Beta 3 U15a Service Manual 【POPULAR】
| Specification | Value | | :-------------------------- | :---------------------------------------------------- | | | 40Hz – 18kHz | | Max SPL @ 1m | 114dB Continuous / 120dB Peak | | Dispersion (H x V) | 100° x 55° | | Transducers (LF/HF) | 1 x 15" Woofer / 1 x 1.7" Compression Driver | | Total Power (RMS) | 400W (RMS), 800W (Music), 1600W (Peak) | | Nominal Impedance | 8Ω | | Input Connectors | 2 x XLR | | Voltage Range | AC 220V-240V~, 50/60Hz (or 110V-120V~, 50/60Hz option)| | Power Consumption | 22W (Static), 70W (Rated) | | Dimensions (WxDxH) | 485 x 460 x 700mm / 19.1 x 18.1 x 27.6in | | Weight (Net) | 30.5 kg / 67.2 lb |
These are gold for reconing. The manual gives the exact (352mm), the screw hole pattern (4 holes at 90°, M6 thread), and the gasket thickness (3mm closed-cell foam).
Always disconnect the power cord before opening the speaker cabinet. Beta 3 U15a Service Manual
When servicing a malfunctioning U15a, follow this logical diagnostic path to isolate the failure to the transducer, preamp, or power amp stage. 1. Speaker is Completely Dead (No LEDs)
Understanding the precise thresholds and components of the U15a cabinet is the first step in diagnosing systemic faults. Feature / Specification Factory Standard Value 2-Way Full Range Active Speaker LF Transducer 1 x 15” Woofer with 50mm ( ) Voice Coil HF Transducer 1 x 1.7” Diaphragm Compression Driver Frequency Response (-3dB) Maximum Peak SPL Amplifier Design Type Class H Bi-Amp Module ( Dispersion Pattern (H x V) Rotatable Horn Input Impedance / Unbalanced: Cabinet Construction Polypropylene Injection Moulded Plastic Net Weight 2. Component Disassembly & Cabinet Access | Specification | Value | | :-------------------------- |
Since "Beta 3 U15a" typically refers to the (often manufactured by companies like Taizhou Biao Bang or similar OEM brands), the service manual usually focuses on the pump assembly, engine coupling, and unloader valve.
The or serial number prefix of your U15a unit. When servicing a malfunctioning U15a, follow this logical
The U15a is designed for easy serviceability. Key areas of maintenance include: A. Woofer and Driver Replacement