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In Reply to: RE: Foil Project for IIIa's posted by computerman on February 21, 2012 at 09:05:18
Yes, Since you digitize your analog, it is an all digital system.
The Classe DR15 should have no problem with the tweeter. I don't know the Cairn and it is not spec'd for 2 ohms, so I would ask first. The Monarchy SE100 are very nice for their price point, and should work fine. I would contact CC Poon at Monarchy to ask if it is ok into 2 ohms, or you should use a resistor to raise the load it sees to 4 ohms. In any case, the high class A bias means that you will remain in class A for the entire signal likely to reach the tweeter. The Classe and the Cairn will not be operating in class A that far up in power if you need to put in a resistor, (you don't with the DR15, you may with the Cairn).
The old Mac receiver is not workable without a resistor and is not a great value unless you need to fix it and are capable of doing it cheaply (DIY fix). I don't think these SS receivers are that great.
Follow Ups:
I found a Proceed BPA-2 and checked the manual online. It lists as output impedance .05 ohm. Are you familiar with this amp?
Generally, Proceed amps are very good. I have not heard this one.
sorry, didn't notice your post before.
Satie - I wanted to report that all soldering is done on the speakers to the foil and wire runs. All that is left is to do hookup wire to the XO box that is being built. I took a reading on both runs and they are as follows: foil midrange = 4.2 ohms; wire bass = 4.3 ohms. It looks as if they are right where they should be correct?
Did you see my post on the Monarchy SM 70 Pro? If not they have a special online for $588 plus shipping. They are good to 2 ohm intermittent and 3 ohm continuous. Will this work for the tweeters? If so I have narrowed down my selection to the SM 70 or possibly a Factory Built Class D 4 channel (2XSDS-254 modules) which is bridgeable. There is one on Audiogon for $700. I have a Maggie center speaker to throw into the mix as well. It would be nice to be able to use it. Once again thank you for any input!
Yes, these appear to be appropriate values for the bass and mids.
You asked elsewhere about the use of a cheap tube amp. Though it is possible, you are talking about having a 2 ohm tap or enough power to take a resistor's wasted out of the equation, neither of these things make for a cheap tube amp.
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