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  1. #1

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    Lightbulb Mostly newb questions, but I just got Lsi9s/LsiC and could use some help.

    A few questions from a new Polk owner. I currently have what I assume is a relatively typical 5.1 setup for a HT enthusiast on a budget.
    • Onkyo 806
    • Lsi9 fronts
    • LsiC center
    • Two mostly-crappy in-ceiling rears which are good enough for now.
    • Semi-crappy 10 year old sub which I will replace someday soon.

    I thought the 806 would be enough to power the Lsi9's - and it tries, but doesn't really succeed. I need an amp. After browsing this forum and others I think I've decided to get the Emotiva XPA-5. Also, I have three other rooms in my house where speakers are installed in-ceiling. Presently we are only using one set of these via the 806's powered zone 2 feature (and my wife is complaining for me to get the other two sets working). Now for the questions:
    1. Should I hook all five of my speakers (even the crappy rears) up through the XPA-5 or just the Lsi's?
    2. If I leave my rears hooked up to the 806 and the others go through the amp will everything sound ok still? Will the 5 signals still sync properly? This is probably a dumb question but I'm assuming there will be no delay with the amp processed channels.
    3. How can I make the other three sets of room speakers work with this setup? I can leave one of them on the 806's powered zone 2 and will do so. I'm thinking that I can leave another hooked up to the front powered speakers outs on the 806. What about the third? What about buying some kind of "Off/Bedroom/Bathroom" toggle switch for the 2nd and 3rd pair?
    4. Since this is the first time I'll have this kind of setup, I'm curious about the sound processing modes on my 806. If I output in "Pure" mode on the 806 to the amp via the preouts, I'm assuming all the dolby/dts formats will be decoded first and sent to the amp without any additional processing added? What about modes like THX Cinema and all channel stereo? Any info or web resources you could point me to on this would be helpful.

    Thanks a ton for any help you can provide.

  2. #2

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    1. Up to you, either way would work just fine.

    2. Yes, they will sync properly.

    3. Can't really help you out with that one.

    4. The amp just amplifies the signal -- there is zero processing done in it. Whether you run in Pure or any of the other modes, all of the processing is being done in your 806, and then sent to the amp.
    Speakers: Polk LSi15
    Pre: Adcom GFP-750 with HT Bypass
    Amp: Pass Labs X-150
    CD/DVD Player: Classe CDP-10
    Interconnects: MIT Shortgun S3 Pro XLR
    Speaker cables: MIT MH-750 bi-wire
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  3. #3

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    Quote Originally Posted by Ducci View Post
    ...
    I thought the 806 would be enough to power the Lsi9's - and it tries, but doesn't really succeed. I need an amp.
    Definitely

    Quote Originally Posted by Ducci View Post
    ...[*]Should I hook all five of my speakers (even the crappy rears) up through the XPA-5 or just the Lsi's?
    Should be OK, although you could let the Onk do a little work and leave more available power for the LSi's. Try it both ways.

    Quote Originally Posted by Ducci View Post
    ...[*]If I leave my rears hooked up to the 806 and the others go through the amp will everything sound ok still? Will the 5 signals still sync properly? This is probably a dumb question but I'm assuming there will be no delay with the amp processed channels.
    Shouldn't be any delay, if there is you can adjust delay in the Onk.
    One thing you absolutely would need to do though is calibrate the speaker levels using Audyssey and/or an SPL meter to ensure they are all the same. The gain in the Onk and the XPA (I think its 29dB) are comparable so as you turn the volume up, the Onk amp output the XPA output will increase at the same rate/ratio.

    Quote Originally Posted by Ducci View Post
    ...[*]How can I make the other three sets of room speakers work with this setup? I can leave one of them on the 806's powered zone 2 and will do so. I'm thinking that I can leave another hooked up to the front powered speakers outs on the 806. What about the third? What about buying some kind of "Off/Bedroom/Bathroom" toggle switch for the 2nd and 3rd pair?
    You can get a speaker switch for Zone 2, or a small amp to handle the unamplified preouts from Zone 3.

    Quote Originally Posted by Ducci View Post
    ...
    If I output in "Pure" mode on the 806 to the amp via the preouts, I'm assuming all the dolby/dts formats will be decoded first and sent to the amp without any additional processing added? What about modes like THX Cinema and all channel stereo?
    I'm not 100% on this so consult the manual to be sure...I believe in Pure/direct mode you bypass most if not all processing in the AVR. All the processing has to have been done beforehand in an upstream device such as a BluRay player or PS3, etc.

    Welcome to Club Polk.
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    This post is a natural product. The slight variations in spelling and grammar enhance its individual character and beauty and in no way are to be considered flaws or defects.

    HT:Onkyo 805, Emotiva XPA-5, Mitsu 52" 1080p DLP / polkaudio RTi12, CSIa6, FXi3, uPro4K
    2-chnl : Pio DV-46AV (SACD), Dodd ELP, Emotiva XPA-1s, XPA-2, Odyssey Khartago, LSi9, SDA-SRS 2 , SB Duet, MSB & Monarchy DACs, Yamaha PX3 TT, SAE Tuner...
    Pool: Atrium 60's/45's

  4. #4

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    Thanks for the help guys. Just ordered the xpa5. Probably have more Q's after it arrives and I tinker, but this is a great start.

  5. #5

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    I've got something to add, and not only for Ducci but for the guru's here.

    The LSi's are 4ohm speakers, isn't it a bad idea to mix impedence/loads on any type of amp?

    The OP didn't state how many ohms the in-ceiling speakers were, I just wanted him to be safe with his setup. :D
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    Quote Originally Posted by heiney9 View Post
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  6. #6

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    You can mix and match with the xpa-5 no worries.
    Quote Originally Posted by kawizx9r View Post
    I've got something to add, and not only for Ducci but for the guru's here.

    The LSi's are 4ohm speakers, isn't it a bad idea to mix impedence/loads on any type of amp?

    The OP didn't state how many ohms the in-ceiling speakers were, I just wanted him to be safe with his setup. :D

  7. #7

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    Quote Originally Posted by Montoya View Post
    You can mix and match with the xpa-5 no worries.
    Alrighty, I just recall reading something about mixing loads as a big no no. Probably in regards to receivers, didn't know it'd be ok for amps....or for the xpa-5 at least.
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    Quote Originally Posted by heiney9 View Post
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  8. #8

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    Quote Originally Posted by Montoya View Post
    You can mix and match with the xpa-5 no worries.
    I agree, each amp channel is independent with the XPA series multichannel amps.
    They do share a common power supply.
    I have run 4 ohm LSi and 8 ohm RTi series many times for a long time.
    For my master bedroom system I use a XPA-3 to power two Polk LSi15's and the 8 ohm CSi5 as my center channel.

    Main HT/2 ch:
    Pioneer SC-07, BDP-05FD, Emotiva XPA-5 x 2, XPA-1 x 2,
    Polk Audio LSi25, RTi12 x 2, LSi15 x 4, LSiC x 2, PSW1000 x 4,

    MB HT/ 2 ch:
    LG 47LM5800, Pioneer SC-1523, BDP-23FD, Sony BDP-S790, Emotiva XPA-2, XPA-5,
    Polk Audio LSi25,15, CSi5, LSiFX, PSW505 x 4

    Listening Room 2 ch:
    McIntosh MC162, MC202, C15, C41, C42, MA6500, MA6900, MCD201
    Emotiva RSP-2, RPA-1, ERC-2
    Adcom GCD 750, GFP 750, GFA 5802
    Polk Audio LSi7,9, 15

  9. #9
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  10. #10

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    If you don't mind buying used, go to www.audiogon.com for Sunfire, Rotel, Parasound, Outlaw, B & K, Nad, Adcom.
    Sunfire TGP III PrePro, Sunfire Cinema Grand Signature 405wpc 5 ch. Amp, Rotel RCD-1072 CDP, Onkyo TA2600 Tape Deck, Pioneer Elite 47-A DVD, Sony 32" XBR TV, Polk RTA-8T Main Speakers, Boston VR-920 Center Channel, Boston PV-600 Subwoofer, Polk DSW 400 Subwoofer, Polk FXi-3 Surround Speakers

  11. #11

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    Quote Originally Posted by Bernal View Post
    Quote Originally Posted by cfrizz View Post
    If you don't mind buying used, go to www.audiogon.com for Sunfire, Rotel, Parasound, Outlaw, B & K, Nad, Adcom.
    Quote Originally Posted by Ducci View Post
    Thanks for the help guys. Just ordered the xpa5. Probably have more Q's after it arrives and I tinker, but this is a great start.
    XPA-5 on the way
    Video: LG 55LN5100/Samsung LNT4065F
    Receiver: HK AVR445
    Source: OPPO BDP-93
    HT: POLK SPEAKERS RTi6, FXi3, CSi5 - Sub SUB-1200
    2Ch system: MC2105, C-26, AR-XA, MR-80, AR-2A, AR9, BX-300

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