JBL 3152A
The JBL 3152A is a 2-way dividing network, a passive crossover, built for high input resistance. It crosses over at 500Hz and handles 250W of continuous program material.
JBL specified carefully selected parts inside: high-voltage non-polar capacitors, low-loss inductors, and resistors. It weighs 5.5kg, so it's a substantial piece of iron. The original price was ¥74,000 per unit around 1983 (an earlier listing shows ¥56,000 around 1981).
Documentation on the 3152A is thin. No production years, dimensions, or frequency response data are recorded, and nothing says which JBL speaker systems this network was intended for. What survives is mostly from Japanese auction and blog listings. One owner reported a failure where the high range was cut too heavily and suspected the capacitors. He also noted that JBL no longer carries repair parts. Replacing them with high-end audio capacitors would be the likely fix, though that would change the original sound. A 2026 Yahoo! Japan auction for a unit in overall poor condition closed at ¥31,073 after 60 bids. Another used listing asked $904 for a maintained example.
audio-heritage.jp confirms the strapping-bar attenuation adjustment and the carefully selected parts. That matches what the Japanese database listings record.
eBay Listings
As an eBay Partner, we earn from qualifying purchases. This helps support our independent vintage technology research.