I put a new head unit and a couple of amps in one of my cars recently. They didn't have the head unit I wanted, but had something similar so I took it. Well, after getting everything in I wasn't too pleased with the amount of bass from the sub. That is when I discovered the head unit I am using only has a 2v rms preout, while the unit I originally was going to use has a 4v rms pre out.
So, is there a pre amp of any sort I can use in this car to boost the pre out signal? Otherwise I will have to get a different amp for the sub.
So, is there a pre amp of any sort I can use in this car to boost the pre out signal? Otherwise I will have to get a different amp for the sub.
Something is wrong, that is less than the signal from turntables.
Is that idle or playing volts?
How did you check?
Check with the specifications, another meter, and get it exchanged if possible.
Or build a pre amp using one of the many circuits available on this forum and other places.
2 mV will be noisy to boost.
Is that idle or playing volts?
How did you check?
Check with the specifications, another meter, and get it exchanged if possible.
Or build a pre amp using one of the many circuits available on this forum and other places.
2 mV will be noisy to boost.
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@NareshBrd: I believe the posted said 2 volts, NOT 2 mV.
Many amps have switched sensitivity input levels, to account for different output levels of the front end units that are on the market. 4 V output is quite high, so I suggest that you may want to check to see if the amps have their input sensitivity switched to low. If so, then change the sensitivity to "normal" or "high."
Many amps have switched sensitivity input levels, to account for different output levels of the front end units that are on the market. 4 V output is quite high, so I suggest that you may want to check to see if the amps have their input sensitivity switched to low. If so, then change the sensitivity to "normal" or "high."
Was the gain on the bass amp set to the most sensitive position?
What are you using for the bass/sub speaker(s)?
What are you using for the bass/sub speaker(s)?
Very much doubt that is your problem.
You are not posting amp, preamp, speakers model, brand, even less datasheets so we are absolutely blind,
That said, I guess 2 or 4 V RMS must be preamp out capability, nothing says that´s the continuous level out, Guessing power amp sensitivity at around 1 V RMS (an Industry standard) both should be more than enough to drive power amp to full power.
I´d rather suspect speakers or the cabinet they are in for your perceived lack of performance.
Or simply you expected too much.
Sorry, been away for a bit.
I have something that should be relatively easy to try, then I'll be back again.
I can easily put this sub in the back seat of my truck since that is what I was trying to "copy" response-wise in that car. Wires are very easy to get to.
It will answer the question if the sub is the problem or the amp and/or the signal feeding the amp.
Yes, the amp gain is set to max.
Yes, the Pioneer head unit feeding that amp can only put out 2 volts RMS.
All my other Pioneer head units put out 4 volts RMS.
Yes, those are the Preout (Line) levels, not speaker-level, they don't even have wires in the harness for speakers, I cut them all off.
I will let you all know what happens, and if it is still no good, then I have my answer. That sub in the Hammer enclosure though does a really good job. But a larger ported enclosure (which will not fit in the car) compared to the smaller sealed enclosure is not a fair comparison.
I have something that should be relatively easy to try, then I'll be back again.
I can easily put this sub in the back seat of my truck since that is what I was trying to "copy" response-wise in that car. Wires are very easy to get to.
It will answer the question if the sub is the problem or the amp and/or the signal feeding the amp.
Yes, the amp gain is set to max.
Yes, the Pioneer head unit feeding that amp can only put out 2 volts RMS.
All my other Pioneer head units put out 4 volts RMS.
Yes, those are the Preout (Line) levels, not speaker-level, they don't even have wires in the harness for speakers, I cut them all off.
I will let you all know what happens, and if it is still no good, then I have my answer. That sub in the Hammer enclosure though does a really good job. But a larger ported enclosure (which will not fit in the car) compared to the smaller sealed enclosure is not a fair comparison.