JBL 3122 Frequency Dividing Network – Pro Series Passive Crossover

JBL 3122 Frequency Dividing Network – Pro Series Passive Crossover

For Sale, we have this JBL 3122 Frequency Dividing Network—an essential piece of gear for anyone building out a vintage JBL PA stack or restoring a classic rig. Built in Los Angeles by the legendary James B. Lansing Sound Inc., this Professional Series unit delivers precise passive crossover action between your LF and HF drivers, complete with adjustable high-frequency gain (-6dB to 0dB). It's old-school engineering at its finest—no digital trickery here, just pure, rugged tone sculpting the way it used to be done.

Cosmetically, this unit is in solid condition with honest wear throughout, including some light scratches and general patina that only adds to its industrial charm. The terminals and controls are intact and clearly labeled, and the vintage aluminum faceplate still proudly bears that iconic JBL badge. From the textured metal enclosure to the analog knob feel, this thing was built like a tank and made to last decades—and clearly, it already has. Serial number 10442A is clearly visible on the original factory label.

Whether you're restoring a vintage JBL PA, dialing in a bi-amped studio monitor setup, or just love the aesthetic and sound of true analog signal division, this is a righteous piece of audio history ready to get back to work. Don’t sleep on it—these units don’t pop up too often in this kind of shape.

At Tone House, we're not just sellers, we're passionate musicians, gear aficionados, and seasoned professionals dedicated to the craft of making music. We take pride in our curated music collection. We love giving these vintage and rare pieces new life through maintenance and upkeep. Our goal is for these units to be at their optimal performance before going to their new homes.  Every item you acquire from us undergoes a meticulous inspection process conducted by our team of enthusiasts, studio engineers, and live performers. With full-time technicians on staff, rest assured that each piece is thoroughly examined and tested before being professionally packed.

All orders placed by 2 pm are processed the same day. This ensures that your gear is swiftly prepared for shipment, guaranteeing prompt delivery in the condition promised. Once your order is in transit, automatic tracking information is provided, allowing you to monitor its journey from our shop to your doorstep with ease.

The units/items you see in our pictures are precisely what you'll receive. Have questions? Feel free to ask before making a purchase. Additionally, we offer custom modifications, within reason, to many of the guitars and products we sell, ensuring they perfectly suit your unique requirements.

Our dedication to your satisfaction doesn't end with the purchase. We value your feedback and strive for excellence in every transaction. If, for any reason, you're not completely satisfied, please reach out to us before leaving feedback. Your happiness is our priority, and we're here to ensure your musical journey is nothing short of exceptional.

*BUY WITH CONFIDENCE*

Please note that additional shipping charges may apply to buyers in Hawaii, Alaska, Puerto Rico, and the Virgin Islands. Feel free to contact us for shipping rates before making your purchase.

For Returns: Your satisfaction is our priority. If for any reason you're not completely satisfied with your purchase, please don't hesitate to reach out to us via message. We're here to address any concerns and ensure you have a positive experience with Tone House.

FO #10443A