Loudspeakers and my problem

Huhu dear car community, for a short time I am owner of a 4th channel power amp, a Hifonics box and 2 Kenwood speakers (I write data down the same). I connected the box and power amp and this also works perfectly, my problem are now the speakers. Yes they are on the hat rack (but that doesn’t matter to me). If I connect these extra, then they give me a rush of themselves. The seller still has to buy a Y-Chinch verb My question is: What did I do wrong? Why can’t I do that? So here’s the details: Sub: Hifonics Titan TX10R Bass Reflex Case 350 Watt RMS Load capacity 700 Watt MAX Load capacity 4 Ohm Impedance Amplifier: Renegade REN1100S MK3 Music power (max.) 4 x 275 W RMS Power 4 x 75 W RMS brushed 2 x 550 W Impeda nz 4 ? Principle 4-channel radio: PIONEER DEH-1600UBB Number of preamplifier outputs: 2 Subwoofer connection: yes Connections: AUX IN, Direct Sub Drive, USB IN, Cinch preamplifier output Number of channels: 4 Output power/channel: 50 watts High pass filter: yes Low pass filter: yes Noise suppression: yes So ich denk ich habe alles. Bitte echt um Hilfe, da ich sonst verschwuer hab noch bildchen wie es jetzt ist. Ich freue mich echt über schnellige und helpfule Antworten. MfG Schaumi