KEF Q150 (Passive) Bookshelf Speakers (Black) (Pair) $600 Delivered @ Excel Hi-Fi

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thebadmachine on 09/10/2019 - 15:38 excelhifi.com.au (574 clicks)
Last edited 09/10/2019 - 18:58 by 1 other user

Cheaper than the last deal which was $673.37 Delivered.
Currently $715 Delivered @ Addictedtoaudio.

Shipping costs may vary depending on location. I put in Sydney and shipping was free.
Shipping insurance is available at extra cost.

Note: Please read the shipping information provided on the website, looks like they may use courier depending on the product, in which case you will need to sign on arrival.

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Q150 BOOKSHELF SPEAKER

The remarkable Q Series bookshelf speakers excel when space is limited. Featuring the signature KEF Uni-Q driver array with Computational Fluid Dynamics (CFD) port design, the Q150s deliver detailed natural sound with high clarity and tight bass.

"SIT ANYWHERE" UNI-Q SOUND
At the heart of the evolved Q Series is the Uni-Q driver array. The signature innovation places the tweeter in the acoustic centre of the midrange and bass cone, bringing the acoustic ideal of a single point source closer than ever to realisation. The result is a more detailed, accurate three-dimensional sound image, which is dispersed more evenly throughout the room than is possible with any conventional speaker. Uni-Q's ultra-wide dispersion is further enhanced through KEF's 'tangerine' waveguide over the tweeter dome.

NEW SYSTEM DESIGN
To optimise the high resolution purity of the Q Series bookshelf speakers, the Uni-Q driver is repositioned to the center of the cabinet to reduce unwanted internal resonance and adding refinement to sonic clarity and detail. With the addition of the damped tweeter loading tube providing a gentle termination of sound produced from the back of the tweeter, lower treble performance is improved dramatically and a new low-distortion inductor on the crossover provides cleaner bass.

CFD-DESIGNED PORT
Featuring a Computational Fluid Dynamics (CFD) port design with the port repositioned to the rear of the speaker, clarity is improved by reducing the audibility of the midrange leakage through the port.

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Specifications:

Dimensions ( H x W x D): 300 x 180 x 272 mm (11.8 x 7.1 x 10.7 in.)
Weight: 5.9 kg (13.0lb)
Design: 2-way bass reflex
Drive Units: 130mm aluminum Uni-Q 25mm vented aluminum dome HF
Crossover Frequencies: 2.5kHz
Sensitivity (2.83V/1m): 86 dB
Maximum Output (SPL): 107 dB
Impedance: 8 Ohms
Amplifier Requirements: 10 - 100W
Frequency Response (±3dB): 49Hz - 40kHz

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excelhifi.com.au

• 

  thebadmachine on 09/10/2019 - 15:48

  Also please take the recommended power requirements with a grain of salt.
  Typically KEF’s require high-power amplifiers for optimal performance, even when listening at low-volume levels.

  • 

    scuderiarmani on 09/10/2019 - 17:16

    +1

    No they don't? Not the Q series anyway….

    I've run these off yumcha amps and they've been very loud.

    Higher end yeah….

    • 

      thebadmachine on 09/10/2019 - 17:21

      Apparently the KEF Uni-Q driver series are quite dependant on being fed a decent current (even the entry level Q100 all the way up to LS50), requiring the amplifier to have a decently powerful power-supply.
      From what I have heard it is less about ‘overall volume’ and more about detail & overall extension.
      You should get a far superior experience pairing the Uni-Q driver speakers with a solid powerful amplifier.

      Whether you can hear this is another story altogether, but I suggest you try it out you may be surprised.

      • 

        scuderiarmani on 09/10/2019 - 17:24

        Depends on use case. On a desk, in a bedroom, these can make ample noise from a quality 10wrms amp. In a living room, a receiver wouldn't hurt.

        Floorstanders are often more efficient though.

        • 

          thebadmachine on 09/10/2019 - 17:28

          @scuderiarmani: Yes again ’loudness’ / volume is achievable, with these KEF series however the potential sound quality is quite dependant on the amplification.
          Some speakers are less dependant on the current etc, and some are more dependant on warm or cold sounding equipment.
          The KEF’s apparently are quite flexible (less picky) in this warm/cold department, however they have been reported to require decent current to let them achieve their true potential.

          • 

            scuderiarmani on 09/10/2019 - 17:34

            @thebadmachine: If it meant spending $500 extra on an amp, I'd rather put that money towards their higher end speakers. I think entry level gear often gets out matched.

            • 

              thebadmachine on 09/10/2019 - 17:45

              @scuderiarmani: While I also think this is true with audio equipment, that you should spend more on the final-stage (headphones / speakers) than the rest of the chain.
              The KEF series are one of the odd-ones which benefit from an expensive front-end (amplifier).
              It is possible they have tried to make a product appealing to both Consumer (Enthusiast) & Professional Hi-Fi markets. So they are able to be driven with a cheaper digital amplifier, but also able to benefit from more High-end equipment.

              I agree that the Q150 is closer to entry-level.
              I would prefer the R100 which is a more laid-back (and to some superior) version of the LS50.

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  gilly24 on 09/10/2019 - 16:37

  Is this price per pair or each? A few things indicate it's each, but having two in the image and a plural in the product name is a bit confusing.

  • 

    thebadmachine on 09/10/2019 - 16:56

    Yes it is for a pair. As far as I know you only get ‘single unit’ prices and packaging in Pro-Audio & the top-end HiFi products.
    Previous deal which was close in price was also for a pair.

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  crazyj on 09/10/2019 - 16:45

  Can anyone recommend some bookshelf speaker stands? Preferably something with an bracket which would fit to rear of speakers. I have Polk, but this applies to any bookshelf speakers.

  • 

    thebadmachine on 09/10/2019 - 17:00

    +1

    something with an bracket which would fit to rear of speakers.

    Most speaker stands are designed to have speakers sit on top of them.
    If you are looking for ones which have a bracket that fits to the rear of the speaker, you will likely be looking for OEM products made by the speaker brand which specifically fit your speakers.

    I posted a deal on some Dynaudio stands recently.
    Here are some stands on sale (which I doubt can hold a candle to the Dynaudio), but I think they would be ok for a enthusiast. As always please check the measurements of both the stands and your speakers before purchasing.
    System Audio FS4 Stands (Pair) ($199)

    FS4 Picture / Measurements

    Q Acoustics Concept 20 Stands (Pair) ($299)

    Barely any info online on the System Audio FS4 (you can just about make out some measurement in the picture I linked).
    And the Q Acoustics Concept 20 Stands are made of MDF & Glass with 3 spikes as feet. From the pictures it looks as if the column is U-shaped (when looking from above) so filling with sand may be an issue.

    • 

      justtoreply on 09/10/2019 - 17:12

      +1

      Great info.

      Ultimately though, for many of us, speakers sitting on stands just isn't kid friendly.

      • 

        thebadmachine on 09/10/2019 - 17:13

        Yes and also stands can take up more floor-space than you think, which can end up limiting your placement options especially in a smaller room.
        I myself passed on stands since the room my speakers are in is on the small side.

      • 

        scuderiarmani on 09/10/2019 - 17:17

        I wall mounted my bookshelf speakers for that very reason.

        • 

          crazyj on 10/10/2019 - 09:35

          @scuderiarmani: yes, I think I might end up wall-mounting too… Thanks heaps for info!!

      • 

        blairz1 on 10/10/2019 - 09:38

        +1

        Having no kids is the best kind of kid friendly.

• 

  alvian on 09/10/2019 - 19:00

  Computational Fluid Dynamics (CFD) port design

  I don't understand why KEF is using FD to model the port. Air and sound pressure waves are compressible, so FD models don't work.

  • 

    thebadmachine on 09/10/2019 - 19:05

    Maybe they made a bad decision somewhere along-the-line so they just said ‘slap-it-on there it’ll work’.
    Kind of reminds me of this clip I came across recently (watch till the end).

    • 

      alvian on 09/10/2019 - 19:47

      +2

      I found the answer. If the variations in temperature and pressure are small such that the mass density of the medium is unchanged (and modelling loudspeakers fit into this category), air can be approximated by an incompressible fluid. When you input the parameters for air into a CFD solver, the numbers agree quite well with experiments, well at least for a muffler.

      Learned something new today, so it is a good day.

      • 

        thebadmachine on 09/10/2019 - 20:02

        A bit over my head but I get the general idea I think.
        So the fluid dynamics of air in extreme cases, can be scaled down to ‘fart dynamic’ levels and improvements & optimisations can still be made.

        • 

          alvian on 09/10/2019 - 20:05

          @thebadmachine: In non-extreme cases. Quite boring as you simply plug the numbers into a prepackaged solver and out come the result. The fun starts in extreme cases. MathNerd would've been excited.

          • 

            thebadmachine on 09/10/2019 - 20:11

            @alvian: Yep got it.