Please Help

dro159
dro159 Posts: 7
edited December 2012 in 2 Channel Audio
Hey Everyone,
I am getting my father a new set of speakers (thinking of Polk Monitor70s) for his Kenwood Basic M2 that seems to blow every speaker my father hooks up to it (Not a fault with the unit, It's more because he likes his music loud and doesn't get speakers that can handle it).

Would those speakers handle this?

Kenwood Basic M2 Specs:
Specifications
Power output: 220 watts RMS per channel into 8 ohms
Total harmonic distortion: 0.004%
Damping factor: more than 1000
Frequency response: 1Hz to 200kHz
Signal to noise ratio: 120dB
Speaker impedance: 4 to 16 ohms

Thank you in advance
Post edited by dro159 on

Comments

  • classic carl
    classic carl Posts: 648
    edited December 2012
    Your father needs to know that when the amp starts to clip or the speakers start to distort, it's time to turn it down. Any speaker can be blown if they are abused or pushed beyond their limits.
    Main System:
    Proton AA-1150 ~ Yamaha C-4 ~ Furman Elite-15 DMi ~ Sennheiser HD600 ~ Monitor Audio Silver RS8 & FB210 ~ Martin Logan Dynamo ~ Teac R-919X ~ Marantz CD5003 ~ Squeezebox Classic ~ Music Hall dac25.2 ~ Dual 1229/Acutex M312 III STR ~ Music Hall mmf-5.1/Goldring 1012GX ~ Music Hall Cruise Control 2.0

    Home Theater:
    Vizio V585-H11 ~ Yamaha RX-V800 ~ Furman Elite-15 DMi ~ Marantz DV6001 ~ EPI M90 ~ Polk Audio RT35i ~ CS400i ~ (2) Polk Audio PSW450

  • erniejade
    erniejade Posts: 6,321
    edited December 2012
    Your father needs to know that when the amp starts to clip or the speakers start to distort, it's time to turn it down. Any speaker can be blown if they are abused or pushed beyond their limits.

    +1

    Another thing that can blow speakers is under powering them as well. Under powering them can cause distortion at loud levels. When a amp clips or a speaker distorts, it heats the coils up and causes them to blow especially the tweeter.

    Question is it the tweeters that he is blowing? if so, either turn it down a hair or get a more powerful amp. If its the woofer that he is blowing, then add a powered subwoofer into the system.
    Klipsch The Nines, Audioquest Thunderbird Interconnect, Innuos Zen MK3 W4S recovery, Revolution Audio Labs USB & Ethernet, Border Patrol SE-I, Audioquest Niagara 5000 & Thunder, Cullen Crossover II PC's.
  • dro159
    dro159 Posts: 7
    edited December 2012
    Thanks for the reply guys,
    I think the woofer was blown on the last set, you can still hear the tweeters.
  • naturallight
    naturallight Posts: 689
    edited December 2012
    First off what speakers has he blow up?? Has this power amp been checked out at all? What music is he trying to play and at what volume??
  • steveinaz
    steveinaz Posts: 19,538
    edited December 2012
    Power handling capabilities of a speaker are assuming good/clean power that is not clipped. Under-powered amps claim far more tweeters than over-powered amps.
    Source: Bluesound Node 2i - Preamp/DAC: Benchmark DAC2 DX - Amp: Parasound Halo A21 - Speakers: MartinLogan Motion 60XTi - Shop Rig: Yamaha A-S501 Integrated - Shop Spkrs: Elac Debut 2.0 B5.2
  • dro159
    dro159 Posts: 7
    edited December 2012
    The original ones he got with the system where some type of Sansui with a bunch of speakers in the cabinet, I think 8 way or so. He still has them (these lasted the longest, They blew maybe 4 years ago), the tweeters are blown off of that. Next he got some Sonys then some cheap Pyle ones. He listens to Spanish Rock. In terms of volume I am not really sure.
  • naturallight
    naturallight Posts: 689
    edited December 2012
    Ok...these are cheap speakers....not going to work well at really loud volume. How much money do you have to spend on speakers?
  • dro159
    dro159 Posts: 7
    edited December 2012
    I was planning on about $200 per speaker but do you have any recommendation? I was also thinking if maybe Monitor70 would not handle it that I would get 2 pairs and have them hook up by zones, This amp is a 2 channel 2 zone
  • naturallight
    naturallight Posts: 689
    edited December 2012
    OK..how big is the room he is listening in? "assumeing" the Kenwood is NOT the problem....forget about 4 speakers. He is pushing these speakers far beyound what they can handle. To be blunt..he needs some Cerwin Vegas..maybe a used set of AT12's or something. He is playing these really loud..these speakers you said, are just not made to do that...he's just frying them.
    The CV's will play louder then he can handle..sound better then cheap Sonys, and ar hard to blow up.
  • dro159
    dro159 Posts: 7
    edited December 2012
    Those look great and fit my budget, I will definitely look at those. Thank you so much!
  • naturallight
    naturallight Posts: 689
    edited December 2012
    Let me put it this way. The Sonys and the other speakers he has blown are not high quality, nore Hi Fidelity speakers. Again.."assuming" nothing wrong with the Kenwood..he is throwing far more watts at these speakers then they can handle, plus trying to play them really loud, as to try and get bass out of them..which again..they really can't do...period. He's just frying the speaker coils.



    Now i'm a big fan of Polk speakers...but just based on what you have already said....not sure there the right speakers for him. Again...the CV speakers are probably your best bet. He wants loud...probably with alot of bass. The CV's will do that. The speakers you mentioned...are NOT stereophile stuff...the CV's will just sound better all the way around.
  • dro159
    dro159 Posts: 7
    edited December 2012
    I really like the look and sound quality of the Polks, I personally have some Monitor40s with a Yamaha CRX receiver and it sounds amazing that is the reason I wanted to give him the Monitor70s. I am still contemplating on just giving him the Polks and just telling him to take it easy on the volume. The CV's are definitely a good second option
  • erniejade
    erniejade Posts: 6,321
    edited December 2012
    I agree with CV in this situation. Otherwise, for polk, i think you would be looking at something like the monitor 70 with a subwoofer, or or a used set of RTI12 but, i would still get a subwoofer with it.
    Klipsch The Nines, Audioquest Thunderbird Interconnect, Innuos Zen MK3 W4S recovery, Revolution Audio Labs USB & Ethernet, Border Patrol SE-I, Audioquest Niagara 5000 & Thunder, Cullen Crossover II PC's.
  • naturallight
    naturallight Posts: 689
    edited December 2012
    I would agree with you on the sound of the monitor 70's...i'm sure there going to sound fine.

    BUT...knowing what your father already has already blown up...May not be such a good idea.



    Polks may be "accurate" but are not know for massive volume. I'm 60 years old..I kind of know what your father wants to hear. He wants loud rock with bass kicking his butt...LOL The Polks are just NOT going to give him that.

    The CV's on the other hand..are not as "accurate"..BUT will give him the **** kicking bass he wants and the volume...and he will be hard pressed to blow them up...as there designed to blow your face off....LOL



    You can buy what you want..but telling your father to keep the volume down.....well..really?
  • dro159
    dro159 Posts: 7
    edited December 2012
    that is definitely true, that has got to be the reason why he likes it loud lol. I guess I will look in the CV's. Thank you guys!
  • gdb
    gdb Posts: 6,012
    edited December 2012
    Uhhh, maybe a fuse in line would be prudent. :smile:
  • pitdogg2
    pitdogg2 Posts: 25,446
    edited December 2012
    gdb wrote: »
    Uhhh, maybe a fuse in line would be prudent. :smile:

    Hence the Cerwin Vega suggestion both the tweeter and whole speaker is fused.
    they take tons of abuse and ask for more.