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Crossover frequency setup

Discussion in 'Home Cinema & Hi-Fi' started by ver01@, Apr 18, 2019.

  1. ver01@

    Gangster

    Joined: Aug 7, 2017

    Posts: 376

    Got a JBL SCS200.5 speaker system for free and was thinking of using it instead of the soundbar. I am going to use it as 3.1 configuration initially (sub, L R and centre). For the sub I found that I should set the crossover at 120Hz but not clear about the other speakers. Have configured them as "small" but their specs according to the manual are 110Hz for L and R and 100Hz for the centre speaker. Should I use these values for the crossover?
     
  2. ramdrive

    Gangster

    Joined: Jun 14, 2013

    Posts: 343

    Location: UK

    What receiver are you using?

    Looking at those speakers the crossover would probably be set at 120Hz - 150Hz...
     
    Last edited: Apr 18, 2019
  3. hornetstinger

    Soldato

    Joined: Sep 6, 2016

    Posts: 5,784

    I'd it's one of those htib you may find the mai n unit has eq applied to the speakers and they usually have crazy low 4 ohm impedance
     
  4. ver01@

    Gangster

    Joined: Aug 7, 2017

    Posts: 376

    It's a Denon 1612
     
  5. hornetstinger

    Soldato

    Joined: Sep 6, 2016

    Posts: 5,784

    Don't go by specs because for low end htib it's useless. Go by driver size and cabinet size with approximation.

    No real figure
     
  6. ver01@

    Gangster

    Joined: Aug 7, 2017

    Posts: 376

    Doesn't make sense as you can have speakers with same driver and cabinet size but difference specs. The materials used surely make a difference?
     
  7. ver01@

    Gangster

    Joined: Aug 7, 2017

    Posts: 376

    Isn't it 8 Ohm according to specs?

    SCS200.5/230
    Frequency Response 35Hz – 20kHz (–6dB)
    SATELLITES
    Maximum Recommended Amplifier Power
    100 Watts
    Power Handling (Continuous/Peak)
    50W/160W
    Nominal Impedance 8 Ohms
    Sensitivity 86dB @ 1 Watt/1 meter
    Frequency Response 110Hz – 20kHz (–6dB)
    Tweeter
    One 13mm (1/2") titanium-laminate dome,
    video-shielded
    Midrange
    One 75mm (3") driver, video-shielded
     
  8. hornetstinger

    Soldato

    Joined: Sep 6, 2016

    Posts: 5,784


    Not really no.if you get two 12" subs both ported both cabinet size they will usually be close frequency response.


    With that -6db figure pretty much set it fair bit higher than that. I'd set to 160hz. Also that is quite insensitive speaker it needs a lot of power. My massive speakers with multiplr drivers, three 8", one 6.5" and one 1" treble require less power to have the same dB output. Your speakers need twice as much power..
     
  9. ver01@

    Gangster

    Joined: Aug 7, 2017

    Posts: 376

    I thought that the geometry and the material of the of the cabinet make a difference.
    The trade-off for the smaller size is a higher power requirement.
     
  10. hornetstinger

    Soldato

    Joined: Sep 6, 2016

    Posts: 5,784

    Cannae defeat the law of physics lad.
     
  11. ramdrive

    Gangster

    Joined: Jun 14, 2013

    Posts: 343

    Location: UK

    OK, Connect Subwoofer LFE to LFE on your receiver and run Audyssey MultEQ.

    Have a look and report back what Audyssey sets your crossover's to.
     
  12. ver01@

    Gangster

    Joined: Aug 7, 2017

    Posts: 376

    That's what I am saying. The enclosure's materials and design play an important role in the quality of the sound.
     
  13. hornetstinger

    Soldato

    Joined: Sep 6, 2016

    Posts: 5,784

    You asked about specs not sound quality. If you look for speakers of similar size, and driver size and design ported or sealed you'll have a fairly good estimate.
     
  14. hornetstinger

    Soldato

    Joined: Sep 6, 2016

    Posts: 5,784

    For example these speakers have sensitivity of 105db


    http://www.destinationaudio.eu/speakers.html

    That means with one watt yourswill be playing at 86db. But those will be at 105db.

    To reach 105db on your speakers you will need lots more power to reach 105db even if they could play that loud.

    Ithink you need twice the power every 6db
     
  15. hornetstinger

    Soldato

    Joined: Sep 6, 2016

    Posts: 5,784

    Also if they are designed to run through the subwoofer using a avr may be a bad idea. The sub unit apply eq correction to the says.
     
  16. ver01@

    Gangster

    Joined: Aug 7, 2017

    Posts: 376

    120 for sub and 120 for central 130 for L/R
     
  17. ver01@

    Gangster

    Joined: Aug 7, 2017

    Posts: 376

    Is that for the sub?

    If it's for the front speakers what happens with freq between 120-160Hz if the sub crossover is at 120Hz
     
  18. hornetstinger

    Soldato

    Joined: Sep 6, 2016

    Posts: 5,784

    No for the says. Sub will play sub 160hz. Not sure if 120-160hz discarded depends on the avr bass management
     
  19. ver01@

    Gangster

    Joined: Aug 7, 2017

    Posts: 376

    Manual says sub at 120Hz if the receiver offers the option
     
  20. ramdrive

    Gangster

    Joined: Jun 14, 2013

    Posts: 343

    Location: UK

    I would set all satellites and the centre to 140Hz, your sub is good up to 160Hz.

    You will need to place you sub close to the centre channel as part of the dialogue will be going through the sub.

    Also try 120Hz on everything and see how it sounds, your ears will be the best judge.
     
    Last edited: Apr 19, 2019