The Two Channel Advice Thread

Discussion in 'Advice Threads' started by purr1n, Nov 10, 2016.

  1. AdvanTech

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    Heard from a few people that Purifi has less heart than Hypex NCore. Some of the GaN stuff doesn't seem to be well-received either, but I'm sure implementation is way more important than transistor types so there might be something GaN that isn't bad.

    Class D is fine if you're looking for something power-efficient that isn't too heavy to move around. Class D can sound 'pretty good', but if power efficiency and weight aren't that important to you, maybe you should be looking elsewhere for more emotional engagement.

    Also, tried a VTV NC502mp amplifier for handling bass woofers in a bi-amping config. When I tried it as a full-range amp, for fun, it never made me say, "okay, just one more song."
     
    Last edited: Oct 17, 2022
  2. dericchan1

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    Thanks, simply speculating at this point, it might just turn out the K3 amplifier will be good enough I can live with for the next little while. After all, Monitor audio owns Roksan and the K3 amplifier was designed to work with Monitor audio speakers. Schiit Tyr does sound promising!! cheers
     
  3. dericchan1

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    Hi everyone, further to the earlier discussion re: class d amp, i ended up traded in my monitor audio silver 300 and the Roksan k3 amp for a pretty reasonable deal on a few weeks old NuPrime Evolution STA hybrid class d amp, after reading this review and auditioned at the store.

    https://www.theabsolutesound.com/articles/nuprime-audio-evolution-sta-power-amplifier/

    still waiting for my new speakers to arrive to see how the new system will sound.

    With the new changes, I will need longer run of speaker cables, any suggestions for speaker cables that won’t break the bank?

    Cheers
     
  4. AdvanTech

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    What does 'won't break the bank' mean to you? What range are we talking?
     
  5. dericchan1

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    I am potentially eyeing some pro cables say canare 4s11 or Morgami W3103 with decent banana plugs or spades prob <$200?
     
  6. AdvanTech

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    sounds like something from Worlds Best Cables on Amazon. They make different versions of exactly that.
     
  7. bixby

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    I went from up to $2k spkr cables to Canare 4s11. This cable is fine especially with bare wire connections. They all have just a bit of difference in sound and the Canare does not seem to do anything wrong.
     
  8. Climber

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    Blue Jeans Cable also offers the Canare -- worth a look particularly if you need custom lengths or terminations.
     
  9. dericchan1

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    Thanks guys. Will probably focus on looking at the canare 4s11 vs morgami w3011 and see if others noted any differences.
    I suppose either one would be just fine

    cheers

    Deric
     
  10. Garns

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  11. dericchan1

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  12. bixby

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    fwiw, I tried the Supra wire a dozen years ago and found it to be rather soft sounding. Did not work well with my setup at the time. I do like their power cable wire though.
     
  13. dericchan1

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    A buddy brought me a pair of older transparent musicwave and a pair of Inakustic reference LS502 cables to try. I found the Inakustic cables slightly warmer, fuller character matched slightly better with the neutral sounding PL200ii and the nuprime amplifier. The rca red plates 5692 tubes in the Freya +also helps with adding a sense of warmth and smoothness to the system.

    The system is sounding really good so far!!

    cheers

    Deric
     
  14. beemerphile

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  15. fraggler

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    With the introduction of the desktop power amps from Schiit, I have been thinking more about the real power needed. Is there a relatively easy way to calculate how much power I am really using while listening? I have a tiny home theater/speaker space that I'm tempted to triple mono for the L C R speakers.
     
  16. Armaegis

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    Play a reference tone/sine wave. Turn up to your loudest listening level. With a multimeter measure AC voltage at the speaker terminals. Power is P = (V^2)/R where V is what you measured and R is the load of your speakers (assuming it's a flat number which isn't true, blah blah)
     
  17. Collusion

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    Or if you don't have a multimeter, but have an SPL meter:

    1. Find out the sensitivity of your speakers, which is something like 85dB (1W/1m)
    2. Play something at your loudest listening level (preferably a 1kHz sine wave) from a single speaker.
    3. Measure the sound pressure level from a 1 meter distance.
    4. For every 3dB increase from the speaker's sensitivity rating at 1W, you need to double the required amount of power. Example:

    85dB = 1W
    88dB = 2W
    91dB = 4W
    94dB = 8W

    Et cetera
     
  18. AdvanTech

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    That's assuming the manufacturer was honest about their speakers sensitivity, which isn't usually the case.
     
  19. Armaegis

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    it's usually around this point where the wife sees me fidgeting with wires and doodads like the goblin I am, doing everything with the audio gear except listening to it o_O
     
  20. bigant

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    My wife lost her shit with me once for repeatedly playing the tones on a setup LP. Always set up cartridges when I have the house to myself now.

    Other problem with using the sensitivities quoted by manufacturers is some use the dB/2.83v/m 8 ohm watt figure, as does John Atkinson in his measurements. I suppose as a value It is more repeatable, and easier to measure at home, but that's a 6dB difference between 4 and 16ohms. (Possibly 12dB? seem to remember a 10x multiplier for Power but a 20x multiplier when converting voltages and SPL's to dB. Its a long time since I was at university)
     

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