VGA Audio Cable?

[quarinteen]

Hello I am very very new to this. I am attempting to recycle some old parts and make my own speaker / sub / amp project. I took the board from an old logitech subwoofer speaker set and the audio in comes in the form of a VGA cable. I have never seen this before. Would anyone know where I can find a wire diagram for audio VGA setup? The board is H3255-0D and these are the speakers. Logitech-970123-0403

Also Where can I find information on making a killer box? Please remember I have 0 idea as to what I am doing so I apologize for terminology or my descriptions.

 

[slipperybidness]

Hello I am very very new to this. I am attempting to recycle some old parts and make my own speaker / sub / amp project. I took the board from an old logitech subwoofer speaker set and the audio in comes in the form of a VGA cable. I have never seen this before. Would anyone know where I can find a wire diagram for audio VGA setup? The board is H3255-0D and these are the speakers. Logitech-970123-0403

Also Where can I find information on making a killer box? Please remember I have 0 idea as to what I am doing so I apologize for terminology or my descriptions.

VGA = Video Graphics Array

As such, VGA DOES NOT support audio. So, you are clearly mistaken on exactly what you are looking at, and exactly where the audio channel is coming into the board.

Maybe the connector "looks like a VGA connector" or something????

 

[Swerd]

Was your old Logitech subwoofer part of a speaker system for a desktop computer? https://www.amazon.com/Logitech-2-Piece-Speakers-Ported-Subwoofer/dp/B0002SQ0A4

If you plan on using it's board as part of a "killer" sub woofer meant for a proper audio system, don't bother.

 

[BMXTRIX]

There is very little that Logitech made that would be deemed as 'killer' under any circumstances.

It is something that I've seen before with a D-Sub connection being used in a proprietary format with packaged speaker systems. Often to take audio to/from smaller speakers in the system. Not sure I've seen the main audio board of a computer replaced with a D-Sub connection output which feeds to the main input of a speaker system, but in a world without standards, who is to say.

No, don't count on any published pinout, diagram, or anything else for any old speaker system. It's entirely proprietary and designed around you never losing anything and nothing ever breaking. Then, if it does, you replace it entirely and just throw stuff away. Reusing is the last thing that has been planned for.

You certainly shouldn't need any boards which come with any of that stuff.

 

[slipperybidness]

Hello I am very very new to this. I am attempting to recycle some old parts and make my own speaker / sub / amp project. I took the board from an old logitech subwoofer speaker set and the audio in comes in the form of a VGA cable. I have never seen this before. Would anyone know where I can find a wire diagram for audio VGA setup? The board is H3255-0D and these are the speakers. Logitech-970123-0403

Also Where can I find information on making a killer box? Please remember I have 0 idea as to what I am doing so I apologize for terminology or my descriptions.

What these other guys are telling you is that you are on a fool's errand with your end goals vs. your starting materials.

Furthermore, you don't know what you are doing.

But, if you really want to learn, you have to start somewhere. And, tearing apart and rebuilding old stuff is a good cheap place to start.

Just be aware that the only thing this project may produce is a better knowledge for yourself, you may end up tossing the junk in the trash when you are done.

MOST IMPORTANT--Be safe when working with electricity!

 

[quarinteen]

What these other guys are telling you is that you are on a fool's errand with your end goals vs. your starting materials.

Furthermore, you don't know what you are doing.

But, if you really want to learn, you have to start somewhere. And, tearing apart and rebuilding old stuff is a good cheap place to start.

Just be aware that the only thing this project may produce is a better knowledge for yourself, you may end up tossing the junk in the trash when you are done.

MOST IMPORTANT--Be safe when working with electricity!

I am doing this to educate myself. I have spent 40 bucks so far on this. I am doing it for that purpose. I want to have a better understanding.

 

[quarinteen]

VGA = Video Graphics Array

As such, VGA DOES NOT support audio. So, you are clearly mistaken on exactly what you are looking at, and exactly where the audio channel is coming into the board.

Maybe the connector "looks like a VGA connector" or something????

I swear to you I never ever ever have seen a VGA cable used like this but it for sure is a VGA cable. THus why I am looking for information on pin configuration.

At the end of the day a vga cable is just copper wires and can be used to send any signal you can send down them. I get your confusion though I as well am still confused.

There is very little that Logitech made that would be deemed as 'killer' under any circumstances.

It is something that I've seen before with a D-Sub connection being used in a proprietary format with packaged speaker systems. Often to take audio to/from smaller speakers in the system. Not sure I've seen the main audio board of a computer replaced with a D-Sub connection output which feeds to the main input of a speaker system, but in a world without standards, who is to say.

No, don't count on any published pinout, diagram, or anything else for any old speaker system. It's entirely proprietary and designed around you never losing anything and nothing ever breaking. Then, if it does, you replace it entirely and just throw stuff away. Reusing is the last thing that has been planned for.

You certainly shouldn't need any boards which come with any of that stuff.

how hard would it be to remove the vga connection and soldier on something else?

 

[slipperybidness]

I swear to you I never ever ever have seen a VGA cable used like this but it for sure is a VGA cable. THus why I am looking for information on pin configuration.

At the end of the day a vga cable is just copper wires and can be used to send any signal you can send down them. I get your confusion though I as well am still confused.

how hard would it be to remove the vga connection and soldier on something else?

Clipping off an existing termination and soldering a different connector is trivial work. It can be a little difficult/tedious if the wires are very tiny, but this is very basic and fundamental electronics tech work. The difficult part, as you have found, is identifying the proper signal cables.

I'm trying to help educate you, if it carries audio, then it is not a "VGA" cable.

Now, it may be a "D-sub" termination, which is the typical termination for a VGA cable. Note that this is the language that was used in post 4.

Your best bet at this point is to start posting pics of the connections and boards.

And.....Google is your friend, here is what I see when I search for that PCB
https://www.diyaudio.com/forums/chip-amps/225639-logitech-230-subwoofer-volume-knob-bass-add-resistor-pot.html

 

[highfigh]

I swear to you I never ever ever have seen a VGA cable used like this but it for sure is a VGA cable. THus why I am looking for information on pin configuration.

At the end of the day a vga cable is just copper wires and can be used to send any signal you can send down them. I get your confusion though I as well am still confused.

how hard would it be to remove the vga connection and soldier on something else?

VGA is a video connection that happens to use this particular connector. The connector doesn't care how it's used, as long as it's not a high current/high voltage application where heat or arcing could cause damage.

 

[BMXTRIX]

I am doing this to educate myself. I have spent 40 bucks so far on this. I am doing it for that purpose. I want to have a better understanding.

Probably one of the biggest things you are gong to run into with your self education here is that you aren't dealing with industry standards, but a very proprietary Logitech in-house build. This means, that while you WILL learn stuff along the way, you won't actually be able to apply any of the proprietary information to other standards across the audiovisual industry. That is, speaker building talks in a language of math. Volume, ported/non-ported boxes, power, ohms, etc. They don't talk VGA. They don't really talk about circuit boards, but about voice coils. Most amplifiers are removed from speakers and are a different discussion in themselves. Crossovers are a solid week's worth of discussion I would imagine.

So, while you can easily make your own D-Sub-15 cable and pin it out however you may like, you first have to identify which pins go to what inside the proprietary product and that's going to be a fair bit of work for something that is possibly completely undocumented outside of their design labs.

Mostly, my guess, is that this is all about taking audio in/out of the main amplifier/distribution box (not to ever be called a subwoofer).

 

[quarinteen]

Probably one of the biggest things you are gong to run into with your self education here is that you aren't dealing with industry standards, but a very proprietary Logitech in-house build. This means, that while you WILL learn stuff along the way, you won't actually be able to apply any of the proprietary information to other standards across the audiovisual industry. That is, speaker building talks in a language of math. Volume, ported/non-ported boxes, power, ohms, etc. They don't talk VGA. They don't really talk about circuit boards, but about voice coils. Most amplifiers are removed from speakers and are a different discussion in themselves. Crossovers are a solid week's worth of discussion I would imagine.

So, while you can easily make your own D-Sub-15 cable and pin it out however you may like, you first have to identify which pins go to what inside the proprietary product and that's going to be a fair bit of work for something that is possibly completely undocumented outside of their design labs.

Mostly, my guess, is that this is all about taking audio in/out of the main amplifier/distribution box (not to ever be called a subwoofer).

I got the VGA pins figured out. I now have it working and when I connect it to the speakers it works. I put a Bluetooth receiver on it and that works. Now how do I test to get the best performance out of it?

 

[quarinteen]

I got the VGA pins figured out. I now have it working and when I connect it to the speakers it works. I put a Bluetooth receiver on it and that works. Now how do I test to get the best performance out of it? I ordered a 12 inch speaker on amazon. real cheap like 10 bucks. I want to use it as a bass speaker. Where do I go from here?

 

[Pogre]

If op can't even get past calling it a "VGA cable" I don't see learning anything useful from this project. If he does start using proper terminology, well, then I still don't think anything useful will be learned from this project. Those Logitech setups are garbage and not typical of the industry standards.

 

[Bucknekked]

Serial cables look like VGA cables in that they both have a similar shaped connector. But that's where the similarity ends. Except for some skunk works one-off bench critter, I don't see much of a good outcome here.

 

[3db]

I'm thinking the OP is meaning an RGA connector, something which a VGA cable is terminated with.

 

[Kvn_Walker]

It's a DB-9 serial connector. VGA is 15-pin. Either way, he got it to work. Curious how his bass project turned out, though.

 

[lovinthehd]

If you want to test results get a measurement mic and some software like REW. Then you can measure the response and levels and that might impart some useful information about the resulting audio. If you want to build a box for that driver you bought, you might download winisd and model an appropriate box for the T/S parameters of the driver (if such a driver actually provides all the T/S parameters). T/S stands for Thiele Small...

 

[Shaun_611]

I got the VGA pins figured out. I now have it working and when I connect it to the speakers it works. I put a Bluetooth receiver on it and that works. Now how do I test to get the best performance out of it? I ordered a 12 inch speaker on amazon. real cheap like 10 bucks. I want to use it as a bass speaker. Where do I go from here?

Since you are on the cheap, I suggest that you visit nearby thrift stores to locate a used Sub. You can pick something up cheap and then swap the speakers. If the surround does not fit, use the parts to build your own surround.

 

[lovinthehd]

Since you are on the cheap, I suggest that you visit nearby thrift stores to locate a used Sub. You can pick something up cheap and then swap the speakers. If the surround does not fit, use the parts to build your own surround.

Why would you base something on the surround of a driver at all?

 

[3db]

It's a DB-9 serial connector. VGA is 15-pin. Either way, he got it to work. Curious how his bass project turned out, though.

What the hell I was thinking? I was thinking of a composite video cable for some reason.. My bad ...