Emotiva XPR-2 and SDA/SRS?

Texas42
Texas42 Posts: 404
in Vintage Speakers
Would this amp be a good match for powering a pair of Polk SDA/SRS (first version) speakers? The amp has plenty of power (600 wpc into 8 ohs/1000 into 4) but not sure if it is a common ground amp or not (which I believe the SDAs need. Any ideas or opinions?
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  • [Deleted User]
    [Deleted User] Posts: 10,716
    Here we go! >:)
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  • FTGV
    FTGV Posts: 3,649
    edited July 2016
    As expected for its power rating the manual states it uses a differential output stage so it is not common ground.You will need an appropriate isolation transformer if you want to use it with SDA's.
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  • tonyb
    tonyb Posts: 32,962
    rednedtugent wrote: »
    Here we go! >:)

    Oh C'mon, we can be civil around here.

    WTF ARE YOU THINKING !!!!

    Just kidding...

    Not sure about the common ground issue, but that is way more power than you'll ever use. That amp might fall asleep even. :) Any particular reason your looking for that much power ?

    I haven't heard that particular amp, but if it sounds anything like Emotiva's other amps, I might pass. I know some here have it, and like it though, so take my words with a grain of salt. Personally, I'd be looking at more musical amps.
    HT SYSTEM-
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  • Schurkey
    Schurkey Posts: 2,101
    Texas42 wrote: »
    Would this amp be a good match for powering a pair of Polk SDA/SRS (first version) speakers? The amp has plenty of power (600 wpc into 8 ohs/1000 into 4) but not sure if it is a common ground amp or not (which I believe the SDAs need. Any ideas or opinions?
    FTGV wrote: »
    As expected for its power rating the manual states it uses a differential output stage so it is not common ground. You will need an appropriate isolation transformer if you want to use it with SDA's.
    First-Gen SDA SRS are not compatible with the isolation transformer. The Emotiva is a no-go.
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  • Texas42
    Texas42 Posts: 404
    I have the Emo for some other speakers I have that are somewhat difficult to drive (Infinity Kappa 9s). I also have an Emo CMX2 Precision AC Line Restoration & Common Mode Filter System. This is more for eliminating DC offset and line noise though.


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  • Schurkey
    Schurkey Posts: 2,101
    Texas42 wrote: »
    I have the Emo ... I also have an Emo CMX2 Precision AC Line Restoration & Common Mode Filter System.
    My condolences.
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  • [Deleted User]
    [Deleted User] Posts: 10,716
    thats not funny man :'(
    Schurkey wrote: »
    Texas42 wrote: »
    I have the Emo ... I also have an Emo CMX2 Precision AC Line Restoration & Common Mode Filter System.
    My condolences.

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  • nooshinjohn
    nooshinjohn Posts: 25,415
    Your speakers will not work with any mono block or non-common ground amplifier. Look to parasound, Sunfire, or another type of stereo amplifier
    The Gear... Carver "Statement" Mono-blocks, Mcintosh C2300 Arcam AVR20, Oppo UDP-203 4K Blu-ray player, Sony XBR70x850B 4k, Polk Audio Legend L800 with height modules, L400 Center Channel Polk audio AB800 "in-wall" surrounds. Marantz MM7025 stereo amp. Simaudio Moon 680d DSD

    “When once a Republic is corrupted, there is no possibility of remedying any of the growing evils but by removing the corruption and restoring its lost principles; every other correction is either useless or a new evil.”— Thomas Jefferson
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  • FTGV
    FTGV Posts: 3,649
    Texas42 wrote: »
    I have the Emo for some other speakers I have that are somewhat difficult to drive (Infinity Kappa 9s). I also have an Emo CMX2 Precision AC Line Restoration & Common Mode Filter System. This is more for eliminating DC offset and line noise though.

    Those Kappa 9's present a nasty load.
    Your using the line filter with the amp?I would think that would restrict it's current capability somewhat.
    As for mono block's some can have their negative speaker terminals strapped together to make them common ground.It all depends on how their output stages are configured.
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  • Texas42
    Texas42 Posts: 404
    I have a lot of line noise in my house which becomes audible only when I use a very high current amp (like the XPR2). The XPR2 also requires a 20 amp circuit. The line filter makes this amp dead quiet after trying quite a few other remedies.
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  • nooshinjohn
    nooshinjohn Posts: 25,415
    Filtering out noise is not the problem, compatibility is. This amp will fry your speakers, or they will fry the amp, or both. You NEED common ground stereo amplification.
    The Gear... Carver "Statement" Mono-blocks, Mcintosh C2300 Arcam AVR20, Oppo UDP-203 4K Blu-ray player, Sony XBR70x850B 4k, Polk Audio Legend L800 with height modules, L400 Center Channel Polk audio AB800 "in-wall" surrounds. Marantz MM7025 stereo amp. Simaudio Moon 680d DSD

    “When once a Republic is corrupted, there is no possibility of remedying any of the growing evils but by removing the corruption and restoring its lost principles; every other correction is either useless or a new evil.”— Thomas Jefferson
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  • Texas42
    Texas42 Posts: 404
    I think I'll be able to use an Adcom 5400 with the Polks. That should have both sufficient power and common ground.
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  • Schurkey
    Schurkey Posts: 2,101
    You'll need a jumper wire.
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  • Texas42
    Texas42 Posts: 404
    Could you elaborate? A jumper wire for what?
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  • heiney9
    heiney9 Posts: 25,165
    Texas42 wrote: »
    I have a lot of line noise in my house which becomes audible only when I use a very high current amp (like the XPR2). The XPR2 also requires a 20 amp circuit. The line filter makes this amp dead quiet after trying quite a few other remedies.

    A higher quality amp won't have audible line noise.
    "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!
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  • heiney9
    heiney9 Posts: 25,165
    edited July 2016
    Texas42 wrote: »
    Could you elaborate? A jumper wire for what?

    The Adcom 5400 is NOT common ground. For that amp you can tie (using thick gauge wire) the two negative speaker outputs together (at the amp) to create a common ground. Use a short run of high quality stranded 10 or 12 gauge wire and connect both NEGATIVE terminals to each end BEFORE you hook up the speakers.

    H9

    P.s. NOTE: you can't do this with every non-common ground amp.
    "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!
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  • F1nut
    F1nut Posts: 50,548
    I have a lot of line noise in my house which becomes audible only when I use a very high current amp

    That makes no sense.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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