well.. i wont say that a 6.5 inch speaker wont play to 45hz
because i have some 6.5 inch 2-ways for my rears that are in a ported box that go down to 40hz
the sound quality isnt any good for the vocals.. they sound like they are subwoofers more than midranges.
but
the 40hz output also isnt very loud unless i have the amplifier pushing the speakers up to near maximum.
i would like to tell you that i know one of those two front speakers sound better than the other.. but that isnt true.
i would think the speakers are the same and the only difference is the additional 6.5 inch woofer and the bigger box.
again, having some 6.5 inch woofers myself.. that box is certainly big enough to get you 35hz
but if you want them to sound like some subwoofers, you are gonna have to turn the amplifier up to near maximum (if your amp is 100 watts or 125 watts per channel)
but on second thought, that box is really big.. so you would probably only have to turn the amp up halfway to get some boom out of 'em.
you will definitely get more from the two additional 6.5 inch drivers?
yes, you should !
but
the solo 6.5 inch cabinet says it is 100 watts
and the dual 6.5 inch cabinet says it is 125 watts
i find it hard to believe that these speakers are the same or that they will sound the same based on the watts.
45hz is quite a decent transformation point from woofer to subwoofer.
it is some of the same frequency area that they have used in the past when large paper woofers where common.
the only problem with any transfering from woofer to subwoofer is the output being louder from the subwoofer.
i havent heard these two speakers together, but i would believe they can be level matched since the subwoofer should have a volume dial.
but
sometimes lowering the 40hz really kills the 30 - 20hz
and nobody wants that.
more reason to have an equalizer.
a huge problem with some of the subwoofers available, there is no bass boost at a low enough frequency.
some boosts are at 40hz .. others at 30hz .. but i have never seen one around 20hz
and when people are buying a subwoofer, it is the 20hz area that really puts a smile on the persons face.. as it makes the frequency response extend deep and low, giving the person a satisfying feeling that the subwoofer they bought is actually doing its job.
many people get embarassed when they bring home a DJ thumping box that does the same thing a 12 inch woofer from a 3-way setup can do.
except they are making the subwoofers louder than those 12 inch woofers in a 3-way box.. and it is making it harder to blend the two speakers together.
you should probably look around for a store within a 50 mile radius to go and listen to both speakers to decide which one fis the bill better.
it might prove to be a real tough choice when/if the single 6.5 inch speaker works harder to be clean and clear.
but, then the dual 6.5 inch speaker can deliver more bass in the upper and lower frequency ranges (and maybe louder vocals too?)
it all gets hard when you try to match some speakers together without an equalizer.
you lower one half and the other half goes down the drain because you cant hear it anymore.
or
you extend the output of one speaker to help another speaker, and the vocals start to lose their clean sound.
if it were me.. i would probably try to build a custom 'do-it-yourself' speaker set (maybe all five speakers) for the cost of one set of these speakers.
chances are, your speakers would play louder.. but mine would reveal more details.
klipsch isnt really known for their clarity and detail.
their speakers get loud to fill up larger rooms.. and if there is enough air space, then the speaker can sound better from further away.
so it isnt like comparing apples to apples.
i know my midranges sound kinda like cardboard at 4ft away.. but if i sit back about 12 feet , they start to sound cleaner.
as you see the price tag on these speakers, they are ment for the new rich people who have moved into the recently built houses that have the much bigger rooms.
the speakers havent been much of an improvement for the cost of them.
but when people dont know there is much better out there with lesser known name brands, they go with what they know to be available.
i'd say klipsch are a quick escape goat for people who dont find anything better because they are still shopping at the same stores.
but i really cant make a final statement because i havent heard the speakers in a much larger room with room optimizations like time alignment and reverb.
the company might come running at me to yell.. but i would point them to the 'authorized' dealer here in town that didnt have any time alignment or setup to make the speakers show their potential.
if you have ever followed along my guide for soundcard's connected to a receiver.. then you will know that there is a bass boost within the thx setup console that can boost the lower end of the subwoofer when you turn down the volume to match the front speakers.
but
i believe the newer versions of the thx setup console only go down to 30hz
this is kinda alright.. but the version i have goes all the way down to 10hz
and that means you could use the 21hz for that subwoofer with up to +12dB of boost.
and that would be a step in an optimized direction.
it just sucks that the soundcards dont decode the new surround sound formats yet.
and even then, you cant apply the thx bass boost with a digital connection.
you either gotta find a different piece of software to do it (i looked and failed)
or
you gotta get a soundcard with high quality digital to analog convertors so you can connect the soundcard with analog connections.
i really am not going to re-build your speaker setup.
i just dont want you to have to lower the volume of the subwoofer to match the front speakers and lose all of the low low end of that precious 21hz
it makes a fun project turn miserable.
kinda like listening to 300 watts of subwoofer with front door speakers being powered by the cd player's amplifier.
20 watts doesnt match well with 300 watts.
it is just like building something with glue.. if you spend all that time to build something really neat, and the glue turns out to be junk.. then the whole thing is going to fall apart and you might not get the chance to do it again because there is glue residue on everything.