PreSonus Eris-series studio monitors are used worldwide by audio engineers who need to hear every detail of their recordings. Ideal for gaming and home video production, the Eris E4.5 BT employs the same technology as the larger Eris models to deliver studio-quality sound, with a smooth and accurate frequency response. Yet they’re compact enough to fit almost anywhere. Components and construction 4.5-inch (114 mm) woven composite low-frequency transducer 1-inch (25 mm), ultra-low-mass, silk-dome, high-frequency transducer Rear-firing acoustic port for superior bass-frequency reproduction Optimized, resonance-suppressing internal bracing User controls High- and low-frequency tuning controls Front-panel Volume control for speakers and headphone amplifier Bluetooth pairing button Power and safety 50 watt (25W/side), Class AB bi-amplification RF interference, output current limiting, over-temperature, transient, and subsonic protection Amplifier “soft start” feature eliminates popping on power-up Internal power supply with IEC connector Power switch with on/off LED Inputs and outputs Stereo Bluetooth 5.0 wireless input Balanced ¼-inch TRS, unbalanced 1/8-inch stereo, and RCA inputs Integrated stereo headphone amplifier with front-panel 1/8-inch output ProductsStudio SpeakersMedia Reference MonitorsEris E4.5 Technical Specifications Inputs Bluetooth 5.0 1- Stereo 1/8" 2- Balanced ¼” TRS 2- Unbalanced RCA Performance Frequency Response 70 Hz - 20 kHz Crossover Frequency 2.8 kHz Amplifier Power 25W/speaker LF Driver 4.5" HF Driver 1” silk dome Peak SPL (@ 1 meter) 100 dB Input Impedance 10 kΩ User Controls Volume Range A-type taper MF Control Variable (-6 to +6 dB, center 100 Hz) HF Control Variable (-6 to +6 dB, center 10 kHz)