The Sound Town STCA500-63 is a professional 2-channel commercial power amplifier delivering 500W RMS (2 × 250W) in 70V/100V operation, with additional support for 4–16Ω low-impedance speakers through its direct output terminals. Designed for multi-zone installations, it features a dedicated 70V zone output section that provides three stereo or six mono zones using independent left and right volume controls per zone. This architecture offers exceptional flexibility for distributed audio environments while maintaining proper power routing and load management. An integrated clipping limiter helps safeguard both the amplifier and connected speakers from signal overload. The amplifier offers comprehensive connectivity, including stereo RCA input/output, Optical (SPDIF), Bluetooth streaming, a USB/MP3 player, a recorder, and a built-in FM radio. Three microphone inputs are also provided, and all playback and source settings are conveniently managed through the clear front-panel LCD display. For precise system tuning, the STCA500-63 provides six individual zone volume controls (Left and Right for each zone), along with master volume, left/right balance, global bass and treble, and dedicated volume knobs for Line, MP3, and SPDIF sources. Microphone control is equally flexible, with MIC 1–3 level adjustments, echo control available on Mic 2 and Mic 3, and a Mic 1 priority function offering adjustable attenuation from 0–30 dB to ensure important announcements override background audio when needed. Its durability and feature set make it an excellent choice for restaurants, bars, lounges, schools, warehouses, and other commercial environments. FEATURES 2-CHANNEL AMP WITH 3-STEREO / 6-MONO ZONES: The Sound Town STCA500-63 delivers 2 × 250W RMS in 70V/100V operation through its direct output terminals, which also support 4–16Ω low-impedance speakers. A separate 70V zone output section provides three stereo or six mono zones with individual left and right volume controls, ideal for distributed multi-zone installations. COMPREHENSIVE CONNECTIVITY: Includes RCA input/output and three microphone inputs, plus an Optical (SPDIF) input, Bluetooth streaming, a USB port, a recorder, and a built-in FM radio, with playback functions managed through a clear front-panel LCD display. PRECISION AUDIO CONTROL: Zones 1–3 include separate Left and Right volume knobs (six total) for precise level adjustment in each area. Additional controls include master volume, left/right balance, global bass and treble, individual MIC 1–3 levels with dedicated echo control on Mic 2 and Mic 3, and dedicated volume knobs for Line, MP3, and SPDIF inputs. Mic 1 also features a priority mute function with adjustable attenuation (0–30 dB) to ensure announcements are heard clearly. BUILT FOR DURABILITY AND SAFETY: An integrated clipping limiter prevents the amplifier and connected speakers from signal overload, while the rugged cast aluminum front panel, heavy-duty metal chassis, and 2U rack-mountable design ensure reliable performance. Ideal for venues such as restaurants, bars, schools, and warehouses. SPECIFICATIONS Specifications Model STCA500-63 Output Power 2 x 250W RMS Output Type 70V / 100V / 4–16Ω Mic Input 3 mV, 600Ω Line Input 200 mV, 10 kΩ Frequency Range 50 Hz - 20 kHz THD (Distortion) 0.5% (at 1 kHz) S/N Ratio (AUX) 88 dB S/N Ratio (MIC) 116 dB Operating Voltage 110V - 230V Dimension & Weight Product Width (in.) 19.0" Package Width (in.) 21.8" Product Height (in.) 3.5" Package Height (in.) 7.5" Product Depth (in.) 16.1" Package Depth (in.) 21.5" Product Weight (lb.) 33.5 lbs Package Weight (lb.) 38.6 lbs Warranty/Certifications Manufacturer Warranty 1 Year FAQ Q: What speaker wire should be used for this system? A: Speaker wire is not included. To ensure optimal performance and minimize signal loss, select the appropriate wire gauge based on the distance between your amplifier and speakers: Distance Wire Gauge 10–15 ft 18 AWG 15–25 ft 16 AWG 25–50 ft 14 AWG 50–100 ft 12 AWG Over 100 ft 10 AWG Using a thicker (lower gauge) wire for longer runs helps maintain signal strength and overall audio quality. DOWNLOADS STCA500-63 User Manual
