mbq raa1000 or raa2400 for 12" avalanche

[billybrown66 10+ year member]

ive decided to go with the mb quart reference line of amps for my system. an raa 4200 for my components and rear and either an raa1000 or 2400 for my 12" avalanche. here are the specs:

raa1000 -

Dimensions (W x D x H): 11 in x 15.7 in x 2.3 in

Amplifier Type: Amplifier 1-channel

Response Bandwidth: 10 - 250 Hz

Amplifier Output Details: 1000 Watt - 1 Ohm - THD 1.0% - 14.4V DC - 1 channel(s)

500 Watt - 2 Ohm - THD 1.0% - 14.4V DC - 1 channel(s)

250 Watt - 4 Ohm - THD 1.0% - 14.4V DC - 1 channel(s)

Manufacturer Warranty: Limited warranty - 1 year

Audio Performance

Response Bandwidth: 10 - 250 Hz

Signal-To-Noise Ratio: 85 dB

Continuous Power / Channel Qty: 250 Watts x 1

Amplifier Output: 1-channel

Input Signal Voltage: 0.15 - 8V

Crossover: Active crossover

Crossover Slope: 12 dB/octave

Low Pass Frequencies: 50 - 250 Hz

Total Harmonic Distortion: 0.01

Output Power (total): 1000 Watt

Additional Features: Subsonic filter

Amplifier Output Details: 1000 Watt - 1 Ohm - THD 1.0% - 14.4V DC - 1 channel(s)

500 Watt - 2 Ohm - THD 1.0% - 14.4V DC - 1 channel(s)

250 Watt - 4 Ohm - THD 1.0% - 14.4V DC - 1 channel(s)

raa 2400 -

Dimensions (W x D x H): 11 in x 15.7 in x 2.3 in

Amplifier Type: 2-channel

Response Bandwidth: 10 - 40000 Hz

Amplifier Output Details: 400 Watt - 2 Ohm - THD 0.5% - 14.4V DC - 2 channel(s)

200 Watt - 4 Ohm - 14.4V DC - 2 channel(s)

800 Watt - 4 Ohm - 14.4V DC - 1 channel(s)

Manufacturer Warranty: Limited warranty - 1 year

Audio Performance

Response Bandwidth: 10 - 40000 Hz

Signal-To-Noise Ratio: 95 dB

Continuous Power / Channel Qty: 200 Watts x 2

Amplifier Output: 2-channel

Input Signal Voltage: 0.15 - 8V

Crossover Slope: 12 dB/octave

Low Pass Frequencies: 50 - 500 Hz, 500 - 5000 Hz

High Pass Frequencies: 50 - 500 Hz, 500 - 5000 Hz

Total Harmonic Distortion: 0.005

Output Power (total): 800 Watt

Additional Features: Input level controls

Amplifier Output Details: 400 Watt - 2 Ohm - THD 0.5% - 14.4V DC - 2 channel(s)

200 Watt - 4 Ohm - 14.4V DC - 2 channel(s)

800 Watt - 4 Ohm - 14.4V DC - 1 channel(s)

the box for my sub would be sealed at the proper alignment (.707), so i figure i could either bridge the raa2400 into 4ohm's which would give me 800 watts running to the sub or just run the ra1000 at 1ohm and get 1000 watts. also, does anyone know about the efficiency of these amps, ive read some reviews but havent heard anything about how much power they draw.

edit: since the avalanche is a 4ohm sub, would there be any benefit from running the 2400?

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[billybrown66 10+ year member]

anyone? i dont want to sound pushy, but i want to buy one of these asap.

 

[3.5Max6spd 10+ year member]

i say the raa2400....you could always use it as a fronstage or mid amp in the future

Bridged it pounds real nice as well, packs a nice punch

 

[billybrown66 10+ year member]

3.5, youre my only friend.

 

[HiAmplidude 10+ year member]

I have a 4200, and had another 4200 driving a pair of 10"s, then replaced that with the Class D 1000 and pushed a pair of 12"s with it. The subwoofer-focussed features of the 1000 and the Class D efficiency makes the RAA1000 a no-brainer, for me, at least.

3.5Max6spd has a good point, though, that the 2400 can be used for front components later if you decide to go that route some day, and the 1000 can only be used for subwoofers. Plus, the 2400 does push some very clean, very forceful power. You just miss out on some of the stuff that is really nice to have on a sub amp like variable frequency boost and a variable Q level to widen or shorten the range of boost at that frequency, variable phase adjust, wired remote to the dash with 2 controls, etc. etc.

 

[billybrown66 10+ year member]

thanks hi, i guess what im most concerned with is sq and power, however, although i am learning i do not completley understand the technical factors behind each amp. would one amp make the sub sound better?

 

[iagrdshaka 5,000+ posts]

thanks hi, i guess what im most concerned with is sq and power, however, although i am learning i do not completley understand the technical factors behind each sub. would one amp make the sub sound better?

only if one amp had more power than the other.

 

[billybrown66 10+ year member]

so the 1000 would have cleaner power?

 

[HiAmplidude 10+ year member]

No. The 1000 has MORE power, not necessarily "cleaner"; it's class D which is generally not as nice a sound quality in the mid to high frequencies (although some companies have produced audiophile quality digital full-range amps). At the subwoofer range, your ear can't really perceive the difference, so class D is the way to go if you want to save some juice on your charging system. class D is generally a LOT more efficient than class A/B (RAA2400) at average listening levels.

 

[billybrown66 10+ year member]

so if i ran the 2400 and 4200 on the same setup, would i probably need to upgrade my battery and alternator?

i have a jeep grand cherokee limited

 

[HiAmplidude 10+ year member]

so if i ran the 2400 and 4200 on the same setup, would i probably need to upgrade my battery and alternator?
i have a jeep grand cherokee limited

I doubt that, actually. Unless you plan to be at ear-damaging volume levels all the time. Hit the MB Quart forums. The MBQ tech's swear that most of their Reference amps are designed to be run and even paired up on a stock charging system (personally, I don't get the generalization, but find it interesting nonetheless). What you will probably need, though, is some attention to your cabling. Current flows in a complete loop, so if your + side is [trying to] pumping enough current to throttle a 2 Awg cable back to the amps, in order for it to do so, you need to have at least that amount of return on the - side (run an additional large gauge negative to chassis from the battery - terminal, or more, at the very least).

Look up "the big 3" on these forums. It's good advice.