Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Is the in-built speaker a single 10W speaker or two 5W speaker? Want to know if it produces stereo sound.
Document: This also goes for a PS3 game thats 1080p.3. The speaker that comes with the projector is not bad but not great eather its pretty much to find out where u want the projector to be in your room and testing a video source with out hooking up a suround sound system yet.4. For a first projector this is a very good quility projector.
This projector is very bright, has nice color, and very well built overall, but too much picture noise in Dark scenes.
Picture is pretty good. The sound was actually surprisingly strong for a little projector, but it got spotty and then stopped working altogether within a couple of months. Hoping the warranty process is not too hard.
I can live with this minor flaw as the only impact is that it looks funny sitting on the high shelf. But because the shelf is built into the wall and I have a motorized door to close it in when not in use, this is no problem at all.Great projector for the price!! !
This has a great picture, its bright and sharp and easy to setup. If you want an even better picture, you'll spend a lot more money!
Power Consumption Read from a Kill-a-Watt Meter:STANDBY:  0WECO-Mode: 200WBRIGHT-Mode:  234W4. Did not and will not test the speaker. I think its a useless feature for a home theater projector
Very slick unit - Runs quite, has loud speakers (relatively), and has been used thoroughly for the last 2 months without issue! Only 2 minor cons:1. The sleep feature is somewhat buried in its menus.2. The sound at zero/off, displays an icon on the screen that doesn't disappear in time. (Not an issue with an external sound system, but potentially annoying otherwise).
I purchased this projector on 9-23-13 and received it on 9-25-13 (a day after my guaranteed delivery date Amazon....tsk tsk. hate to sound like a d-bag)through Amazon Prime. I love that by the way!Ok, now to the nitty-gritty. This is the first projector I've ever used. Unless you would count the Drive-in.
its closer, its clearer its sharper. you don't have people kicking your seat.I ordered a ceiling mount and it connected nicely. I can not say enough nice things about this. for the average user who does not want to spend thousands on a projector. I would recommend this one to anyone.
The best value cinema system on the market. I bought this quite recently as an alternative to a large screen 3D TV & have not been disappointed, the quality of the picture is 2nd to none & the 3D using the ZF2100 system is amazing, there is no rainbow affect associated with DLP & the fan runs quiet with no sound from the colour wheel. It does however require a bit playing about with the 3D settings to get it right but once set it's stunning & stays in the projector memory.
Answer: There is only one speaker, but the audio output jack on the back of the unit delivers a good stereo signal to headphones I often use when watching videos late at night.