4 channel vs. 5 Channel w/ 4speak & 1sub Assitance

[nutshellml]

I have 4 6.5 infinity's and 1 sub and was wondering if someone can let me know what I will be loosing if I go with a 4 channel amp vs. a 5 channel amp (i don't have room for two amps (4channel and 1 for sub).

The four channel is: 60 watts RMS x 4 at 4 ohms (90 watts RMS x 4 at 2 ohms)

# 175 watts RMS x 2 in bridged mode (4-ohm stable in bridged mode)

The five channel is: # 70 watts RMS x 4 + 210 watts x 1 at 4 ohms (85 watts RMS x 4 + 420W x 1 at 2 ohms)

# 165 watts RMS x 2 in bridged mode (4-ohm stable in bridged mode)

My speakers are 4 ohm and the sub is 4ohm (power range: 50-150 watts RMS)

My buddy is trying to tell me that with the 4channel, all i will loose is fading front to back, but won't I loose power also? The sub will pull the most and i will loose power to the speakers. Also, won't the sub try and play vocals like the rest of the speakers because of the way it's set up? And when i try to control the bass I will be controling the bass for everything not just the sub....

Any technical insight is greatly appreciated.

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[nutshellml]

Update: Four Infinity's are 2-way, RMS Power Range (Watts) 2-75 Peak Power Handling (Watts) 225

 

[thevic24 5,000+ posts]

you will loose power, flexability and tunig.

 

[Franz]

5 channel you talking about the Kicker 700.5 channel 1 to 4 AB channel 5 class D its like 2 Amps together, i run the 08 700.5 front and rear one Eclipse 6.5 100rms and Sub. JL 13w3v3 2 ohm powerful and clean Amp.

 

[nutshellml]

Thanks for the info guys... That's what I thought, I'm going with the 5 channel, 700.5!