Stetsom
Stetsom STX 2436 Bluetooth DSP - Digital Signal Processor, DSP, Equalizer, Exclusive APP, Band Graphic, High Precision Crossover, Filters, Voltmeter, Limiter, Digital Audio Processor
Dayton Audio
Dayton Audio DSP-408 4 Input 8 Output DSP Digital Signal Processor with Built-in EQ, Crossovers, Time Alignment, and Input/Output Mixing for Home and Car Audio
Taramp's
Taramp's Pro 2.6S Digital Signal Processor Equalizer 3-band Graphic Equalization 6 Channels 18K Ohms(RCA) Output Impedance 47 Ohms Limiter Adjustable Car Audio System
NVX
NVX XDSP66BT 6-Channel X-Series 15 Band Parametric EQ Digital Signal Processor (DSP) with 2.75" LCD Display and Includes Bluetooth USB Adapter for Music Streaming