Working days are always busy.

Anyway, I left my M3300 to other person before I try upgrade to TDA2050A or LM1875. But changing to metal film resistors does greatly improve the overall soundings, like replaced to premium wiring. Adding 0.1uf or 0.01uf on each signal path electrolytic cap also give extra gooding to sound

The factory already tuned it properly, don't modify the woofer or the box but for electronic part yes.

I like the sub design

Quite a while not active in this thread already, was into a working life currently. Tried to free a little time do a light modding on my R2500 and quite a good improvement overall, but felt a little thin sounding when powered up.



Found some leftover cap that I used to mod my M3300, now I use it for my R2500. Indeed still a good cap for audio.



Replaced the NE5532 to my favourite Op-Amp, LME49860.



So the 4700uf 35V is for the main power supply filtering, adding another 0.1uf film cap can helps further remove high frequencies interference noise. Notice that board has charred on the top left?



So it should be the resistor and diode was too hot that cause the board to charred out, the caps were expanded too. That should be the power supply cap for control module on the right side of the speaker, no wonder I faced some problem on controlling the volume where sometimes pressing volume up and down will trigger to input switching function. I guess time to do some upgrades, it has been turned on 24/7 for years.

The upgrade made the overall sound a lot more detail and wider sound stage, doesn't feel boxy sounding. Does found it a little glare on highs but I think it will be okay after letting the power supply caps to run in for some period of time.

Yes, it would be a good upgrade if space isn't a problem.

It can be your connector or jack oxidized.

Check your pc connector or try plug it to other source to verify the problem.

I had mine running moderate loud using phone, but mostly playing it using pc sound card integrated with amp.

I think you should go for warranty.

H850 is about the same as normal headset sensitivity but better sound.

Just to share my listening test on my R2500.

I would suggest put the speaker grills on for best listening experience as you'll get more balanced sounding and has great depth and sound stage. This is due to the speaker diffraction is reduced with speaker grills.

This should work on other Edifier speaker too...

During purchase most probably the area is noisy so you can't notice the noises produce from the speaker.

Did the noise still there when the speaker volume is at the lowest? And does it reduce when you connect to audio source?

Looks like the amplifier amplifying the noises because of the volume was turned too high on idle.



This post has been edited by Cosef: Mar 1 2015, 02:42 PM

Put something to slope up your heighten up the speaker (e.g door stopper, food container, wood stand, etc.) until the line of tweeter and midbass is with your ear level.

Run in the speaker with louder music volume for certain period of time.

Hope that helps.

The original speaker cable and interconnect wasn't that bad.

I'm not sure you had a defect unit or not, maybe you can try look for the seller for replacement.

AE Aego M still can find, just now the price is higher than last time.

Budget 5" monitor there are R2500

R2800 was using 8" driver, R2700 was 6.5"

Usually 2.0 would be better for music listening for much easier to get balanced overall soundings.
2.1 speaker do sound good, just the matter of sub integration needs a little careful, like positions and volume.

For R1700BT and R1800TIII would be better you audit yourself, but do take note does the volume control position will bother you or not.

What I observed is M1386 is same as M1385 but using digital input signal control and added features. Probably running away from oxidized pot.

Yup M1386 is the one you should go for, the digital volume control so far has consistent performance and balanced L/R soundings so far after long use.

Yes, but don't expect it to rock the whole condo unit.

Would be better you try audit them at few places first before you decide.

You should mute or turn off the speaker before unplug the jack. This is because the connection is floating and it will pickup random noise and output to your speaker.

Time did pass very fast.