New Nav install w problems

kenchan · 12-10-2013, 04:09 PM

did the installer use speaker to line level converters? is that wats causing the hissing?

the 850BT has only 2v or 2.5v preouts, not enough for the bose inputs i dont think.

SouthArk370Z · 12-10-2013, 04:21 PM

Ground problems are usually accompanied by "buzzing" or feedback, not hiss. Hiss is usually a sign of noisy electronics or gain set too high. I'd check for: Gain too high on amp / gain too low on pre-amp or a noisy amp and/or pre-amp.

bigaudiofanat · 12-10-2013, 05:26 PM

Quote:

Originally Posted by SouthArk370Z

Ground problems are usually accompanied by "buzzing" or feedback, not hiss. Hiss is usually a sign of noisy electronics or gain set too high. I'd check for: Gain too high on amp / gain too low on pre-amp or a noisy amp and/or pre-amp.

Can't change the gain on the bose head amp.

bigaudiofanat · 12-10-2013, 05:26 PM

Quote:

Originally Posted by kenchan

did the installer use speaker to line level converters? is that wats causing the hissing?

the 850BT has only 2v or 2.5v preouts, not enough for the bose inputs i dont think.

Yep you nailed it on the head! Bose wants at least 4 volts being fed to it otherwise it can cause problems.

12-10-2013, 04:21 PM	#2 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	Ground problems are usually accompanied by "buzzing" or feedback, not hiss. Hiss is usually a sign of noisy electronics or gain set too high. I'd check for: Gain too high on amp / gain too low on pre-amp or a noisy amp and/or pre-amp. Rectorna likes this. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

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12-10-2013, 04:09 PM	#1 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	did the installer use speaker to line level converters? is that wats causing the hissing? the 850BT has only 2v or 2.5v preouts, not enough for the bose inputs i dont think.