Level adjusting speaker drivers

@mlsstk in your re@russ69 making a comparison between the engineering production of a song or album is nowhere near the same as adding an inline eq to change the out out. The eq will not change the levels of frequency the engineer used. It will only increase or decrease the “level” of out put for said frequency. These are two entirely different things. That being said an eq is the only option to do what you are asking for. Also be aware that an eq is best used as a way to calibrate your speakers to your room. If your room is sucking up the bass you can add more but you can’t change the frequency the producer laid down.

@sgreg1 -- I fully understand that one can't "unscramble the egg" once an album has been released. (I worked my way through college as a concert sound engineer some decades ago so have a fair idea of what goes on in a studio.) 

However, if you don't like what you're hearing on a recording, EQ is really your only option to make any change to the sound. It certainly isn't practical to start changing speakers, amps, cables and the like every time you want a change in sound quality.  Your attitude seems to be to sit back and take what you don't like.

I own a couple of Lokis (they're amazingly inexpensive relative to how excellent they are)...one for my video rig and another for the headphone amp in my hifi rig which I sometimes put in the main system if something seems to need EQ. An EQ is useful for far more than checking room effects as all recordings are different and thus interact with the room differently, but I don't use EQ often as my rig fits my room really well. I'm considering a Loki Max as operating it via remote sounds like fun and hey...who doesn't like fun? My experience with the Loki has shown it to be utterly transparent and noiseless, and I assume that the Max is also. 

Way back when, in the 50s and 60s, amplifiers used to have tone controls by which the treble and base response could be increased or reduced.  Then in the 80s we got graphic equalisers, that enabled adjustment of the response of different slices of the audio spectrum.

The latter were little more than gimmicks for the uninitiated to play around with.  This included uninformed production engineers who ruined many a good recorded performance by messing around.  To make matters worse, the circuitry employed impoverished sound quality.

As others have written above, don't go there.  Get a pair of speakers that produces sound that is to your liking.