AMP
3rd Gear Member
Joined: Sep 2005
Posts: 600
From: CA
RE: AMP
Bigwille, about the first problem. You say the speakers don't sound great? Did you install it? or did a professional? either way, I would check that the correct polarity on all the speakers were done right. If any of them are reversed, they will sound like crap.
3rd Gear Member
Joined: Aug 2005
Posts: 984
From:
RE: AMP
ORIGINAL: techmanBDsStang
OK you 115 db Signal to Noise ratio means nothing without what power is was rated at.
It isn't 1% it is < 1%. Any THDN that is <1% is not audible to the ear.
so what amp was it? what rated power was it tested at for S/N level?
ORIGINAL: pj1010
I don't consider a S/N ration of below 81 dB "great." In fact, it is terrible. 1% THD - probably one of the worst 4 channel amps I've seen. I believe my last amp was 200x4 at .002% distortion and 115 dB.
The kicker there is the distrotion level...1% is HUGE. I would not recommend that amplifier...at all.
I don't consider a S/N ration of below 81 dB "great." In fact, it is terrible. 1% THD - probably one of the worst 4 channel amps I've seen. I believe my last amp was 200x4 at .002% distortion and 115 dB.
The kicker there is the distrotion level...1% is HUGE. I would not recommend that amplifier...at all.
It isn't 1% it is < 1%. Any THDN that is <1% is not audible to the ear.
so what amp was it? what rated power was it tested at for S/N level?
The amp was rated at 100x4 @ 115 dB (4 ohms/channel).
3rd Gear Member
Joined: Aug 2005
Posts: 984
From:
RE: AMP
ORIGINAL: techmanBDsStang
So that 115 dB is the s/n ratio? what did they test that at?
@full power? 1watt power?
What brand amp was it?
So that 115 dB is the s/n ratio? what did they test that at?
@full power? 1watt power?
What brand amp was it?
3rd Gear Member
Joined: Sep 2005
Posts: 600
From: CA
RE: AMP
Ok then you don't want to answer my question. FIRST of all I am a reliability lab engineer for car amps. I do know what I am talking about.
This is why I was asking you these questions. Most likely what most amp companies do is give you a s/n ratio tested at full power where as the Infinity system is tested at 1watt. SO we need to bring it to apples and apples.
what was the power of the amp? around 800 watts?
db= 10*log(800/1)
db = 29
115 - 29 = 86 db S/N ratio from a $1000 amp. You are getting 81db S/N ratio from a $300 amp. You definatly will not here a difference at all with 5 db above.
This is why I was asking you these questions. Most likely what most amp companies do is give you a s/n ratio tested at full power where as the Infinity system is tested at 1watt. SO we need to bring it to apples and apples.
what was the power of the amp? around 800 watts?
db= 10*log(800/1)
db = 29
115 - 29 = 86 db S/N ratio from a $1000 amp. You are getting 81db S/N ratio from a $300 amp. You definatly will not here a difference at all with 5 db above.
Thread Starter
2nd Gear Member
Joined: Oct 2005
Posts: 381
From: Englishtown, NJ
RE: AMP
ORIGINAL: techmanBDsStang
Bigwille, about the first problem. You say the speakers don't sound great? Did you install it? or did a professional? either way, I would check that the correct polarity on all the speakers were done right. If any of them are reversed, they will sound like crap.
Bigwille, about the first problem. You say the speakers don't sound great? Did you install it? or did a professional? either way, I would check that the correct polarity on all the speakers were done right. If any of them are reversed, they will sound like crap.
ebay store is giving me the amp+3 year warranty+install kit for $300everything else is warrantied at circuit city so i can blow em and get the new model as many times as i want
3rd Gear Member
Joined: Aug 2005
Posts: 984
From:
RE: AMP
ORIGINAL: techmanBDsStang
Ok then you don't want to answer my question. FIRST of all I am a reliability lab engineer for car amps. I do know what I am talking about.
This is why I was asking you these questions. Most likely what most amp companies do is give you a s/n ratio tested at full power where as the Infinity system is tested at 1watt. SO we need to bring it to apples and apples.
what was the power of the amp? around 800 watts?
db= 10*log(800/1)
db = 29
115 - 29 = 86 db S/N ratio from a $1000 amp. You are getting 81db S/N ratio from a $300 amp. You definatly will not here a difference at all with 5 db above.
Ok then you don't want to answer my question. FIRST of all I am a reliability lab engineer for car amps. I do know what I am talking about.
This is why I was asking you these questions. Most likely what most amp companies do is give you a s/n ratio tested at full power where as the Infinity system is tested at 1watt. SO we need to bring it to apples and apples.
what was the power of the amp? around 800 watts?
db= 10*log(800/1)
db = 29
115 - 29 = 86 db S/N ratio from a $1000 amp. You are getting 81db S/N ratio from a $300 amp. You definatly will not here a difference at all with 5 db above.
Thread Starter
2nd Gear Member
Joined: Oct 2005
Posts: 381
From: Englishtown, NJ
RE: AMP
ORIGINAL: pj1010
First and foremost, you are making assumptions at this point.
First and foremost, you are making assumptions at this point.
3rd Gear Member
Joined: Aug 2005
Posts: 984
From:
RE: AMP
ORIGINAL: bigwille
hes just got a lil sand in his vagina.. he argues in every1's post considering there all stupid compared to him
ORIGINAL: pj1010
First and foremost, you are making assumptions at this point.
First and foremost, you are making assumptions at this point.
What evidence does he have that those ratings are at full power? He's making assumptions that are going to benefit his argument. I will be the first to admit I was "assuming" we were speaking on a level playing field, in that each company practiced equal QA. All I can do is "assume" (yet again) that specs posted on a particular site will be of equal weight. I cannot attempt to guess at PPI's tactics, thus I cannot refute his statement, much like he cannot make said statement with 100% validity.