Greg in Okla

very true a timbre matched 5 channel will sound more uniform.Even mismatched I enjoy the set up as it is now,I have beeen thinking of getting 4 of the Parts Express MTM speaker kits and retire the JBL's.I have heard good stuff about the Parts Express kits,they use very good drivers and are well designed

I did some research on the Dayton amp,and the cutoff is 18 hz,So I can use the 6dB of boost the EQ has ,set the bandwidth wide,and have really strong output down to 20hz or so,and maybe still be ok on the port noise..

Although its not a bottom feeder ,ah F3 of 23hz should be great for most movie soundtracks,as most dont go super low,and I can use the parametric EQ to boost the lower frequencies between 23 hz and 20 hz.

I believe you are right about the 20 hz filter,I thought it was either 18 or 20 hz,couldnt remember.So my lowest frequency is pretty much my F3 @ 23 hz.I know the box size and port tube size isnt optimal,but even so ,this thing puts out some crazy SPL levels now.Like I posted earlier ,with all other amps/speakers shut off .It did 116 dB at my seating position on the lighting scene or "War of thre Worlds" I am using the 1000w Dayton amp.So even at non optimal levels,the Titanic gained a lot by adding the port .

yeah.port air speed should be to the moon.But I am not hearing much port noise for some reason .Maybe its one of the frequencys I am deaf to . LOL

Even with the box being a little small.the the really puts out some sound.With all other speakers shut off,it has hit 116 dB,which is scary loud!

I traded a set of speakers I had about $600 in.The speakers are darn near perfect,all the drivers were rebuilt recently,My friend got then from a small used epeaker/old stereo stuff store,its a really cool place,He gave $750 for them,The bottom 12 in driver is a passive radiattor.Yeah, these old JBL's rock!

The subject pretty much says it all.Since you can get some of the very expensive older speakers for reasomable prices now.The build quality blows away what is available for the same price ,and quality.I am using a pair of restored JBL L150a's for my front channels,they were $1500 a pair back in 79-80.I know they dont match the ret of my speakers,but they are in mint condition and really rock!I am powering them with a Rotel 130 w amp offf a Rotel 1055 reciever.

I just added a port to the stock Titanic box

I kmow the box is a little small,but my friend Robert did a unibox simulation ,and it turned out real strongIt has an F3 of 23hz,anFB at 20.Shows 110dB@20hz and 115dB @ 25 hz.It needed a 3in X18 port,so I ran down tothe hardware strore and got a piece of plastic pipe,didnt want to spend any real amount of money getting the pieces at P.E.,till I knew I liked it i WATCHED "War of the Worlds" on scene 3 with hthe lightning it was bounceing around 112 dB and maxed at 116 dB,Needless to say,I am very happy with how the projest turned out,my Titanic in now quite a beast! lol