Hertz SP 4.900 is a compact multi-channel amplifier from the SPL Show Series built around the renewed Hertz ADC (Advanced D-Class) output stage. It is designed to deliver high continuous power with very high efficiency in installations where space, heat management, and reliability are critical. The SP 4.900 supports 4-channel, 3-channel, or 2-channel configurations, making it suitable for full-range systems, bridged subwoofer applications, or mixed front + sub layouts. With up to 160W x 4 RMS @ 4Ω or 500W x 2 RMS @ 4Ω bridged, it provides substantial output from an ultra-compact chassis, ideal for motorcycles, under-seat installs in sports cars, and behind-seat truck installations. Key Performance Features Advanced D-Class (ADC) amplifier architecture with up to 85% efficiency Configurable 4-channel, 3-channel, or 2-channel operation High continuous output with low distortion and high damping factor Ultra-compact aluminum chassis for space-restricted installs IP55 rating for resistance to dust, moisture, and environmental exposure Designed for automotive, motorcycle, and powersports applications Power Output 4 Channels @ 4Ω: 160W x 4 RMS 4 Channels @ 2Ω: 250W x 4 RMS 3 Channels @ 4Ω: 160W x 2 + 500W x 1 RMS 3 Channels @ 2Ω: 250W x 2 + 500W x 1 RMS 2 Channels @ 4Ω (Bridged): 500W x 2 RMS Total Power: 1000W Inputs & Tuning Pre-amp (RCA) and high-level speaker inputs Independent filtering for Channels 1-2 and 3-4 High-pass filter: 50–5,000 Hz @ 12 dB/oct Low-pass filter: 50–5,000 Hz @ 12 dB/oct Bass boost: 45 Hz, adjustable 0–8 dB (LPF enabled) Remote turn-on via traditional remote or DC-offset speaker signal Installation Use Cases Front and rear speaker amplification in compact vehicles Front speakers + bridged subwoofer systems Motorcycle and powersports audio systems Under-seat or behind-seat truck installations Technical Specifications Brand: Hertz Series: SPL Show Model: SP 4.900 Amplifier Class: Advanced D-Class (ADC) Channels: 4 / 3 / 2 RMS Power: 160W x 4 @ 4Ω Total Power: 1000W Minimum Load Impedance: 2Ω (4-ch), 2Ω + 2Ω + 4Ω (3-ch), 4Ω (2-ch) THD: 0.02% @ 1 kHz, 4Ω Signal-to-Noise Ratio: 105 dBA Frequency Response: 10 Hz – 35 kHz Damping Factor: 200 @ 1 kHz Operating Voltage: 11–15 VDC (6–16 VDC pulse) IP Rating: IP55 Dimensions: 211.6 x 130 x 49 mm (8.33 x 5.12 x 1.93 in) Weight: 2.15 kg (4.74 lbs) What’s Included (1) Hertz SP 4.900 amplifier Mounting hardware User documentation Why Buy From MCOR Automotive Authorized Hertz retailer Pro-level system design and amplifier matching support Experience with automotive and motorcycle audio systems Fast shipping and knowledgeable technical assistance Physical Specs mm in A 205 8.07 B 211.6 8.33 C 107 4.212 D 130 5.118 E 49 1.929 Fitment, Installation & Warranty Notes Fitment Help: Need help confirming fitment, compatibility, amplifier matching, or installation parts? Use our Fit Guide or contact us through the chat button before ordering. Authorized Retailer: MCOR Automotive is an authorized Hertz retailer. Products purchased from MCOR include applicable manufacturer warranty coverage when installed and used according to manufacturer guidelines.
