Buy TIC CORPORATION AS P60B Indoor/Outdoor 60-Watt Speakers with 70 Volt Switching (Black)TIC CORPORATION AS P60B Indoor/Outdoor 60-Watt Speakers with 70 Volt Switching (Black) Product Description:
- 5.25-Inch Full-Range, 60W 2-Way Speakers
- 8 Ohm and 70V Switchable For Commercial Installations
- High-Density, Low-Resonance Cabinetry
- Brass Central Mounting Or Bracket Options
- Aluminum, Powder-Coated Grill
Product Description
Black indoor/outdoor speakers.
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10 of 11 people found the following review helpful.
70V line outdoor rated speakers
By HMMWV
This is definitely not your typical speaker system, although it can be configured that way with the transformer selector switch set to the 8 ohm position. The speakers do come with mounting brackets, gold plated wire connectors, and have an 8 ohm mode for use with conventional amplifiers. The tap transformer (more on this later) maxes out at 10 watts.For those unfamiliar with "70 volt line speakers" and amplifiers, read on, for those who use 70V line systems just skip to the last paragraph as I explain why these speakers have a wattage knob on the back.Most people never get experience using 70V line speaker systems as they are not used on home stereos where all speakers are within a few feet of the amplifier. Good quality heavy gague speaker wire prevents loss here When trying to run long distances between the amplifier and multiple speakers such as an office paging system or an outdoor sound system the high voltage (70 Volts) line method has an advantage just as high voltage does for home power distribution. The concept is the same - by using transformers at both the amplifier and speaker you avoid costly losses in long distance wire runs.Most high end home amplifiers have outputs to drive 4 ohm or 8 ohm speakers and connect quite simply. In a 70V line speaker system there are 3 distinct differences:1 - the amplifier's output has a step up transformer that provides a nominal 70 VAC output instead of expecting an 8 ohm speaker load. The output may be any type of 2 wire connector and is marked "70V line"2 - multiple (10 or more) speakers can be connected simply to this pair of wires without substantial loss. There is no need to run special high grade wire to 70V speaker systems, 22ga wire is more than adequate for small systems. Speakers can be wired easily with all the positive or red terminals connected together and the same for the black or negative terminals. This can not be done with a normal home amplifier system using conventional 8 ohm speakers as each one added would double the work on the amplifier until it failed.3 - Although most 70V systems are mono, two or more amplifier systems can be installed to provide stereo or multichannel sound to larger venues. In really large outdoor venues up to a half mile long, delay lines may be incorporated so that the sound arrives to the listener at the same timeThe volume, or technically the power delivered to each speaker is adjusted at each speaker using a dial or switch on the speaker, often marked in watts from 0.5W to 10 or more watts. In an office paging system this makes it convenient to setup quiet speakers in cubicles and loudspeakers in warehouse spaces or noisy machine rooms. The central amplifier volume adjustment is usually left fixed. The main amplifier is chosen based on its power rating which should be more than the sum of the speaker settings connected to it.For example, a small office has 10 ceiling speakers set to 1Watt, a shop with a 5 watt speaker, and a warehouse with a 20watt bullhorn type speaker. Multiply the 10 office speakers by 1 watt each, they consume 10W off the 70V line, add in the 5 and 20 watt speakers for the noisy areas and your speaker load is 35W, so a 100 watt amplifier would provide room to spare and not be overloaded.These spakers have a unique selector that in addition to the wattage adjustments for 70V use, they also have an 8 ohm setting for use with conventional amplifiers. The materials are damp-proof but for outdoor mounting they should be kept out of direct rain such as mounting under the eaves. With this combination of features you can extend your livingroom stereo outside or use the same speaker for office paging systems. Their professional construction and brackets are excellent features all the way around.
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