion. Level wise, I am listening at -22 to 0-15 db or so. Plenty of reserve power. I can't get them distorted before I get uncomfortable with the loudness!

The only downfall is that it absolutely will not play deep bass. It acts as if it is not even there. I think they may have smartly filtered that out. I will do some measurements to figure out. I should say though I have them out in open room in a very large space. Against the walls it may do better.

Mind you as soon as bass frequencies go up some, it reproduces them with incredible clarity. So it is not like a little whiny bookshelf speaker.

Absolutely, absolutely, incredible value and performance here! I don't care what system you have now. You need to get a pair of these and listen to them.

I am driving them with the Topping DX7 which makes a fantastic package with them. I hooked up a sub to the unbalanced output and let the balanced drive the LSRs. That gave me the lows but measurements and tuning is necessary for best performance there. Hard to imagine that this is a $600 package from DAC to amp and speakers!

[Reviews] Topping DX7

https://www.head-fi.org/showcase/topping-dx7.22584/reviews

https://www.soundphilereview.com/reviews/topping-dx7-review-1149/

External USB DAC and not internal (maybe it was the problem: noisy dac + unbalanced and cheap quality control too).

Measures: https://audiosciencereview.com/forum/index.php?threads/topping-dx7-dac-headphone-amplifier-review-and-measurements.2286/

https://www.shenzhenaudio.com/topping-dx7-32bit-384khz-dsd-usb-full-balanced-dac-headphone-amplifier.html
« Last Edit: 27 Jan 2018, 04:02 pm by maty »

maty


maty

Hiss againnnn - Re: JBL LSR305 MKII's are out!
« Reply #43 on: 28 Jan 2018, 10:37 am »
Hiss againnnnn

https://audiosciencereview.com/forum/index.php?threads/lsr-305-and-308-discontinued-read-below.2272/page-3#post-62594

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They do unfortunately. It is a hiss that is audible to about 3-4 feet on-axis. If you go at just about any angle, it goes away very quickly.

and

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Unfortunately no. I just checked and the noise is there unless the volume control is set at absolute zero. After the first notch the hiss comes and it's level does not change with volume.

maty

Re: JBL LSR305 MKII's are out!
« Reply #44 on: 17 Mar 2018, 06:51 pm »
JBL LSR305 tweaking

http://www.diyaudio.com/forums/multi-way/320206-jbl-lsr305-tweaking-post5375155.html

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An internal cross-brace made -25dB reduction in resonant sound, measured with backplate opened and knockin the side panel. Distortion peak measured at 60m (2') was reduced too. Me happy for solid 1 hour "work" on these. I hope that my daughter willl be happy too for her new desktop speakers!

You need to be registered to see the four pictures.

The the same can be done in the new.

[Customer reviews] https://www.amazon.com/JBL-2-Way-Powered-Studio-Monitor/product-reviews/B077N2GQXC/ref=cm_cr_arp_d_viewopt_rvwer?ie=UTF8&reviewerType=avp_only_reviews&sortBy=recent&pageNumber=1

maplegrovemusic

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  • Please Be kind to your ears .... Treat your room
Re: JBL LSR305 MKII's are out!
« Reply #45 on: 17 Mar 2018, 08:56 pm »
Maty , why so much time and effort about this hiss situation ?  One person out of a thousand have setup issues causing a hiss . Not what the other 999 people experience

maty

Re: JBL LSR305 MKII's are out!
« Reply #46 on: 17 Mar 2018, 09:47 pm »
I do not know the percentage but the problem exists or has existed. New buyers have to know as much information as possible.

There were those who denied them so I put links weeks ago.

Those who have the old or the new ones already know how to reduce the boxes resonances spending almost nothing -> better sound with good recordings.

maty

Re: JBL LSR305 MKII's are out!
« Reply #47 on: 17 Mar 2018, 09:50 pm »
http://www.diyaudio.com/forums/multi-way/320206-jbl-lsr305-tweaking-post5375313.html

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So these cheap boxes suffer from various rattles and resonances in the cabinet, plastic front plate, metallic back-plate and wires wibrating etc. The loudest noise came from the box panels ringing like a bell with signal of 240Hz and around. 2nd harmonic means buzzing at 480Hz, 3rd ringing at 960Hz etc.

Resonances from cabinet walls and other mechanical parts are usually easy to fix. But if I wanted to make these hi-fi, I would construct new heavy cabinets, fill the backside of plastic front plate with something heavy and puttery and place the amplifier board outside the cabinet or in an isolated chamber. I am sure that the wise engineers at JBL know this too, bet they had to fit a certain retail price and still make profit with manufacturing! Nothing wrong with that!

Focal Alpha 50, 65 or 80 are much better options without any doubt. They are more expensive but they do not have those defects. To listen very good recordings. And without cheap class D amplifiers.

hibuckhobby

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  • On a search for audio nirvana
Re: JBL LSR305 MKII's are out!
« Reply #48 on: 18 Mar 2018, 02:29 am »
You seem determined to continue your criticisms in spite of others being satisfied.
Since you've stated your views in the past, what benefit do you imagine going over
them again?

maty

Re: JBL LSR305 MKII's are out!
« Reply #49 on: 18 Mar 2018, 08:25 am »
Before it was the hiss and now the resonances, they are different problems.

We are talking about hardware, it is not personal.

fredgarvin

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Re: JBL LSR305 MKII's are out!
« Reply #50 on: 18 Mar 2018, 03:16 pm »
Before it was the hiss and now the resonances, they are different problems.

We are talking about hardware, it is not personal.

Personally, I enjoy your analysis and delving into the workings of audio products. Certainly JBL would not be bashful in the scrutiny of their product.

maty

Re: JBL LSR305 MKII's are out!
« Reply #51 on: 19 Mar 2018, 11:05 am »
http://www.diyaudio.com/forums/multi-way/320206-jbl-lsr305-tweaking-post5376826.html

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This file will make LSR305 transient perfect when playing from Foobar.
Download "convolver" for Foobar and put this file "FIR.wav" to it.

After that 305's will play meander and will have ideal Step response when playing from Foobar.

You need to be registered to download the file.

Many others soft players have convolver. JRMC for example.

Huck

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Re: JBL LSR305 MKII's are out!
« Reply #52 on: 19 Mar 2018, 11:27 am »
http://www.diyaudio.com/forums/multi-way/320206-jbl-lsr305-tweaking-post5375313.html

Focal Alpha 50, 65 or 80 are much better options without any doubt. They are more expensive but they do not have those defects. To listen very good recordings. And without cheap class D amplifiers.

Dumb question,but why does this Alpha line have no volume control??
I thought all powered speakers had volume controls??!Thank,Huck

maty

Re: JBL LSR305 MKII's are out!
« Reply #53 on: 19 Mar 2018, 11:53 am »
Money, money and because in PA the people have mixers. A cheap analog mixer:

https://www.thomann.de/gb/phonic_am_85.htm



Those potentiometers are for gain adjusting although many Hi-Fi users use them for volume. Usually they are in the back of the boxes. With a cheap preamplifier, DAC with preamp or DAC with full DSP.... or:

Monitor-Controllers

https://www.thomann.de/gb/studio_monitor_controllers.html?oa=rat

https://www.thomann.de/gb/studio_monitor_controllers.html?oa=pra

If you only have RCA outputs (like HiFi users), a cheap passive potentiometer is enough.



Huck

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Re: JBL LSR305 MKII's are out!
« Reply #54 on: 19 Mar 2018, 11:55 am »
Yeah...that makes sense...so I guess my Benchmark DAC1 USB won't have enough gain to power these properly ?Thanks,Huck

witchdoctor

Re: JBL LSR305 MKII's are out!
« Reply #55 on: 19 Mar 2018, 02:30 pm »
The problem is the same: cheap class D amp.

So where you gonna get a cheap class a/b amp to mate with passive speakers?
Oh yeah, and the speaker cables you will need (which you don't need with active speakers)

randytsuch

Re:'s are out!
« Reply #56 on: 19 Mar 2018, 03:09 pm »
The Focals seem to be around twice the price, I would hope they sound better.

I have one of the original LSR305's that I connected to a pi and dac to make a stand alone wifi speaker.

Sure, it's not perfect, but for the price sound good to me.

Randy

maty

Re: JBL LSR305 MKII's are out!
« Reply #57 on: 19 Mar 2018, 03:23 pm »
[French review] Focal Alpha 50

https://fr.audiofanzine.com/enceinte-active/focal/alpha-50/editorial/tests/focalpha.html

[IMG] https://medias.audiofanzine.com/images/normal/948527.png

Focal Alpha 50 en jaune et Dynaudio BM5 mkIII en bleu

* Focal Alpha 50: 258 €

* Dynaudio BM5 MKIII: 389 €

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Sure, it's not perfect, but for the price sound good to me.

Off course. The key is in what kind of music you listen to and its recording quality. Modern/commercial music is very bad mastered, very bad. With DR < 8, 9 or 10 dB. And if it is over in MP3 or other loussy formats ... it is ilogical to spend a lot of money on the audio system.

I always emphasize that I mean very good recordings.

There are more measures in Diyaudio thread.

charmerci

Re: JBL LSR305 MKII's are out!
« Reply #58 on: 19 Mar 2018, 03:34 pm »
I know you are about good sound but if you are going to recommend an alternative to the JBL 305's you have to give us alternatives that are approximately the same price per pair as well as an amp to power them!

maty

Re: JBL LSR305 MKII's are out!
« Reply #59 on: 19 Mar 2018, 03:35 pm »
For me is more important what xrk971 -I greatly appreciate his criteria and contributions- says:

http://www.diyaudio.com/forums/multi-way/320206-jbl-lsr305-tweaking-post5376893.html

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It was a bit disappointing considering all the rave 5 star reviews I read prior to buying them. Also, the published response was flat - not waivering like this.

Anyhow, even at $210/pair I did not think they were worth it. The mid bass was lacking presence and sound was just not clean enough I ended up returning them. The value would have been incredible had they sounded good. But IMO, a well designed passive 2-way with a solid cabinet and decent but budget drivers sound better.

Certainly, the GR Research XL’s are superior in flatness of response and distortion. Just missing the waveguide.

http://gr-research.com/x-lsencorekit.aspx

Speakers with good coaxial or tweeters with waveguide -> great dispersion -> magic sound, fills the room.