Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: Can I use the four speakers, two with the top inputs and two with the bottom inputs(in place of a subwoofer)?
Document: I am using this product with my Creative Speaker System (Creative Digital 5700 5.1 Subwoofer system), because My Creative Digital Decoder is not working now! This 2.1 Amplifier is suit very much with my Subwoofer and Two Satellite Speakers! So I will be hope to order this type of another one for other Satellite Speakers. Then, I can use my Creative Speaker System as a 4.1 Speaker System. This is much better than through out it!Great Amp!
I bought this product and two Dayton Audio B652 Bookshelf speakers for the Left & Right channels. I also purchased a Kicker Comp 8" 8-Ohm sub to use for the subwoofer output channel. I had already seen the video reviews on YouTube and already read the reviews listed on PartsExpress dot com, so I had realistic expectations to begin with.The the crossover for the subwoofer channel is useless. I doubt it's filtering anything out of the signal.
I tried this amplifier with two speakers and a sub and the sound was horrible and very low power. Much to much bass. I had to return it there is no way to use in a car or boat you would never hear it when the engine is running.
I wanted a better set of speakers for my computer setup. I have an Asus Xonar Essence ST sound card, which as far as I could tell, was the top of the line consumer sound card at the time I got it. I'm using this with a pair of Polk Audio Monitor 30 Series II speakers and a Polk PSW10 powered subwoofer. So far, it sounds great.
In other words; if you turn the main volume down, the sub stays up. That means you'll need to preset the volume controls and use an external master volume. EX: Feed it from a computer.~The speaker terminals are really cheap.~The crossover control doesn't seem to do muchI am using the amp to drive two small bookcase speakers and I am using the sub from a 2:1 computer speaker set that died.
This amp is ok. It works for what I need. I am running two Bose speakers and a powered subwoofer that will take amplified input. The low pass crossover doesn't work so your external amp would have to have its own crossover which mine does. This will not work for everyone but for the right set up its a cheap way to go if you don't want to spend a lot of money
With this amp i know comes with a 2 amp power supply (which is weak considering you are trying to power speakers and a sub. I use this with my laptop with 2 phillips fwb mc50/17 bookshelf speakers (6 ohm) and a pyle plbt8 8 inch subwoofer (4 ohm).
First off, I bought this amplifier for home use. While compatible with cars it works for home use as well.I bought this amplifier to power my vintage RtR G-40 speakers and my Kicker Comp-10 subwoofer. Installation was incredibly easy, just plug in, connect speaker wire and you're good. For about 2 or 3 weeks it drove my speakers great.The sub, however, was terrible.The biggest feature here for the product (to me) was the subwoofer crossover.
Excelent Productwhy 4 star the subwoofer freq its bad for music good for moviezwith this amp use 2 Altec Speakers and 12&#34; subwoofer and so happy with this
But the sub output somehow switched to the speakers. Down two more stars.For the price, it works.PROS:Easy to installDelivers clear audio to main speakersCONS:Subwoofer crossover does not workSubwoofer output breaks after a few weeksAnnoying blue LED that flashes with the bassGets warningly warm even with the heatsink body
Answer: depends on the power required. This barely powers the speakers I have and the sub...but if your speakers are more efficient then you could run them in a series, but why not get a 4 channel amp.