NAD T753 and Polk LSi9s...power issue?

gellor
gellor Posts: 11
edited April 2009 in Troubleshooting
Hello,

I have a NAD T753 receiver pushing a pair of LSi9s. The issue is that the speakers just don't seem to get all that loud. I was wondering if there is anyway to test the receiver's power output.

Thanks!
Post edited by gellor on
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  • okiepolkie
    okiepolkie Posts: 2,258
    edited October 2005
    You probably won't get a tremendous amount of output from that receiver(although very good) with those speakers. The LSi's sound good with NAD, but there just isn't enough power to give them what they need. My suggestion would be to get a good two channel amp to power the 9's. They beg for good, clean power and will become a completely new speaker with it.

    Hope this helps.

    Zach
    Tschüss
    Zach
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  • shack
    shack Posts: 11,154
    edited October 2005
    I disagree. That receiver has enough high current power to push the 9s easily. Rated down to 2 ohms. With 70 wpc continuous at 4 ohm the should be able to go VERY loud. I would look for other issues.
    "Just because you’re offended doesn’t mean you’re right." - Ricky Gervais

    "For those who believe, no proof is necessary. For those who don't believe, no proof is possible." - Stuart Chase

    "Consistency requires you to be as ignorant today as you were a year ago." - Bernard Berenson
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  • hoosier21
    hoosier21 Posts: 4,411
    edited October 2005
    gellor wrote:
    The issue is that the speakers just don't seem to get all that loud.

    Maybe tell us more about this issue, how loud is VERY LOUD? What is "just don't seem to get all that loud."

    I have had these speakers, and using a 60wpc amp, plenty of volume.
    Dodd - Battery Preamp
    Monarchy Audio SE100 Delux - mono power amps
    Sony DVP-NS999ES - SACD player
    ADS 1230 - Polk SDA 2B
    DIY Stereo Subwoofer towers w/(4) 12 drivers each
    Crown K1 - Subwoofer amp
    Outlaw ICBM - crossover
    Beringher BFD - sub eq

    Where is the remote? Where is the $%#$% remote!

    "I've always been mad, I know I've been mad, like the most of us have...very hard to explain why you're mad, even if you're not mad..."
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  • gellor
    gellor Posts: 11
    edited October 2005
    First off thanks for the replies so far. Here is a little more detail. Two days ago I put in the U2 CD Joshua Tree. I turned the volume up to -13 on the OSD. I was sitting on a couch about 9' away from the speakers. I could have easily had a conversation with anyone sitting in the room just by talking loudly, not yelling.

    Another thing is if I run it at -12 for a while the reciever will kill and the light on the front by the power button turns red. I have to unplug the unit and then plug it back in to get it to power on again.

    Just odd things like that. Different media makes it a bit louder or quieter. If I put in the Shrek 2 DvD it really doesn't get loud at all.

    I have unhooked everything and hooked up just the front LSi9 speakers to the receiver with only a CD play attached with the same results. I have swapped out the speaker wires and even swapped out the speakers with some old small Energy bookshelves from college. I thought for sure the receiver would blow the Energys up, but it didn't really get all that loud either.

    On a final note I should define what I think is loud. I have an old pair of Pioneer floor speakers I used in college with HK receiver. Now they sounded like junk, but you couldn't talk if I cranked them up. Now i'm not looking to get that loud, but it would be nice to turn up my surround sound system when I'm listen to my Linkin Park DvD after I have had a couple beers :)

    Thanks for any help you can provide!
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  • hoosier21
    hoosier21 Posts: 4,411
    edited October 2005
    Your NAD may have a problem, that doesn't sound right.
    Dodd - Battery Preamp
    Monarchy Audio SE100 Delux - mono power amps
    Sony DVP-NS999ES - SACD player
    ADS 1230 - Polk SDA 2B
    DIY Stereo Subwoofer towers w/(4) 12 drivers each
    Crown K1 - Subwoofer amp
    Outlaw ICBM - crossover
    Beringher BFD - sub eq

    Where is the remote? Where is the $%#$% remote!

    "I've always been mad, I know I've been mad, like the most of us have...very hard to explain why you're mad, even if you're not mad..."
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  • okiepolkie
    okiepolkie Posts: 2,258
    edited October 2005
    Sorry for my misinformation. I went and relooked up the specs on the NAD and saw that it should run them fine.
    Tschüss
    Zach
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  • tryrrthg
    tryrrthg Posts: 1,896
    edited October 2005
    Take a look at your receiver's settings. you might have some kind "night mode" or some other dynamic range limiter on...
    Sony KDL-40V2500 HDTV, Rotel RSX-1067 Receiver, Sony BDP-S550 Blu-ray, Slim Devices Squeezebox, Polk RTi6, CSi3 & R15, DIY sub with Atlas 15
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  • shack
    shack Posts: 11,154
    edited October 2005
    Have you gone into the menu and set the speaker volume levels? You can basically go into the menu and turn them off (no matter how high you push the volume control). I would check that first as a simple solution. There may be listening "modes" that will bring down the sound level (ie: nighttime settings that lower all sound levels). Have the speakers somehow been routed to one of the seconddary zones? If none of these sort of things are the problem then I would have the receiver checked out as there may be electronic issues.
    "Just because you’re offended doesn’t mean you’re right." - Ricky Gervais

    "For those who believe, no proof is necessary. For those who don't believe, no proof is possible." - Stuart Chase

    "Consistency requires you to be as ignorant today as you were a year ago." - Bernard Berenson
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  • gellor
    gellor Posts: 11
    edited October 2005
    Thanks all, I have checked about everything I could on it. I'll probably just end up bringing it in. It's still under the 2 year warrenty. I just dread unhooking all the stuff :) Thanks for the help and have a good weekend.
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  • heiney9
    heiney9 Posts: 25,165
    edited October 2005
    If it's going into protection (which it is if the red light is coming on and you have to reset the unit) sounds like it's not beefy enough to play as loud as you want. Since it's still under warranty it's a good idea to have it checked. You may find it's in spec and just need to go to a seperate amplifier. Nine feet away isn't a huge distance, still farther than most people would listen from. How big your room? You may need more power to fill the room if it's a large room.

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
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  • shack
    shack Posts: 11,154
    edited October 2005
    heiney9 wrote:
    If it's going into protection (which it is if the red light is coming on and you have to reset the unit) sounds like it's not beefy enough to play as loud as you want. .... You may find it's in spec and just need to go to a seperate amplifier. Nine feet away isn't a huge distance, still farther than most people would listen from. How big your room? You may need more power to fill the room if it's a large room.

    H9
    Having used several NAD amps I find it very hard to believe that under normal circumstances (even at very high volumes or how big the room) the NAD would go into protect mode with the LSi9s. I've heard the 320BEE integrated (50wpc) push a pair of LSi15s as loud as I would EVER want to hear them. If at -13 he can have a conversation and at -12 it goes into protect mode, then there is some internal issue here. I hope it can be corrected under the warranty.
    "Just because you’re offended doesn’t mean you’re right." - Ricky Gervais

    "For those who believe, no proof is necessary. For those who don't believe, no proof is possible." - Stuart Chase

    "Consistency requires you to be as ignorant today as you were a year ago." - Bernard Berenson
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  • reeltrouble1
    reeltrouble1 Posts: 9,312
    edited October 2005
    ^^^^ You got it Shack, he has some kind of short in the wiring or something is wrong with the speakers or the unit. It should not be going into protect mode at -13 db.

    RT1
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  • michael_w
    michael_w Posts: 2,813
    edited October 2005
    That does sound very odd. I run my LSi7's off a NAD C352 (integrated amp rated at 80wpc into 4 or 8 ohms) and I can get it pretty damn loud. I've never pushed it past 12 o'clock and if I anticipate I'll be giving it a workout like that I just make sure to flip on soft clipping. While my nad bearly breaks a sweat with my 7's in my room I have tried them in a much larger room and had a different experiance. With really large rooms I found my 7's had to be pushed fairly hard to get decent volume.

    Pushing it to the point of the led going red (putting it into protection mode) isn't good. Either your expectations are too high for the 9's mated with the NAD or there is something messed up with your receiver.

    How warm does it get when trying to reach those levels?
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  • car-zone
    car-zone Posts: 1
    edited April 2009
    Diplodocs help download the user guide NAD T753 - English. ... Need help, support, reviews, tips or troubleshooting for your NAD T753 products ? The Carver is good but the NAD sounds much fuller and more punchy...The NAD has very good stereo image and it is a powerful machine...This NAD T-753 is a amazing because it can challenge a good Arcam integrated amp at the same price...
    car zone
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  • Kex
    Kex Posts: 5,194
    edited April 2009
    car-zone wrote: »
    Diplodocs help download the user guide NAD T753 - English. ... Need help, support, reviews, tips or troubleshooting for your NAD T753 products ? The Carver is good but the NAD sounds much fuller and more punchy...The NAD has very good stereo image and it is a powerful machine...This NAD T-753 is a amazing because it can challenge a good Arcam integrated amp at the same price...
    Reported, dude!

    He has no need for diplodocs, or the carzone link in your signature for this. The manual is available online, if he doesn't have it, from NAD.

    http://nadelectronics.com/product-manuals#AVReceivers
    Alea jacta est!
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  • Kex
    Kex Posts: 5,194
    edited April 2009
    reeltrouble1 wrote: »
    ^^^^ You got it Shack, he has some kind of short in the wiring or something is wrong with the speakers or the unit. It should not be going into protect mode at -13 db.

    RT1
    +1. The "dynamic" power for this model is 200w at 4 ohms, and in any case, if he activitates the "soft clipping" feature, it should activate long before protection could kick in. I agree with the others who are saying that even the 50w/ch NAD units play louder than anyone would ever want to listen in any "normal" sized room situation.

    Gellor, the -13dB is not important, because it depends on how you calibrated your system. You should have calibrated to 75dB @ -10dB on the volume control IMO (that's how I calibrated my T754), which would allow an output of 85dB at the 0dB setting. With these settings, 0dB should be loud for movies, and almost impossibly loud for music in my experience. You certainly would not be able to talk without shouting, even to a person sitting right next to you.

    Something is wrong IMO too. I do not believe it is a Night Mode issue either (Enhanced Stereo 2, on this model, IIRC, which sends stereo output to the surround speakers and subwoofer only).
    Alea jacta est!
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