Jbl N7000 Schematic Access

Consists of a series capacitor (C2), a parallel inductor (L2), and an attenuation network (potentiometer or fixed resistors).

Positioned in parallel across the output load to shunt remaining low-frequency energy safely away from the tweeter. Attenuation Circuitry (L-Pad)

The positive input passes through the capacitor, the inductor shunts low frequencies to ground, and the signal passes through an adjustable control to match the efficiency of the tweeter to the woofer. 3. The Attenuation Circuit (L-Pad)

A 12 dB/octave high-pass filter for the tweeter and a low-pass filter for the mid-range. Basic Schematic & Components

You're looking for a schematic diagram of the JBL N7000!

Understanding the specific parts is crucial for any restoration or repair. The N7000's primary passive components are its capacitor and inductor. According to vintage JBL literature, the part number for the is #10460 , which corresponds to a 1.5 μF (microfarad) unit. For the inductor , the schematic calls for a coil of 0.6 mH (millihenry) . It is important to note that JBL used different part numbers for the inductor in the standard N7000 ( #13219P or #16265 ) and the 16-ohm version ( #10421 ), with measured values coming in around 0.57 mH and 0.5 mH respectively.

The variable level controls often accumulate oxidation over decades, causing scratchy sound or signal dropouts. Use a high-quality electronic contact cleaner (like DeoxIT) to restore smooth operation.

The JBL N7000 is a legendary frequency dividing network (crossover) engineered during the golden era of high-fidelity audio. Designed to manage the precise transition of audio signals between low-frequency woofers and high-frequency compression drivers, it remains a highly sought-after component for vintage audio restorers and DIY audiophiles.

According to technical documentation and enthusiast discussions on sites like Lansing Heritage , the N7000 is electrically very similar to the JBL 3105 network . Fixed at 7 kHz. Circuit Topology: Typically a 12 dB/octave slope.

The N7000 uses a 2nd-order Linkwitz-Riley filter. This network, which consists of an for the low-pass section and a capacitor in series for the high-pass section, creates a combined 12 dB per octave slope. This steep roll-off is crucial for the 075/077 bullet tweeter, as it protects it from potentially damaging lower frequencies while allowing it to perform optimally in its designated high-frequency range. For those looking to experiment or troubleshoot, the professional version of the N7000 is the 3105, which is electrically identical.

Restoring an N7000 is a popular project. Here is a practical step-by-step guide:

(7 kHz). Its circuit is designed to provide a 12 dB per octave rolloff on both sides of this frequency, ensuring a smooth transition between drivers. Thread: JBL N7000 Crossovers - LANSING HERITAGE

What (woofer and tweeter) are you planning to connect to it?

The heart of this article is the N7000 schematic itself. After decades of being a primary source for JBL documentation, the official schematic can be found on the JBL Professional website.