JBL ES20BK 3-Way 5 1/4" Bookshelf Speaker - Black Buy Now

I have known JBL for 3 decades as a speaker company who's speakers can take at lot of power and sound really good. I bought without hereing them, as other reviewres have stated Im glad I did. The speakers I listen to in college that played rock very loud and clear have not changed in all these years.
The engineering is assume. The front is curved at the top and the front is wider than the rear. The speaker is ported in the back for a low range of 40dbl. This is a 3 way bookshelf speaker that is large for todays speakers but small and narrow for bookself speakers of the seventies.
I mounted them on 17" metal speaker stands for a strong visual presents and to get the tweeter to ear level when I am seated. I was delight to see that these speaker can be biamped. In short, there are two sets of terminals(gold) on each speaker. From the back of your amp use your A speaker conection to power the tweeter & midrange. Use the B terminals to power the woofer. This does away with the speakers internal cross over. The tweeter & mid range pick up the frequencies they use from the A trminals and the wooker picks the frquencies from the B terminals. Remember to take the gold attachment off the speakers terminals before you biamp. You can ruin a channel on your amp by doing so.
The sound in assume. The ES30's are rated at 125 watts max./channel. My new receiver is rated at 100 watts/channel.This makes them loud.
Before I bought my speakers I already had a powered sub woofer made by Yamaha. This sub woofer(10" & 200 watts) produces sound from 40 dbl down to 140 dbl. This is deep warm base. So if you bi amp and have a sub woofer you will need a receiver with a separate out to the sub woofer.
If you are interested in a musical 2 channel receiver I purchased a Yamaha RX797 which I wrote a review for.
I am in my mid fifties, I have put togther two other systems since December 1980. In my home I've always had really good quality sound. I thought a integrated amp with floors speakers was a good bench mark. The invention of the self powered sub woofer is wonderfull for really great base > pressing the bench mark forward. With the JBL ES30's and a sub woofer you hear all the music. Play it a bit loud and it is still very clear not distorted.
My last comment is >A sub woofer should be heavy , very heavy, this makes warm base not punchy base.
Enjoy
Get more detail about JBL ES20BK 3-Way 5 1/4" Bookshelf Speaker - Black.