usbdevice (author) says:
yeah. i just found out that you can use DC batteries to power up AC amplifier, but it must have greater voltage. so 12V DC can be used to power up 9V AC speakers. i have not tried this, but you can read the articles in other battery-powered speaker instructables... just read the comments section.

at first i didn't believe it'd work. then i look at another simple 2.0 battery-powered speaker. most of them runs on 9V AC (~ sign) transformer. yet can be powered by 9V battery. lol i read some comments saying it should work better with 12V DC. so well, i just assume it'd work.

when i'm back in hometown im gonna hook it up to my M3300 amplifier which demands 12V AC transformer. see if it can works. if it didn't. im gonna update the article. haha

DC to AC you need a frequency generator to generate 50hz frequency and step it up with a transformer. You can refer to switch mode power supply.
M3300 requires dual power supply like most amplifier design, which means +12  0 -12. You need to check the amplifier is single supply or not before you can hook it up directly with battery supply. If I didn't not remember wrongly, old Altec Lansing speaker is using 12V single supply, I did hook it up with RC car 9.6V battery pack before and it works nicely.

sifu...any sound card or DAC recommend for pair S730~
Budget up RM 800~

Just came back from that MPH bookfair in Mid Valley...

took a visit to the other side of the fair and saw

they got Edifier booth there O.o
but knowing that it is not held by Edifier I am sad to say none recognized me.

but it's still cool that I'm able to test out the speakers that I didn't test yet; and also to get new Edifier leaflet with new sets of products to show on paper

lol sadly not those high end ones. (got many that I didn't get to test full potential but I'm able to test it today)
just the low/mid end ones like:
P2060
P3060
P3080

and many more normal stuff like M1360, M2300, etc
new speakers I see in the leaflet got la
updates like:
R88
R101V
R101PF
M1370
R2500 - Studio 5

and many-many more headphone series

Edifier bought over Japan electrostatic headphone manufacturer Stax.

STAX electrostatic earspeakers are widely used throughout the world by discerning audiophiles, professional musicians, and recording companies to enjoy and monitor sound. This is because of the superb sonic quality of STAX electrostatic earspeakers. In general, better sound quality is available with earspeakers than with loudspeaker systems due to several factors.

yes the R2500 is a 2.0 bookshelf speaker

here I type the specs out:
R 2500-Studio 5
Total Power Output: RMS 50W (25W x 2)
Calibrated flared bass reflex port, in front of speaker cabin (O.o front ported)
Side mounted control panel with SD,USB,AUX input
Separate dedicated amplifiers for bass and tweeter drivers

didn't mention the size of the speaker drivers or the cabinet dimensions tho

will scan the pic and share it here if I am free XD

dunno bout the availability but there are many yet to be released here
and I wonder where is the Edifier MP15 Plus? I want one lol

oh and the P series... I never get to test them fully with my favorite tunes. Today I get to test them so I consider it as a new experience.

Edifier bought over Japan electrostatic headphone manufacturer Stax.

STAX electrostatic earspeakers are widely used throughout the world by discerning audiophiles, professional musicians, and recording companies to enjoy and monitor sound. This is because of the superb sonic quality of STAX electrostatic earspeakers. In general, better sound quality is available with earspeakers than with loudspeaker systems due to several factors.

1 full hall of loud music 

Last PC fair, we got no choice because SG start the war first, they purposely used their so called Sonic Wall to boom our booth. We inform the organizer and organizer told us they can't do anything so we decided to put a Edifier Wall to boom them back.

This time, they told the organizer they don't want their booth close to us

I smell sweet revenge LOL
lovin' edifier even more 

I think Logitech downgrade oredi lu...

the z5500 is gone and I don't think anything is more powerful than the z5500

if logitech appears in the end Edifier gonna win anyway LOL

sheesh... fanboy talk

Yeah, No sardine feel the day I brought back my C3, there's not much people in PC fair compared to previous PC Fair, Not sure is it a matter of time or not because usually I go pc fair at last day, But lessons learnt last time when i bought my M1310 Instead of getting a pair of free ear buds I end up taking the Cap home due to free gift no more    But still... so many people Looking at my C3 all the way I pull it with trolley, a bit embarrassed

Its hard to tell the sound, its somehow sounds like u trying to stuff a wet things in your ears... btw this bud Retail price is RM69... among the best from edifier wor...
Only one side have that sound, another side is working fine...

I've tried with both ears, even with my gf's ears...

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Added on December 19, 2011, 8:07 am

But i didn't encounter this kind of problem from my previous similar earphones such as SE HPM-77 and another model also from SE forgot what code already... which also have similar rubber... btw what is IEM?

SQ sounds ok... the clicking sound its like... U try to wet your finger and poke ur finger in to your ears and pull out(This is quite nasty description anyway) it is something close to that, I find the noise is so annoying, the previous ear phone does not have this problem and the left ear phone is doing fine as well. It sounds when u try to adjust/repositioning or push the earphone deeper in your ear... 
I guess is a problem with the finishing...

Whenever I put in my left ear phone i feel comfortable (No matter which ear I put)  , but the right one is just.... Annoying loud weird sound and uncomfortable feeling, feel my ears full with pressure 

Btw new thing I found out about is, When I pull that problematic ear plug out, I feel its harder to pull and at the same time I can feel my ear drum its like being pulling out... how come?  Makes my ear so uncomfortable... One side got pressure one side dun...

PS: I've been using ear pump for more than 5 years since I own SE W700i They should have same pressure or same feeling for both side IMO...

Its deliver to Sabah, its oversea from West to East Malaysia. I was bought a travel trolley. I have car as well. I think if deliver by airmail parcel or poslaju. The pos malaysia sure won't deliver by door-step since it was reached 30KG.

I have to go down post office to carry it myself. Hope the post man guys if they are minding to help me carry it up to my car.

Yeah. I believe they will help you because you use their services. 

Also, it is better to ask them to lend their heavy duty trolley to transport the speaker to your car.