Ultrafide SP500 Power Amplifier

Product Summary

The Ultrafide SP500 is a high-performance stereo power amplifier designed to bring Ultrafide’s professional audio heritage into a sleek, more compact hi-fi form. Short for squaredPOWER, the SP500 uses minimalist square casework that fits neatly into a wider range of systems, while retaining the powerful Ultra Sigma amplifier technology first introduced in the flagship U500DC.

Delivering 500 W per channel into 4 Ohms and 250 W per channel into 8 Ohms, the SP500 has the drive and control needed to partner a wide variety of loudspeakers with confidence. Its Ultra Sigma Class D output topology is supported by a robust 500 VA linear power supply, helping the amplifier deliver scale, grip and dynamic stability without adding unnecessary bulk.

The SP500 is fully DC coupled from input to output, supporting clean, accurate signal transmission and fast transient response. Balanced XLR and RCA inputs are both included, with XLR link outputs and multiple speaker connection options giving useful flexibility for hi-fi, studio and custom installation systems.

With its Pure Timbre sonic signature, professional-grade engineering and elegant compact chassis, the SP500 is an excellent choice for listeners who want serious amplifier power, low distortion and refined musical performance in a more understated design.

Key Benefits

• Delivers powerful speaker control with 500 W per channel into 4 Ohms and 250 W per channel into 8 Ohms
• Ultra Sigma Class D topology offers high power, low distortion and excellent efficiency
• 500 VA linear power supply helps maintain strong, stable performance during demanding music passages
• Fully DC-coupled signal path supports fast, clean and accurate audio transmission
• Pure Timbre sonic signature is designed for a clear, engaging and natural presentation
• Balanced XLR and RCA inputs make it easy to integrate with a wide range of pre-amplifiers
• XLR link outputs, binding posts and speakON connections provide useful system flexibility
• Compact square casework fits neatly into mixed hi-fi systems and custom installations
• Rack mounting kit available for studio and custom installation use
• 5 years manufacturer's warranty

Technical Specifications

Amplifier Type

• Type: Stereo power amplifier
• Channels: 2
• Design Topology: Ultrafide Ultra Sigma Class D topology with Sigma-Delta modulation
• Inter-stage Coupling: Fully DC coupled
• Power Supply: 500 VA linear power supply
• Sound Signature: Pure Timbre
• Rack Mounting: Optional rack mounting kit available

Power Output

• RMS Power into 4 Ohms: 500 W per channel, 600 W at high gain setting
• RMS Power into 6 Ohms: 333 W per channel, 400 W at high gain setting
• RMS Power into 8 Ohms: 250 W per channel, 300 W at high gain setting
• RMS Power into 12 Ohms: 166 W per channel, 200 W at high gain setting
• Maximum Voltage: 70 V
• Maximum Current: 30 A, pulsed testing

Audio Performance

• Frequency Response: 5 Hz – 20 kHz, ±0.3 dB
• Distortion: 0.003% at 5 W
• Dynamic Range: 115 dB, unweighted, 22 Hz – 22 kHz
• Output Impedance: 25 mOhms
• Input Impedance: 10 kOhms, RCA and XLR
• Input RFI Filtering Capacitance: 550 pF, RCA and XLR
• Sensitivity: 2.2 V
• Voltage Gain: 26 dB standard factory setting, 29 dB optional high gain setting
• Stability: Unconditional

Connections & Controls

• Audio Inputs: 2 × RCA single-ended and 2 × XLR balanced
• Audio Outputs: Binding posts, NL4 speakON and XLR link outputs
• Speaker Outputs: 3 pairs, including 2 × binding post and 2 × NL4 speakON
• Power Supply Connector: 10 A Furutech C13 IEC
• Power Isolation Switch: Rear panel
• Standby Switch: Front panel
• Remote Standby Connector: Rear panel
• Power Indicator: White for out of standby; red LED for clipping or protection

Power Consumption

• Operational Power Consumption: 200 W average, 1000 W maximum
• Idle Power Consumption: 15 W
• Standby Power Consumption: 1 W
• Nominal Supply Voltage: 230 V AC 50 Hz or 120 V AC 60 Hz

Physical

• Dimensions (L × W × H): 318 × 355 × 90 mm
• Weight: 12.5 kg
• Packed Dimensions (L × W × H): 590 × 405 × 152 mm
• Packed Weight: 14.65 kg

What’s in the Box

• Ultrafide SP500 stereo power amplifier
• Mains power cable
• Product documentation