As I already stated in my intruduction post, I´m investigating into buying the Proprius power amps. Buying new equipement is a lengthy process for me, considering everything I need to factor in.

Concerning the Proprius, 2 questions spring to mind;

I do realise the advantage of being able to use a monoblock amplifier close to the speaker. But in my current living situation, this simply is a no go. Now, my speakers are fairly efficient at a quoted 91dB/W/m. Speaker cables used are Mogami W3103, each 3m in length. Would this adversely impact amplifier performance?

My DAC/preamp (M2tech Young mkIII) offers two output voltage settings: 5V and 10V. I guess by other manufacturers this is refererred to as gain setting. Which setting would be the most benificial with the Proprius?

I will let others comment in more detail.

However, I think the idea with the Proprius amps is that they can be mounted directly to the speakers ("monitor" style) or they can be put on an equipment shelf or rack like a traditional amp. I have seen some members' set ups where they were side by side on a rack, with the speaker cables going out just like a traditional stereo amplifier.

I'm not able to comment on the output voltage selection from your pre/dac, 5vRMS or 10vRMS iutput just seems massive when the input sensitivity is 547mvRMS.  Others will  be able answer.

I used 3M runs of speaker cable.

Thx for the reply. 

That could indeed be considered an advantage. But I´m one of "those" guys, who is hard to convince of the advantage of expensive or esotheric speaker cables. Mind you, I don´t have trained hearing, nor am I an electrical or electronics engineer. So I can only go by my own experience. I do understand the importance of inductance and capacitance in cables (or at least I think I do). Hence I tend to stick to Mogami or Van Damme cabling.

janvda wrote: I'm one of "those" guys, who is hard to convince of the advantage of expensive or esoteric speaker cables

GOOD!

janvda wrote: I do understand the importance of inductance and capacitance in cables (or at least I think I do).

Using extremes:

If the cable was sufficiently capacitive, it would divide the amplifier output at some signal frequency (an audible frequency), which, by negative feedback, would cause the amplifier to boost its output, and eventually go pop! (or the protection circuit would operate - whichever came first).

If the cable was sufficiently inductive, it would attenuate the upper frequencies to the load, and "dull" the treble. It would also "remove" the amplifier load, and if the amplifier were not sufficiently stable, would eventually go pop! (or the protection circuit would operate - whichever came first).

Inductance and capacitance in cables are inversely related - one goes up the other comes down.

The BBC found that a heavy duty microphone cable gave the best balance between the two, and used miles of a particular brown in colour jacketed microphone cable, ignoring the shield.

The Spatia speaker cable is the equivalent of the "BBC microphone cable" without a shield, and of slightly greater cross sectional area (less lossy), and a little lower capacitance.

I am another of those guys, preferring to find sensibly priced alternatives, often using the same base cable as a HiFi offering, without the associated price tag.

Thanks!

D