Before Restoration
When this University N-3 pair arrived at our workshop, our technicians inspected the complete speaker systems before beginning service and final preparation.
The inspection covered the C15W woofer sections, T-30 horn-loaded drivers, high-frequency horn sections, N-3 crossover networks, Presence and Brilliance controls, internal wiring, speaker connections, cabinet interiors, exterior wood surfaces, and grille assemblies.
The cabinets, grille cloth, crossover housings, and internal components retain visible age-related cosmetic character consistent with vintage loudspeakers of this period.
During Restoration
The complete pair was cleaned, inspected, serviced, and prepared by our HQaudios team with attention to proper three-way operation and reliable signal transfer.
Low-Frequency Sections: The C15W 15-inch woofer sections were inspected and checked during system operation.
Midrange Sections: The T-30 horn-loaded compression-driver sections were inspected and checked as part of the complete systems.
High-Frequency Sections: The horn-loaded high-frequency sections were checked during system operation.
N-3 Crossover Networks: The three-way crossover networks and their Presence and Brilliance controls were checked during operation.
Connections & Wiring: Accessible internal wiring, speaker connections, and signal paths were inspected and cleaned as part of the service process.
Cabinets & Grilles: The wood cabinet surfaces and woven grille assemblies were carefully cleaned and detailed for final presentation.
Internal Components: The crossover housings, horn assemblies, woofer frames, cabinet interiors, and damping materials were inspected and cleaned where accessible.
After Restoration / Final Testing
After service and preparation were completed, the pair underwent final functional and listening tests.
Three-Way Output: Bass, midrange, and high-frequency reproduction were checked during final operation.
Left / Right Playback: Both speakers were compared for consistent operation as a stereo pair.
Presence / Brilliance Controls: Both adjustment functions were checked during playback.
Crossover & Connections: Three-way crossover operation and speaker signal connections were checked during final testing.
Listening Test: The pair was evaluated using real music playback to confirm overall system operation after service.
Final QC: A final visual and functional quality-control check was completed before the pair was prepared for sale.
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