will this amp be better for my subs?

Discussion in 'OT Technology' started by Mikeveli, May 31, 2002.

  1. Mikeveli

    Mikeveli The Don

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    ok right now i have 2 12" POLK DB's (DYNAMIC BALANCE,discountinued model)...here are the specs on these subs...
    12"(30.5cm) Subwoofer
    db subwoofer drivers are optimized to deliver explosive bass performance when used in small sealed enclosures. They provide you with deep, tight and musical bass for the true high-end car stereo enthusiast.

    Ultra stiff mineral filled polymer cones withstand the extreme mechanical stresses generated in sealed enclosures. These are the stiffest, strongest cones you can buy
    Killer bass from enclosures as small as .9 cubic foot
    Steel / Polymer laminate basket damps basket resonance for clean, uncolored response
    Four-layer 2" diameter voice coil and vented pole piece for superior power handling
    Available in 8 and 4 Ohm versions


    Cutout Diameter
    11"
    27.94cm
    VAS
    2.54 ft3
    82.31L
    SD
    .563 ft2
    .0523m2
    Winding Width
    1"
    25.4mm
    Xmax - Linear
    .343"
    8.7mm
    Xmax - Mechanical
    1"
    25.4mm
    Height of Air Gap
    .315"
    8mm
    Magnet Assembly Weight
    9lb 2oz
    4.1kg
    Magnet Weight
    4lb 2oz
    1.9kg
    Vd - Volume of Driver
    .062 ft3Nominal Impedance
    4 Ohm
    Frequency Response
    20 - 200Hz
    Sensitivity
    86dB
    Power Rating
    800 watts
    Actual Impedance - RE
    3.7
    Max. Power (RMS)
    400 Watts
    Max. Power (Peak)
    800 Watts
    Resonant Frequency - FS (HZ)
    23.6Hz
    QMS
    4.523
    QES
    0.510
    QTS
    0.450
    Cms
    212
    BL
    15.00 TM
    Mms
    179 g

    and right now i also have a KENWOOD KAC-728 powering it...here are the specs on this amp...

    Key Features:
    Maximum Output Power: 600 Watts x 1
    Power Ratings:
    Bridged Power Output at 14.4V (1kHz, 0.8% THD): 300 Watts x 1
    Maximum Output Power: 600 Watts x 1
    Power Output at 2 Ohms, at 14.4V (1kHz, 0.8% THD): 150 Watts x 2
    Power Output at 4 Ohms, at 14.4V (20Hz-20kHz, 0.08% THD): 100 Watts x 2
    Power Supply Features 2-Ohm Stable
    Black Anodized Top Cover: with Aluminum Heat Sink Plate
    Copper-Shielded EE Core Transformer
    Large Secondary Capacitors
    Large Toroidal Noise Suppression Filter
    Power Indicator
    Power Input Terminals: Gold-Plated
    Power MOSFET Switching Power Supply
    Audio Features Ground Isolation Circuit
    Quiet Turn-On
    RCA Audio Inputs: Gold-Plated
    Selectable Low-Pass Electronic Crossover
    Speaker Connectors: Gold-Plated
    Speaker Level Input Terminals
    Speaker Relay Protection
    Stereo, Mono, or Tri-Mode Operation

    Now my question is will getting a KENWOOD KAC-929 be better for my subs? I can get this amp for about $220 including a 1 farad RF cap. (which i need)...here are the specs on this amp...

    GENERAL FEATURES
    - Ground Isolation Circuit
    - Low-Pass Electronic Crossover
    - Power MOSFET Switching Power Supply
    - Stereo, Mono, or Tri-Mode Operation
    - Variable Low-Pass Electronic Crossover: 50Hz - 200Hz, 18dB per Octave

    POWER RATINGS
    - Bridged Power Output at 14.4V (1kHz, 0.8% THD): 460 Watts x 1
    - Maximum Output Power: 1000 Watts
    - Power Output at 2 Ohms, at 14.4V (1kHz, 0.8% THD): 230 Watts x 2
    - Power Output at 4 Ohms, at 14.4V (20Hz-20kHz, 0.08% THD): 150 Watts x 2

    AUDIO FEATURES
    - Quiet Turn-On
    - RCA Audio Inputs: Gold-Plated
    - Speaker Connectors: Gold-Plated, Screw-Type
    - Speaker Level Input Terminals
    - Speaker Relay Protection

    POWER SUPPLY FEATURES
    - 2-Ohm Stable
    - Black Powder-Coated Top Cover: with Sandblast Finish
    - Copper EE-Core Power Transformer
    - Large Aluminum ID Badge
    - Noise Supression Filter: 3
    - Power Indicator: Blue
    - Power Input Terminals: Gold-Plated, Large Screw-Type
    - Secondary Capacitors: 2 Large

    AMPLIFIER FEATURES
    - 2 or 1 Channels of Amplification
    - Cooling Fan
     
  2. BobG

    BobG Fuchs.

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    Do you have the 4 or 8 ohm subs?
     
  3. Mikeveli

    Mikeveli The Don

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    i have no idea..i got my subs already in the enclosure...how can i find out?
     
  4. BobG

    BobG Fuchs.

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    Pull the subs out of the enclosure. Sometimes it'll say right on the back of the magnet or the rubber boot that goes over the magnet. I'm not familiar with Polk. Otherwise, you can grab the serial number that's usually written on the underside of the cone or sometimes on the magnet or basket somewhere. Call up Polk and ask them to tell you what version they are via the SN. If they're the 4 ohm version you'll have to wire one to each channel (stereo) rather than bridge the amp. I've had bad luck with bridging amps below their stability rating.

    If that is indeed the case, may I suggest the JBL BP600.1 amp? 600 watts @ 2 ohm mono. Class D switching. $209 at www.ikesound.com The guy's reliable, I've bought from him before as have many of my friends.
     

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