[rak313]

Danny,

I am new to AC, although I have lurked for a few years now.

I have a pair of ls-6s (from AV123 received new 8/2008) and am thinking of adding a LS-C or N3s for a center (or even the Carnegie Acoustic CSC-1 - if you still have them) . 

My receiver is in need of upgrading, and I am thinking of getting a professional amp like QSC or Beheringer or other.  Some of these amps have built in digital  crossovers for bi-amping.  They take the analog amplifier input, A/D --> digital lowpass/highpass --> D/A --> output to a pair of amps.  While it does introduce an additional A/D-D/A step, it eliminates the electronic crossover and any issues with quality of inductors/capacitors/resistors.

The setup options on these electronic crossovers are pretty limited, eg. center freq and slope. 

I so I have 2 questions for you:

1) do you still have and of the CSC-1 centers? (even though the LS-C is pretty - it still has size issues with my wife)
2) What do you think of modifying the  LS-6 for electronic crossover? (or other of your speaker designs).

Thanks

Rick

[Danny Richie]

Carnegie has plenty of the CSC-1's left. So no issue there.

I wouldn't use any of those digital crossovers with the LS-6 though. That would be a huge backward step. There is a reason that those units are so cheap. The quality of the parts involved are about the same as what you get in a CD player that you buy from Walmart for $49. Yes, the quality of the D/A conversion is that bad.

Stick with the passive crossover and put your money into a good DAC.

[rak313]

Thanks for the response.

What I had in mind was a QSC DCA 1622 or DCA 2422
http://www.qscaudio.com/products/amps/dca/dca2/dca2.htm

with the X3 digital crossover plug in
http://media.qscaudio.com/pdfs/manuals/Cinema_Accessories_revB.pdf  This combination is aimed at professional cinemas. 

While I can't comment on the quality of the A/D D/A in the X3, I would think the A/D D/A of the QSC PLD line is good.  This product line is intended for use for live performances in large theaters, and includes programmable crossovers, and equalization.   

http://qsc.com/products/Power%20Amplifiers/PLD%20Series/

[Danny Richie]

That gear is designed primarily for the pro market.  A digital crossover like that is not something you'd want to use with a high end speaker like the LS-6. Stick with the passive crossover and get a good quality DAC and the end result will be MUCH better.

[Danny Richie]

And rak313,

Welcome to AC.

Feel free to post here anytime.