Car audio related topic.

[R3ep3r]

Hi there fellow users. 

I've decided to post here because I didn't see any car audio topic or some threads related to vehicles. 

I am planning to upgrade my vehicle's audio system, already composed of a Sony DSX A200UI headunit and some Sony speakers, 16,5cm(rear) and 13cm(front).

The major upgrade consists in installing an amplifier (2 channel one that will be bridged) and a subwoofer. I already decided which subwoofer will it be. An ALPINE SWT-12S4, 12" subwoofer, 300W RMS, Maximum 1000w(peak probably) that can go from 28 to 25khz(which is awesome) and works on 4 ohms.

Now the thing is, I want an amplifier that will have enough power to output to the subwoofer. 

And now since I am pretty low on budget, I took a look over two amps. One Alpine BBX-T600(2 chan) that only outputs 130w bridged at 4 ohms and a Crunch GPX 500.2 (2 chan) that could output 250w bridged at 4 ohms. The price between this two is exactly the same but I am not pretty sure on how the amps perform. Which one is better and blah-blah because I can't really find proper reviews for them.

Please give me some advice.

[Unimportant]

On 8/25/2017 at 7:11 PM, R3ep3r said:

An ALPINE SWT-12S4, 12" subwoofer, 300W RMS, Maximum 1000w(peak probably) that can go from 28 to 25khz(which is awesome) and works on 4 ohms.

28 - 200 Hz you mean, 25Khz is ultrasonic

 

Both seem too cheap if you want the good stuff. But if you're on a budget:

I'd go for the Alpine amplifier if I had to choose between those two. Alpine is a known, reputable brand and they offer full technical details in the manual - such as it being a class A/B amplifier and having a 50-250Hz low pass filter you need for your sub. 130W is enough for a good base when listening normally to music, but it won't be a boomcar, if that's your aim. At least I'd expect the alpine to effectively deliver that stated power, which you should not assume to be true for lesser known brands, talk is cheap.

The crunch on the other hand seems too cheap (I find them for 70 euros, where the alpine costs double), is a rather unknown brand, and not so forthcoming about technical specifications. I can't find the topology used anywhere for example, but the statement of -3db @ 50khz might indicate the cutoff point of a class D LC filter ? One can only guess.

Seems too cheap for a decent class D, which requires substantial magnetics (on top off the boost-converter magnetics), and high quality PCB layout - altough if it's only for a sub, where some distortion/switching noise is not noticable, you might get away with it.

Considering they're hiding technical details such as topology, are lesser know, might be (probably are) lying about the output power, etc - I'd get the alpine.

[R3ep3r]

2 hours ago, Unimportant said:

28 - 200 Hz you mean, 25Khz is ultrasonic

 

Both seem too cheap if you want the good stuff. But if you're on a budget:

I'd go for the Alpine amplifier if I had to choose between those two. Alpine is a known, reputable brand and they offer full technical details in the manual - such as it being a class A/B amplifier and having a 50-250Hz low pass filter you need for your sub. 130W is enough for a good base when listening normally to music, but it won't be a boomcar, if that's your aim. At least I'd expect the alpine to effectively deliver that stated power, which you should not assume to be true for lesser known brands, talk is cheap.

The crunch on the other hand seems too cheap (I find them for 70 euros, where the alpine costs double), is a rather unknown brand, and not so forthcoming about technical specifications. I can't find the topology used anywhere for example, but the statement of -3db @ 50khz might indicate the cutoff point of a class D LC filter ? One can only guess.

Seems too cheap for a decent class D, which requires substantial magnetics (on top off the boost-converter magnetics), and high quality PCB layout - altough if it's only for a sub, where some distortion/switching noise is not noticable, you might get away with it.

Considering they're hiding technical details such as topology, are lesser know, might be (probably are) lying about the output power, etc - I'd get the alpine.

I will totally go for the Alpine one.