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2. Electrical characteristics of dynamic loudspeakers - Wikipedia

   en.wikipedia.org/wiki/Electrical_characteristics...

   Sixteen ohm drivers (or loudspeakers systems) would be connected to the 16-ohm tap, 8 ohm to the 8 ohm tap, etc. This is significant since the ratio between the loudspeaker impedance and the amplifier's impedance at a particular frequency provides damping (i.e., energy absorption) for the back EMF generated by a driver.

3. Fender Champ - Wikipedia

   en.wikipedia.org/wiki/Fender_Champ

   Available as a 10" combo, features an internal 8 ohm speaker; some with output jack, some hardwired; Hand-wired eyelet fiberboard; 18 watt RMS; Controls: volume (pull for lead), treble (pull for mid boost), bass, reverb, lead level, master. 1-input, 2-channel; 1× 7025, 1× 12AT7, 1× 6C10 Triple triode Compactron and 2× 6V6; Solid-state diode ...

4. Constant-voltage speaker system - Wikipedia

   en.wikipedia.org/wiki/Constant-voltage_speaker...

   Constant-voltage speaker systems are also commonly referred to as 25-, 70-, 70.7-, 100 or 210-volt speaker systems; distributed speaker systems; or high-impedance speaker systems. In Canada and the US, they are most commonly referred to as 70-volt speakers. In Europe, the 100 V system is the most widespread, with amplifier and speaker products ...

5. Fender Hot Rod DeVille - Wikipedia

   en.wikipedia.org/wiki/Fender_Hot_Rod_DeVille

   An external speaker jack is located next to the output tubes in the back and allows the signal to be heard out of both the amplifier itself and the speakers to which it is connected (which must have a 4- or 8-Ohm impedance). The DeVille features a 60-watt valve amplifier with three 12AX7 preamp valves and two 6L6 output valves. Its circuitry ...

6. Loudspeaker - Wikipedia

   en.wikipedia.org/wiki/Loudspeaker

   A horn-loaded speaker can have a sensitivity as high as 110 dB at 2.83 volts (1 watt at 8 ohms) at 1 meter. This is a hundredfold increase in output compared to a speaker rated at 90 dB sensitivity and is invaluable in applications where high sound levels are required or amplifier power is limited.

7. Wharfedale MACH - Wikipedia

   en.wikipedia.org/wiki/Wharfedale_MACH

   Impedance: 8 Ohms; Power handling: 100 Watts; Recommended amplifier power rating: 10-100 Watts; Frequency range: 55 Hz to 22 kHz (DIN45500) Frequency range (±3dB): 62 Hz to 17 kHz; Sensitivity: 94dB for 1 Watt at 1 metre (Anechoic) Computer optimized bass loading