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The TPT-SP4BT is a compact Bluetooth-enabled digital signal processor (DSP) for car audio systems. Designed for both factory and aftermarket installations, it allows wireless control of audio settings from a smartphone or tablet. With its intuitive app, users can adjust equalization, filters, gain, phase, and limiting in real time, delivering precise audio tuning. Ideal for enthusiasts and professional installers, this DSP provides high flexibility, improved sound clarity, and simplified system optimization without requiring physical access to the unit.

Key Benefits

• Wireless Bluetooth control for convenient adjustments from Android or iOS devices.
• 15-band graphic equalizer for precise frequency shaping.
• Configurable crossovers (high-pass and low-pass) with Butterworth and Linkwitz-Riley options up to 36 dB/oct.
• Adjustable output gain from −45 dB to +15 dB for compatibility with various amplifiers.
• Sequencer with three remote outputs to manage amplifier and component power.
• Diagnostic and tuning tools: battery voltage monitor, test tone generator, frequency sweep, and pink noise.
• Delay and phase adjustment for optimized stereo imaging and system alignment.
• Adjustable limiter to protect speakers and prevent distortion.
• Low power consumption (~170 mA) for safe and efficient operation.

Technical Specifications

• Inputs: 2 × RCA (A + B) or 2 × high-level (A + B)
• Outputs: 4 independent channels
• Graphic Equalizer: 15 bands, ±12 dB gain
• Crossovers:
• Butterworth: 12 / 18 / 24 / 36 dB/oct
• Linkwitz-Riley: 12 / 18 / 24 / 36 dB/oct
• Output Gain: −45 dB to +15 dB per channel
• Frequency Generator: 10 Hz – 22 kHz, −60 dB to 0 dB
• Battery Voltage Monitor: current, min, and max voltage
• Frequency Response: 10 Hz – 22 kHz
• Max Input Voltage:
• RCA: 5.6 Vpp
• High-level: 15 Vpp
• Max Output Voltage: 5.6 Vpp
• Power Supply: 10–15 V DC
• Sequencer Output Max Current: 180 mA per channel
• Nominal Current Draw: ~170 mA at 12.6 V DC
• Bluetooth Range: ~15 meters
• Compatibility: Android 5.0+ and iOS 12+
• Dimensions: 7.40″ L × 3.80″ W × 1.30″ H
• Weight: 0.40 lb (~181 g)

Installation & Compatibility

The TPT-SP4BT installs easily in limited spaces due to its compact design. It supports both RCA and high-level inputs, making it compatible with factory or aftermarket radios. The 4-channel output can drive multiple amplifiers, and the built-in sequencer allows controlled power-up of other components. For best performance, ensure a stable 10–15 V DC power source and use the smartphone app for Bluetooth configuration and tuning.

FAQS

• What is a DSP with Bluetooth in car audio?
  A Bluetooth DSP allows users to tune their system wirelessly, offering EQ control, time alignment, and audio correction. It’s a powerful upgrade for achieving precision sound in any vehicle.
• Why should I choose a DSP with Bluetooth over a traditional DSP?
  Bluetooth models offer easier tuning from your phone, faster adjustments, and more flexibility. They’re great for people who want professional-level control without using a laptop or wired interface.
• How do I install a Bluetooth DSP in my car?
  Installation requires routing signal inputs, connecting outputs to your amps, and setting power/ground. Once connected, you can pair your phone and fine-tune your system through the manufacturer’s app.
• Can a Bluetooth DSP improve factory audio systems?
  Absolutely. A DSP with Bluetooth can transform stock speakers by correcting frequency response and improving clarity. It’s one of the best upgrades for achieving cleaner, more dynamic sound.