I have a ton of gift cards to future shop (they replaced a very expensive computer). I would like to get some of my car audio stuff there to try and save as much money as possible.
here are the parts I will be using:
Front doors - Precision Power PC3.65C 3 ohm (per voice coil) component speakers (100w RMS)
Rear Doors - Precision Power PC.52 3 ohm (per voice coil) 2-way coaxial speakers (100w RMS)
I would like to get my amps at future shop, but to get the right sized amp, I need to know what power rating to go by (I know RMS, I mean 2 ohm or 4 ohm)?
The speakers are 3 ohms, and the amps are under powered at 4 ohms (only 50w RMS), but are perfect at 2 ohms (100w RMS), which numer do I go by? Should I run one of those amps per channel or 2? optimally I would love to run the 4 channel version (same ratings but into 4 channels) and put it under the passenger seat.
I am not going for excessive volume, just a good quality sound at a decent volume (99% of the time there will be 2 children in the car, thus the lack of need for excessive volume). I am only concerned about the front speakers, rears are not as important. Obviously I would prefer a better suited amp, but I already have the gift cards, so it's kind of like being free.
The amp I am looking at is an MTX Jackhammer (202 or 404)
Thanks for the help
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I have gained this by philosophy: that I do without being commanded what others do only from fear of the law.
An amplifer's load rating is the LOWEST impedance it can handle. Any load greater than that is fine.
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Support the12volt.comwill the mtx jackahmmer 404 handle those speakers fine? I figure 50w RMS x 4 @ 4 ohms and 100w RMS x 4 @ 2 ohms, those 3 ohm speakers should see around 75w RMS? or am I out to lunch?
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I have gained this by philosophy: that I do without being commanded what others do only from fear of the law.
Don't worry about the power rating you will be fine. Just be sure to set your gain properly.
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Support the12volt.comwell, last night I got carried away looking at a online mobile electronics warehouse, and a couple of 5 channel amps caught my eye:
MBquart ONX4.80/500 $315 shipped ($799 retail)
4 ohms: 60 watts x 4 chan. + 250 watts x 1 chan.
2 ohms: 120 watts x 4 chan. + 375 watts x 1 chan.
1 ohm: 500 watts x 1 chan. (5th Channel Only)
| Amplifier Class |
AB |
| Number of Channels |
5 |
| RMS Power (4 ohms) |
60 watts x 4 chan. + 250 watts x 1 chan. |
| RMS Power (2 ohms) |
120 watts x 4 chan. + 375 watts x 1 chan. |
| RMS Power (1 ohm) |
500 watts x 1 chan. (5th Channel Only) |
| Bridged RMS Power |
240 watts x 2 channels |
| Total RMS Power Output |
980 watts |
| Peak Power Output |
N/A |
| Total Peak Power Output |
N/A |
| Maximum Input Gauge Size |
2 |
| Minimum Impedance Unbridged |
1 ohms |
| Minimum Impedance Bridged |
4 Ohms |
| THD at Rated RMS Power |
0.05% |
| Speaker Level Inputs |
Yes |
| Preamp Outputs |
1 pair |
| Built-in Crossover |
Low-pass (LP), High-pass (HP) |
| High-Pass Crossover Frequency |
10 - 15,000 Hz |
| Low-Pass Crossover Frequency |
30 - 150 Hz |
| Subsonic Filter |
N/A |
| Signal-to-Noise Ratio |
>92 dB |
| Channel Separation |
>80 dB |
| Bass Boost |
0 - 10 dB |
| Bass/Gain Remote |
Yes |
Cadence ZRS-C8 $320 shipped ($599 retail)
4-ohm RMS Power: 150W x 4 + 400W x 1
2-ohm RMS Power: 200W x 4 + 600W x 1
which would be better suited to me? The MBquart is the better deal money wise, how about sound quality/features wise?
The MB is stable to 1 ohm for the 5th channel, and would run the 1 10" kicker sub I am planning on using perfectly. but the cadence has much higher wattage for the 4 channels?
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I have gained this by philosophy: that I do without being commanded what others do only from fear of the law.
If I go with the Cadence, I can get a deal on a set of 140w rms 6.5/4/1 components.
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I have gained this by philosophy: that I do without being commanded what others do only from fear of the law.
I will have to change subs with the cadence as well, sorry for the extra posts.
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I have gained this by philosophy: that I do without being commanded what others do only from fear of the law.
Hey, the 5 channels are a great way to go if you're trying to run a modest system a car. Sounds like you're trying to be frugal about this and knowing MB Quart more than Cadence, I would go with the MB Quart. Sounds like it will fit your plans and it will feed your interior speakers at 3 ohms rather well.
Also, I've tried to live by a rule of not running more than 800 watts total inside a car that has a stock charging system so if you're not interested in doing those upgrades as well, I'd recommend sticking with the MB Quart.
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Nick C.