I know Doc praises the M series, but I'm trying to prove him wrong
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Equipment:
Eclipse AVN6600
PLD1
AC Four.1
Basscube
ADS 334is comps installed in the kicks BP @ 400hz - mid, HP @ 3200kHz - tweeters (i think)
Kicker RMB8 installed in the front doors LP @ 400hz
All filtering is done passively
0 awg power reduced to 8 awg (M25) and 4 awg (600ti)
No subs, amps ran full range
The M25 was installed in my car for about 2 weeks and the 600ti is currently installed at the moment.
Both amps gains and bass boost are fully counterclockwise
Four.1 and HU's EQ set to flat
Radio volume set at ~55/80
Music of choice - alternative, classic rock, 80's rock, pop and adult contemporary.
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The first thing I noticed that the M25 plays louder
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One weird thing is that for the M25, I had to flip the RCA's, b/c there was something wacky: the left and right was flipped for some reason (probably flipped internal speaker wires)
With the M25 I could crank the basscube all I want and the bass gets louder and louder and with no signs of cone break-up or physical distortion. As for the 600ti, cranking the basscube 2/3 increases bass, but it does not play low like the M25...not even close!
Keep in mind, I didn't touch the eq.
The vocals of the M25 sounded much fuller and thicker and seems to handle crappy sounding music. The 600ti on the other hand was a tad bit on the tinny side. Although, it did sound good, its no where near the M25. If I herd the 600ti w/o hearing the M25 first, I would have said it sounded pretty damn good.
On a positive note for the 600ti, is that it stayed cool, but the M25 seemed like it was going burn up
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Here's the most convincing comparison between the two amps: my GF asked me "what happened to your system?" after I installed the 600ti - unbiased opinion
It seems that the 600ti is better suited for making tons of power for subwoofer applications, since it powered my idmax very well at one point. There's no way in hell that the M25 can match up to the 600ti in terms of sheer output in mono or low impedances, but it does a hell of a job running my 3way comps.
It would be pretty hard to convince ANYONE that one amp makes 25w x 2 and the other makes 150w x 2.
So I guess Doc right.
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