The is a classic frequency dividing network (crossover) designed primarily to integrate JBL high-frequency transducers, such as the 075 (bullet tweeter) or 077 , into existing two-way speaker systems. It operates at a fixed crossover frequency of 7,000 Hz with a slope of 12 dB per octave . Circuit Overview and Schematic Details
The N7000 is designed for high-frequency terminals of the main dividing network, bridging the signal from the amplifier to the 075 tweeter.
Typically uses 1.5 µF capacitors and specialized inductors. 💡 Restoration & Rebuilding Blogs
Thread: Rebuilding a JBL N7000. Possible? - LANSING HERITAGE jbl n7000 schematic
All rails include output capacitors (polypropylene + ceramic) placed close to the load to minimize loop inductance.
Replace old caps with premium audio-grade film capacitors (such as Mundorf, Jantzen, or Dayton Audio) matching the exact microfarad ( F) rating.
While I couldn't locate a publicly available schematic for the JBL N7000, there are a few resources you can explore: The is a classic frequency dividing network (crossover)
The N7000 is a relatively simple high-pass network. Its primary job is to protect delicate ultra-high frequency (UHF) drivers from lower frequencies and to balance their output with the rest of the system. A standard N7000-style circuit usually consists of: Inductors: Used to create the roll-off curve.
The core design of the N7000 is a 2-way frequency dividing network. It features a crossover point at 7,000 Hz, which is exceptionally high compared to modern standards. This high transition point was intentional; it allowed the woofer to handle the majority of the vocal range while the 075 tweeter added "brilliance" and "shimmer" to the top end. The network is an 8-ohm design, ensuring compatibility with the standard impedance of JBL professional series drivers.
Air-core or iron-core. Original vintage units often used high-purity copper wire wound around iron cores to minimize DC resistance (DCR) while maintaining a compact size. Typically uses 1
For audiophiles, vintage collectors, and technicians looking to restore or modify these units, understanding the is essential. This article breaks down the technical aspects, functional design, and common practices for repairing these classic crossovers. What is the JBL N7000?
Acquiring the necessary documents and components for your N7000 project involves knowing where to look. The following resources are invaluable for the DIY restorer.
Some variations in coil part numbers (e.g., 10421 vs. 13219P) exist, but they generally hover around the same 0.57--0.6 mH value.