G23 Tower Speakers wiring and ohm?

[etang789]

Would like to know how is the G23 tower speakers wired? Serial or Parallel? What would the resistance be?

I think the sensitivity of the amp is turned a bit too high by dealer going to retune it, would be nice to know what stock config be.

[MLA]

The speakers are 4 ohm and I dont think they are paired at all from the factory.

[etang789]

The speakers are 4 ohm and I dont think they are paired at all from the factory.

Thanks! checked the wiring just now, the dealer installed without having them bridged on the JL M800/8v2 . I have corrected the wiring, but seems like the headunit pre-amp signal is very weak and I can't get the voltage up to the JL required 28.3V when using 1k test tone according to their manual ( http://mediacdn.jlaudio.com/media/mf...pdf?1502729029 )

[MLA]

Amp should still make rated power. Input range is from 200mv to 8V. 200mv is like ipod head phone level. id double check the input level switch.

[David Analog]

Hopefully you have temporarily disconnected the speakers while setting the gains with this method. Could be a problem getting the output voltage up to spec if you don't have adequate supply voltage to the amplifier (12.5 volt minimum), or without populating all amplifier RCA inputs, or having the input configuration wrong. JL Audio makes a 7 volt line driver, which should not be required to get full output voltage, but could improve the performance.

[etang789]

Amp should still make rated power. Input range is from 200mv to 8V. 200mv is like ipod head phone level. id double check the input level switch.

Yea checked the input level switch its correct.

Hopefully you have temporarily disconnected the speakers while setting the gains with this method. Could be a problem getting the output voltage up to spec if you don't have adequate supply voltage to the amplifier (12.5 volt minimum), or without populating all amplifier RCA inputs, or having the input configuration wrong. JL Audio makes a 7 volt line driver, which should not be required to get full output voltage, but could improve the performance.

Yea all the speakers were disconnected. And the other amp wasn't powered on.

Yea the engine wasn't on and the battery is a little low since I forgot to turn off the battery switch for a few days, it is at 12.4v when I did the gain settings. Will try again, may be it also affected the headunit pre-amp output as well.

Main reason I'm playing with the setting is because there is some slight noise to the sound system. Will check the RCA, may be the dealer did something when they zip tied new RCA cable.

[distinguishedmotorsports]

with out nominal voltage (14.7V) you will likely have a hard time hitting recommended AC voltage for the amp, especially if the channels are bridged.

factory wiring on most all boat mid 00s up to mid teens are 4 ohm tower and rear two sides of boat are in parallel at 2 ohms.

[David Analog]

with out nominal voltage (14.7V) you will likely have a hard time hitting recommended AC voltage for the amp, especially if the channels are bridged.

^^^ Not at all true, not in my experience, not in testing that I have done, and not per the following test review where the JL Audio amplifier delivered full rated 14.4v power with a lower 12.6v supply. JL Audio takes this into consideration knowing that nearly all systems are tuned with the car, truck, SUV, or boat, not running. http://pasmag.com/car-audio/reports/...lifier-review-

[distinguishedmotorsports]

^^^ Not at all true, not in my experience, not in testing that I have done, and not per the following test review where the JL Audio amplifier delivered full rated 14.4v power with a lower 12.6v supply. JL Audio takes this into consideration knowing that nearly all systems are tuned with the car, truck, SUV, or boat, not running. http://pasmag.com/car-audio/reports/...lifier-review-

i though he was complaining about low voltage RCA signal from the head unit. my mistake.


OP, half the people with newer boats complain of noise in the system.

[etang789]

i though he was complaining about low voltage RCA signal from the head unit. my mistake.


OP, half the people with newer boats complain of noise in the system.

I am complaining about the noise in the system, I think it is caused by the low pre-amp voltage output. the amp gain needed to be turned up so high to meet with the rated output. Or in my case it doesn't meet the rated numbers.

[David Analog]

I am complaining about the noise in the system, I think it is caused by the low pre-amp voltage output. the amp gain needed to be turned up so high to meet with the rated output. Or in my case it doesn't meet the rated numbers.

Something is amiss. The rated voltage is just to set the amplifier at full pre-clipping power at a pre-tested and known level. However, the amplifier should achieve an even higher output voltage with no load (other than a meter) and no current demand.

[etang789]

^^^ Not at all true, not in my experience, not in testing that I have done, and not per the following test review where the JL Audio amplifier delivered full rated 14.4v power with a lower 12.6v supply. JL Audio takes this into consideration knowing that nearly all systems are tuned with the car, truck, SUV, or boat, not running. http://pasmag.com/car-audio/reports/...lifier-review-

Today I tried tuning the sensitivity gain with the engine running. And voltage was around 14.2v , but I still cannot reach the 28.3v with headunit volume 38/40 .

Something is amiss. The rated voltage is just to set the amplifier at full pre-clipping power at a pre-tested and known level. However, the amplifier should achieve an even higher output voltage with no load (other than a meter) and no current demand.

Seems like I'm having a hard time to reach the rated voltage when bridged.

[MLA]

post a pic of the RCA connections at the amp.

[etang789]

post a pic of the RCA connections at the amp.

These pictures were taken before I have made any adjustments to anything and corrected the tower speakers were wired without being bridged.

[MLA]

Need to read post #5 from David. He nails it as usual.