AIR DISTRIBUTION UNITS PNEUMATICALLY

Brand Owner (click to sort) Address Description
ALPHA DOG INDUSTRIAL Alpha Dog Advantage 638 English Mountain Rd Newport TN 37821 Air distribution units for pneumatically driven pumps; Air filters for pneumatic controls being part of machines; Air powered tools, namely, pneumatic pumps, pneumatic torque guns, drills, impact drills; Bending machines for metalworking; Blow torches, namely, gas operated cutting torches; Compressing machines; Cutting machines for metalworking; Electric arc welding machines; Electronically and power-operated tools, namely, pullers and components therefor, nut splitters, extractors, separators, spanners and coil spring compressors; Extensions for power tools; Gas welding machines; Hand-held battery actuated hydraulic crimp tool; Hydraulic jacks; Hydraulic power packs; Hydraulic power units; Hydraulic torque wrenches; Hydraulic valve actuators; Hydraulically actuated tools, namely, cylinders, pumps, jacks, nut splitters, pullers, cutters, crimpers, Toughlift systems, torque wrenches, bolt tensioners; Lifting jacks other than hand-operated; Motors and pumps for refrigerators and freezers; O-rings being machine parts for cylinders, jacks, hydraulic torque wrenches, hydraulic pumps, nut splitters, cutters, crimpers; Oil hydraulic presses for metalworking; Pneumatic air preparation equipment, namely, airline filters, lubricators, and regulators, all being parts of machines; Pneumatic controls for machines, motors and engines; Pneumatic jacks; Pneumatic nut runners; Pneumatic pumps; Pneumatic ratchet wrenches; Pneumatic shears; Pneumatic valve actuators; Power-operated hand-held crimpers; Power drill bit extensions; Power drills; Power tools, namely, drills, impact drills, pullers, cutters, crimpers, battery torque guns; Stands for hydraulic jacks;Maintenance and/or repair of hydraulic cylinders, nut splitters, hydraulic/pneumatic torque wrenches, hydraulic/pneumatic pumps; Pump repair; Pump repair and maintenance; Pump repairing; Rental of hand and power tools; Rental of pneumatic or hydraulic construction machines, tools and apparatus; Rental of pneumatic or hydraulic machines, tools and apparatus for use in construction;
ASECESA ZHAO, Tongjie Wanming Village, Beibaixiang Town, Yueqing City, Zhejiang 325600 China Air distribution units for pneumatically driven pumps; Air powered tools, namely, screwdrivers; Fluid power component kit for machine control comprising pumps and valves; Machine parts, namely, cylinders; Machine parts, namely, mechanical seals; Machines and lines composed thereof for the production of automobile parts, parts for the aforementioned machines, particularly foaming lines, die-cutting machines, molding presses, scoring machines, laminating machines, water jet cutting machines, milling machines, long fiber injection machines, parts for the aforementioned machines, particularly foaming tools, die-casting tools, die-cutting tools, molding tools, laminating tools; Parts and attachments for weaving machines and for weaving looms, and weaving machine parts, namely, weft-yarn selecting units, warp-typing machines, hand knotting and splicing machines, cam motion machines for weaving looms, dobbies, Jacquard looms, Jacquard and dobby cads, selvedge and false selvedge apparatus for weaving looms, automatic exchange systems consisting primarily of warp and cloth beam and quick-style change loom harnesses, beams and beam flanges for weaving looms, reeds, reed cleaning and brushing machines, healds, heald frames, harnesses, temples, cones, tubes and pirns for weaving, pickers and lug straps, flexible rapier tapes, grippers for weaving looms, cutters for weaving machines, rapier machines, yarn feeders, weft feeders, yarn deflectors, warp stop motions, weft stop motions, weft accumulators, stands and creels for weaving loom accessories; Parts for compressed-air machines, namely, pressure switches and sensors for monitoring, controlling, and switching hydraulic or pneumatic systems sold as an integral component of injection molding machines; Parts for compressed-air tools, namely, brakes, filters, hoses, pipes, couplings valves, switches, compressors, clamping tools and injectors; Parts for pneumatic blow guns, namely, inflator tips, inflator valves, valve adapters, nozzles, nipples, couplers, connectors and pivots; Parts of oilfield wellhead machines, namely, gate valves, ball valves, check valves, plug valves, globe valves, choke and manifold industrial pumps, pump and valve parts, pipe fittings and flanges; Pneumatic air preparation equipment, namely, airline filters, lubricators, and regulators, all being parts of machines; Pneumatic valve actuators; Pressure transducers and transmitters that convert hydraulic or pneumatic pressure into analog electrical signals for monitoring and controlling hydraulic or pneumatic systems sold as an integral component of injection molding machines; Self-lubricating mechanical friction parts, especially of composite materials, namely, wear rings, washers, bushings, spherical bearings, bearing pads, sliding blocks and machine transmission gears all for load bearing machines, conveyors, handling trucks and machines, lifting machines, agricultural machinery, construction equipment machines and hydraulic turbines;
ATO ATO INC. 23555 GOLDEN SPRINGS DR. K-1 DIAMOND BAR CA 91765 Air distribution units for pneumatically driven pumps; Alternators; Brakes for industrial machines; Centrifugal pumps; Gear motors not for land vehicles; Hydraulic pumps and motors for hydrostatic systems, comprised of pumps, motors, valves, switches, sensors and electronic controls, for hydraulic drives and force transmission in machines, machine tools, grinding and food processing machines and in off-road-vehicles; Industrial robots; Inverter motors not for land vehicles; Machine parts, namely, cylinders; Servo-drives for motors; Servo-motors; Soft starters for motors; Speed change gears being parts of machines; Submersible pumps; Variable frequency drives for motors, other than for land vehicles;AUTOMATION TECHNOLOGIES ONLINE;
ATO.COM ATO INC. 23555 GOLDEN SPRINGS DR. K-1 DIAMOND BAR CA 91765 Air distribution units for pneumatically driven pumps; Alternators; Brakes for industrial machines; Centrifugal pumps; Gear motors not for land vehicles; Hydraulic pumps and motors for hydrostatic systems, comprised of pumps, motors, valves, switches, sensors and electronic controls, for hydraulic drives and force transmission in machines, machine tools, grinding and food processing machines and in off-road-vehicles; Industrial robots; Inverter motors not for land vehicles; Machine parts, namely, cylinders; Servo-drives for motors; Servo-motors; Soft starters for motors; Speed change gears being parts of machines; Submersible pumps; Variable frequency drives for motors, other than for land vehicles;AUTOMATION TECHNOLOGIES ONLINE;
AZZKOR Huizhoushi Ruiyingchang GongMao Co., LTD Fl 1, No.150, No.6, Zhongkai 6th Rd Chenjiang, Zhongkai high tech Zone Huizhou, Guangdong 516006 China Air distribution units for pneumatically driven pumps; Air filters for pneumatic controls being part of machines; Air powered tools, namely, screwdrivers; Compressed air machine components, namely, cylinders, valves and air grips; Cylinders for machines; Electric soldering apparatus; Machine parts, namely, cylinders; Oil-water separators for pneumatic controls being part of machines; Parts for compressed-air tools, namely, brakes, filters, hoses, pipes, couplings valves, switches, compressors, clamping tools and injectors; Parts for pneumatic blow guns, namely, inflator tips, inflator valves, valve adapters, nozzles, nipples, couplers, connectors and pivots; Pneumatic linear actuators; Pneumatic pipe-bursting machinery and auxiliary supportive devices used in the installation or replacement of utility pipe lines, cable lines, pipe tunnels and underground utility systems; Pneumatic valve actuators; Pressure switches and sensors for monitoring, controlling, and switching hydraulic or pneumatic systems being sold as a unit with manufacturing machines; Valves being parts of machines operated pneumatically and by air;The wording AZZKOR has no meaning in a foreign language.;
CITYUP NINGBO HOPE AUTO ACCESSORIES CO., LTD. NO.98 HUTANG, QUNLI VILLAGE YANGMING STREET, YUYAO CITY NINGBO, ZHEJIANG 315400 China Air distribution units for pneumatically driven pumps; Blowing machines for the compression, exhaustion and transport of gases; Compressed air machines; Compressed air pumps; Compressors for machines; Dust exhausting installations for cleaning purposes; Pumps as parts of machines, motors and engines; Pumps for machines; Scissors, electric; Vacuum cleaners;CITY UP;
HNJPC Huang, Benwang Daxing Village, Beibaixiang Town Yueqing, Zhejiang 325000 China Air distribution units for pneumatically driven pumps; Air filters for mechanical purposes; Compressed air machine components, namely, cylinders, valves and air grips; Machine parts, namely, cylinders; Parts for pneumatic blow guns, namely, inflator tips, inflator valves, valve adapters, nozzles, nipples, couplers, connectors and pivots; Pneumatic valve actuators; Valves as machine components; Valves being parts of machines operated pneumatically and by air; oil, gas, air filters for motors and engines;The wording HnJpc has no meaning in a foreign language.;
HOMEFIO HUANG,JUNZHOU JINHAI ROAD 25 Zhongxixiangtiwan 2D-2303 Shenzhen 518102 China Air distribution units for pneumatically driven pumps; Car washing installations; Coffee grinders, other than hand-operated; Electric coffee grinders; Electric fruit presses; Electric glue guns; Electric milk frothers; Hand-held vacuum cleaners; Power-operated spray guns; Soldering irons, electric; Spray guns for painting; Vacuum cleaners for household purposes; Water aeration systems comprising water pumps, air compressors and air blowers;Caps for toy pistols; Infant swings; Play mats for the purpose of putting together puzzles; Stress relief exercise toys; Target games; Toy aircraft; Toy guns; Toy scooters and accessories therefor; Toy water guns;HOME FIO;Bed blankets; Bed linen; Bed pads; Bed sheets; Bed spreads; Bed throws; Children's blankets; Children's bed sheets, pillow cases, and blankets; Eiderdown covers; Eiderdowns; Mattress covers; Quilt covers; Silk blankets; Towelling coverlets; Silk bed blankets;
INTELLIPUMP STI (ABC) 1738 BELMAR BOULEVARD BELMAR NJ 07719 Air distribution units for pneumatically driven pumps for mattresses;INTELLI PUMP;
KITLABS Shenzhen Chengbei Trading Co., Ltd 22R,Bldg4,Hekang Garden(Lecheng),No.7559 HenggangSection,Longgang Ave,Yuanshan St Longgang Dist,Shenzhen 518000 China Air distribution units for pneumatically driven pumps; Cleaning appliances utilizing steam; Cordless vacuum cleaners; Dish washing machines; Electric drills; Electric food blenders; Electric ice crushing machines; Electric steam mops; Electrically-powered kitchen appliance for dicing, mincing, slicing and chopping food; Electronically and power-operated tools, namely, pullers and components therefor, nut splitters, extractors, separators, spanners and coil spring compressors; Food waste disposers; Fruit core removing machines; Hair shearing machines for animals; Lawnmowers; Pneumatically operated tire inflation machine; Power drill bit extensions; Power drills; Screwdrivers, electric; Vacuum cleaners for household purposes; Wet-dry vacuums;KIT LABS;
LULU HOME GIONA 5045 W Jefferson Blvd Los Angeles CA 90016 Air distribution units for pneumatically driven pumps; Coffee extracting machines; Electric scissor sharpeners; Electric scissors; Automated pet appliances, namely, feeders and waterers; Compressed air pumps; Water aeration systems comprising water pumps, air compressors and air blowers;The name(s), portrait(s), and/or signature(s) shown in the mark does not identify a particular living individual.;HOME;
MOER SKY Hubei Meinuohonghui Commercial & Trading Co. Ltd. Family Planning Service Station, Maping Guangshui 432700 China Air distribution units for pneumatically driven pumps; Containers for use with mechanical spreaders, namely, cartridges, bags, and pouches for seed, lawn fertilizers, pesticides and other chemicals; Electric juicers; Electric arc welding apparatus; Electric food blenders; Electroplating machines; Filter silencers for machines; Filters for motors and engines; Hand-held vacuum cleaners; Lawn mowers; Packing machines under vacuum; Power-operated tools, namely, lawn and garden edgers; Printing presses; Washing machines for clothes; Wrapping machines; Electric clothing pressing machines for commercial dry cleaning and laundry purposes including shirt press, collar and cuff press, utility press, legger press, drapery press, pants topper, mushroom topper and puff iron;
NANPU Zhejiang Nanpu Pneumatic Components Co.,Ltd changchun village,liushi town yueqing, zhejiang 325604 China Air distribution units for pneumatically driven pumps; Air filters for pneumatic controls being part of machines; Gas-operated blow torches; Machine parts, namely, joints and joint parts for connecting sliding strips, plates and guides; Oil-water separators for pneumatic controls being part of machines; Pressure switches and sensors for monitoring, controlling, and switching hydraulic or pneumatic systems being sold as a unit with manufacturing machines; Pressure switches and sensors for monitoring, controlling, and switching hydraulic or pneumatic systems sold as an integral component of injection molding machines; Replacement parts for machines, namely, replacement parts for trench excavators, drag-line excavators, hoisting machines, locomotive cranes, shoveling machines, power shovels and log handling machines, namely, chassis parts, hydraulic and pneumatic parts; Valves being parts of machines operated pneumatically and by air; Parts for pneumatic blow guns, namely, inflator tips, inflator valves, valve adapters, nozzles, nipples, couplers, connectors and pivots;The wording NANPU has no meaning in a foreign language.;
OKAY MOTOR OKAY MOTOR PRODUCTS HANGZHOU INC. ROOM 210, BLDG. ONE, CAIHE JIAYE BLDG. JIANGGAN DISTRICT, HANGZHOU CITY ZHEJIANG PROVINCE 310000 China Air distribution units for pneumatically driven pumps; Automobile engine valve covers; Automotive intake manifolds; Electric fans, ventilators and blowers for motors and engines; Electronic ignitions for vehicles; Emission reduction units for motors and engines, namely, EGR valves; [Hydraulic pumps and motors for hydrostatic systems, comprised of pumps, motors, valves, switches, sensors and electronic controls, for hydraulic drives and force transmission in machines, machine tools, grinding and food processing machines and in off-road-vehicles; Nitrogen oxide traps for exhaust systems being parts of internal combustion engines;] Valves as machine components; Variable frequency drives for motors, other than for land vehicles; Vehicle engine parts, namely, oil coolers;MOTOR;
PUDUSI ZHEJIANG NANPU PNEUMATIC CO,.LTD Changchun Village, Liushi Town, Yueqing, Zhejiang 325604 China Air distribution units for pneumatically driven pumps; Air filters for pneumatic controls being part of machines; Gas-operated blow torches; Machine parts, namely, joints and joint parts for connecting sliding strips, plates and guides; Oil-water separators for pneumatic controls being part of machines; Parts for pneumatic blow guns, namely, inflator tips, inflator valves, valve adapters, nozzles, nipples, couplers, connectors and pivots; Pneumatic air preparation equipment, namely, airline filters, lubricators, and regulators, all being parts of machines; Pressure switches and sensors for monitoring, controlling, and switching hydraulic or pneumatic systems being sold as a unit with manufacturing machines; Replacement parts for machines, namely, replacement parts for trench excavators, drag-line excavators, hoisting machines, locomotive cranes, shoveling machines, power shovels and log handling machines, namely, chassis parts, hydraulic and pneumatic parts; Valves being parts of machines; Parts for compressed-air machines, namely, pressure switches and sensors for monitoring, controlling, and switching hydraulic or pneumatic systems sold as an integral component of injection molding machines;The wording PUDUSI has no meaning in a foreign language.;
SZMP Shenzhen Jusheng Electronic Co.,Ltd. D-2F,27th Bldg,Liantang Industrial Park Shangcun Community,Gongming,Guangming Shenzhen 518000 China Air distribution units for pneumatically driven pumps; Beer pumps; Centrifugal pumps; Compressed air pumps; Fuel dispensing pumps for service stations; Fuel pumps for land vehicle engines; Fuel pumps for land vehicles; Lubricating pumps; Oil pumps for land vehicles; Oil pumps for use in motors and engines; Pumps as parts of machines, motors and engines; Suction pumps; Vacuum pumps; Valves being parts of machines; Valves for pumps; Variable speed scroll compressors for air conditioners and heat pumps; Water pumps for land vehicles; Pumps for machines;
SZSXHX Shenzhen Xinhuixin International Trade Co., Ltd 402 building 8, Wutongshanxinju 122 Pangshan Road.,Liantang sub dist.,Luohu District SHENZHEN 518001 China Air distribution units for pneumatically driven pumps; Air hammers; Car washing installations; Core drilling bits; Dust removing installations for cleaning purposes; Exhausts for motors and engines; Food chopping machines for commercial use; High-pressure pumps for use in oil or gas well hydraulic fracturing operations; High pressure washers; Machines for processing plastics; Paint sprayers; Valves being parts of machines; Veneer manufacturing machines; Washing machines for household purposes; Wood lathes; Yarn stretching machines;
TABACN Yueqing Yisheng Pneumatic Co., Ltd. 502, Bldg.5, Xiangxie Jinyuan, No. 28, Yuejin Rd., Chengnan St., Yueqing, Wenzhou, Zhejiang 325600 China Air distribution units for pneumatically driven pumps; Air filters for pneumatic controls being part of machines; Compressed air machine components, namely, cylinders, valves and air grips; Oil-water separators for pneumatic controls being part of machines; Parts for compressed-air machines, namely, pressure switches and sensors for monitoring, controlling, and switching hydraulic or pneumatic systems sold as an integral component of injection molding machines; Parts for pneumatic blow guns, namely, inflator tips, inflator valves, valve adapters, nozzles, nipples, couplers, connectors and pivots; Pneumatic air preparation equipment, namely, airline filters, lubricators, and regulators, all being parts of machines; Pneumatic blow guns for use in a manufacturing process to blow dust off parts, workstations or wherever necessary; Pneumatic controls for machines, motors and engines; Pneumatic valve actuators; Replacement parts for machines, namely, replacement parts for trench excavators, drag-line excavators, hoisting machines, locomotive cranes, shoveling machines, power shovels and log handling machines, namely, chassis parts, hydraulic and pneumatic parts; Valves being parts of machines operated pneumatically and by air;The wording TABACN has no meaning in a foreign language.;
TAYPC Yueqing Wanming pneumatic Co.,Ltd changchun village, liushi town, Yueqing, Zhejiang 325604 China Air distribution units for pneumatically driven pumps; Air filters for pneumatic controls being part of machines; Gas-operated blow torches; Machine parts, namely, joints and joint parts for connecting sliding strips, plates and guides; Oil-water separators for pneumatic controls being part of machines; Pressure switches and sensors for monitoring, controlling, and switching hydraulic or pneumatic systems being sold as a unit with manufacturing machines; Pressure switches and sensors for monitoring, controlling, and switching hydraulic or pneumatic systems sold as an integral component of injection molding machines; Replacement parts for machines, namely, replacement parts for trench excavators, drag-line excavators, hoisting machines, locomotive cranes, shoveling machines, power shovels and log handling machines, namely, chassis parts, hydraulic and pneumatic parts; Valves being parts of machines operated pneumatically and by air; Parts for pneumatic blow guns, namely, inflator tips, inflator valves, valve adapters, nozzles, nipples, couplers, connectors and pivots;The wording TAYPC has no meaning in a foreign language.;
TEKOLA Chen, Lin No. 47, Huanxi Road, Daitou Village Xinan Town, Chenghai District Shantou City,Guangdong 515832 China Air distribution units for pneumatically driven pumps; Electric pumps; Fluid power component kit comprising hose and fittings for use in machinery; Fluid power component kit for machine control comprising pumps and valves; Machines for processing plastics; Parts for pneumatic blow guns, namely, inflator tips, inflator valves, valve adapters, nozzles, nipples, couplers, connectors and pivots; Power-operated ratchet wrenches; Pump control valves; Pumps for machines; Storage machinery, namely, a vertical hoist for raising and storing recreational equipment, sporting goods and household items elevated from ground level; Tractor-towed baseball infield drag mats; Valves for pumps; Wood and metal machinery, namely, Tractor; Electrically-powered steam cleaning device comprising a hose and nozzle and a vapor-producing chamber that is attached to a water source;The name(s), portrait(s), and/or signature(s) shown in the mark does not identify a particular living individual.;The English translation of Tekola in the mark is It doesn't work.;
UJEFF Qingdao Dukeheng Trading Co., Ltd Room 1803, unit 1, building 1 No. 1068 Jinshui Road, Licang District Qingdao 266000 China Air distribution units for pneumatically driven pumps; Electric pumps; Electrically-powered steam cleaning device comprising a hose and nozzle and a vapor-producing chamber that is attached to a water source; Fluid power component kit comprising hose and fittings for use in machinery; Fluid power component kit for machine control comprising pumps and valves; Machines for processing plastics; Parts for pneumatic blow guns, namely, inflator tips, inflator valves, valve adapters, nozzles, nipples, couplers, connectors and pivots; Power-operated ratchet wrenches; Pump control valves; Pumps for machines; Storage machinery, namely, a vertical hoist for raising and storing recreational equipment, sporting goods and household items elevated from ground level; Tractor-towed baseball infield drag mats; Valves for pumps; Wood and metal machinery, namely, Pumps for machines;The name(s), portrait(s), and/or signature(s) shown in the mark does not identify a particular living individual.;The wording UJEFF has no meaning in a foreign language.;
UNI-FLO WILDEN PUMP AND ENGINEERING 22069 Van Buren Street Grand Terrace CA 92313 air distribution units for pneumatically driven pumps;UNIT-FLOW;
VANNECT SHENZHEN ZHUOLI SUOTENG ELECTRONICS CO., LTD. 4TH F,BLDG.B,ZHANGBEI ERCUN INDUSTRIAL, ZONE,SHAHE RD.,AILIAN,LONGCHENG ST., LONGGANG DIST.SHENZHEN 518000 China Air distribution units for pneumatically driven pumps; Electric arc welding apparatus; Gas-operated soldering irons; Injection moulding machines; Lifting jacks other than hand-operated; Oil filter adapters; Oil filters; Polishing discs for automated wet-polishing multi-head machines; Shears, electric; Soldering apparatus, gas-operated; Soldering irons, electric; Soldering irons, gas-operated; Spray guns for paint; Compressed air pumps; Electric pumps; Electric soldering apparatus; Electric wax-polishing machines for household purposes; Elevator chains being parts of machines; Hydraulic jacks; Pads for floor polishing machines; Pneumatic jacks; Power jacks; Power-operated chain-type trenching machines for digging trenches; Rice or barley polishing machines; Roller chains being parts of machines; Silt pumps;
VANNECT Shenzhen Wanlian International Trading Co., Ltd. Room 401,Boyuan Building,Zhiwuyuan Road 259th,Longgang Street,Longgang District, Shenzhen City 518000 China Air distribution units for pneumatically driven pumps; Electric arc welding apparatus; Gas-operated soldering irons; Injection moulding machines; Lifting jacks other than hand-operated; Oil filter adapters; Oil filters; Polishing discs for automated wet-polishing multi-head machines; Shears, electric; Soldering apparatus, gas-operated; Soldering irons, electric; Soldering irons, gas-operated; Spray guns for paint; Compressed air pumps; Electric pumps; Electric soldering apparatus; Electric wax-polishing machines for household purposes; Elevator chains being parts of machines; Hydraulic jacks; Pads for floor polishing machines; Pneumatic jacks; Power jacks; Power-operated chain-type trenching machines for digging trenches; Rice or barley polishing machines; Roller chains being parts of machines; Silt pumps;
VEKEN ShenZhen BuXiang Network Technology Co.,Ltd. Room 1302, A2 Building 3009 Guangming Road, Guangming District Shenzhen 518000 China Air distribution units for pneumatically driven pumps; Car washing installations; Coffee grinders, other than hand-operated; Electric coffee grinders; Electric fruit presses; Electric glue guns; Electric milk frothers; Electrical coffee grinders; Hand-held vacuum cleaners; Power-operated coffee grinders; Power-operated spray guns; Soldering irons, electric; Spray guns for painting; Vacuum cleaners for household purposes; Water aeration systems comprising water pumps, air compressors and air blowers;The wording VEKEN has no meaning in a foreign language.;
WOODMADS Dongguan XingYi Network Technology Co.,Ltd. Room 1004, Building 3, No. 14, Industrial South Road Songshan Lake Park Dongguan, Guangdong 523000 China Air distribution units for pneumatically driven pumps; Cemented carbide cutting tools; Laser engraving machines; Milling machines; Roller bearings for machines;WOOD MADS;The wording WOODMADS has no meaning in a foreign language.;
 

Where the owner name is not linked, that owner no longer owns the brand

   
Technical Examples
  1. A remote-controlled audio system comprises sets of loudspeakers (14A-14D) connected to power amplifier units (22A-22D) in an audio distribution unit (10) to which several audio sources, such as a compact disc unit, a tape deck, etc., are connected. Remote units (34) are provided, one in each zone with a set of loudspeakers. The loudspeakers and the remote unit are connected to the audio distribution unit by four wires whereby audio and data signals and power are transmitted to the loudspeakers and the remote unit, respectively. Each power amplifier unit may have a pair of power amplifiers, each connected to one of the loudspeakers in the set, referenced to a first ground (1) and a second ground (2), respectively. The second ground (2) is maintained at a prescribed voltage relative to the first ground. The remote unit (34A) is connected between the "ground" terminals of the two loudspeakers of the set, i.e. those connected via the speaker cables to the first and second grounds in the audio distribution unit. The remote unit has a transmitter unit which transmits control signals to the audio distribution unit via the "ground" cables. In the audio distribution unit, an interface circuit connected between the grounds conveys the control signals to a control device which adjusts the settings of the audio distribution unit in dependence thereupon. The remote units may receive power from the audio distribution unit via the transmission channel to supply their internal components.