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I have AR D76a and play stright from the CD player using gain control on the AR amp.I would like to know what I can expect when I will buy AR Sp3 pre?
What will be a difference in sound qualities?
Follow Ups:
Unless you match impedance carefully, you'll roll off the top. The D-76 has relatively low input impedance at high frequencies (30k), so you likely do not have a very good output to input multiplier. Some of that roll off effect also depends upon the capacitance of your interconnects. The lower the better. DACT offers an Excel based calculator on their website to provide the response curves.What will you lose? Some resolution and likely separation when using a traditional ganged pot which affects soundstage width. That is what I experience when I put my SP-9MKIII in the signal vs. using precision attenuators alone. I have a fortuitous combination of using a high output, low impedance source (4 volt/75 ohms) through 10k attenuators with a short 2 meter run of low cap ICs to a sensitive and high input impedance amp (1.2 v / 132k). I use the preamp solely for the phono section.
On the other hand, your passive arrangement may not have enough gain to fully drive the amp. The preamp may provide better high level dynamics in that case. That is the case with my vintage system where I drive the amp directly from a DAC. It doesn't matter to me because I rarely run the amp past the -25 db level.
rw
Frank
That will do nicely with an sp3.Is this the amp you put the k40s in last year?
Can you explain what will improve with Sp3? What will be better what will be worse?I have used Multicps as a coupling caps and Aerovox electrolitics in PS.
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