In a ported speaker, I wouldn't bother. Besides, it could alter the voicing of the speaker enough where some crossover adjustments would be need.
I do not like the boards on the RT series. In comparison to what Def Tech and Monitor Audio uses - I would consider their board quality to be substandard. Not to mention the soldering seems sloppy in comparison to the LSi. (Just my observation)
thanks maudioguy for saying oh so politely, "stop whining! Get off your duff & do something about it!"
Alright - here we go!
Im waiting on resistors from Canada - so this is my stopping point for now!
Looks good, cant wait to hear them.
Me either - It always amuses me how these awesome crossovers sound with free air drivers ;)
But seriously - cant wait to hear your impressions! I am sure you will love the change!
I like constructing these - its kind of like a puzzle..
How tall are they going to end up being? You have a test bench you hook them up to test them out before shipping them.
Around 8" or so - Yes! I always test them out before I ship them back!
Resistors are here except one - my fault - DOH!!!
But I think they turned out pretty bad ass if I do say so myself!
Not to add fuel to the fire on a previous discussion but there is -zero- high pass filtering on the midbass. It is playing everything.
(I have them running free air)
I am also using a bi-wire cable as well
That looks like a lot of work.
I tell ya what - soldering the top caps on to that board in that 1.25" space was a treat!!
Do you think there's a concern with the plastic tabs breaking off the binding post plate with all that extra weight hanging out so far? Not a criticism, just my own curiosity.
would you mind sending me via pm, how much a mod like this would cost. i have always wondered about the full potential of the a7.
With the CSiA5 thrown into the mix it was right around 319 bucks - so I am guessing.... 220-250 for the RTia7...
Obviously that is with the parts used here
Assuming all of the woofers are 8 ohms (I am using 8 ohm woofers for the load) - the crossover measures out at 5-6 ohms vs. 8 ohms -- very interesting
Gotcha - well that should be here tuesday so we will get to the bottom of this! HAHA!
Yeah I ordered the Dayton measurement software with test leads and scale yesterday - so it should be here Tues/Wednes
That sounds pretty cool and doesn't look like it will break the bank to buy. I would like to see your review of this when you get it.
I would think that the nice poly caps should be dropping the impedance quite a bit from the cheap electrolytics in the original crossovers.
Yep - I have already ran yours free air and I put a volt/ohm meter on them. Everything seems fine - I will definitely check them with the software as well!
Polk Audio CSiA5
This is on the edge of my HiFi physics but I will put myself out there for the masters to educate. So to the the best of my understanding:
All capacitors have a rating of DF or Dissipation Factor for AC.
The DF for most Poly Caps is very small, fractions of a percent so they are close to an ideal capacitor.
Electrolytic Capacitors have different DF ratings depending on quality, but 10% is probably standard for inexpensive capacitors.
This higher DF rating results in a larger reactive load or put another way, impedance.
I am starting to worry about the pressure of doing a review since I only power them with a Onkyo TX-NR808 avr, and dont have an audiophile ear.