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Old 10th November 2009, 02:07   #1
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Default Infinity Kappa 4 vs Kenwood XR-4S vs Kicker ZX650.4

Dear All,

I wanted a 4 Ch Amp that could power my front components and rear coaxials.
My critera in deciding were;
  • Above 110 RMS on each channel
  • Price - below US $300
  • Relativley new to market
  • Compact in Size

I have shortlisted the following based on above criteria;

Infinity Kaapa Four
Specs
  • 4 channel amplifier
  • 125 watts RMS x 4 at 4 ohms (150 watts RMS x 4 at 2 ohms)
  • 300 watts RMS x 2 bridged at 4 ohms
  • variable high- and low-pass filters (32-320 Hz, 12dB per octave)
  • bass boost: 0-12 dB
  • frequency response: 10 Hz to 75 kHz
  • Non-stop Thermal Protection ciruitry
  • Class-D amplifier design
  • differential balanced speaker-and preamp-level inputs
  • 4-gauge power and ground leads and a 80-amp fuse recommended wiring and hardware not included with amplifier
  • fuse rating: 40A x 2
  • 7-1/16"W x 1-3/4"H x 14-5/8"D
  • 1-3/4" tall
  • CEA 2006-compliant

Kenwood XR-4S
Specs
  • Reference Fit Class AB/A Car Amplifier
  • RMS Power Rating:
  • 4 ohms: 120 watts x 4 chan.
  • 2 ohms: 150 watts x 4 chan.
  • Bridged, 4 ohms: 300 watts x 2 chan.
  • Max power output: 300 watts x 4 chan.
  • Digital amplifier technology with dual MOSFET switching power supply
  • Remote bass level input (Kenwood KAC-X1D remote level control sold separately)
  • LED power indicators
  • 4/3/2 Channel operation
  • Line inputs
  • AB/A Channel input selector with independent gain adjustment
  • Single side exposure of terminals for multi-installation
  • 3-Way System Protection circuitry (thermal, overload, and speaker short protection)
  • Heavy duty aluminum alloy heatsink with built-in cooling fan for extreme heat dissipation
  • Removable top plate allows for custom fabricators to easily create their own plates
  • Gold-plated RCA level inputs
  • Gold-plated screw terminals
  • Variable high-pass filter (Low Range: 50-200 Hz, 12 dB/octave | High Range: 2,500-10,000 Hz, 12 dB/octave)
  • Variable low-pass filter (Low Range: 50-200 Hz, 12 dB/octave | High Range: 2,500-10,000 Hz, 12 dB/octave)
  • Infrasonic Filter (24 dB at 15-40 Hz)
  • CEA-2006 compliant amplifier
  • Frequency response: 20-20,000 Hz
  • Dimensions: 9-1/4"W x 2-1/16"H x 7-9/16
"D


Kicker ZX650.4
Specs
  • 4 Channels ZX Series car amplifier
  • 120 watts RMS x 4 channels at 4 ohm
  • 170 watts RMS x 4 channels at 2 Ohm
  • 325 watts RMS x 2 channels at 4 Ohm bridged mode
  • Three automatic turn on modes
  • Removable top for easy customization
  • Input gain control
  • High/Low or All-pass crossover
  • Differential inputs eliminate noise and improve Factory radio capability
  • KICKEQ™ Bass Boost
  • Remote bass control
  • Frequency response: 20-20,000 Hz
  • Signal to noise: 95dB

Can you Gurus please suggest me which of these makes better sense to buy.

I am ordering this in 2 days from now. Quick response will be greatly appreciated

Thanks in advance
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Old 10th November 2009, 02:28   #2
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I say Infinity and Kenwood would be a better pick.
Also, look at SoundStream Reference series amp.
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Old 9th March 2010, 15:22   #3
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Go for Infinity Kappa 4 without a second doubt. 106dB Ref. SNR Class D Monster. If you want pure quality and power, go for Infinity. Kenwood Class D 4 channel is available for as low as some 8000 and Infinity Kappa 4 around 39000, and just think that everything comes for a price, and so is the quality... I hope you will make a wise decision..
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Old 9th March 2010, 17:11   #4
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Infinity Kaapa Four is the way to go man. Its the best between these 3
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Old 31st March 2011, 23:48   #5
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Default Re: Infinity Kappa 4 vs Kenwood XR-4S vs Kicker ZX650.4

which is better choice to power front compos and rear coax(SPL setup)
infinity kappa 4
DLS RA 40
moscono gladen one 120.4
focal solid4
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Old 1st April 2011, 12:05   #6
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Default Re: Infinity Kappa 4 vs Kenwood XR-4S vs Kicker ZX650.4

Quote:
Originally Posted by procircuit_234 View Post
which is better choice to power front compos and rear coax(SPL setup)
infinity kappa 4
DLS RA 40
moscono gladen one 120.4
focal solid4

DLS RA 40 !!!!

Mosconi is nice too , but RA 40 has won many awards world wide for its SQ so DLS is my pick
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Old 21st September 2011, 23:57   #7
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Default Re: Infinity Kappa 4 vs Kenwood XR-4S vs Kicker ZX650.4

Quote:
Originally Posted by Mi10 View Post
Dear All,

I wanted a 4 Ch Amp that could power my front components and rear coaxials.
My critera in deciding were;
  • Above 110 RMS on each channel
  • Price - below US $300
  • Relativley new to market
  • Compact in Size
I have shortlisted the following based on above criteria;

Infinity Kaapa Four

Kenwood XR-4S

Kicker ZX650.4
HI there

These are exactly the three amps that I have finalized out of which I need to choose one.
I am more inclined towards Kicker due to more power.
What do u say guys?

Mi10, What have you finalized?

Thanks
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