u can use U connector but usually it fits in most amps...

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Car Sound system:
HU: **New** Ural CDD
Speaker: CDT ES-620, crossover: ES-200US, Tweeter: DRT-26 (silk) et TW-24 (silk soft)
Subwoofers: 2 x CDT ES-SQ-1200
Ampli sub: Elemental Design NIne.1 (1200W rms @ 1 ohm)
Ampli Speaker: Elemental Design NIne.2x ( 200 W rms @ 4 ohm )
RCA: Monster Cable 402XLN
Insonorisation: Portes avants et coffre arrière au B-Quiet Extreme
Power: Batterie Otpima Yellow top D35
Wiring: 0 Ga wire

Everything being installed with love an passion and a old lovely Toyota Cressida 89...