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In Reply to: RE: Best Passive/Active Combination of Crossovers for IIIa's and T 1-D's posted by computerman on June 29, 2015 at 05:34:52
Neo is referring to a passive crossover implemented ahead of the power amplifiers. "PLLXO" is a passive line-level crossover. In that case, source output resistance and load input resistance become very important.
Reading your original post again, it seems you're not aware of the PLLXO approach and your "passive" interest was only regarding high-level crossovers between power-amps and speakers.
The DCX2496 is fairly dated unit and it was designed for the professional market and not the consumer market. Thus, there are all kinds of issues regarding noise, signal levels, etc, etc, that can rear their head. Most users who continue on the DCX2496 usage path are eventually forced to modify it for superior operation. Here's one excellent example:
http://linearaudio.nl/dcx2496-active-output-mod-6-channel-vol-control
Dave.
Follow Ups:
Thanks for the explanation Davey. I am also considering purchasing some Kenwood LC-07 especially since I missed the DEQX this time around. Could I then use the PLLXO approach? I did think that the XO at the speaker was the same as PLLXO.."more will be revealed" :) That is one of the reasons I love this site. I learn so much while not being judged for my inexperience.
In addition I sent an inquiry to Pilgham audio who supply the mods for the DCX2496. What do you think of the final product? Is it worth doing? Lots of choices to make.
Thanks again!
Yes, it's worth doing....if you're going to commit to the DCX2496 for a while. There's nothing wrong with the DSP portion of the DCX.....it will perform all the crossover/equalization/etc that you need and the PC software interface is fairly intuitive. The downfall is in the analog portions, and the excellent modification designed by Jan Didden solves all issues.
Dave.
awesome! that seems as if it is the least expensive way now as I have it paid for already..and the update done by them should be reasonable enough. I am waiting for a price and I will update you as soon as I have it. Only drawback is that it has to go to the Netherlands which increases shipping costs and time. Seems like an excellent company.
I am seriously contemplating selling my Rotel RMB 1077 as I no longer do the multichannel thing and also considering purchasing some Kenwood mono blocks LM 07 is the correct model. I read a review referred to by the present post about the 3.7i's and the reviewer stated that they were quite satisfied with the sound using the 3.7i's and the kenwoods. There is a pair that is reasonably priced on eBay. Any thoughts on them?
It is worth looking for a US based modster doing the same alterations to the DCX.
Try tweakaudio to see if Ric Schultz is still doing this.
As soon as I have a quote, I will post it here and the tech who is going to do it. Thanks for all the suggestions...any comments on the Kenwood L07 M mono blocks? Refer to the post on the 3.7i's There is a review that uses them to drive the 3.7i's and they were quite satisfied with the sound. They are quite reasonable to purchase also. I would sell the Rotel as I no longer use it for multi channel, then use the Kenwoods for the mids. I would for now use the ADA PF-200 for the tweeters or the Rotel until I sell it. I could swing the Kenwoods, depending on the price of the mods for the DCX.
No no no. The kit could be purchased from Pilgham and a qualified local technician could install it, but there's no way I'd let Ric Schultz touch it.
Dave.
Very glad to know thanks!!
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