Custom Works: Loaded Control Plate for Jazz Bass®

I replaced an active preamp with passive switch on my favorite 5-string jazz and this thing sounds so good. More articulate and open sounding vs. how it sounded with the pre bypassed. My bass, a BassMods K534 is known in gospel and funk for a hi-fi jazz sound and super easy playability. However, I'm a rootsy reggae/jazz/soul player and wanted to capture the classic jazz tone for mostly finger styling playing with flatwounds - installing this pre-amp did it. This gives me a modern, super easy playing 5-string with a rich jazz bass tone with more clarity and range through the 2 volumes and single tone knob. I like modding basses but soldering is something I struggle with. I'm all thumbs when it comes to wiring but I was able to do it with some trial and error in under an hour. If my pickups had more identifiable wiring, it would've taken me alot less - not the fault of the harness. Those instructions were clear and the unit is super solid.

I love the quality and ease of install. My previous setup looked like a bird's nest but now it's neat and clean. I notice greater variability in volume and tone.

Worked well with new fender ultra noiseless pickups. Mounting plate fits Japanese fender jazz bass which was a nice surprise. Cable attachment is a lot more secure than my old harness. I like the Larger volume knobs.

Quality is impeccable, service is just magic. Great product and nice team at O.W
I would have loved a chamfered border on the plate, but it’s already beautiful like that.

Excellent product was very easy to install. Solderless connection made it quick & the mounting plate fit perfectly in my Sire v5 jazz bass.

Have obsidian wire in 3 telecasters and one jazz bass. Units are flawless and superior to anything else out there.

Swapping the controls out of my bass to rge obsidian was a breeze and it made switching pickups even easier. I highly recommend them.

Replaced my wiring and controls in my Fender Mexican Jazz and sounds better than my American Jazz…great service and fast shipping..will buy again..

The installation was a breeze and the sound on my J-Bass improved.

After years of soldering everything myself and swearing at my eyes going bad, I put one of these harnesses in one of my Jazz basses. What a wonderful process and sound. The one in there had all scratchy pots and now it's perfect.

It is my first time using a product like this. It was super easy and everything sounds great. It was a pleasure working with the company. They were fast, responsive very pleased. I look forward to working with them again. I would recommend it.

Ever since I discover Obsidian I never look back, all my basses are equipped with em, and now I had the chance to install one on my first J bass and just as expected, greatest quality, amazing value, and I can safely say the greatest upgrade you can do on your instrument

Thank you Obsidian

Awesome product! Super easy install. Works flawlessly. No dead spots, scratching, hissing, or any other anomalies. Couldn't be happier. Fretless Jazz Bass with passive Bartolini's.

Really nice and neat loaded jazz plate, Sounds great

Arrived quickly, great packaging, nice personalised note, easy to install, very happy with the product. Thank you.

Dropped right In should have done this a long time ago

This is a top quality product. I got the pre-wired harness mounted to a new control plate. Installation was easier than the removal of the factory plate and controls. The potentiometers make such a huge difference in volume and tone control. This has turned my good Jazz Bass into a fantastic Jazz Bass. If you're on the fence about this upgrade, go ahead and do it. The price is great and by doing it yourself, you're going to save money. And, be proud of tuning up your bass. Thank you, ObsidianWire!

Went to Obsidian Wire to upgrade my electronics for my Fender Jazz due to their ease of install. Surprised with how quickly I received the product, considering it had to come across the world to get to me. Product works perfectly and sounds brilliant! Excellent craftsmanship and easy install!

Just FYI I purchased this for a Sire V5 four string . It fit Perfectly. (Just wanted to let other Sire owners know that it fit; at least my model since there is not a lot of info out there.) Of course it was a pretty simple install and sounded great! This is my second time using Obsidian Wire. First time I purchased the set for an American P bass. This company is my go to for a quick install and great sound!

I’m not handy with a soldering iron and this definitely made the process easier. I’m not an experienced tinkerer so I can’t say if it has a greater range of sounds, but it’s certainly not less!

I have built three Jazz Bass variations over the last 12 years, my first one was a fretless, and it never really sounded right and the tone was off. I Finally got around to installing your Vintage JB controls and now it sounds great. I really love your product!! Keep up the great work!

simple, EZ to use and install, fantastic design and tone. Highly recommend.

I had previously used standard components on this jazz bass but had problems.(dead pickup) I thought that the harness (circuit Board solder less install) would be better. As well as sound better, It did!! Im Happy!
I did have some problems with the wire ends from the pickups, not wanting to stay connected but using a tweezer to hold the wire in place did the job!
Very well Made! My wife said so, She is a certified solder and assembly person with over 30 years experience!
She makes things that go in airplanes.

This sounds great and was easy to instal BUT The pots are "too smooth" and they rattle. .. I wanted to love this but, I'm not happy.