Hertz ES F25.4 Energy

Hertz ES F25.5

25 cm Flach-Subwoofer aus der Hertz Energy Serie
4 Ohm Schwingspule
Belastbarkeit 250 Watt RMS

Technische Daten Hertz ES F25.5

Size mm (inch) 250 (10?)
Power handling W peak 500
cont. program 250
Impedance O 4
Frequency response Hz 30 ÷ 300
Sensitivity dB/SPL 92
Outer Diameter mm (inch) 256 (10? 1/16)
Mounting Diameter mm (inch) 231 (9? 1/8)
Total Depth mm (inch) 94 (3? 11/16)
Mounting Depth mm (inch) 83 (3? 1/4)
Magnet size mm (inch) 140 (5? 1/2)
Total Driver Displacement l (ft³) 0,7 (0,025)
Weight of one component kg (lb) 3,3 (7,26)
Voice Coil Diameter mm (inch) 60 (2? 3/8)
Magnet material: High density flux ferrite
Cone material: Water repellent pressed paper
*X-mech mm (inch) 13 (1/2?) (* Xmech: maximum mechanic excursion; indicates the maximum linear motion range of the speaker in both directions.)

Electro-Acoustic Parameters Hertz ES F25.5
D mm 215
Xmax mm 6
Re O 3
Fs Hz 37
Vas l 42,9
Mms g 82,0
Cms mm/N 0,23
BL T m 10,4
Qts 0,48
Qes 0,52
Qms 5,58
Spl dB 92

The Energy subwoofers ES F20.5 and ES F25.5 are the ideal solution for those who look for a subwoofer of compact size, yet providing powerful and engaging sound. At its highest excursion point, the Ultra Flat profile reaches 86 mm height for the 200 mm subwoofer, and 94 mm height for the 250 mm subwoofer, with a maximum power of 400 W and 500 W respectively. Care has been put into every detail of the design and building of these subwoofers, to ensure high mechanical quality as well as efficient thermal capability, to the benefit of bursting dynamics and startling power handling. Robust ferrite magnet motor assembly, pressed-paper cone, Back Vented Spider Support and copper voice coil, wound on aluminium former, are only some of the unique features of the Energy Flat subwoofers. The linear and solid design of the Energy ES F20.5 and ES F25 is enhanced by the ultra flat profile as well as by the Hertz logo on the dust-cap, making their cosmetics suitable to any installation.

1. Ultra Flat design, for maximum installation flexibility.
2. Massive motor assembly, for perfect control under high power, high excursion conditions.
3. Water-repellent pressed paper cone.
4. Copper voice coil, wound on aluminium former, for startling thermal and mechanical capacity.
5. Back Vented Spider support, for perfect symmetry under high excursion and thermal dissipation.
6. Wide-wave, resin-bonded fi ber spider for mechanical reliability and consistent parameters.
7. High current, tin-plated terminals.
8. Silver plated lead wires for maximum reliability and conductivity.
9. Basket and motor coupled and damped through special epoxy glue.
10. High thermal dissipation and magnetic permeability plates, providing constant, even flux.