JBL Northridge vs Magnat Quantum speakers test

JBL Northridge E100 modded speakers versus Magnat Quantum 907 3-way floorstanding loudspeakers. The JBL E100 came out in around 2004, a new pair of these back then cost almost $1000 and almost three times more expensive Magnat Quantum 907 try beat these upgraded jbl e100 speakers. To power up JBL speakers in bi-amping, I use Kenwood KA-660 stereo amplifier for bass and Pioneer M-73 for mid and high frequency drivers. Magnat speakers connect to one amplifier un single cable way and amp for Magnat is Yamaha AX-550 natural sound integrated stereo amplifier. Sound source is Topping Dx3 pro USB DAC. HQ speaker cable on Aliexpress: Spike set on Aliexpress Bluetooth Receiver on Aliexpress: HQ speaker cable on Amazon: Spike set on Amazon: Specification of Magnat Quantum 907: - Configuration: 3 way bassreflex - Frequency Response: 20Hz – 75kHz - Power Handling (RMS/Max): 250/400W - Sensitivity: 91 dB - Recommended amplifier output: more than 50 watts - Nominal Impedance: 4-8 Ohms - Drive Unit Complement: 2x17 woofer / 1x17 midrange / 1x2.5 tweeter - Dimensions (WxHxD) 114,5x23x34,5 cm - Weight (Individual): 31,8 Kg JBL E100 Technical specifications: - FREQUENCY RESPONSE: 33 - 20 000 Hz - PRINCIPLE: 3-way bass reflex - SPEAKER DRIVERS: 2 x 10" woofer 1 x4" midrange 1 x 3/4" tweeter - POWER HANDLING (RMS/MAX.): 250 / 500 Watts - IMPEDANCE: 8 Ohms - CROSSOVER FREQUENCIES: 1000Hz, 5000Hz - RECOMMENDED AMPLIFIER OUTPUT: not more than 250 Watts - SENSITIVITY (2.8V/1M): 91dB - WEIGHT...