Ampeg SVT-4PRO Bass Amplifier Head

The Ampeg SVT-4PRO delivers massive professional bass power, deep routing flexibility, and legendary SVT tone shaping in a touring-grade hybrid rackmount amplifier built for serious stage and studio performance.

• 1200-watt bridged hybrid bass amplifier head with tube preamp and solid-state power section
• 3 x 12AX7 tube preamp delivers classic Ampeg warmth, punch, and harmonic character
• Extensive tone shaping with 9-band graphic EQ and 5-position midrange selector
• Professional stereo, mono, and bi-amp operation with internal crossover
• Dual transformer-balanced DI outputs, dual effects loops, compressor, and limiter controls

The SVT-4PRO stands as one of the most powerful and flexible amplifier heads ever produced by Ampeg. Designed for professional bass players who demand maximum tonal control, massive output capability, and advanced stage routing options, the SVT-4PRO combines classic SVT-inspired character with modern touring functionality.

Its hybrid design pairs a three-tube 12AX7 preamp section with a powerful solid-state output stage, delivering the warmth, authority, and responsiveness that define Ampeg bass tone while maintaining exceptional clarity and reliability at high performance volumes.

The SVT-4PRO is built for bassists who require serious tone shaping power. A flexible 3-band EQ works alongside a 5-position midrange selector and footswitchable 9-band graphic EQ, allowing highly detailed control across a wide range of musical styles and performance environments. Ultra-Lo and Ultra-Hi switches further expand the amp’s tonal flexibility, while the onboard compressor and defeatable Optocoupler Limiter help maintain control and consistency under demanding stage conditions.

Its professional connectivity and routing capabilities make the SVT-4PRO exceptionally adaptable for modern live and studio rigs. Stereo operation, mono bridged output, internal 24 dB/octave crossover functionality, dual transformer-balanced DI outputs, dual effects loops, and multiple speaker output options allow the amp to integrate into virtually any professional bass setup.

Whether powering large touring cabinets or complex bi-amped stage rigs, the SVT-4PRO remains one of the most respected high-power Ampeg amplifier heads ever produced.

Key Features

• 1200 Watts RMS bridged at 4 Ohms
• Hybrid tube preamp and solid-state power amp design
• 3 x 12AX7 preamp tubes
• 3-band EQ with 5-position midrange selector
• Switchable 9-band graphic EQ
• Ultra-Lo and Ultra-Hi boost switches
• Variable compressor and defeatable Optocoupler Limiter
• Stereo, mono, and bi-amp operation modes
• Internal 24 dB/octave crossover
• Dual transformer-balanced DI outputs
• Dual effects loops
• 2U rackmount chassis

Key Specifications

• Power Output: 1200 Watts RMS Bridged @ 4 Ohms
• Power Output: 900 Watts RMS Bridged @ 8 Ohms
• Power Output: 600 Watts x 2 Stereo @ 2 Ohms
• Preamp Tubes: 3 x 12AX7
• Graphic EQ: 9-Band
• Rackmount Format: 2U

Full Specifications

• Model: SVT-4PRO
• Series: Pro Series
• Amplifier Type: Hybrid Bass Amplifier Head
• Power Output: 1200 Watts RMS Bridged @ 4 Ohms
• Power Output: 900 Watts RMS Bridged @ 8 Ohms
• Power Output: 600 Watts x 2 Stereo @ 2 Ohms
• Tube Preamp Design
• Solid-State Power Amplifier
• Preamp Tubes: 3 x 12AX7
• 3-band EQ
• 5-position midrange selector
• 9-band graphic EQ
• Footswitchable graphic EQ
• Ultra-Lo boost
• Ultra-Hi boost
• Variable 0–7:1 compressor
• Defeatable Optocoupler Limiter
• Stereo, mono, and bi-amp operation
• Internal 24 dB/octave crossover
• Dual transformer-balanced DI outputs
• Pre/Post DI switching
• Dual effects loops
• 1/4" and Neutrik speakON speaker outputs
• 2U rackmount chassis
• Designed for professional touring and studio bass applications

Why Buy From Rain City Guitars

• Authorized Ampeg dealer in Canada
• Curated selection of professional bass gear
• Every product is professionally inspected before shipping
• Built by musicians, for musicians