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  1. #1

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    Default Need some new speakers

    I recently purchased a new integrated amplifier. It's a hybrid tube and solid state model. See link below.

    http://www.audioadvisor.com/prodinfo.asp?number=QIA3

    I just found out that one pair of speakers that I own are not compatible with this amplifier. See link below.

    http://www.castle.uk.com/ClassicSeri...S/Default.aspx

    According to a friend (broadcast engineer) this particular design is well suited to solid state amps but not tube type. This is his response to my inquiry:

    "The problem isn't speaker cables, it's the amp's damping factor. This is one area where a solid state amp has the advantage over a tube amp. I see the Castle speakers are ported; I'm guessing the Mirage ones aren't. The damping factor puts the brakes on the cone excursion and a sealed box does the same thing."

    I have some Mirage OM 10 speakers that sound great with this. But I am planning to purchase a second A3 and build another system for another room in the house. Thus, I need to find a second set of speakers that will work properly with the Qinpu amp.

    Can anyone recommend any Polk speakers that will be compatible with this kind of tube amplifier? I prefer a neutral sounding speaker (not artificially bright like Klipsch) that won't serve up a lot of listener fatigue. I have heard that Polk makes some warm sound speakers and so I am hoping that I can find several models that might work with this amp.

    Any suggestions will be appreciated!

  2. #2

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    I'd definitely check out the Lsi or Lsim line depending on your budget.
    Theater Room: Pioneer Elite SC-35, RTi12's, Csi5, Fxi5's, Fxi3's, ED A5-350 sub, Optoma HD20, 92'' Elite Screen, Xbox One, APC H15, MIT Exp 2 SC's, Pepster PC's

    Living Room: Martin Logan EM ESL's, Peachtree Audio iNova, MIT AVT2 SC's & IC's, Pepster PC, Sharp Aquos 60'', Sony BDP S-790, Airport Express

    Bedroom: Panasonic AX200U projector, 110" screen

    Outdoor: Polk Atrium 5's, Yamaha Rxv371

  3. #3

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    Would not run polk towers on that integrated amp

    plus I am not buying into his question...looks like a product plug
    Home Theater:Samsung8000-55LED,Pioneer SC35, Pioneer DV-79AVi, Sunfire TGA7201, LSi25, LCi RTSc, LC80i
    2chnl system:Melody 101 tube pre, Pass XA30.5 amp, Usher MD2 speakers, W4S Dac, MG Audio Planus2 speaker cables
    Office rig: Modwright KWI-200 Integrated, Dynaudio C1-II Signatures

  4. #4

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    This is NO PRODUCT PLUG. I provided these links to help the uninitiated to learn more about the amp that I am using and formerly the speakers I had been using.

    Thanks for the first suggestion. I will research these. Hopefully Polk offers a money back guarantee. If I purchase a set of speakers I will know within a matter of hours (prior to the break in) whether or not they will work with this amp.

  5. #5

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    txcoastal1. BTW. My Mirage OM 10's are a tower speaker and they not only sound great I can't even turn up the volume past about halfway on the amp before the sound gets too loud. A sensitive speaker with at least 90db will easily drive this amp regardless of whether or not is a bookshelf or tower speaker.

  6. #6

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    OK will please read the specs below and do the math...and the LSi line are 4ohm loads even more difficult to drive...welocme to Club Polk

    Integrated Specs: Output Power: 2 x 8.5 W (8 ohms RMS)

    The Conway 3 specs:
    Sensitivity
    91dB for 1w at 1m
    Amplifier Requirements
    25-175 watts

    LSiM 705 tower specs:
    Nominal Impedance 8 ohms
    Efficiency 88 dB
    recommended: 20-250 watts per channel

    LSiM 703 bookshelf specs:
    Nominal Impedance 8 ohms
    Efficiency 88 dB
    Home Theater:Samsung8000-55LED,Pioneer SC35, Pioneer DV-79AVi, Sunfire TGA7201, LSi25, LCi RTSc, LC80i
    2chnl system:Melody 101 tube pre, Pass XA30.5 amp, Usher MD2 speakers, W4S Dac, MG Audio Planus2 speaker cables
    Office rig: Modwright KWI-200 Integrated, Dynaudio C1-II Signatures

  7. #7

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    I have seen the 705's run beautifully on a Unison 12watt single ended tube amp and awfully on a 35watt integrated tube amp...I have alot of experience with the LSi/LSiM line really don't recommend that 8-watter for the value...just my opinion
    Home Theater:Samsung8000-55LED,Pioneer SC35, Pioneer DV-79AVi, Sunfire TGA7201, LSi25, LCi RTSc, LC80i
    2chnl system:Melody 101 tube pre, Pass XA30.5 amp, Usher MD2 speakers, W4S Dac, MG Audio Planus2 speaker cables
    Office rig: Modwright KWI-200 Integrated, Dynaudio C1-II Signatures

  8. #8

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    Quote Originally Posted by txcoastal1 View Post
    I have seen the 705's run beautifully on a Unison 12watt single ended tube amp and awfully on a 35watt integrated tube amp...I have alot of experience with the LSi/LSiM line really don't recommend that 8-watter for the value...just my opinion
    Thanks. What is a 705?

  9. #9

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    Quote Originally Posted by Will62 View Post
    Thanks. What is a 705?
    http://www.polkaudio.com/products/st.../floorstanding


    The 705's kicked butt on this one:
    http://en.unisonresearch.com/3146/simply-italy/

    The 705's not so much on this one:
    http://www.ravenaudio.com/cgi-bin/ravenaudio/00108.html

    So the 8-watter will be a gamble
    Last edited by txcoastal1; 03-24-2013 at 11:13 PM.
    Home Theater:Samsung8000-55LED,Pioneer SC35, Pioneer DV-79AVi, Sunfire TGA7201, LSi25, LCi RTSc, LC80i
    2chnl system:Melody 101 tube pre, Pass XA30.5 amp, Usher MD2 speakers, W4S Dac, MG Audio Planus2 speaker cables
    Office rig: Modwright KWI-200 Integrated, Dynaudio C1-II Signatures

  10. #10

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    Any of these: http://www.sonist.com/

    They're designed to be powered by low powered tube amps and sound wonderful doing so.
    "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche

  11. #11

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    Quote Originally Posted by Will62 View Post
    Thanks. What is a 705?
    The bottom half of a 703

    Galveston oh Galveston, I still hear your seawinds blowing, I still see her dark eyes glowing, She was 21 when I left Galveston
    Draggn' knee is exhilarating, 150mph wheel standers are pretty cool too


    Home Theater-7.2
    Display-SamsungPN64D8000 | Receiver-Onkyo TX-NR807 | Source-OPPOBDP-103 | Amplifiers-Emotiva; XPA-2 x2, XPA-3 | Speakers: PolkAudio; mains-RTiA9, rears-RTiA9, center-CSiA6, surrounds-FXiA6 | Sub-Epik Empire x 2 | Interconnects-Emotiva


    Cans
    Grado RS2i

    2 Ch Rig
    First purchase will be; a pair of ? but I'd love a pair of SDA SRS

  12. #12

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    Oops, my bad, the 703 is the bottom half of a 707
    Draggn' knee is exhilarating, 150mph wheel standers are pretty cool too


    Home Theater-7.2
    Display-SamsungPN64D8000 | Receiver-Onkyo TX-NR807 | Source-OPPOBDP-103 | Amplifiers-Emotiva; XPA-2 x2, XPA-3 | Speakers: PolkAudio; mains-RTiA9, rears-RTiA9, center-CSiA6, surrounds-FXiA6 | Sub-Epik Empire x 2 | Interconnects-Emotiva


    Cans
    Grado RS2i

    2 Ch Rig
    First purchase will be; a pair of ? but I'd love a pair of SDA SRS

  13. #13

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    Quote Originally Posted by Geoff4rfc View Post
    Oops, my bad, the 703 is the bottom half of a 707
    u talking about her or the speakers bottom half
    Home Theater:Samsung8000-55LED,Pioneer SC35, Pioneer DV-79AVi, Sunfire TGA7201, LSi25, LCi RTSc, LC80i
    2chnl system:Melody 101 tube pre, Pass XA30.5 amp, Usher MD2 speakers, W4S Dac, MG Audio Planus2 speaker cables
    Office rig: Modwright KWI-200 Integrated, Dynaudio C1-II Signatures

  14. #14

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    Quote Originally Posted by Face View Post
    Any of these: http://www.sonist.com/

    They're designed to be powered by low powered tube amps and sound wonderful doing so.
    Wish I had 2 grand to spend at this time but I don't. Looks like a great speaker though.

  15. #15

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    Quote Originally Posted by txcoastal1 View Post
    http://www.polkaudio.com/products/st.../floorstanding


    The 705's kicked butt on this one:
    http://en.unisonresearch.com/3146/simply-italy/

    The 705's not so much on this one:
    http://www.ravenaudio.com/cgi-bin/ravenaudio/00108.html

    So the 8-watter will be a gamble
    I'll have to find some cheaper speakers this time around. I don't want to drop a couple grand for something only to find it doesn't sound right with the amp.

  16. #16

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    with that 8 watt amp i think you are going to need speakers in the upper 90+ db range with high impedence (8+) ohm.
    i think you are buying wrong. get the speaker first as speakers have the most effect on sound. you are limiting your choice of speakers to the amp and the limited choice may not be to your liking soundwise and now you are making your options even less by your budget.
    GET THE SPEAKERS FIRST.
    Last edited by marvda1; 03-25-2013 at 09:49 AM.
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    http://forum.audiogon.com/cgi-bin/fr...pin&1162599347 Freelance reviewer for StereoMojo

  17. #17

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    Quote Originally Posted by marvda1 View Post
    with that 8 watt amp i think you are going to need speakers in the upper 90+ db range with high impedence (8+) ohm.
    It is an 8 ohm amp and that would be ideal. But I've found that even my Mirage OM 10 towers sound great with it even with a 90db sensitivity.

    I read all the reviews on Amazon for the A3 and the MK6000 amp and several people report success with Polk speakers including some models with only an 88db level of sensitivity in their speakers. Most are bookshelf models. One guy is using a Monitor 70 and said they sound great with this amp.

    I decided to write Polk Customer Service to see if they can offer some recommendations.

  18. #18

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    That amp wouldn't even drive my headphones. I'd look for a new amp as you're really limiting yourself.
    "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche

  19. #19

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    Quote Originally Posted by Face View Post
    That amp wouldn't even drive my headphones. I'd look for a new amp as you're really limiting yourself.
    Some headphones such as Grado don't work well with these amps. But there are speakers that do. Again, my Mirage OM 10's sound great on this amp and it has plenty of power. And the audio quality blows away the sound I had on my Cambridge Audio A 300 amp with the OM 10's. Unfortunately finding a similar speaker in my price range is difficult now. The Mirage OMD 5 would probably work fine but it is a bookshelf speaker and likely will require a subterranean woofer to sound the way I'd like it. Tower speakers with the Omnipolar design by Mirage now start at over 2 grand. Trying to find a more cost effective solution.

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