Denon 4806 & Lsi Series 4 ohm speakers

haveyouever
haveyouever Posts: 25
edited March 2006 in Electronics
I just received my Denon 4806 from an auction on Ebay with the intent of powering my Polk Lsi15, LsiC and LsiFX surround speakers but, I can't seem to turn up the volume with out the Denon tripping. I can power a Bose AM15 setup in my sons room with out a problem... your thoughts?
Post edited by haveyouever on
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  • Frank Z
    Frank Z Posts: 5,860
    edited February 2006
    The LSi series are very demanding and need plenty of good clean power. Although the Denon is a quality product, it's still a receiver with limited power and it generates a lot of heat. Have you made sure that you have adequate clearance around and above the receiver? I believe the manufacurer recommends 8" from the top. Do you have it in a cabinet with a glass door? Is there a switch for selecting the impedance of the speakers you are using?
    9/11 - WE WILL NEVER FORGET!! (<---<<click)
    2005-06 Club Polk Football Pool Champion!! :D
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  • bvette94
    bvette94 Posts: 356
    edited February 2006
    The 4806 is only a 6 and 8 ohm receiver. you will need a seperate amp to drive lsi speakers. chances are your sons bose speakers are 8 ohms. For what it is worth it cant hurt to double check your conections to make sure nothing is shorted.
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  • mantis
    mantis Posts: 17,204
    edited February 2006
    The Denon Avr4806 is designed to run 6-16 ohm speakers. the Lsi series are 4 ohm speakers. While you can use it but as soon as you crank it up, it will cut out as you already experienced. This is normal. Your asking more of the receiver then what it can do.
    You should resell it and look for a B&K avr507 s2 receiver. This receiver can and will power the Lsi series speaker as loud as your heart desires.It's rated at 185 watts into 4 ohm load all channels driven from 20hz to 20khz. This is what I used to power mine. B&K is great with Lsi speakers.

    If you like the avr4806's preamp section, add a 5 channel amp like a rotel RMb1075 or RMB1095. There cheaper then most other multichannel amps and will get the job done.This is not what I would do but it will work.

    Dan
    Dan
    My personal quest is to save to world of bad audio, one thread at a time.
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  • wingnut4772
    wingnut4772 Posts: 7,519
    edited February 2006
    Ditto.
    Sharp Elite 70
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  • haveyouever
    haveyouever Posts: 25
    edited February 2006
    Well... damn it... it failed the smoke test!!... got any suggestion on a good repair shop in Houston?
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  • haveyouever
    haveyouever Posts: 25
    edited February 2006
    It looks like some damage from shipment as well... a sharp blow above the right speaker connects I didn't even notice earlier probably didn't help matters!!
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  • haveyouever
    haveyouever Posts: 25
    edited February 2006
    Thanks Mantis!,
    I've got a B&K AVR507 S2 on order should arrive within the week!... the Denon 4806 is insured by UPS... wish me luck!!... thomas
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  • kmartin971
    kmartin971 Posts: 236
    edited February 2006
    You need an amp. I had the same issue with my Onkyo and added an Aragon amp. Everything is amazing now! Although my 803 is rated for 4 ohms and rarely shutdown at resonably high volumns. Certain peak moments while watching DVDs would cause it shut down.


    Of course these peak momnents are the best parts of the surround sound experience!
    TV = WS65611
    Pre-Amp Onkyo 830
    Amp Aragon 2007
    Panamax 5510
    Towers = LSi25s
    Center = LSiC
    Side Rear (2) = LSiFX
    Rear (2) = LSiFX
    JBL S120P II
    Sony Upconverting DVD Player
    XBox
    XBox 360 (Wireless connection live and media center enabled)
    PS3
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  • aaharvel
    aaharvel Posts: 4,489
    edited February 2006
    that B&K should be more than enough haveyouever. When you get everything hooked up, post your thoughts. I bet it was the 15's more than the others that overextended the Denon.

    Welcome to the forums.
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    "People working at Polk Audio must sit around the office and just laugh their balls off reading many of these comments." -Lush
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  • mantis
    mantis Posts: 17,204
    edited February 2006
    kmartin971 wrote:
    You need an amp. I had the same issue with my Onkyo and added an Aragon amp. Everything is amazing now! Although my 803 is rated for 4 ohms and rarely shutdown at resonably high volumns. Certain peak moments while watching DVDs would cause it shut down.


    Of course these peak momnents are the best parts of the surround sound experience!

    Guess you didn't see the fact he already ordered a B&K
    Dan
    My personal quest is to save to world of bad audio, one thread at a time.
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  • kmartin971
    kmartin971 Posts: 236
    edited February 2006
    Nice outlaw combo on ebay!

    http://cgi.ebay.com/Outlaw-Audio-Model-950-Model-7100-Combo_W0QQitemZ5867279346QQcategoryZ14978QQrdZ1QQcmdZViewItem
    TV = WS65611
    Pre-Amp Onkyo 830
    Amp Aragon 2007
    Panamax 5510
    Towers = LSi25s
    Center = LSiC
    Side Rear (2) = LSiFX
    Rear (2) = LSiFX
    JBL S120P II
    Sony Upconverting DVD Player
    XBox
    XBox 360 (Wireless connection live and media center enabled)
    PS3
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  • kmartin971
    kmartin971 Posts: 236
    edited February 2006
    I do not see where the B&K AVR507 S2 is rated for 4 ohms? I would call their custmer service department to find out. When I called yamaha and denon they answered my questions honestly and actually recommended other brands rated for 4 ohms.


    Go with a seperate amp!
    TV = WS65611
    Pre-Amp Onkyo 830
    Amp Aragon 2007
    Panamax 5510
    Towers = LSi25s
    Center = LSiC
    Side Rear (2) = LSiFX
    Rear (2) = LSiFX
    JBL S120P II
    Sony Upconverting DVD Player
    XBox
    XBox 360 (Wireless connection live and media center enabled)
    PS3
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  • shack
    shack Posts: 11,154
    edited February 2006
    kmartin971 wrote:
    I do not see where the B&K AVR507 S2 is rated for 4 ohms? I would call their custmer service department to find out. When I called yamaha and denon they answered my questions honestly and actually recommended other brands rated for 4 ohms.


    Go with a seperate amp!

    http://www.bkcomp.com/avr507_spec.asp
    "Just because you’re offended doesn’t mean you’re right." - Ricky Gervais

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  • kmartin971
    kmartin971 Posts: 236
    edited February 2006
    Thanks - thats a nice receiver!
    TV = WS65611
    Pre-Amp Onkyo 830
    Amp Aragon 2007
    Panamax 5510
    Towers = LSi25s
    Center = LSiC
    Side Rear (2) = LSiFX
    Rear (2) = LSiFX
    JBL S120P II
    Sony Upconverting DVD Player
    XBox
    XBox 360 (Wireless connection live and media center enabled)
    PS3
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  • mantis
    mantis Posts: 17,204
    edited February 2006
    For Lsi I can think of no better match then the B&K
    Dan
    My personal quest is to save to world of bad audio, one thread at a time.
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  • Frank Z
    Frank Z Posts: 5,860
    edited February 2006
    WAAAAAAAAAAAAAAAAAAAAA!!

    That's some funny shiznit there Dan.
    9/11 - WE WILL NEVER FORGET!! (<---<<click)
    2005-06 Club Polk Football Pool Champion!! :D
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  • haveyouever
    haveyouever Posts: 25
    edited February 2006
    OK guys!... I just returned from a visit to Tweeter on the way back from shipping off my damaged Denon 4806 for repairs. It just so happened, the owner was visiting the shop and he had the exact same setup at his house... he seems to have the luxury of switching out systems when the itch occurs?... :)... So, needless to say, I had a very willing partner in this trouble shooting venture. We mirrored our setup up at the house:

    Denon AVR-4806 - no amp!!
    Polk Lsi15s (front)
    Polk LsiC (center)
    Polk LsiFX (surround)

    And listened/watched music/movies for several hours (for example: Pink Floyd "The Wall" and The War Of The Worlds) and it never over heated or had an instance of the protective circuitry kicking in and shutting down the show! Not to mention, he's had the arrangement for approx. a year! And according to him, he's very liberal about cranking it up!!... We tested this setup for hours at 0.0dB and higher at times when our ears could handle it!!... the age factor did kick in?

    Lesson learned!!... I had a unit damaged in transit!!... the 4, 6, 8 ohm speaker array didn't affect this bad boy at all!... and we did test it with several other brand speakers!!... your thoughts?
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  • haveyouever
    haveyouever Posts: 25
    edited February 2006
    mantis wrote:
    For Lsi I can think of no better match then the B&K

    I had to put a halt on the B&K order until I could get a handle, or better yet, understanding of what was occuring? One thing I did notice with a closer look at the B&K was the fact it didn't have HDMI switching! I'm going to need that in my setup, it limits the number of digital runs to the Plasma.
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  • mldennison
    mldennison Posts: 307
    edited February 2006
    haveyouever wrote:
    Lesson learned!!... I had a unit damaged in transit!!... the 4, 6, 8 ohm speaker array didn't affect this bad boy at all!... and we did test it with several other brand speakers!!... your thoughts?
    how is the ventilation around your denon? if it is not that well ventilated, it will probably run a little hotter could be causing your problems...
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  • aat
    aat Posts: 45
    edited March 2006
    I had a Denon AVR-3805, LSi15s front, LSiC center, LSiFX side for about 1 year with no problem. I'm in the process of upgrading to AVR-4306 and LSi25s.

    Please let me know how is your AVR-4806 works with LSi15s, LSic and LSiFX?
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