From the looks of it, you had that line driver cranked way too high causing the amp to draw more current then it could handle. Turn the gain on the amp one click on and adjust the line driver from there. With type-r 10's, you should be good abour 80-90hz or so. I ran a system very similar except I had Type-R 12's (@ 1ohm) and had an amp for each sub, 500watts RMS per sub. I had a Matrix Line driver and an alpine cda-9855 (only deck with a 5 band parametric EQ, time correction, and active crossover aside from the iva-d310.
PM me if you want any advice...
I am curious as to why you would follow that line of tuning. You should match the gain on the amp to the signal that it is receiving.
I am curious as to why you would follow that line of tuning. You should match the gain on the amp to the signal that it is receiving.
running the amps output lower and increasing the input (as long as it can take it) reduces the overall THD. If you read the fine print on an amps THD being under .001%, that is under ideal conditions. The higher the output, the more you're amplifying the noise and distortion.
I ran 2 MRD-M605's (one per sub @ 1ohm) and used a Matrix line driver to boost the decks RCA output from 4v to almost 12. I also used a relay to bring clean power to the deck from the battery instead of using the cars power. I had (4) 4ga. wires coming through the firewall (3 power, 1 ground) and double shielded directional gold tipped monster cables. All wires length matched and a set of image dynamic horns mounted under the dash.
the gain has nothing to do with the output. an amp will only produce so much power no matter what the input is, you are just amping the input signal. unless your amp has a specific input range of 12v and down when you "Turn the gain on the amp one click on and adjust the line driver from there" you will not be setting things up properly and to tell someone else to do it this way was not good information.
how does a relay provide cleaner power than the car does? doesn't the relay get it's power from the car? why 3 runs of power and only 1 ground?
The output is DIRECTLY proportional to the input when referring to gain. That is the basic definition of gain. I've been tuning amplifiers the same way for over 10 years, many of which have made it to international shows. I was actually trained for four years by an IASCA world class pro sound judge on sound, installation, and acoustical engineering. I guess it really depends on how you want your system to sound...
Contrary to popular belief, an amplifiers gain control does not determine the maximum power that an amplifier can produce. As long as the preamp/drive signal has sufficient level, the amplifier will produce its maximum power output level. The gain controls are used to match the amplifer's gain to the gain of the other amplifiers in the system (in the case of a multi-amp system). The gain controls also allow you to match the amplifier(s) to the head unit. Not all head units have the same maximum preamp output voltage. Some head units are capable of producing 9 vrms out while others are only capable of 1.5 vrms out.
the gain has nothing to do with the output. an amp will only produce so much power no matter what the input is, you are just amping the input signal. unless your amp has a specific input range of 12v and down when you "Turn the gain on the amp one click on and adjust the line driver from there" you will not be setting things up properly and to tell someone else to do it this way was not good information.
how does a relay provide cleaner power than the car does? doesn't the relay get it's power from the car? why 3 runs of power and only 1 ground?
Contrary to popular belief, an amplifiers gain control does not determine the maximum power that an amplifier can produce. As long as the preamp/drive signal has sufficient level, the amplifier will produce its maximum power output level. The gain controls are used to match the amplifer's gain to the gain of the other amplifiers in the system (in the case of a multi-amp system). The gain controls also allow you to match the amplifier(s) to the head unit. Not all head units have the same maximum preamp output voltage. Some head units are capable of producing 9 vrms out while others are only capable of 1.5 vrms out.
i find it utterly amazing how many people "used to compete" or are former judges or have some other unverifiable means of expertise in the world of mobile audio. ahh the power of the internet.
Read. Nowhere did I ever say anything about it determing the MAX output of the amp. Your response and website is completely irrelevant to what we are talking about. Again, I say. The OUTPUT of an amplifier is DIRECTLY proportional to the INPUT. This is known as GAIN. You began with, gain has NOTHING to do with the output. I bolded this above for you where you said it. You then quoted something from a random website that proved your original statement wrong. This was bolded the second time.
What is the definition of amplifier gain? The ratio of an output signal's amplitude divided by the input signal's amplitude. Amplifier gain measures the degree to which a signal has been strengthened.
The other thread had started an interesting discussion about an important topic, since very little people know the true meaning behind amplifier gain. I moved those posts over to this thread (and cleaned them up) to continue the discussion. I'm going to add some input into this topic, but to be honest, most of this stuff is way over my head. Please, feel free to engage in conversation, but keep it friendly.
Quote: Originally Posted by STUDLEE
What is the definition of amplifier gain? The ratio of an output signal's amplitude divided by the input signal's amplitude. Amplifier gain measures the degree to which a signal has been strengthened.
Just like Studlee said, here is the true definition of gain in terms of a mathematical formula (A is Gain). Don't mind the example, I didn't feel like cropping to use it.:
Quote: Originally Posted by nineball
Contrary to popular belief, an amplifiers gain control does not determine the maximum power that an amplifier can produce. As long as the preamp/drive signal has sufficient level, the amplifier will produce its maximum power output level. The gain controls are used to match the amplifer's gain to the gain of the other amplifiers in the system (in the case of a multi-amp system). The gain controls also allow you to match the amplifier(s) to the head unit. Not all head units have the same maximum preamp output voltage. Some head units are capable of producing 9 vrms out while others are only capable of 1.5 vrms out.
This is also correct, but like Studlee said it's not referring to the same thing he was talking about. Nineball, I believe you are referring to the following FALSE "popular belief": The more you turn up the gain the more power you are recieving. 1/4 gain 300w, 1/2 gain 600w, 3/4gain 900w, Full gain 1200w.
no, what i was not agreeing with is the method used to set the amp. he said "Turn the gain on the amp one click on and adjust the line driver from there" which is bad information to give the average user on here. i am willing to bet that less than 3 people on here use a line driver let alone even know what one is, so this is useless and does nothing to help them correctly set the gain.
actually I was arguing the statement you made when you said
Quote: Originally Posted by nineball
the gain has nothing to do with the output.
In case you are wondering where I am getting my knowledge of amplifiers, aside from my 10 years mobile electronics experience and MECP Certification, I am an RF technician for the USAF (Civilian Contractor). Amplifier and Gain are my job. This along with Loss, deviation, peak power out, Pulse width, sensativity, pulse repetition, and anything else related to RF at any frequency on both the transmit and recieve side. Add that to my degree in Electronics with emphasis on Space Technology and I can honestly say I know a thing or two about Amps and gain.
Okay, obviously the fight just continued from the other thread. Gonna lock her up since we can't have a civilized conversation. Honestly I expected a little better of both of you.
I see no reason to lock this thread. There was nothing that broke the rules, no personal attacks, and if someone wants to add their input, it cannot be done with the thread locked. The thread has been unlocked!
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Gain Discussion
Linear Mode
