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/diy/ - Do It Yourself

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675126 No.675126[DELETED]  [Reply] [Original]

So I have been refurbibg an old Nintendo Cab I found on the side of the road back into a Donkey Kong style Mame machine. I wanted to use the original speaker inside. All I did was connect a Mono Speaker plug to the speakers wires. I know the speaker works fine but when connected to the pc inside the machine the sound is much too low. What can I do to make it louder? I'm trying to avoid using an amp that requires a battery or external power source.

>> No.675139

>>675126
You need an amp. Old arcade machines use them. Computer sound cards don't have them built in and need one installed between the card and the speaker. Just don't give it more power than it can handle or you will blow it.

>> No.675146

You can get generic <10W amp modules for just this kind of job

something like:
http://www.maplin.co.uk/p/40w-power-amplifier-module-n67aw

Once you convert "40W, peak into 4ohms @ 16v" into "RMS into 8ohms @12v" it'll probably be much closer to something reasonable

>> No.675467
File: 105 KB, 720x960, progress overview.jpg [View same] [iqdb] [saucenao] [google]
675467

>>675126

Hijacking your thread a bit here dude. Didn't want to make my own.

I've made a bit of progress with my own cabinet here and wanted to show it off a little.

>> No.675468
File: 120 KB, 720x960, access door wip.jpg [View same] [iqdb] [saucenao] [google]
675468

>>675467

Theres one square panel here that I want to make into an access door for me though I'm not entirely sure of the best way. Anyone got any ideas?

>> No.675469
File: 120 KB, 720x960, cable management.jpg [View same] [iqdb] [saucenao] [google]
675469

>>675468

Lastly I put some zipties in to manage the ratnest of cables a bit.

Coming up to painting as next job~

>> No.675470

>>675126

Also thats a nice cabinet, post more pics?

>> No.675472

>>675468
>Anyone got any ideas?

Strengthen the front sides. Run something across the top inside to do away with that upright the pi is mounted on. Move the pi to the side. Turn the front into a door.

>> No.675473

>>675472

I meant suggestions for making the front into a door.

>> No.675474

>>675473
That is what I just gave you.

>> No.675475
File: 94 KB, 720x960, door.jpg [View same] [iqdb] [saucenao] [google]
675475

>>675474

Maybe you could elaborate a bit, I'm not following what you mean. The pi is at the back of the unit.

Heres another picture

>> No.675476

>>675475
maybe you could not be a cunt and go make your own thread as opposed to dragging this one further and further off topic.

>> No.675477
File: 12 KB, 567x504, ss.png [View same] [iqdb] [saucenao] [google]
675477

>>675475

This is what I was thinking, build up a little bit of a frame for the door on the inside of the panel.

>> No.675479

>>675476

I don't really see how I'm being a cunt. I searched the catalog for threads on arcade cabs and found this one. I only had a couple pictures to post so I didn't see it requiring its own thread.

>> No.675499

>>675476
You're a douche. OP had his question answered in the first reply.

>> No.675502
File: 39 KB, 580x388, door.jpg [View same] [iqdb] [saucenao] [google]
675502

>>675475
>The pi is at the back of the unit.

Oh ok. It looked like you were showing us in the back of the unit but that pic makes it clear now.

What if you put metal tabs on the bottom of the door that hooks behind the bottom panel and a latch at the top.
>Undo latch
>Pull top of door out
>Remove door

Pic related but removable and with latch at top.

>> No.675524

>>675139
>You need an amp. Old arcade machines use them. Computer sound cards don't have them built in

This is wrong and has been since the day of ISA cards. Plenty of sound cards come with amplifiers built-in.

>> No.675539

>>675524
I've not seen a sound card with an amplifier *since* the days of ISA cards.

What would you plug it into, anyway? Where can you even get unamplified speakers?

>> No.675546

>>675539
They all have amplifiers for headphones (TPA6120A2 is a pretty common one nowdays, TEA2025 was common back in SB16 days) but this only bumps the output up to around 0.5 to 0.7 watts; Enough to drive headphones and provide a low SNR signal to a set of amplified (or even the small unamplified ones like you used to get with SB cards in the late 90's) speakers.