about my gear

Discussion in 'Amps [BG]' started by leosep, Jan 26, 2013.


  1. leosep

    leosep

    Joined:
    Sep 12, 2012
    Hi all i want to post my gear just to see what you think about. I've been building my gear since i joined talkbass, from the opinions of users here and of course the limits of money hehe.

    Power AMP:

    4 channel unbalanced input
    Each channel treble bass reverb adjustable
    Effects loops
    5 band graphic equalizer
    phantom power
    300 watts stereo, only using one side, i think 150 watts.
    The XLR inputs says "preamp input" im not sure if each channel has a preamp
    Every channel have their own volume control
    Master volume
    This poweamp has no brand, the box just says Power Mixer.

    Cab:
    I made this 4x10 bass cab with some cheap drivers wired series/parallel to get 500 watts 8 ohms and a 23"w 26"h 18"z vented cab:

    General Specifications:
    Nominal Diameter: 10 inch
    Rated Impedance: 8 ohms
    Operating Bandwidth: 38Hz ~ 3KHz
    Power Handling Capacity: 125W RMS
    Sensitivity (1W/M): 95 dB
    Voice Coil Diameter: 2 inch
    VOverall frame diameter: 10.10"

    Thiele-Small Parameters:
    Resonance Frequency Fs: 38 Hz
    DC Resistance Re: 7.2 ohm
    Mechanical Q Factor Qms: 2.7
    Electrical Q Factor Qes: 0.369
    Total Q Factor Qts: 0.32
    Equivalent Cas air load Vas: 62.0 liters
    Coil Inductance Le: 0.293 mH
    Efficiency Bandwidth Product EBP 102.98
    Voice Coil Over Hang X-max 3.5mm

    Physical Information:
    Basket: Stamped Steel
    Cutout: 8.90"
    Mounting Depth: 4.3"
    Magnet Type: 40 OZ
    Cone Material: Non-pressed paper
    Surround: Cloth
    Dust Cap: Paper
    Damper: Cloth

    Preamp:
    The art tube MP Studio

    Tone shaper:
    Behringer BDI21 - dont know if using this or not, the power amp has a graphic eq.

    Bass:
    Cheap Dr. Tech musicman style bass
    Kent Armstrong HBMN1 pickup

    Bass internal preamp:
    SBK-2
    Four (4) individual potentiometers:
    Balance, Treble, Volume & Bass
    Technical Specifications:
    Bass: +/-12 dB at 100 Hz
    Treble: +/-12 dB at 4 kHz
    Balance: MN500K potentiometer w/center detent
    Current: 0.16 mA
    Voltage range: 6 ~ 22 volt
    Battery Requirement: 9V alkaline (battery life is 1000+ hours)

    signal chain: Bass -> BDI21 -> ART TUBE MP - > power amp -> Cab

    Attached Files:

  2. RickenBoogie

    RickenBoogie

    Joined:
    Jul 22, 2007
    Location:
    Dallas, TX
    The ONLY opinion that matters, is YOURS. Are you happy with the tone? Do you have enough volume? Those are the only pertinent questions, and yours is the opinion that matters. You do not need anyone else to justify your decisions.
  3. B-string

    B-string Supporting Member

    Joined:
    Nov 21, 2008
    Location:
    Lake Havasu City, Az USA
    +1
    Only question is are the ports on your cab covered with carpet?
  4. leosep

    leosep

    Joined:
    Sep 12, 2012
    Hi, thanks for your responses, yes they are covered, i should uncover them to get best volume/definition right? i feel air coming out of them. I posted my gear just if you have some advise, a change of the setup, recommendations, etc... Are the woofers specs good for you? signal chain? i think i have enough power in this amp, the VU meter clips or goes red, almost on half way of the volume of the channel and master volume...and the gain of the ART TUBE 1/4 of gain, but with the volume button boost on, if that means something.
  5. B-string

    B-string Supporting Member

    Joined:
    Nov 21, 2008
    Location:
    Lake Havasu City, Az USA
    Your ports are barely active with being covered. As far as gain if you don't get distortion you're good. The Xmax looks okay on the drivers, the sensitivity is not bad. I didn't re-model for you to check cab volume and porting. Be ready to cover the ports if you get excessive speaker cone movement in the very low end. Best to use a purchased cab model program to check your tuning, I only have a free version.

    If the powered mixer has a power amp in jack I would connect the Art there to bypass the mixers channel strips.
  6. themacinator

    themacinator Supporting Member

    Joined:
    Oct 8, 2009
    Location:
    The Bluebonnet State
    Disclosures:
    Endorsing Artist: Babicz FCH Hardware
    Curious about the total investment you have made. If you care to share it of course.
  7. shaginwagin

    shaginwagin

    Joined:
    Apr 2, 2012
    Location:
    Arizona
    You know, it doesn't really matter how the tone is created...

    As long as its sweet.


    We need sound clips!
  8. leosep

    leosep

    Joined:
    Sep 12, 2012
    Sure themacinator, didnt buy all that in one day of course:

    Power AMP: $170.00 but i had it from a PA that i used in eletro house, tribal, minimal parties , it has integrated usb mp3 player, mixer...
    Cab: $121.00 box and drivers
    ART Preamp: $30.00
    BDI21 Tone shaper: $37.00
    Bass: $99.00
    Kent Armstrong HBMN1 pickup: $45.00
    Bass internal preamp: $23.24

    Like: $525.24 or a bit more

    You are right shaginwagin...i know i should trust more in my ears.
  9. themacinator

    themacinator Supporting Member

    Joined:
    Oct 8, 2009
    Location:
    The Bluebonnet State
    Disclosures:
    Endorsing Artist: Babicz FCH Hardware
    So I would say that you did well. You have custom gear made to your specs that you like for a small amount of dough. Good for you.

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