 Subaru1-3-2-4Premium
join:2001-05-31
Greenwich, CT | reply to Subaru
Re: Logitech Z-680 Subwoofer to a receiver I wish I could add some type of gain on this I have to crank the receiver to about -16dB to get enough fill in. Music is a little different because I don't need to have it so loud and it fills out well. The other day I did a 18 h 22Hz test for the sub to see how hot the heatsinks got and the side where I replaced the IC chip was 135F not sure what the thermal cut-off was I think it was 75c |
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| hey there, no self conversation anymore 
i followed your topic and also your video on youtube, i'm very interessted in your modification of the z680 subwoofer, because also have such a logitech system and want to use it with an av receiver like you.
but there are still some questions left open (wiring the rca with pcb and also the wiring within the pins of the pcb).
I hope i correctly understood what you did (please correct me if not):
-you connected MUTE AMP and STANDBY AMP with separated wires over a switch with VREGDD?
- you connected RF AMP with the RCA Cable ?
- what you did exactly with the shield ? connected with the ground next to the RF AMP?
- did you already bypass the humble of the woofer?
Hope you can answer my question, that will help me very much, setting up my speakers and the woofer without the annonying pod.
regards
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1 edit | reply to Subaru
double post, nevermind! |
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Subaru1-3-2-4Premium
join:2001-05-31
Greenwich, CT | reply to thexman
said by thexman:hey there, no self conversation anymore
i followed your topic and also your video on youtube, i'm very interessted in your modification of the z680 subwoofer, because also have such a logitech system and want to use it with an av receiver like you.
but there are still some questions left open (wiring the rca with pcb and also the wiring within the pins of the pcb).
I hope i correctly understood what you did (please correct me if not):
-you connected MUTE AMP and STANDBY AMP with separated wires over a switch with VREGDD?
- you connected RF AMP with the RCA Cable ?
- what you did exactly with the shield ? connected with the ground next to the RF AMP?
- did you already bypass the humble of the woofer?
Hope you can answer my question, that will help me very much, setting up my speakers and the woofer without the annonying pod.
regards
yep that's how you wire it to work without the pod with the switch just make sure you don't make a solder bridge because how close the pins are and the single core wire.
For the RCA jack I used a drill but it's better if you have a uni-drill so you can get the right hole size, for the jack since I did not have the normal RCA jack I ripped one out of my Xbox 1 AV connection box that had the optical out. That ended up having a good back of rubber that would mount flush and to mount I used 2 part epoxy and let that set over 5 hours.
making the connection the center wire went to Sub AMP or it could be any of them as long as it says AMP.. the shield, depending on what jack you are going to use will be a wire wrapped around foil or a separate connection if you get a ready to mount type jack, for the ground to shield I think I connected it to signal ground.
And bypassing the humble of the woofer? What's that? You mean hum? I still have hum but I haven't got around to fixing that yet I don't think I'm making a good ground connection with the ground wire I put back.
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It's NOT Ni-kon It's NE-KON!
LG is NOT Lifes Good It's Lucky Goldstar!
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1 edit | reply to Subaru
rca female |
with the "ready to mount type jack" you mean a jack without cables like that on the picture that i attached right?
I am not sure if i should give that modification a try, because I took a closer look on the pcb and the distance between the pins and there's not very much space for untrained soldering 
my actual solution is a direct wiring between the sub pre-out of the amp and the pod input for the different channels which works fine, but requires the pod to be turned on, which is kind of annoying
once again thanks for your detailed reply |
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Subaru1-3-2-4Premium
join:2001-05-31
Greenwich, CT | Yeah pretty much like you posted, now if you have another speaker model that's not a z680 then I don't know what the PCB layout is and if things are labled, I know they started scratching off the model numbers of the chips after mine |
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| reply to thexman
no doubt, its exactly the z680 model not z5500 or one of the newer ones, so labeling and layout positioning should be the same like with your model (even though i bought it in europe  ) |
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Subaru1-3-2-4Premium
join:2001-05-31
Greenwich, CT | ok In that case yes it will look the same, now the one things that are missing is something to increase the gain. In movies this can be a issue, I'm still using the satellite speakers from the Z680 so they are a smaller then the main speakers I will be getting, I ran a auto setup on my Denon and it raised the sub level up to +11.dB
To really get it to fill in you have to run near 0 dB and that's loud! Music it's fine, I'm playing some Celtic music on it now and it fills in fine at -32.5 dB
But like I said this was just something I wanted to try, I don't know if it's possible to add a gain to it it might cause some issues.
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It's NOT Ni-kon It's NE-KON!
LG is NOT Lifes Good It's Lucky Goldstar!
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| Hi,
I have a z680 sub with a control pod that doesn't work so I've been looking for a way to use the sub without the pod. I came across this forum and I used the instructions posted to re-wire the sub. It appears to work, however the sub puts out very little sound. I have it connected to my Yamaha htr-5950 and I set the sub out volume to +10 and yet the sub still puts out minimal volume. I noticed on the video you posted that your sub seems to play appropriately.
What can I do to increase the sub volume so it fills in the music properly?
Is it possible that I'm not using the correct single core wires in the pin pads?
Your assistance is appreciated!
ACP |
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Subaru1-3-2-4Premium
join:2001-05-31
Greenwich, CT | I think in the video I stuck the video camera in or very close to the port so that's not a good test, and yes like I said before the Sub has no gain like a standalone one would so the sub volume is dependent on how loud your receiver is.. My auto EQ set the sub to like +11
Funny thing is music it's not much of an issue and movies I tend to run at -14db so the sub balances it out.. I ran it once at that but running a 10 Hz sound test for 8 min to warm up the new chip and to check to make sure the thermal paste had time to set and check temps.
I'm not too sure if it's possible to get the sub have some type of gain volume setting.
I should do another video this time not right at the port :P
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It's NOT Ni-kon It's NE-KON!
LG is NOT Lifes Good It's Lucky Goldstar!
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