Hertz DPower 4 4 Channel Amplifier & 2 Pairs of Hertz DSK 570.3 Dieci Series 5x7" 2-Way Coaxial Speakers bundle includes X1 Hertz DPower-4 D-Class 4 Channel Amplifier 75 WRMS x 4 at 2-Ohm and X2 pairs of Hertz Dieci Series DCX-1653 6.5" Two-Way Coaxial Speakers.

DPower-4:
Features -
The efficient D class circuit delivers 600 W of maximum power within a compact chassis, an essential requirement for in-car integration.
DPower1 bass boost function enhances 45 Hz up to 12 dB to increase subwoofer punch.
The double SPEAKER & RCA INPUTS allows the DPower amplifiers to connect to any type of source, be it OEM or aftermarket.

Specifications -
Distortion - THD (100 Hz @ 4Ω): 0.2 %
Bandwidth: 10 ÷ 30k Hz
S/N Ratio (A weighted @ 1 V): 95 dB
Damping factor (1k KHz @4ohm): 60
Power supply voltage / fuse: 11 ÷ 15 VDC / 1 x 20 A
Idling current (power ON/OFF): 1 A / 0.04 mA
Consumption @ 2Ω, 14.4 VDC (Max Musical Power): 16 A
Remote In: 4 ÷ 15 VDC - 1 mA

DCX-1653:
Features -
Large motor assembly for mobile voice coil control.
Pure copper voice coil, wound on conex former, for maximum lightness.
Water-repellent treated paper cone.
TPU surround, for wide excursion and resonance damping.
Neodymium tweeter with PEI dome, for compactness and energy at high frequencies.
DIN size basket protected by abrasion-proof dust paint.
Tin-plated, high current terminals.

Specifications -
Power Handling - Peak W: 120
Power Handling - Continuous W: 60
Impedance Ω: 4
Frequency response Hz: 60 ÷ 21k
Sensitivity dB SPL: 93
Woofer size mm (in.): 165 (6.5)
Tweeter size mm (in.): 15 (0.6)
Woofer Voice Coil Ø mm (in.): 25 (1.0)

• Package Dimensions ‏ : ‎ 19 x 15 x 9 inches; 17.28 Pounds
• Date First Available ‏ : ‎ November 5, 2021
• Manufacturer ‏ : ‎ Hertz