Comparison of A9's vs. LSIM707's anyone?

arcmanarcman Posts: 5
I hate the boxy cabs on my Rti12's. (same guts as A9's) I'm now thinking of getting a pair of the 707's, which I think are a much better looking speaker. My wife thinks so too.

Since the only dealer Polk said had these on the floor was in NYC, and being 1,000 miles away, I'm not going to get to demo them. That's a chance I'll take. I'm assuming these will be a more accurate speaker but I am concerned about how loud these can go compared to the A9's. I currently have a NAD C370 and a C270 running mono to each channel, which more than fills the need for volume.

I also have a pair of Lsi9's, a very nice sounding speaker, that I really like but the listening level at the same volume settings as the 12's is night and day.

Wondering if anyone here has compared the Rti12/A9's to the 707's? Does being down 88db to 90db efficiency make that much of a difference in loudness?

Appreciate any info.

Thanks.

Comments

  • mlistens03mlistens03 Posts: 1,889
    arcman wrote: »
    I hate the boxy cabs on my Rti12's. (same guts as A9's) I'm now thinking of getting a pair of the 707's, which I think are a much better looking speaker. My wife thinks so too.

    Since the only dealer Polk said had these on the floor was in NYC, and being 1,000 miles away, I'm not going to get to demo them. That's a chance I'll take. I'm assuming these will be a more accurate speaker but I am concerned about how loud these can go compared to the A9's. I currently have a NAD C370 and a C270 running mono to each channel, which more than fills the need for volume.

    I also have a pair of Lsi9's, a very nice sounding speaker, that I really like but the listening level at the same volume settings as the 12's is night and day.

    Wondering if anyone here has compared the Rti12/A9's to the 707's? Does being down 88db to 90db efficiency make that much of a difference in loudness?

    Appreciate any info.

    Thanks.

    It will not. Another thing is that the LSiMs are much easier to drive than you RTI12s. One last thing, you said you like your LSis better, the LSiMs are many times more accurate/more fun/better than the LSi series.
    Micah
    Not Tom, or Trey, or Jim
    Main setup:
    Speakers are one of three, Mission Freedom 770 IV’s, Polk LSi25’s, or Polk SDA-CRS (stock XO, SL2000’s, Blade/Blade model). Electronics are as follows: for the LSi’s and SDA’s, a Technics SU-v75 acting as a phono preamp, into a Yamaha RX-v665, into a Crown XLi800 power amplifier. For the Missions, I have a Lafayette LR-1100. Turntable is a Technics SL-3200, with a Shure M97xE. Cables are generic/soon to be replaced garbage.
    An old post I found on AK, from 2013.
    I've always thought the goal of high end audio was not to have your neighbors bang on the wall and say, 'Turn that darn music down' but to have your neighbors bang on the wall and say, 'Tell your friends to go home and you can practice later this week'.
  • rpf65rpf65 Posts: 1,738
    I went from RTI A5’s to LSI M705’s, and found the 705’s much better speakers for music.

    When I had the A5’s, I used to listen to them around the 65-70dB range. They sounded fairly loud, but not excessively so.

    Switched to the 705’s, and one evening I had to go outside for something or other, and left the cd playing. I was able to hear the music playing fairly far away from the door. Grabbed the spl meter, and found the music was playing at around 85 dB.

    I didn’t realize the volume was that loud, thought I was playing them about as loud as the A5’s. Few days later, the neighbor’s kid commented that he heard my music turned up again, so I guess this was going on for a while.

    Guess what I’m trying to say is with the different sound signature you may actually play the 707’s measurably louder than your 12’s without realizing it.

    Wouldn’t really worry about efficiency ratings too much. Better to have better sound than a better measurement.
  • tonybtonyb Posts: 29,577
    I would take those Nads out of mono mode. The 12's require current and can dip well below 8 ohms. Running the Nads in mono is only suggested for an 8 ohm speaker, which most amps in mono don't like anything below 8 ohms. Your probably sacrificing some sound quality for loudness.

    That said, the LSIM series you'll find much more pleasing for music than the RTI series.....but even then I'd still just use the bigger Nad and not run mono.
    HT SYSTEM-
    Pioneer elite vhx 21
    Sony 4k BRP
    Tad 803 bookies
    Polk 500 surrounds
    Polk s35 center
    SVS SB-2000
    Sonos

    Music-

    Joule la-100 pre
    B&k 1403 amp
    Cary xciter dac
    Cullen modded Sonos
    ERA D5 bookies

    Cables-
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  • adabroadabro Posts: 190
    Can't answer your specific question, but I went from the A9's to the 705'sand loved the change. I found the 705's much 'nicer' for music.
  • mrlorenmrloren Posts: 1,440
    I went from RTi8 to signature S60, Music improvement is outstanding. RTi line is geared more for Home Theater than music.

    If you're getting a deal on the LSiM then go for it.
    When I was a kid my parents told me to turn it down. Now I'm an adult and my kids tell me to turn it down.

    Family Room:
    Samsung UN60H,
    Denon AVR-X4400H, Emotiva BasX-A300
    Oppo BDP-93,Sony UBP-X800BM, Sony DVP-NS3100ES, WD Live HUB.
    Main: Polk Signature S60
    Center: Polk CSi-A6
    Front High/Rear High In-Ceiling Polk 80F/X RT
    Surrounds: Polk T15
    Sub: HSU VTF3-MK5

    Bed Room;
    Sony KDF-E42A10,
    Marantz SR5010, BDP-S270
    Main: Polk Signature S20
    Center: Polk Signature S35
    Rear: Polk R15
    Sub: HSU STF-2

    Working Warehouse;
    Sony 2100ES
    Polk RTi4 about 15' up the wall
    Old sony 12" Sub
    Mini tower PC with 400GB of music
  • F1nutF1nut Posts: 40,222
    I also have a pair of Lsi9's, a very nice sounding speaker, that I really like but the listening level at the same volume settings as the 12's is night and day.

    Well yeah! One is a 4 ohm speaker while the other is an 8 ohm speaker.

    Looks wise, the RTiA series look much better than the LSiM and the cherry version has real cherry veneer. Sound wise for music the LSiM is much better.
    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."


  • arcmanarcman Posts: 5
    tonyb,

    Other than when these amps had some loosened solder joints (a common problem with them), I've never heard any signs of distortion whatsoever, and I'm talking at some seriously high volumes. With two subs, I need no more volume. A little more accuracy might be nice but I don't want to trade it off for loudness.

    The 707's are rated at 300w vs. 500 for the 12's. Not knowing the ins and outs of impedances and loads, I'm a bit concerned cranking up a 300 watt amp into them will put the package into the fatigue zone.

    I love the Rti12's. Again, I'm just hoping to get a smidge more accurate sound, similar volume levels and a better looking piece of furniture.

    The integrated C370 in bridged mono mode is rated 300w into a 8 ohm load. The C270 is the power amp version. The Rti12's are 8 ohm's. I'm curious why you think there's an issue here?

    Here's something copied from NAD's **** sheet about their circuitry...

    Impedance Sensing Circuit (ISC):

    The C370 also benefits from NAD's proprietary Impedance Sensing Circuit
    (ISC) topology, now well established and used in many NAD models including
    the highly reviewed C320 and C340.

    The ISC topology allows the C370 to deliver maximum performance under
    virtually any circumstance, independent of the loudspeakers it is driving. The
    circuitry automatically senses the impedance characteristics of the loudspeaker and will then adjust its power supply settings to best cope with that specific
    load. With ISC topology, the relationship of voltage to current is kept at an
    ideal proportion, eliminating the current limiting distortion common in lesser
    designs. This also gives it an unusual characteristic compared to traditional
    amplifiers when measuring its continuous output power; the RMS output power remains the same at 120 Watts with either an eight or a four ohms
    load. This is not unusual for NAD however.
    NAD takes a stance to the mindless "brochure power" approach which doesn't give a realistic indication of an amplifier's true capabilities. Instead, the
    ISC topology is a practical approach to enable an amplifier to easily deal with
    musical dynamics and difficult speaker loads. More meaningful in the real
    world are the C370's dynamic capabilities; up to 450 Watts into 2 ohms and
    up to 70 amps current capability into 1 ohm!
  • Mikey081057Mikey081057 Posts: 5,442
    I have had and heard most of the Polk line and to me the best sounding and balanced of the bunch was the 705's. The 707's were a bit boomy/bloated for my taste. Save some $$$ and put it towards a nice svs sub to go with the 705's. They are ok for music and ok for HT. If music is your bag then there are many better options out there than any of the Polks. The (VR3 modded) Lsi 9's were my second favorite pair of Polks.
    HT:Polk LSiM 706 LSiM 705's VR3 LSiM 703's LSiM 702's| Marantz AV7702 | Sunfire TGA-7401 | Oppo BDP-103D | Sony PS4 | Directv Genie HD DVR | Samsung 64" Plasma | SVS PB13 Ultra | MIT EXP 2's (Fronts & Center)

    ManCave: Parasound Halo A21 | Parsound Halo A52+ | Marantz AV7004 AV PrePro | Usher Dancer Mini-x DMD's | Usher BE-616 Center | SVS Ultra Surrounds | SVS SB4000 Sub |Oppo UDP 203 | MIT Shotgun S3's | Marantz SA8004 SACD | Music Hall MMF 5.3se TT w/ Soundsmith Carmen | Mytek Brooklyn DAC+ | HP Elite Slice PC | Samsung 50" SUHD TV | Sony PS4 Pro

    Patio Polk Atrium 8's |Marantz 2252B |

    Office Bluesound Node2 | Polk SDA SRS 2.3 | Marantz 2385 |

    Bedroom Peactree Nova 125SE | Focal 905's | Bluesound Node | SVS SB2000 Sub

    Garage Yamaha R-N303BL | Polk Monitor 5B's

    Closet Yamaha M80 | 2 Polk MP2K subs| Yaqin MC100B with Shuguang Treasures KT 88's & CV181Z's | Tesla E83CC's |
  • F1nutF1nut Posts: 40,222
    The 707's are rated at 300w vs. 500 for the 12's. Not knowing the ins and outs of impedances and loads, I'm a bit concerned cranking up a 300 watt amp into them will put the package into the fatigue zone.

    Meaningless spec.
    The integrated C370 in bridged mono mode is rated 300w into a 8 ohm load. The C270 is the power amp version. The Rti12's are 8 ohm's. I'm curious why you think there's an issue here?

    Bridging causes the noise floor to rise.



    I agree with Mikey, the 705's are the best of that lot.
    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."


  • jeremymarcinkojeremymarcinko Posts: 3,165
    edited June 30
    I have the RTI12s in the HT and LSM705s in the 2ch. Both are great speakers but the 705’s easily bring the most enjoyment musically, even if they’re a little less accurate. The 12’s accuracy is spot on, given a decent room, but will take a lot of current to be musical given its ruler flat frequency response. The 705s do a fantastic job with a whole lot less.
    Oh, Listen here mister. We got no way of understandin' this world. But we got as much sense of this bird flyin in the sky. Now there is a lot that bird don't know, but it don't change the fact that the world is happening to him all the same. What I am tryin to say is, is that the course of your life, well its changing, and you don't even see it- Forest Bondurant
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