Beta 3 U15a Service Manual (2026)

Use balanced cables and ensure the input signal is not clipped, which can cause excessive heating in the Class H amplifier stage.

U15a Product Type: Powered Loudspeaker System (Active) Document Version: 1.0 Issue Date: [Insert Date] Classification: Service & Technical Information – Authorized Personnel Only

The U15a utilizes a split-topology internal amplifier panel: Beta 3 U15a Service Manual

The Beta Three U15a Input Panel handles dual input paths via an analog routing framework.

[AC Input] → [EMI Filter] → [SMPS PSU] → ±15V (low current) & ±55V (high current) ↓ [Balanced XLR Input] → [Op-amp buffer] → [Electronic Crossover] → [LF DSP/Limiter] → [Class D Amp] → LF Driver → [HF DSP/Limiter] → [Class AB Amp] → HF Driver Use balanced cables and ensure the input signal

Clip/Limit (Red): Indicates the internal optical/electronic limiter is active. ⚡ Troubleshooting and Diagnostic Flowchart

Lights when the amplifier is approaching clipping. ⚡ Troubleshooting and Diagnostic Flowchart Lights when the

By investing in the Beta 3 U15a Service Manual, users can:

: The horn provides a controlled coverage pattern of 50°–100° x 55°, allowing for flexible vertical or horizontal orientation.