External sub is all I have, sounds great. Polk psw10

This is a must. I also add Flipper Fidelity upgraded speakers to my pins.
Nothing better than AC/DC Rockin the house.

same here. external subs on most pins. polk psw10. wait for it to be on sale on amazon or newegg.com. can hook two pins on one sub. much easier to install too.

For AC/DC I'd go with external sub. I have the Flipper Fidelity kit on mine and am actually pretty disappointed with it on this title. The external sub was the overall better move I made on the game.

You have two main options:
- Alligator clip method. You soldier (or crimp) some alligator clips to the end of some speaker wire. Connect the positive side wire to the positive terminal on the powered external sub and the neg to the neg. This is what I've done and was a great use of the alligator clips that come with the comet matrix light kits, just a FYI
- Buy the sound board add on. I haven't used it before but I've been told that it creates a cleaner and more powerful sound. I believe the board runs about $35. It connects to your stock board and adds pre-amp outputs. http://www.pinnovators.com/catalog/product_info.php?products_id=38

One thing to add. I also like to get the volume control button that goes in the tournament button location. Makes turning the sound up and down a breeze mid game as necessary. https://www.pinballlife.com/index.php?p=product&id=2894

You’ll overall get a better result with an external, enclosed, powered sub (ie anything you can plug directly into your stereo).

Cabinets just don’t seem to be well-suited for good bass, and none of the fancy pinball upgrade kits are using enclosed woofers (aka a sub) which you must have in order to get good punchy bass. Plus, the games’ amps don’t really provide enough power so you have to upgrade that too.

I asked Greg from PinballPro about it, and he said they didn’t have anything in that vein, but my impression was that they had not really like they had looked into it much. It’s more expensive, for sure, so it’s probably not a great business strategy for them.

Bottom line: an external sub has its own amp and enclosure and is far and away your best option

Fully agree from a bass perspective. I got the FF kit in goals of getting better mid and high sounds from the backbox speakers to go with the better bass from the external sub. Didn't notice near the improvement with AC/DC that I did with my AV and TF. I'm guessing it has to do with the compression of the songs but I'm not sure.

This is a no brainer...dont wast your money on the flipper fidelity speakers...buy the pinnovators sub board ($35), and an external sub ($100)...both can be purchased for less than the speaker upgrade and they improve the sound immensely ..... I have the stock speakers in my ACDC Prem with pinnovators and external sub and it sounds better than the Met with flipper fidelity speaker upgrade....

Make sure to get the right OHM speakers otherwise say goodby to your sound board. It's not as easy as just taking some off the shelf auto speakers and slapping them in the game. Have people done it - Yes. is it safe and something I would recommend - Nope.

You won't hear much of an improvement with new back box speakers because of the quality of the audio coming out of the game. It's not necessarily a speaker issue, but a compression issue I believe. If there was a way to tweak the audio with an equalizer, that might work, but i don't think this is possible.

I recommend the Pinnovators PinPAC headphone kit (including the separate sub connection module). I have installed these along with a Polk subwoofer on all my modern Sterns and it's so nice to have the ability to easily change the volume during a game as well as have the ability to plug a set of headphones in when needed!

Another advantage of the PinPAC unit is that they enable you to easily turn the external volume on/off too. I routinely turn the sound off on all of my games before shutting them down so that the otherwise occurring speaker pop is avoided when the game's power is turned on or off.

If you want the best, it will cost you:

acdc speakers (resized).jpg

It's pretty straight forward and safe if you're not reckless about it. Get some coaxial car speakers which are 4-ohm (many use the Pyle blues) and wire them in series: don't just drop them in, the existing wiring is parallel with 8-ohm speakers.

There is no way to improve the compression of the source audio. It's compressed before it's even loaded into the software. The output you get can't be uncompressed.

Does AC/DC support the pinBrowser? That's a way you could get better fidelity audio

Yes, it does support pinball browser and that is a good thought about doing so. Not sure how it will be effected by the memory though as I believe the board is just about maxed out and also one of the reasons the songs are compressed the way they are.

They aren't bad but just doesn't seem to get any better with better quality speakers like some other games do. My MET is about the same way. MET felt better than AC/DC though but not by much. Nothing like my other SAM based games. For instance TF and AV made a pretty significant difference.

if the board is maxed out, that is more about disk space/memory; the compression that's being discussed is both data compression and audio compression (too much of either can lead to lesser quality), so there might be a way to find a better happy medium. less audio compression is best (the audio is already compressed the way the band wanted it to sound). MP3 format does both - smaller file size but you also lose a lot of fidelity. it tosses out sounds you can't hear (too high or low frequencies, or sounds which are layered on top of one another - the bottom layer gets discarded). Anyway, there should be a way to re-do those files. Pinball companies are not known for their mastery of the audio parts of the game

Guess you could try taking the tracks off a CD and use a tool like audacity to filter/compress it and then upload it via pinball browser. Would be interesting to see/hear the results.

I think it's a stretch to think that professionals doing pinball programming or sound packages could be easily improved upon by your typical Pinball Browser user. There are alternative packages out for Walking Dead that are very well done though, maybe one of those creators would have some insight about improving the quality of the source material.

Hey now, don't burst our bubble and let us feel smart for a min...

P.S. - Don't you have some spreadsheet to update. I want to know who won last night (Better have been you since you knocked me out)

I was really just referring to the notorious Bally/Williams speaker configuration