Anybody have any experience with their amps? I can't really find any reviews online.

2/28/2007 12:04:12 PM

Where are you getting it from? A lack of online reviews should be a warning that you should be really careful with what you're getting into. You either getting something shady and crappy, or, in the best case, good, but still unknown.

2/28/2007 1:06:15 PM

^

http://raleigh.craigslist.org/ele/285850821.html

Kole actually has alot of car audio products, I just can't find reviews for anything.

2/28/2007 1:10:47 PM

its $40 look at the fuse ratings... if its got a single 30amp blade fuse on the side... p=IV...

V(~12-14.4) * I (sum total of the fuse ratings) = P the maximum input power it can handle for any prolonged period of time...

Example 14.4v*30amp fuse = 432w

effeciency of the amp (50% {liberal} for AB(normal) 80% for class d)

output power = P(input power) * effeciency...

RMS = Output Power/sqrt(2)/2

432w/2 = 216w*2/sqrt(2) = 305w total RMS...

there are caps in amplifiers to support instantanious outputs... and a well designed amp would limit the rate at which these caps can charge as to not violate its input fusing but I = C*(change in voltage (i.e. how much drop it needs to come back)/ammount of time asigned by the inline resistance charging)... this is a tangent... basically energy can't be created or destroyed, but you can store it over time and distribute it faster at a higher rate (power) so it's possible to have more instantaneous output power than input power but average power remains the same... but in order to sustain an bass notes for a song a good design is needed...

my point in all of that is:

A) I'm bored at work...
B) its only $40, so big deal... don't go out this weekend...
C) with what I just went through you can get a general idea of what the true power of that amp will really look like...

3/1/2007 1:57:31 PM

heh, my math skilz got in my way RMS is multiplied by sqrt(2)/2 not devided....

durrr

finaly number of the example is 152w RMS...

3/1/2007 2:39:33 PM

i think u did it right the first time the rms should be the sqrt of the max. to get the max you have to account for the fact that the fuses will take more current than what they're rated for.
so it should be just 30x14.4= 432* efficiency=total max rms. the amp will probaly do around 350watts AT MOST@ 4 ohms bridged realistically.cheaper than $1/ watt

[Edited on March 1, 2007 at 4:27 PM. Reason : .]

3/1/2007 4:26:52 PM

nah, my revised number is correct... kinda what your saynig minus the end... you forgot to multiply by the efficiency... efficiency is a very important factor as it is ouput/input... BUT like I said instantaneous power can be as high as they rate it as long as the long term average power evens out... problem there lies in the fact that it will hit really hard and then be a lot quiter on the exact same level signal until it is given a chance to recharge its internal caps and recover... this is cyclic... its just moving around energy to suit a purpose... nice amplifiers will make this either extremely linear for SQ purposes, or you could design amps for SPL burps... or you could just have way more capacitance than you need(costs a lot) and the amp would be able to play long times and still recharge itself, but then you run the same risk as above where when it finally does run out of energy it will sag until given the chance to recover... (yay EE)

432*(0.5)*(0.707) = 152w RMS is correct...


[Edited on March 1, 2007 at 4:42 PM. Reason : SQ vs SPL vs NICE]

3/1/2007 4:40:40 PM

so, after reading all this chinese, I'm hearing it probably sux, right?

3/1/2007 4:53:29 PM

you get what you pay for. for 40$ it's not a bad amp(not a great amp either) just don't expect to blow out windows with a $40 amp

[Edited on March 1, 2007 at 4:57 PM. Reason : .]

3/1/2007 4:56:43 PM

$%*()&$ business majors...

what we're saying is that for $40 its worthwhile... but its not going to be the most awesome amp in the world and there is a good possible chance that you will blow it pretty soon if you push it too hard... but overall for $40 bucks what do you have to loose? worst case you have it installed... so should it blow you unhook the battery (spefication simply b/c your a business major) unscrew the wires and hook up the next amp using those wires...

chinese gobaly gook is a specific example that can simply be plugged into for a final result... it was long winded but done so in the hopes that you might actually consider looking at it and realizing there isn't much to figuring it out...

you strengthen the business stereotype... congrats

3/1/2007 7:45:51 PM

Quote :

"what we're saying is that for $40 its worthwhile... but its not going to be the most awesome amp in the world and there is a good possible chance that you will blow it pretty soon if you push it too hard."

I knew that.....you really don't have to have an ece degree to figure that out

I really wanted first hand accounts, not a page of spec breakdowns, that can be found anywhere. Despite what you may think, you're not the only one that can do it.

Quote :

"you strengthen the business stereotype... congrats"

I actually like the "business stereotype" It helps to perpetuate the engineer stereotype.....ask for advice, you get the full technical rundown regardless of if you actually want it or not, then you get to hear the rant: "it's not hard, I'm so smart, stupid (insert non-technical major here) major."

thx.

3/2/2007 11:01:38 AM

Quote :

"you get the full technical rundown regardless of if you actually want it or not, then you get to hear the rant: "it's not hard, I'm so smart, stupid (insert non-technical major here) major." "

Yeah but you just copy and paste the summary and fall back on what you didnt ask for when a customer asks "why".

Dont be a hypocrite.

3/2/2007 1:32:28 PM

^is that supposed to be coherent?

3/2/2007 1:36:29 PM

^

Quote :

"Despite what you may think, you're not the only one that can do it."

3/2/2007 1:44:15 PM

I meant if i needed a spec break down I know several people that could do that for me, not that I could do it myself.

I asked for personal experience and got a spec breakdown.

3/2/2007 1:47:51 PM

wlb420 got hosed

3/2/2007 1:48:24 PM

did i now? I have to say, it's cute how you techies stick up for each other, even if you do just fabricate things

3/2/2007 1:53:12 PM

Quote :

"I know several people that could do that"

3/2/2007 2:09:52 PM

I wanted personal experience with the brand, not a breakdown of the numbers........how hard is that to understand?

[Edited on March 2, 2007 at 2:14 PM. Reason : .]

3/2/2007 2:14:25 PM

It’s $40... big fuckin deal... its an amplifier, its going to perform to a certain ability, and based on they're outrageous power numbers its probably still going to be plenty to run any basic setup... so what I'm saying is by understanding the tech behind it you can rely on something OTHER than hearsay... that whole common sense thing and reasoning thing... You’re asking for personal experience, I'm telling you that it’s possible to make an educated decision without somebody whispering the answer in your ear.

What I keep coming back to is its $40... You’re out of college... and if you fit the business stereo type as well as you seem to, don't buy 4 drinks tonight and you should be able to buy it with the same money...

I said I was bored, so I broke it down, I also planned on using that summary anytime anybody asks a question on a no-name amp in the future... So you’re just the first in a long line of incompetence that will be receiving that reply...

And yes I fit the engineering stereo type splendidly...

[Edited on March 3, 2007 at 11:23 AM. Reason : figuring things out is fun to do for yourself at times...]

3/3/2007 11:19:54 AM

Quote :

"so, after reading all this chinese, I'm hearing it probably sux, right?"

Quote :

"I knew that.....you really don't have to have an ece degree to figure that out "

Seems like you didn't get it until they explained it.

Guess you do need an ECE degree to figure it out.

3/3/2007 11:58:26 AM

does it even have a blade fuse.

Get the amp its not a bad sucker as long as it works. Its not the cheapest of the cheap. and for 40 bux itll do decent for a single sub.

3/3/2007 1:51:44 PM