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DAVEN NEW NOS PRECISION RESISTOR 005 1000 ohms 1 4 watt
$3.99
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DAVEN NEW NOS PRECISION RESISTOR 05 10 ohms 1 4 watt
$3.99
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KEN OHM CF 251 4W+ 5TR Axial 17KOhm 1 4 Watt 5 Through Hole Resistor Qty 100
$4.76
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Ohmite 1356C Resistor 225 Watts 3 Ohms NEW in Factory Box Free Shipping
$24.95
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Ohmite L225J5R0 Resistor 225 Watts 5 Ohms NEW in Factory Box Free Shipping
$24.95
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24 Ohm 1 2 Watt 5 Carbon Film Resistor 100 Piece Lot 293 24 RC
$7.35
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Ohmite L225K5R0 Resistor 225 Watts 5 Ohms NEW in Factory Box Free Shipping
$24.95
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4000 UNITS LOT P N CN2A4TTE270J Resistor 1 16watt 27ohms 5 CONCAVE SQUARE SMD
$99.99
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OHMITE 0415 210 50K 40 RESISTOR 50WATTS 12K OMHS NEW IN BOX
$10.00
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Ohmite 2505 Resistor 300 Watts 25 Ohms E300KR25 NEW in Box Free Shipping
$24.95
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Ohmite 0900B Resistor 225 Watts 10 Ohms NEW in Factory Box Free Shipping
$18.95
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Ohmite C300K2R0 Resistor 300 Watts 2 Ohms NEW in Factory Box Free Shipping
$29.95
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Dale RH 100 100 Watt 750 Resistor RH100
$24.99
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NOS Ohmite 0600A Resistor 100 Watt 5 Ohms New In Box
$24.00
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LOT OF Ten 10 Dale RH 25 Resistor 25W Watt 33 Ohm 33 1 MI9350
$31.50
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50pcs 47 ohm resistor 1 4 watt 1 metal film through hole US Seller
$0.99
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50pcs 390 ohm resistor 1 4 watt 1 metal film through hole US Seller
$0.99
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10 Allen Bradley Carbon Comp Resistor 680 Ohms 1 4 Watt 10
$2.36
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43 Ohm 1 Watt Stackpole Carbon Composition Resistors 10 Pieces Fast USA Ship
$1.05
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10 PC CARBON FILM 1 WATT RESISTORS 47000 ohm 47K + 5 CR 1W 47K
$3.58
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10 PC CARBON FILM 1 WATT RESISTORS 750 ohm 750 + 5 CR 1W 750
$3.58
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10 PC CARBON FILM 1 WATT RESISTORS 3900 ohm 3K9 + 5 CR 1W 3K9
$3.58
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10 PC CARBON FILM 1 WATT RESISTORS 30000 ohm 30K + 5 CR 1W 30K
$3.60
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10 PC CARBON FILM 1 WATT RESISTORS 270000 ohm 270K + 5 CR 1W 270K
$3.58
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10 PC CARBON FILM 1 WATT RESISTORS 470000 ohm 470K + 5 CR 1W 470K
$3.58
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10 PC CARBON FILM 1 WATT RESISTORS 43000 ohm 43K + 5 CR 1W 43K
$3.58
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10 PC CARBON FILM 1 WATT RESISTORS 10 ohm 10 + 5 CR 1W 10
$3.58
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10 PC CARBON FILM 1 WATT RESISTORS 200 ohm 200 + 5 CR 1W 200
$3.58
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10 PC CARBON FILM 1 WATT RESISTORS 680000 ohm 680K + 5 CR 1W 680K
$3.58
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10 PC CARBON FILM 1 WATT RESISTORS 180000 ohm 180K + 5 CR 1W 180K
$3.58
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10 PC CARBON FILM 1 WATT RESISTORS 62 ohm 62 + 5 CR 1W 62
$3.58
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10 PC CARBON FILM 1 WATT RESISTORS 68 ohm 68 + 5 CR 1W 68
$3.58
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5pcs 47 Ohm 5 Watt 5 Wire Wound Cement Resistors New
$4.89
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10pcs Dale 10 Ohm 5 Watt 2 Wire Wound Cement Resistors New
$7.79
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2pcs 2K 2000 Ohm 7 Watt 10 Wire Wound Radial Cement Resistors ROYAL New
$3.79
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10pcs 47 Ohm 5 Watt 5 Wire Wound Cement Resistors New
$8.29
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50pcs 620 ohm resistor 1 4 watt 1 metal film through hole US Seller
$0.99
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NOS Qty 450 Allen Bradley Rc07GF201J 200 Ohm Watt Resistors
$42.99
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Ohmite Power Resistor Wire Wound Ceramic Hollow Core 7100 Ohm 50 Watt RW50W712
$7.54
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TWO ohmite CTG RESISTORs 25 WATTS 1000 OHM 5 NOS
$4.75
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OHMITE L50J15K RESISTOR 50WATTS 15K OHMS NEW IN BOX
$10.00
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OHMITE 0965 210 100M 40 RESISTOR 100WATTS 10K OHMS NEW IN A BOX
$15.00
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OHMITE 0401 L50J250 RESISTOR 50WATTS 250 OHMS NEW IN BOX
$11.00
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Qty 2 Dale Wirewound Resistors 120 ohms 50 watts
$8.00
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2 Watt Metal Oxide Resistors NEW
$1.00
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LS Industrial Systems MCRB ST 600 Watt 33 ohm Resistor New
$109.45
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82K Ohm 1 4 Watt carbon film resistors 10 pcs lot
$0.99
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200 Carbon Film Resistors 10K Ohm 1 4 Watt 5 250V Axial Solder Leads 291 10K RC
$8.99
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Discharge Resistor 1000 Watt 220v Model 0663502 New
$54.45
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200 Carbon Film Resistor 220K Ohm 1 4 Watt 5 250V Axial Solder Lead 291 220K RC
$8.99
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Ohmite L50J15K 50 Watt 15K Ohm Ceramic Resistor INV OF
$24.99
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Allen Bradley Carbon Resistors 75 Ohms 1 4 watt 5 50 pcs RCR07G7R5JS Sealed
$3.75
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Lab Made Switchable 15 3 ohm Load Station 2 Ohmite 0900E 225 Watt Resistors
$15.00
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25x 25pcs 47k 4700 Ohm Metal Film Resistor 1 4 watt 1 tol Fast US Shipping
$2.39
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50x 50pcs 47k 4700 Ohm Metal Film Resistor 1 4 watt 1 tol Fast US Shipping
$3.29
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2pcs BOURNS 3299W 1 101 100 ohm 1 2 5 watt Multi turn Trimmer Resistor 25 turn
$7.75
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4pcs 22k ohm 5 watts 5W 5 Ceramic Cement Power Resistors 5W22k ohm 5W22kJ 22k
$3.97
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10 Pcs Ceramic Cement Power Resistor 5W Watts 1K Ohm 5
$10.59
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NEW BOX OF 25 OHMITE B8J5K0 WIREWOUND RESISTOR 8 WATT 5000 OHMS
$55.00
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10 NOS KOA Brand 15 ohms 7W 7 Watts 5 sandstone wire wound resistors US Seller
$5.69
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10 Draloric carbon film resistors 100 ohms 15W Watts 5 audio grade US Seller
$6.99
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OHMITE D50K1R0 RESISTOR 50WATTS 1 OHMS USED
$12.00
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OHMITE L50J12K RESISTOR 50WATTS 12K OHMS NEW IN BOX
$10.00
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Fixed Resistor P N 5HJ 250 250 OHM 50 WATT
$5.99
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NEW LOT OF 6 MALLORY FIXED RESISTOR 10HJ 100 100OHM 100WATT NEW IN BOX
$59.99
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Schneider Electric VW3A7608R30 Brake Resistor Lexium Accessory 100 OHM 100 Watt
$224.95
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OHMITE L50J2R0 RESISTOR 50WATTS 2 OHMS NEW IN BOX
$20.00
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OHMITE L50J3K0 RESISTOR 50WATTS 3K OHMS NEW IN BOX
$16.00
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OHMITE L50J25R RESISTOR 50WATTS 25 OHMS NEW IN BOX
$18.00
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OHMITE 0401 270 50K 40 RESISTOR 50WATTS 250 OHMS NEW IN BOX
$10.00
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TEKTRONIX TERMINATING RESISTOR 05WATTS 170 B 170 R C1 1 138A
$9.99
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Lot of 1050 Allen Bradley Carbon Comp 1 4 Watt Resistors
$89.95
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OHMITE 0403 L50J750 RESISTOR 50WATTS 750 OHMS USED
$8.00
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200 PC RESISTORS 1 4 WATT 1 METAL FILM SEE VALUE LIST
$8.95
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OHMITE 0962B D100K1K5 RESISTOR 100WATTS 1K5 OHMS NEW IN BOX
$30.00
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NEW LOT OF 3 MALLORY FIXED RESISTOR 10HJ 250 250 OHM 100 WATT NEW IN BOX
$29.99
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LOT OF 16 OHMITE B205300 WIREWOUND RESISTOR 20WATTS 300 OHMS NEW IN BOX
$64.00
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LOT OF 24 OHMITE B20J2K0 WIREWOUND RESISTOR 20WATT 2K OHMS NEW IN BOX
$96.00
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25 x 820 Ohm Carbon Film Resistors 1 4 Watt 5 820R Fast USA Shipping
$3.28
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25 x 27k Ohm Carbon Film Resistors 1 4 Watt 5 2K7 Fast USA Shipping
$3.28
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25 x 39k Ohm Carbon Film Resistors 1 4 Watt 5 39K Fast USA Shipping
$3.28
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25 x 82k Ohm Carbon Film Resistors 1 4 Watt 5 82K Fast USA Shipping
$3.28
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25 x 270k Ohm Carbon Film Resistors 1 4 Watt 5 270K Fast USA Shipping
$3.28
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100 x 820 Ohm Carbon Film Resistors 1 4 Watt 5 820R Fast USA Shipping
$3.62
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100 x 27k Ohm Carbon Film Resistors 1 4 Watt 5 2K7 Fast USA Shipping
$3.62
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100 x 39k Ohm Carbon Film Resistors 1 4 Watt 5 39K Fast USA Shipping
$3.62
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100 x 82k Ohm Carbon Film Resistors 1 4 Watt 5 82K Fast USA Shipping
$3.62
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100 x 270k Ohm Carbon Film Resistors 1 4 Watt 5 270K Fast USA Shipping
$3.62
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Watt Resistor

How Does Cordless Speaker Power Efficiency Influence Sound Quality?

Modern wireless surround sound speakers will naturally squander some level of power they consume. Picking pair of cordless loudspeakers with high power efficiency may minimize the amount of wasted power. Let me clarify a number of little-known details about power efficiency that will help you choose the ideal type.

Several challenges are attributable to wireless loudspeakers that have low power efficiency: Low-efficiency wireless loudspeakers are going to squander some energy as heat and therefore are more expensive to run when compared with high-efficiency types due to their greater energy utilization. Wireless loudspeakers with lower efficiency typically have several heat sinks to help radiate the wasted energy. Heat sinks and fans require space and are expensive. The cordless speakers thus is going to turn out to be pretty big and pricey. In addition heat fans will create running noise. Cordless loudspeakers that have low efficiency cannot be put into tight spaces or within sealed enclosures given that they demand a good amount of circulation.

Low-efficiency versions demand more total power in order to output the same level of audio power as high-efficiency types. As a result they need a bigger power source which makes the cordless loudspeakers more costly to make. An increased level of heat leads to extra stress on components. The lifespan of the cordless speakers might be lowered and reliability can be compromised. High-efficiency wireless loudspeakers in contrast do not experience these problems and may be built small.

You need to try to find the power efficiency figure whilst looking for a set of wireless loudspeakers. The best spot to look is the wireless speakers data sheet. Power efficiency is commonly shown in percent. Different amp architectures deliver different power efficiencies. Class-A amps are amongst the least efficient and Class-D the most efficient. Standard power efficiencies vary from 25% to 98%. From the efficiency percentage you'll be able to calculate how much power the amp is going to waste. An amp having a 50% power efficiency will waste 50 % of the used power. An amp with 90% efficiency will waste 10%.

However, there are several things to note about power efficiency. For starters, this value is dependent on the amount of power that the amp is delivering. Because each amp is going to require a specific amount of power, regardless of the level of energy the amplifier delivers to the speakers, the amplifier power efficiency is higher the more power the amp provides and is normally given for the greatest power the amplifier can handle.

The measurement setup of amplifier power efficiency uses a power resistor that is connected to the amp. The amp itself is being fed a constant-envelope sine-wave tone. Next the energy used by the resistor is measured and divided by the power the amplifier consumes. Normally a full power report is plotted in order to show the dependency of the efficiency on the output power. For this reason the output power is swept through different values. The efficiency at every value is measured plus a efficiency plot created.

Whilst switching (Class-D) amplifiers have amongst the largest efficiency, they tend to have higher audio distortion than analog audio amplifiers and reduced signal-to-noise ratio. Therefore you will have to weigh the size of the wireless loudspeakers against the music fidelity. Then again, digital amps have come a long way and are offering improved music fidelity than in the past. Cordless loudspeakers which make use of Class-T amps come close to the audio fidelity of types which contain analog amplifiers. Subsequently selecting a pair of wireless speakers which utilize switching amplifier with great audio fidelity is now possible.

Watt Resistor
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