I have found 2 Pioneer TS-W307D4 and have found a Pyle PLA2678 end stage that I liked on ebay.com. Here are the data of the end stage: RMS Power @ 4 Ohms: 2×240 W RMS Power @ 2 Ohms: 2×480 W Bridgeable RMS Power @ 4 Ohms: 1×4000 W Maximum Power Output 2 x 2000W 2 Channel Bridgeable MOSFET Amplifier Frequency Response 20 Hz-50kHz (±3dB) Output Power @ 14.4v DC, 50Hz 2 Ohm Stable MOSFET Power Supply PWM ( Pulse-Width-Modulation ) System Glass Epoxy PCB Silver RCA Inputs Custom Terminal Block fo r Speaker Connection Thermal / Overload / Short Circuit Protection Input Impedance: 47K Ohms Soft Turn On/ Off Advanced Protection Circuitry S/N Ratio: >90dB Dimensions:10.24”W x 2.21”H x 16.14”L And because with me the woofer before playing on 2 ohms whom you normally attach without a bridge (says what if I make a mistake) because I have two spuds of the 4 ohms I connected paralel and then I get 2 ohm. And according to my thoughts I think that I only closed the woofer normally because if I can get the 2 ohm bridge then I get 1 ohm but that can’t be because most end stages to 1 ohm are not stable. So the question is someone has to finish with the end stage not that there is 2 ohm: 2 x 480 W but really it’s only 2 x 150 W. And if someone has a good advice which end stage is good for the Pioneer woofer then it just says. And is it better to take 2 monoblock end stages or a end stage for both woofer. So was pleased if I had a few infor They could help me further. Thank you very much in advance_!!!