Project: "Cygnus" 2-way speakers

Discussion in 'The Completed Projects Collection' started by cumesoftware, Apr 24, 2010.

  1. cumesoftware

    cumesoftware Thread Starter Senior Member

    Joined:
    Apr 27, 2007
    Messages:
    1,330
    Location:
    Portugal
    List of components:
    C1/3 – Capacitor Visaton ELKO spez. 2,2µF;
    C2 – Capacitor Visaton ELKO spez. 10µF;
    FTE1 – Woofer Visaton SC 13 8 OHM;
    FTE2 – Tweeter Visaton SC 10 N 8 OHM;
    L1 – Coil Visaton SP 0,68mH 1mm;
    L2 – Coil Visaton SP 0,68mH 0,6mm;
    R1 – 8,2Ω wirewound resistor (5% tol., 5W).
    R2 – 2,2Ω wirewound resistor (5% tol., 7W).
    R3 – 18Ω wirewound resistor (5% tol., 5W).

    Electrical parameters:
    - Pnom = 50W
    - Ppk = 80W
    - R = 6,4Ohm
    - Znom = 8Ohm

    Audio characteristics:
    - Frequency response (-10dB): 40-20000Hz
    - Sensitivity (1W/1m): 87dB

    Recommended enclosure specifications:
    - Type: Ported (3th order quasi-Butterworth alignment)
    - Volume: 9.756L
    - Recommended duct: Monacor BR-30HP (length: 64mm)
    - Resonant frequency (Fb): 50.64Hz
    - -3dB frequency (F3): 52.30hz

    Attached Files:

    Last edited by a moderator: Oct 5, 2010
  2. bertus

    bertus Administrator Staff Member

    Joined:
    Apr 5, 2008
    Messages:
    12,608
    Location:
    Amsterdam,Holland (GMT + 1)
    Hello,

    Are you also going to make a description of the housing for the speakers?
    That would make it a complete project with your filter set you made now.

    Greetings,
    Bertus
  3. R!f@@

    R!f@@ AAC Fanatic!

    Joined:
    Apr 2, 2009
    Messages:
    7,088
    Location:
    Euphoria.., The One & Only {GMT +5}
    I wouldn't use passive cross over ever.
    active cross over is the way to true audio.

    By the way, ever thought about using wire wound resistors introducing extra inductance in to the crossover, you should go for cement ones.
    Or am I wrong here?
  4. cumesoftware

    cumesoftware Thread Starter Senior Member

    Joined:
    Apr 27, 2007
    Messages:
    1,330
    Location:
    Portugal
    Thanks! The box is already planned and I'll post it any time soon.

    Indeed! Active crossovers are much more linear, but they require separate output stages for the high and low frequencies. You can have two approaches: an amplifier having those stages or an active speaker.

    About the resistors, the ones I'm using have a cement filler. And the inductance is very, very small.
  5. R!f@@

    R!f@@ AAC Fanatic!

    Joined:
    Apr 2, 2009
    Messages:
    7,088
    Location:
    Euphoria.., The One & Only {GMT +5}
    Indeed

    I guess then It's OK
  6. abdus

    abdus New Member

    Joined:
    Mar 4, 2010
    Messages:
    22

    hello there ,
    can i use this circuit with the bass trrible and midi controller??
    i jst have made the passive low pass bass trreble and midi circuit with adjustable gain of +-18db an i use tda7052 to amplify the power with 8 ohms speaker
    can i use this circuit with that one???
  7. cumesoftware

    cumesoftware Thread Starter Senior Member

    Joined:
    Apr 27, 2007
    Messages:
    1,330
    Location:
    Portugal
    If I understood your question, I think you will have no problem using those speakers with your amplifier. These are 8Ohm speakers.
  8. Audioguru

    Audioguru New Member

    Joined:
    Dec 20, 2007
    Messages:
    9,411
    Location:
    Ontario, Canada
    If the supply is 6V then the output at clipping into 8 ohms is only 0.96W. A cheap clock radio has more power.

    Your tone controls have a max boost of about 80 times the power so unboosted frequencies have a max power of only 0.012W.
  9. cumesoftware

    cumesoftware Thread Starter Senior Member

    Joined:
    Apr 27, 2007
    Messages:
    1,330
    Location:
    Portugal
    Indeed! Those speakers will sustain up to 50W nominal power, which is far greater than the power of 1W that a TDA7052 can provide.

    I'm afraid we are going off-topic here. I don't see any point or relation with the actual project being discussed here.
  10. cumesoftware

    cumesoftware Thread Starter Senior Member

    Joined:
    Apr 27, 2007
    Messages:
    1,330
    Location:
    Portugal
    Someone messed this up big time. This thread should be called "Project: "Cygnus" 2-way speakers". This is Cygnus, not Lynx.
  11. bertus

    bertus Administrator Staff Member

    Joined:
    Apr 5, 2008
    Messages:
    12,608
    Location:
    Amsterdam,Holland (GMT + 1)
    Hello,

    I changed the title for you.

    Bertus
    cumesoftware likes this.
Similar Threads
Forum Title Date
The Completed Projects Collection Project : Battery Buckets Friday at 2:01 AM
The Completed Projects Collection Project : Electronic Load Sep 16, 2014
The Completed Projects Collection Project: TA1000PS - PSU for audio amplifiers with protection, sofstart and fan contro Jul 20, 2014
The Completed Projects Collection Project : Mono Preamp Nov 24, 2013
The Completed Projects Collection Project : Halloween boo badge Oct 5, 2013

Share This Page