With stereo earphones, it is often the case that certain parts of the music, perhaps the singer, will sound much louder in one earphone than the other. However, if everything seems louder in one earphone than the other, it is likely that the earphones are damaged and may need to be replaced.
Almost always used in it's plural form ("headphones"); referred to as a singular, you would normally be identifying one e.g. "my left headphone is louder than my right one".
It is the opinion of the sentence writer that the brand "Reel Sound" provides a louder, clearer sound than other brands of headphones. The sentence is correct because it's referring to the brand "Reel" Sound, not "real" sound.
Headphone splitters are a device you can use to plug into your headphone jack and then attach other headphones to it. Headphone splitters make it so you can share music with more than one person at a time, with everyone using their own set of headphones.
the frequency, probably
Louder can be used as both an adverb and an adjective. I shouted louder than him. (adverb) My voice is louder than his. (adjective)
Louder Than War was created in 2001.
Louder Than the Dragon was created in 2004.
Louder Than Love was created in 1988-12.
They do speak louder.
Louder Than Live was created on 10-12-07.
Louder Than Words - EP - was created in 2005.
Louder Than Bombs was created on 1987-03-30.