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A HP LaserJet 4000n printer. The LaserJet 4000/4050 and their respective variants were the first printers released in the 4000 series. The LaserJet 4000 series printers print letter paper at 17 pages per minute, and can be set to print at 600 dpi or 1200 dpi, although when set to print at true 1200 dpi, the printer runs at reduced speed.
A rotary woofer is a subwoofer-style loudspeaker which reproduces very low frequency content by using a conventional speaker voice coil's motion to change the pitch (angle) of the blades of an impeller rotating at a constant speed. The pitch of the fan blades is controlled by the audio signal presented to the voice coil, and is able to swing ...
From about 1900 to the 1950s, the "lowest frequency in practical use" in recordings, broadcasting and music playback was 100 Hz. [9] When sound was developed for motion pictures, the basic RCA sound system was a single 8-inch (20 cm) speaker mounted in straight horn, an approach which was deemed unsatisfactory by Hollywood decisionmakers, who hired Western Electric engineers to develop a ...
Computer speakers, or multimedia speakers, are speakers sold for use with computers, although usually capable of other audio uses, e.g. for an MP3 player. Most such speakers have an internal amplifier and consequently require a power source, which may be by a mains power supply often via an AC adapter , batteries, or a USB port.
The volume of air between the speakers has no acoustic effect on the cabinet space so that the saved space is less than 50%. Other aspects are unchanged like resonant frequency and maximum SPL. The new driver will have the same resonant frequency, Qts, excursion, etc. as one driver with the same applied signal.
As the table shows, the bass manager directs bass frequencies from all channels to one or more subwoofers, not just the content of the low-frequency effects (LFE) channel. However, when there is no subwoofer, the bass manager directs the LFE channel to the main speakers. This is the only time the LFE channel would not be sent to
The Sharp PC-4500 is a line of laptop computers released by Sharp Corporation in 1987. The line comprises the PC-4501, the PC-4502, and the PC-4521. The PC-4501 is a bare-bones unit with only 256 KB of RAM stock, only one floppy drive, no backlighting, and no built-in numeric keypad; the PC-4502 and PC-4521 bumps the stock RAM to 640 KB and includes the latter two features while providing ...
It is a formidable challenge for an amplifier, subwoofer speakers, and cabinet to reproduce these sound effects at a high volume without encountering problems such as power amplifier clipping (distortion), unwanted rattle or resonance in the wooden cabinet, or excessive "chuffing" sounds from the bass reflex vent (if a vent or port is used in ...