AUDIOPIPE S/N 70? is that BAD?

[XORstatus 10+ year member]

Im trying to find amps that are 1 ohm stable and 1500 to 2000w

AUDIOPIPE was suggested to me so I have done some research I have found that they seem to do what they are rated, BUT the sound to noise ratio is REALLY LOW like 70.

IS THIS BAD?

ESPECIALLY when im puttiing it on a memphis mojo 15 which has close 93 s/n

Click to read more...

 

[dipitydoo 10+ year member]

won't be audible from your subs.

 

[Kangaroux 5,000+ posts]

Sound-to-noise ratio really only matters on your mids and highs. A low S/N will be audible on your speakers because you will hear some slight white noise when nothing is playing but for subs you won't really hear anything

 

[XORstatus 10+ year member]

SOUNDS GOOD.

Will this amp complement my MOJO nicely?

on my 12-13v system how many true watts will the AP produce?

HOW MANY BEFORE CLIPPING?

 

[VWBobby 10+ year member]

A low S/N will be audible on your speakers because you will hear some slight white noise when nothing is playing but for subs you won't really hear anything

Not exactly. You are confusing Noise Floor with S/N Ratio.

Signal - Noise ratio is the amount of amplified signal to the amount of noise that is amplified. If you had a theoretical perfect 100% signal to noise ratio, you would have no noise. Since the AP is at 70, that means roughly 30% of the amplified signal is noise... //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

Signal To Noise Ratio

Signal-To-Noise Ratio (S/N) - Definition and Explanation of Signal-To-Noise Ratio (S/N)

Realistically, most people do not notice or do not care. Bass is bass, to them. However, if you have high quality "SQ" type subs (as opposed to SPL applications), then you would benefit from a higher quality amp. If all you care about is max output, then it doesn't matter what amp you use.

Granted, S/N ratio is more important above 100hz, but don't forget that having a 100-500 watts of unwanted "noise" (at full tilt) is not desirable either in subwoofer applications.

 

[Kangaroux 5,000+ posts]

Not exactly. You are confusing Noise Floor with S/N Ratio.
Signal - Noise ratio is the amount of amplified signal to the amount of noise that is amplified. If you had a theoretical perfect 100% signal to noise ratio, you would have no noise. Since the AP is at 70, that means roughly 30% of the amplified signal is noise... //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

Signal To Noise Ratio

Signal-To-Noise Ratio (S/N) - Definition and Explanation of Signal-To-Noise Ratio (S/N)

Realistically, most people do not notice or do not care. Bass is bass, to them. However, if you have high quality "SQ" type subs (as opposed to SPL applications), then you would benefit from a higher quality amp. If all you care about is max output, then it doesn't matter what amp you use.

Granted, S/N ratio is more important above 100hz, but don't forget that having a 50-100 watts of unwanted "noise" is not desirable either in subwoofer applications.

It's not really a percentage, some headunits are rated around 110 iirc. S/N is rated in terms of decibels.

 

---------- Post added at 07:37 PM ---------- Previous post was at 07:36 PM ----------

 

Not exactly. You are confusing Noise Floor with S/N Ratio.
Signal - Noise ratio is the amount of amplified signal to the amount of noise that is amplified. If you had a theoretical perfect 100% signal to noise ratio, you would have no noise. Since the AP is at 70, that means roughly 30% of the amplified signal is noise... //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

Signal To Noise Ratio

Signal-To-Noise Ratio (S/N) - Definition and Explanation of Signal-To-Noise Ratio (S/N)

Realistically, most people do not notice or do not care. Bass is bass, to them. However, if you have high quality "SQ" type subs (as opposed to SPL applications), then you would benefit from a higher quality amp. If all you care about is max output, then it doesn't matter what amp you use.

Granted, S/N ratio is more important above 100hz, but don't forget that having a 50-100 watts of unwanted "noise" is not desirable either in subwoofer applications.

It's not really a percentage, some headunits are rated around 110 iirc. S/N is rated in terms of decibels.

 

[XORstatus 10+ year member]

OK now IM confused.

is the AP 1500D gonna have 300w or so dead noise?

THIS SOUNDS BAD!!!!!

or maybe Im misunderstanding.

 

[Kangaroux 5,000+ posts]

OK now IM confused.
is the AP 1500D gonna have 300w or so dead noise?

THIS SOUNDS BAD!!!!!

or maybe Im misunderstanding.

You don't lose power, there is just noise that's introduced into the music. But since a sub can't really play the frequencies that this noise occurs at it's nothing to worry about.

 

[XORstatus 10+ year member]

Ok thank you for the clarification. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[MisterDeadeye 10+ year member]

Ratios are pretty similar to percentages. There's a lot of incorrect info in the post I liked, even though he linked to Wiki.... Not sure why I liked it.

Anyway, the signal to noise is the ratio of signal to background noise. In the AP, the ratio is 70:1. Since Watts are a measurement of power, its like saying for every 70W of signal, you get 1W of bad noise.

 

[Kangaroux 5,000+ posts]

Multiply that by 1500w and you get ~21w of unwanted noise.

 

[Buck 5,000+ posts]

Multiply that by 1500w and you get ~21w of unwanted noise.

Watch out //content.invisioncic.com/y282845/emoticons/uhoh.gif.c07307dd22ee7e63e22fc8e9c614d1fd.gif

 

[Papermaker85 5,000+ posts]

3kw is way to much for a stock system..

The mojo can handle a solid 2kw..

If you want a budget based amp Look into the lanzar opti 1900

 

---------- Post added at 09:03 PM ---------- Previous post was at 09:02 PM ----------

 

The noise is amplified it will be heard..

 

[Bassin Buick]

i dont know if it will or will not be audible but here is a comparison. cheap terrible jensen HU has around 90 s/n ratio , my denon home cassette deck has a 70 s/n ratio when using dolby C noise reduction. So your amps signal to noise ratio is comparable to a high end cassette player and nowhere near a cheap POS cd player. LOL

 

[akheathen Premium Member]

well, lets not mix or confuse a direct correlation of watts of noise per watts of output. it's basically a correlation of how much power supply "noise" will reac, or be dampened vs. the signal that you are feeding it. lets take something common, like alternator whine. to make things simple, say we are running right off the alternator with no batteries, caps, or other dampening entities. now, alternators have an ac ripple because they are ac generators rectified to dc through diodes, and you end up with spikes. again, to make the numbers looks simple, and because it is close to typical, iirc, we will say that the ripple is +/- 35mv from the mean/average output you are seeing as a constant dc voltage. so what that means, is that the 12vdc is carrying a 70mvac signal with it. so where does that come into play and apply to your s/n ratio? what this means, is that that 70mvac signal is being picked up by your audio circuit somewhere between the inputs and the speaker terminal at a ratio of 70:1 essentially, in this case, then you are playing 1mv of alternator whine/ripple, or "noise" to the speaker, regardless of the wattage being played, and you only hear it at real low volumes with your head next to it, typically. and, again, that is only if the noise is there. batteries, and such dampen the effect, and it does not include anything with the signal before the amp, such as something being picked up by the rcas, whether em field from power wires, or generated by ground traveling across the rca shield, or other noise that youp may be feeding into the rca jacks. now, if you have a better ratio, like say 105:1 on the same example setup, then you will only be playing .66mv at the speakers, instead of the 1mv @ 70:1........ hope this makes sense