qsc amplifiers

2»

Comments

  • heiney9
    heiney9 Posts: 25,221
    edited August 2007
    thejck wrote: »
    any thoughts on using the gfa-555 in bridged mode vs the 565
    i dont have a way to listen to them both together. just looking for thoughts and suggestions

    Generally in this instance you will not gain much if anything running a 555 bridged in mono. If it's mono you desire then get the 565 mono blocks. The 555 run in stereo will give more than you will probably ever use.

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
    · Share on FacebookShare on Twitter
  • heiney9
    heiney9 Posts: 25,221
    edited August 2007
    thejck wrote: »
    whats the difference between the adcom gfa 555 and the 555 II

    Use the search function as I and others have answered this question in detail many times. In fact there is a lot of info about Adcom if you just take some time and effort to do your research. :)

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
    · Share on FacebookShare on Twitter
  • thejck
    thejck Posts: 849
    edited August 2007
    thanks for that info...
    · Share on FacebookShare on Twitter
  • heiney9
    heiney9 Posts: 25,221
    edited August 2007
    Vr3MxStyler2k3 wrote: »
    No Adcom amps, as far as I know uses a cooling fan. Why would you need a cooling fan?

    This is incorrect. As an option you could buy a factory cooling fan for the 555, 565 mono's, and the Limited Edition 585. The 565's and 585 are biased in class A pretty heavily and when run with a more difficult load can benefit from cooling although not nec.

    When you bridge the 555 and run a difficult load it can benefit from the fan as well all these designs have internal heatsinks so could benfit from cooling in the right situation.

    The GFA 5800 has twin cooling fans built into the tunnels of the heat sinks. The 5800 had internal heatsinks and needed to be kept cool if running a difficult load.

    The 5802, 5500, 5400 all have external heatsinks and don't really have a need for cooling.

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
    · Share on FacebookShare on Twitter
  • askinquestions
    askinquestions Posts: 80
    edited August 2007
    Vr3MxStyler2k3 wrote: »
    No Adcom amps, as far as I know uses a cooling fan. Why would you need a cooling fan?


    http://stereophile.com/solidpoweramps/678/index.html

    This was an amp I was considering and was looking at the differnce between the 555/555 II....
    · Share on FacebookShare on Twitter
  • dexfx69
    dexfx69 Posts: 15
    edited August 2007
    I agree, Phuz.
    · Share on FacebookShare on Twitter
  • thejck
    thejck Posts: 849
    edited August 2007
    is the parasound hca1500a enough to power a pair of rti12's or should i be looking to get a second amp and biamp them to make them sound better or am i good for now. i like the way they sound but this is new to me and I would not know if they could sound better unless i actully tried it out.
    i do not listen to music at extremely loud volumes. i am using a halp p3 preamp.
    · Share on FacebookShare on Twitter
  • Serendipity
    Serendipity Posts: 6,975
    edited August 2007
    thejck wrote: »
    is the parasound hca1500a enough to power a pair of rti12's or should i be looking to get a second amp and biamp them to make them sound better or am i good for now. i like the way they sound but this is new to me and I would not know if they could sound better unless i actully tried it out.
    i do not listen to music at extremely loud volumes. i am using a halp p3 preamp.

    Yes, it should be adequate enough for RTi12's.
    polkaudio RT35 Bookshelves
    polkaudio 255c-RT Inwalls
    polkaudio DSWPro550WI
    polkaudio XRT12 XM Tuner
    polkaudio RM6750 5.1

    Front projection, 2 channel, car audio... life is good!
    · Share on FacebookShare on Twitter