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  1. #1

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    Default Understanding RTi(A) line crossover points

    This question may seem redundant to some but I am try to understand something. If you use a entry level AVR lets say a pioneer vsx1122, or a yammy v667. You have a sub, this will be a HT setup so you plan on using the recommended crossover point of 80hz. What would be the advantage in the A7 or A9 over the A5. Would not the 80hz crossover point negate and advantage the larger speakers would offer.

    I fully understand the benefit if your running full range with an amp but strictly in these circumstances what benefit would you gain. I see people asking similar setup questions and I never understood why you would spend so much more on large speakers just to have them cut off where the differences, to me at least would show.

    enlighten me fellow polkies
    HT Rig Sharp LC-52LE810|Panasonic BDP210|Pioneer Elite VSX-32|Polk Audio RTiA5 Cherry|Polk Audio CsiA6 Cherry|Polk Audio T-15|DSW Pro 600, Micro Pro4000 powered with a Crown XLS1000

    2Channel Rig Polk Audio LSi9 Cherry| Carver C-1|Carver M1.0t|Dual 1257|Acer A500|Pioneer SW8-MKII X2

  2. #2

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    I run my Rti12's crossed over at 80hz and they sound a lot better than my Rti8's ever did. The woofers is the 12 play from 125hz to 80hz which isn't a huge range but they still have a ton of sound coming out of them. The Rti12's also have better crossover materials and a much sweeter sounding midrange, at least to me. When I do listen to music on them I use Pure Direct mode which runs them full range, so I do get some use out of them for that as well.
    Theater Room: Pioneer Elite SC-35, RTi12's, Csi5, Fxi5's, Fxi3's, ED A5-350 sub, Optoma HD20, 92'' Elite Screen, Sony BDPS790, Xbox One, APC H15, MIT Exp 2 SC's, Pepster PC's

    Living Room: Martin Logan ESL's, Peachtree Audio iNova, Zu Mission SC's & IC's, Pepster PC, Sharp Aquos 60'', AEX

    Bedroom: Panasonic AX200U projector, 110" screen

    Outdoor: Polk Atrium 5's, Yamaha Rxv371

  3. #3

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    As I understand, the cross over freq isn't so much a hard stop point as it is a roll off freq. In other words your mains, for instance,will still produce some of the sound below 80 Hz. It's just that is where the sub will start recieving the signal and producing most of the sound. At a certain the sub will take over all lower freq response.

    I may be wrong, and can expect being corrected very soon, but I'll continue. The A7's for instance have the advantage of being a 3 way speaker, and by design are able to handle the lower feqs better than the 2 way A5. So in theory, should produce a more seemless sound.

    Currently running A5's on entry level Yamaha, and am very happy with them.

  4. #4

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    As I understand, the cross over freq isn't so much a hard stop point as it is a roll off freq. In other words your mains, for instance,will still produce some of the sound below 80 Hz. It's just that is where the sub will start recieving the signal and producing most of the sound. At a certain the sub will take over all lower freq response.
    You got it.
    'Political Correctness'.........defined

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  5. #5

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    Ok. Now time to research three ways vs two ways.... Crossovers that is
    HT Rig Sharp LC-52LE810|Panasonic BDP210|Pioneer Elite VSX-32|Polk Audio RTiA5 Cherry|Polk Audio CsiA6 Cherry|Polk Audio T-15|DSW Pro 600, Micro Pro4000 powered with a Crown XLS1000

    2Channel Rig Polk Audio LSi9 Cherry| Carver C-1|Carver M1.0t|Dual 1257|Acer A500|Pioneer SW8-MKII X2

  6. #6

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    You also have more drivers covering less frequency range so they dont have to work has hard.
    AVR: Onkyo Tx-NR808
    Amplifier: Carver A-753x 250 watts x 3
    Fronts: Polk RTI A7 (modded by Trey VR3)
    Center: CSI A4 (modded by Trey VR3)
    Rear: FXI A4
    Sub: Polk DSW Pro 660wi
    TV: LG Infinia 50PX950 3D
    Speaker Cable: AudioQuest Type 8
    IC: AudioQuest Black Mamba II

  7. #7

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    Not hard to understand the difference between 2 and 3 ways. The 3 ways will give an overall better sound. That is that they will cover a more even freq response than a 2 way. For the most part, the higher freq will be fairly close, given the same mfg and series of speaker. The lower freq will always be a plus for the 3 way.

    When you go from 2 to 3 way, you simply need more power. You're now driving woofers as oppesed tojust mid-range. If you want a better sound stage, add more power and 3 way. Powered subs are great, if a 2 way can blend correctly, but need dialed in.

    I've always wondered, if powered correctly, how the A5 and A7 would compare in the mid range area? Did a side by side at Frys,not using the greatest of AVRs, and the A5's did sound better.

  8. #8

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    Much depends on speaker build and design. 2 way ,3 way, 5 way....doesn't matter really. I've heard single horn speakers that could put many multi-driver speakers to shame. A5's should have a better mid bass presentation, while the 7's a better lower end. Just depends on your situation and associated gear for what will fit your needs better.

  9. #9

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    Since the LSI9 is three way, would that explain why its so much more punchier then my a5's are? I had them both powered off the exact same setup and the lsi9s had so much more of a punch to them
    HT Rig Sharp LC-52LE810|Panasonic BDP210|Pioneer Elite VSX-32|Polk Audio RTiA5 Cherry|Polk Audio CsiA6 Cherry|Polk Audio T-15|DSW Pro 600, Micro Pro4000 powered with a Crown XLS1000

    2Channel Rig Polk Audio LSi9 Cherry| Carver C-1|Carver M1.0t|Dual 1257|Acer A500|Pioneer SW8-MKII X2

  10. #10

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    Quote Originally Posted by specd_out View Post
    Since the LSI9 is three way, would that explain why its so much more punchier then my a5's are? I had them both powered off the exact same setup and the lsi9s had so much more of a punch to them
    It's the power draw. Your A5's are pretty efficient and 8 ohm, the carver won't break a sweat running those, but the carver will rev it's engine with a more power demanding speaker.

  11. #11

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    Quote Originally Posted by specd_out View Post
    Since the LSI9 is three way, would that explain why its so much more punchier then my a5's are? I had them both powered off the exact same setup and the lsi9s had so much more of a punch to them
    The LSi 9's sound punchier because they pump up the mid-bass.
    '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 turd by the clean end."

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