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Power Amps, An Overdue Addicts Guide

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It is very musical and conveys the emotion very well, it is just not coloured, I read varies peoples opinion about the amp and in my opinion it shows other issues with the overall system make up .it goes very well with my valve icon audio pre. my speakers are the Aurum Cantus grand supreme and the tweeter is so clean with excellent detail , I think that it matches the amp very well. if you get a chance to hear one at home do so.

My concern is that my Ming Da preamp MC-300-PRE has an output impedance of 600 ohms which would appear to present a difficult load to a power amp with an input impedance of only 10 Kohms?

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You can get a home demo from Magenta hifi, you would be able to try it at home for a few weeks, if it is not suitable mark will refund your purchase price. this was offered to me when I made my initial enquiry.

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You can get a home demo from Magenta hifi, you would be able to try it at home for a few weeks, if it is not suitable mark will refund your purchase price. this was offered to me when I made my initial enquiry.

Thanks I'll make an enquiry.

Meanwhile, can those with more knowledge than I have comment on the impedance matching issue?

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I did a Google search on Longwood audio and Halcro and all I got was some old forum posts from various places and nothing really useful.

The Magenta site has some minimal product descriptions and no pricing at all.

 

I guess more info may be available in time.

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My concern is that my Ming Da preamp MC-300-PRE has an output impedance of 600 ohms which would appear to present a difficult load to a power amp with an input impedance of only 10 Kohms?

 

It's not possible to present a difficult load at an amplifier's input, because the term 'load' refers to the termination impedance.  

 

For a preamp, a 600 ohm output impedance is a bit higher than normal but there shouldn't be any problems driving 10k ohms. The main consequence of a 600 ohm driving impedance is premature HF roll-off, which will occur if you're driving a long or high capacitance interconnect cable, or into a power amp with an input filter that's designed to be driven from a significantly lower output impedance.

 

If you keep your interconnects short there should be no problems.

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