The unmistakable punch, definition, and flexibility of a legendary hybrid bass amplifier Modeled after the legendary Hartke HA3500* bass amplifier Nembrini Audio Bass 3500 captures the powerful low end, fast transient response, and distinctive hybrid preamplifier design of the original amplifier. Key Features Hybrid Preamp: Independently blend Tube and Solid State stages to combine harmonic warmth, clarity, definition, and punch. Built-In Compressor: Controls peaks, evens out dynamics, and adds weight and consistency to the bass signal. The activity LED provides visual feedback for compression and limiting. Ten-Band Graphic Equalizer: Provides ±15 dB adjustment at 30 Hz, 64 Hz, 125 Hz, 250 Hz, 500 Hz, 1 kHz, 2 kHz, 3 kHz, 5 kHz, and 8 kHz. Contour Controls: Broad Low Pass and High Pass controls shape the low-frequency region around 100 Hz and the upper-frequency region around 10 kHz. Pre-Amplifier Stomp Effects: Noise Gate, Envelope Filter, Octaver, and Modern Tubes Drive. Every pedal is draggable and reorderable for complete signal-chain customization. Cabinet and Recording Chain: Four bass cabinet emulations, four microphone models, adjustable microphone positioning, tweeter controls, parallel D.I. processing, and three ambience environments. Dual Impulse Loader: Load and blend up to two third-party impulse responses with level, pan, phase, Solo, and Mute controls. Six-Band Parametric Equalizer: Detailed post-amplifier tone shaping with multiple filter types, adjustable frequency, gain, and Q. Post-Amplifier Effects: Studio Compressor, bass-optimized Modulation, and Analog Delay. Every effect is draggable for flexible routing. Cabinet Bypass: Bypasses the complete cabinet, recording chain, and impulse-loader section for use with external cabinet processors, IR loaders, or a real power amplifier and bass speaker system. PEDALS Four bass-focused stomp effects: Noise Gate, Envelope Filter, Octaver, and Modern Tubes Drive everything from clean control to synth-style lows and warm saturation. Each effect can be dragged to customize the signal order. CABINETS Choose from four bass cabinets and four microphone models, with adjustable mic placement and tweeter controls. Blend the cabinet signal with a processed D.I. channel and three ambience environments. IR LOADER Load and blend up to two third-party impulse responses. Each slot includes level, pan, phase, Solo, and Mute controls. EQUALIZER A six-band parametric equalizer provides precise post-amplifier tone shaping, with multiple filter types and adjustable Frequency, Gain, and Q. POST EFFECT Studio Compressor, bass-optimized Modulation, and Analog Delay complete the signal chain. Each effect is draggable for flexible routing. Legal Disclaimer Hartke HA3500 is a registered trademark of Samson Technologies Corp. NA Bass 3500 was developed by Nembrini Audio SRL based on its modeling techniques. Samson Technologies Corp. has not endorsed nor sponsored the NA Bass 3500 in any manner, nor licensed any intellectual property for use in this product.