Koss Stereophones - The Original

Transcription

1 2017

2 Koss Stereophones - The Original Ever since I introduced the first SP/3 stereophone back in 1958, Koss Stereophones have been bringing back the excitement of a live performance. Music lovers around the world recognize that dedication to accuracy in sound reproduction as the Sound of Koss. Index John C. Koss Founder and Chairman Over Ear Headphones On Ear Headphones Earbuds & In Ear Headphones Ear Clips Headsets Accessories Pro4AA

3 Over Ear Headphones 4 Pro4S 5

4 The Pinnacle of Audio Reproduction Featuring remarkable power and unmatched sound quality. Electrostatic transducers deliver clean bass and unmatched sound quality Pivoting ear cups and an adjustable/detachable headband ensure ultimate comfort and convenience Straight, dual-entry 4 foot cord with 6 foot extension Includes energizer, battery pack, leather carrying case, connecting cables and 120 VAC adapter Euro plug available 8-35,000 Hz 100k ohms 98 db SPL/1mW Straight, Dual Entry, 4ft/1.2m COMFORT AND CONVENIENCE Pivoting ear cups and an adjustable/detachable headband ensure ultimate comfort and convenience. THE PERFECT PAIR Includes energizer, battery pack, leather carrying case, connecting cables, and 120 VAC adapter. UNBEATABLE SOUND QUALITY Electrostatic transducers deliver clean bass and unmatched sound quality. 6 7

5 Wireless Freedom Powerful personal listening you can take anywhere. BT540i Bluetooth Wireless Stereophone NFC Enabled Koss PLX40 Elements tuned for personal listening Built-in microphone On-board controls Carry case included Playtime (at moderate listening levels): 12+ hrs 10,25,000 Hz 38 ohms 100 db SPL/1mW Straight, Detachable Single Entry, 4.5ft/1.4m 10 8 BT540i 9

6 Made for Music Professionals Perfect functionality, amazingly detailed sound. Pro4S Full-size, over-ear studio headphones D-profile with memory foam cushions Koss SLX40 elements tuned for studio reference Detachable cord with dual choice entry Fold flat for portability Carrying case included Daisy chain audio splitter 10-25,000 Hz 35 ohms 99 db SPL/1mW Coiled, Detachable Single Entry, 4.5ft/1.4m 8 10 Pro4S 11

7 Tune Out and Tune In SP540 Isolating Headphones are tuned specifically for personal listening. SP540 Full size, over-ear isolating headphones D-profile with memory foam cushions Koss PLX40 elements tuned for personal listening Detachable cord Fold flat for portability Carry case included 10-25,000 Hz 35 ohms 99 db SPL/1mW Straight, Detachable Single Entry, 4.5ft/1.4m 12 SP540 13

8 BT539ik Full size, Wireless Bluetooth Over-Ear Headphones Bluetooth 4.0 Technology D-Profile Built-in rechargeable lithium-ion battery Up to 12 hours of playtime (at moderate volume) on one charge Up to 40 hours of standby time on one charge Detachable cord Fold flat for travel Available in dark gray or white 10-20,000 Hz 38 ohms 97 db SPL/1mW Straight, Detachable Single Entry, 4ft/1.2m BT539iw Cut the Cord with the All-New Koss BT539i Wireless Bluetooth Headphones BT539iw Full size, Wireless Bluetooth Over-Ear Headphones Bluetooth 4.0 Technology D-Profile Built-in rechargeable lithium-ion battery Up to 12 hours of playtime (at moderate volume) on one charge Up to 40 hours of standby time on one charge Detachable cord Fold flat for travel Available in dark gray or white 10-20,000 Hz 38 ohms 97 db SPL/1mW Straight, Detachable Single Entry, 4ft/1.2m 14 15

9 PRO4AA Noise isolating professional studio headphones The first dynamic headphones to deliver true full frequency, high fidelity performance Standard-setting design incorporates performance-enhancing technology Superior isolation, accurate sound reproduction and the excitement of a live performance with every recording Durable steel and generously padded rubber headband Adjustable slide bars ensure snug fit 8 foot coiled cord with 6.3 mm (1/4 ) plug 10-25,000 Hz 250 ohms 95 db SPL/1mW Coiled, Single Entry, 8ft/2.4m PRO4AAT Full size noise-isolation studio headphones Closed Pneumalite cushions maximize bass frequencies and isolate ambient noise Oxygen-free copper voice coils improve signal transmission and conduction Adjustable slide bars ensure snug fit for great sound and noise reduction Standard-setting design incorporates performance-enhancing technology and updated style Superior isolation, accurate sound reproduction and the excitement of a live performance with every recording Both 3.5 mm (1/8 ) plug and 6.3 mm (1/4 ) adapter feature gold flashing PRODJ ,000 Hz 250 ohms 95 db SPL/1mW Coiled, Single Entry, 8ft/2.4m PRODJ200 Full size noise-isolating headphones Fold flat into a convenient case for easy portability Transition from stereo to mono with the flick of a switch Two (2) detachable cords 4-foot straight cord with Koss Touch Control (KTC) remote and in-line microphone Koss Touch Control (KTC) remote and microphone technology, made for iphone, ipad and ipod 8-foot coiled cord with 3.5 mm standard plug and 6.5 mm adapter PRO3AAT Increased element rigidity minimizes mechanical distortion and ensures accurate sound reproduction Voice coils improve signal transmission and conduction for cleaner, clearer sound Closed leatherette ear cushions form tight seal around ears to reduce ambient noise and enhance bass Heavy-duty, single-entry 8 foot straight cord affords ample flexibility of movement Includes gold-flashed 3.5 mm (1/8-inch) plug and 6.3 mm (1/4-inch) adapter 10-25,000 Hz 38 ohms 99 db SPL/1mW Coiled, Single Entry, 8ft/2.4m Straight, Single Entry 4ft/1.2m KTC 15-20,000 Hz 60 ohms 100 db SPL/1mW Straight, Single Entry 8ft/2.4m 16 17

10 UR42ik Full size, over-ear headphones Built-in audio splitter D-profile Detachable cord with microphone & remote Dual choice entry Fold flat for travel Available in dark gray or white 20-20,000 Hz 35 ohms 100 db SPL/1mW Straight, Detachable Single Entry, 4ft/1.2m UR42iw Full size, over-ear headphones Built-in audio splitter D-profile Detachable cord with microphone & remote Dual choice entry Fold flat for travel Available in dark gray or white 20-20,000 Hz 35 ohms 100 db SPL/1mW Straight, Detachable Single Entry, 4ft/1.2m 18 UR42i 19

11 QZ5 Neodymium magnet structures deliver outstanding clarity and definition Closed Pneumalite ear cushions and extra-secure headband seal ears, eliminate ambient noise Volume control on ear cup allows easy level adjustment Stereo/mono switch extends user flexibility Includes 8 foot, coiled, single-entry cord with 3.5 mm plug and 6.3 mm adapter TD85 Oxygen-free copper voice coils improve signal transmission and conduction for cleaner, clearer sound Adjustable headband and large leatherette ear cushions for custom fit Steel yokes reinforce overall construction Robust, yet surprisingly lightweight and comfortable, construction Kevlar-reinforced, single-entry 8 foot, coiled cord with gold-flashed 3.5 mm (1/8-inch) plug (L-shaped to minimize cord stress) and gold-flashed 6.3 mm (1/4-inch) adapter Simple, streamlined construction Includes a 4 foot, single-entry straight cord and two-prong airline adapter 40-20,000 Hz 60 ohms 102 db SPL/1mW Coiled, Single Entry, 8ft/2.4 m 20-17,000 Hz 60 ohms 98 db SPL/1mW Coiled, Single Entry, 8ft/2.4 QZ99 Dynamic element delivers accurate acoustic sound reproduction with a wide frequency response Oxygen-free copper voice coils improve signal transmission and conduction for cleaner, clearer sound Closed, leatherette ear cushions form comfortable seal around ears, enhancing bass frequencies and decreasing ambient noise Adjustable headband adapts to any head size and shape for added comfort 8 foot, single-entry coiled cord with 3.5 mm (1/8-inch) plug and 6.3 mm (1/4-inch) adapter Covered under the Koss Stereophones Limited Lifetime Warranty UR40 Full-frequency clean sound turns any recording into a live performance Screened ear cups provide open, hear-through sound letting listeners stay in touch with surroundings Closed leatherette ear cushions form tight seal around ears, enhancing bass response Enjoy greater volume levels, even with low-voltage portable devices Airy mesh sling provides soft, breathable support Lightweight frame (just over 6 oz) folds into protective compact configuration for easy portability Includes a straight, dual-entry 4 foot cord with gold-flashed 3.5 mm (1/8-inch) plug 40-20,000 Hz 60 ohms 102 db SPL/1mW Coiled, Single Entry, 8ft/2.4 m 15-22,000 Hz 60 ohms 98 db SPL/1mW Straight, Dual Entry 4ft/1.2m QZPRO 40-20,000 Hz frequency response offers a full range of deep bass and treble clarity for ultimate sound quality and reproduction Soft vinyl closed ear cushions create a tight seal around ears and reduce ambient noise Active noise reduction technology eliminates unwanted low-frequency noise, creating a peaceful listening environment Fully-collapsible design makes headphones perfect for travel Extra-soft, padded headband delivers lightweight comfort for extended listening sessions Approximately 30 hours of continuous play UR20 Dynamic element for extended frequency response of 30-20,000 Hz Leatherette ear cushions deliver maximum isolation Built for maximum durability Straight, single-entry 8 foot cord 40-20,000 Hz 32 ohms 90 db SPL/1mW Straight, Single Entry 4ft/1.2m 30-20,000 Hz 32 ohms 97 db SPL/1mW Straight, Single Entry, 8ft/2.4m 20 21

12 UR29 Bass-enhanced, high quality sound Enhanced rigidity minimizes mechanical distortion, yielding a full-frequency response Great volume, even with low-voltage portable devices Ear cushions seal comfortably around ears, improving bass performance and blocking outside noise while preventing sound leakage Ear cups collapse into a compact fit for easy storage and travel 18-20,000 Hz 100 ohms 101 db SPL/1mW Straight, Single Entry 8ft/2.4m UR18 Leatherette ear cushions form seal around ears to enhance bass frequencies Headband accommodates all head shapes and sizes for maximum comfort Includes straight, dual-entry 8 foot cord with 3.5 mm (1/8-inch) plug Folds into compact configuration, convenient for storage and portability 25-15,000 Hz 32 ohms 92 db SPL/1mW Straight, Dual Entry, 8ft/2.4m UR23i Unique D-profile mirrors the shape of the ear, to deliver superior sound and fit Koss One-touch Microphone controls your device and answer calls Superior isolation from ultra soft cushions and closed back design brings you closer to the music Straight, dual-entry flat tangle free cord Available in lime, blue, white, and black 20-20,000 Hz 34 ohms 94 db SPL/1mW Straight, Dual Entry, 4ft/1.2m 22 UR32ig OVER EAR HEADPHONES 23

13 On Ear Headphones 24 Porta Pro Classic 25

14 The SP330 s unique new D-Profile rests evenly over the entire ear, perfecting sound, fit, and comfort. SP330 On-ear headphones D-profile with memory foam cushions Koss PLX30 elements tuned for personal listening Detachable cord Fold flat for portability Carry case 20-25,000 Hz 35 ohms 101 db SPL/1mW Straight, Detachable Single Entry, 4.5ft/1.4m 26 SP330 27

15 The Ultimate Portable Headphone Comfort and convenience combined. Porta Pro Classic The ultra portable on-ear headphones Comfort Zone setting on temporal pad for comfortable secure fit The ultimate active headphones with a collapsible headband design for protective storage Dynamic element for extended frequency response Oxygen-free copper voice coils deliver deep bass and signal clarity Includes a convenient carrying case for protective storage 15-25,000 Hz 60 ohms 101 db SPL/1mW Straight, Dual Entry, 4ft/1.2m 28 Porta Pro Classic 29

16 Porta Pro with Mic One-Touch Microphone controls your device and answer calls Comfort Zone setting on temporal pad for comfortable, secure fit The ultimate active headphones with a collapsible headband design for protective storage Dynamic element for extended frequency response Oxygen-free copper voice coils deliver deep bass and signal clarity Includes a convenient carrying case for protective storage Porta Pro KTC Koss Touch Control (KTC) remote and microphone technology, made for iphone, ipad and ipod Comfort Zone setting on temporal pad for comfortable, secure fit The ultimate active headphones with a collapsible headband design for protective storage Dynamic element for extended frequency response Oxygen-free copper voice coils deliver deep bass and signal clarity Includes a convenient carrying case for protective storage 15-25,000 Hz 60 ohms 101 db SPL/1mW Straight, Dual Entry 4ft/12.m 15-25,000 Hz 60 ohms 101 db SPL/1mW Straight, Dual Entry 4ft/12.m KPH30iw Lightweight and portable for active lifestyles The Sound of Koss dynamic audio drivers deliver full spectrum sound Built to last rugged cable system Dynamic element for extended frequency response The perfect fit with patent pending suspension One-touch microphone & remote Available in black and white HB79 Infrared (IR) technology transmits signal to headphones, reproducing audio signal while allowing you to roam freely about the room Dynamic element promotes extended frequency response Compact, lightweight design makes system ideal for extended listening sessions Foam ear cushions keep you in touch with your environment while you listen Adjustable, soft rubber headband provides maximum comfort and customization Transmitter connects to most home systems through 3.5 mm headphone jack or audio output 15-25,000 Hz 60 ohms 101 db SPL/1mW Straight, Dual Entry 4ft/12.m 30-15,000 Hz N/A N/A Cordless KPH30ik Lightweight and portable for active lifestyles The Sound of Koss dynamic audio drivers deliver full spectrum sound Built to last rugged cable system Dynamic element for extended frequency response The perfect fit with patent pending suspension One-touch microphone & remote Available in black and white Sporta Pro Active lightweight travel headphones Dynamic elements deliver deep bass and a wide frequency response Oxygen-free copper voice coils improve signal transmission for cleaner, clearer sound Numerous details for comfort: multi-pivoting ear plates, cushioned pads, foam ear cushions Straight, dual entry 4 foot cord Gold-flashed 3.5 mm (1/8 ) plug 15-25,000 Hz 60 ohms 101 db SPL/1mW Straight, Dual Entry 4ft/12.m 15-25,000 Hz 60 ohms 103 db SPL/1mW Straight, Dual Entry, 4ft/12.m 30 31

17 KTXPRO1 Lightweight, portable headphones with adjustable headband In-line volume control and open, hear-through sound Straight, 4 foot, dual entry cord with 3.5 mm plug and 6.3 mm adapter Titanium layered diaphragm delivers accurate sound reproduction Frequency response delivers high quality sound performance Perfect for at-home and portable use KPH14 Side-firing headphones are designed specifically for active lifestyles and working out Sweat resistant fully adjustable comfort fit headband Dynamic element for extended frequency response Lightweight and non-isolating Available in black, green, blue, violet, and white 15-25,000 Hz 60 ohms 103 db SPL/1mW Straight, Dual Entry 4ft/1.2m ,000 Hz 16 ohms 104 db SPL/1mW Straight, Dual Entry 4ft/1.2m KSC17 Ultra-light behind-the-head sport clip design Great sound quality with maximum portability Constructed from Mylar for enhanced rigidity Improved signal transmission and conduction for cleaner, clearer sound Secure headband won t interfere with activities Volume control on cord allows easy level adjustment UR10 Durable on-ear headphones Over the head design with an adjustable headband Maximum portability with a lightweight design 4-foot cord and 3.5mm plug 40-20,000 Hz 32 ohms 98 db SPL/1mW Straight, Single Entry 4ft/1.2m 60-20,000 Hz 32 ohms 94 db SPL/1mW Straight, Single Entry, 4ft/1.2m KPH25 Lightweight and portable for active lifestyles Equipped with dynamic elements for extended frequency response Collapsible design for maximum portability and storage Over-the-head design with contemporary styling Include a straight, single-entry 4 foot cord with in-line volume control and 3.5 mm (1/8-inch) plug KPH7 On ear headphones with a lightweight design Dynamic element delivering incredible sound performance Straight, 4 foot, dual entry cord with 3.5 mm plug Ideal for listeners seeking ultra-light headphones Available in black, green, red, white, and violet 80-20,000 Hz 32 ohms 94 db SPL/1mW Straight, Single Entry, 4ft/1.2m 80-18,000 Hz 32 ohms 91 db SPL/1mW Straight, Dual Entry, 4ft/1.2m 32 33

18 Earbuds & In Ear Headphones 34 KEB15it 35

19 BT190ic Wireless Bluetooth FitBuds Bluetooth 4.0 Technology Built-in rechargeable lithium-ion battery Sweat Resistant Up to 6 hours of playtime (at moderate volume) on one charge Up to 6 hours of call time (at moderate volume) on one charge Up to 80 hours of standby time on one charge Soft in-ear clips for a secure fit Three sizes of cushions (Small, Medium, & Large) USB cable Available in blue/green, dark gray, white and coral 20-20,000 Hz W 1 Year Warranty Ultra Lightweight Water & Sweat Resistant BT190ib BT190ib Wireless Bluetooth FitBuds Bluetooth 4.0 Technology Built-in rechargeable lithium-ion battery Sweat Resistant Up to 6 hours of playtime (at moderate volume) on one charge Up to 6 hours of call time (at moderate volume) on one charge Up to 80 hours of standby time on one charge Soft in-ear clips for a secure fit Three sizes of cushions (Small, Medium, & Large) USB cable Available in blue/green, dark gray, white and coral 20-20,000 Hz W 1 Year Warranty Ultra Lightweight Water & Sweat Resistant BT190ik Wireless Bluetooth FitBuds Bluetooth 4.0 Technology Built-in rechargeable lithium-ion battery Sweat Resistant Up to 6 hours of playtime (at moderate volume) on one charge Up to 6 hours of call time (at moderate volume) on one charge Up to 80 hours of standby time on one charge Soft in-ear clips for a secure fit Three sizes of cushions (Small, Medium, & Large) USB cable Available in blue/green, dark gray, white and coral BT190iw Wireless Bluetooth FitBuds Bluetooth 4.0 Technology Built-in rechargeable lithium-ion battery Sweat Resistant Up to 6 hours of playtime (at moderate volume) on one charge Up to 6 hours of call time (at moderate volume) on one charge Up to 80 hours of standby time on one charge Soft in-ear clips for a secure fit Three sizes of cushions (Small, Medium, & Large) USB cable Available in blue/green, dark gray, white and coral W 20-20,000 Hz 1 Year Warranty Ultra Lightweight Water & Sweat Resistant 20-20,000 Hz W 1 Year Warranty Ultra Lightweight Water & Sweat Resistant 36 37

20 The Plug Noise isolating in-ear headphones Memory foam ear cushions In-ear headphones expand for custom comfort, improving isolation and high fidelity, and enhancing deep bass and treble clarity Additional soft foam ear cushions included Available in blue, green, orange, red, white, and black 10-20,000 Hz 16 ohms 112 db SPL/1mW Straight, Dual Entry, 4ft/1.2m Sparkplug VC Noise isolating in-ear headphones In-line volume control Memory foam ear cushions In-ear headphones expand for custom comfort, improving isolation and high fidelity, and enhancing deep bass and treble clarity Additional soft foam ear cushions included Available in black and white KEB15ir 10-20,000 Hz 16 ohms 112 db SPL/1mW Straight, Dual Entry, 4ft/1.2m KEB25i Noise isolating in-ear headphones Durable lightweight aluminum construction One-Touch Microphone controls your device and answer calls Soft, foam cushion expands for a custom comfort fit with every listening experience Available in black and white KEB15i Noise isolating in-ear headphones Easily adjust vertical and horizontal fit with the KEB15i s unique 45 degree angled backplate One-Touch Microphone controls your device and answer calls Offset element Innovative angled port ensures the perfect fit at the touch of a finger Available in teal, gray, blue, violet, and red 10-22,000 Hz 16 ohms 111 db SPL/1mW Straight, Dual Entry, 4ft/1.2m 18-20,000 Hz 16 ohms 110 db SPL/1mW Straight, Dual Entry, 4ft/1.2m 38 39

21 KE10 Soft sculpted earbuds Slim and compact design with robust sound Built for long-lasting comfort Available in blue, coral, mint, violet, white and pink KE7 Includes two pairs of earbuds - 1 black and 1 white Perfect accessory for portable use 4-foot straight cord and L plug provide flexibility and reliability for active use Contour frame will fit comfortably and securely for extended use 40-20,000 Hz 32 ohms 100 db SPL/1mW Straight, Dual Entry, 4ft/1.2m 60-20,000 Hz 16 ohms 98 db SPL/1mW Straight, Dual Entry 4ft/1.2m KEB9i Noise isolating in-ear headphones Compact design with robust sound Dynamic element for extended frequency response Include small, medium and large silicone ear cushions for customized fit One-Touch Microphone controls your device and answer calls Available in blue, gray, black, pink, and white KE5i Ultra lightweight Perfect accessory for portable use 4-foot straight cord and L plug provide flexibility and reliability for active use Contour frame will fit comfortably and securely for extended use One-Touch Microphone controls your device and answer calls 18-20,000 Hz 16 ohms 110 db SPL/1mW Straight, Dual Entry, 4ft/1.2m 60-20,000 Hz 16 ohms 98 db SPL/1mW Straight, Dual Entry, 4ft/1.2m KEB6i Noise isolating in-ear headphones Compact design with robust sound Dynamic element for extended frequency response Include small, medium and large silicone ear cushions for customized fit One-Touch Microphone controls your device and answer calls Available in black, white, blue, green, pink, red, and violet KE5 Ultra lightweight Perfect accessory for portable use 4-foot straight cord and L plug provide flexibility and reliability for active use Contour frame will fit comfortably and securely for extended use Available in black and white 16-20,000 Hz 32 ohms 106 db SPL/1mW Straight, Dual Entry, 4ft/1.2m 60-20,000 Hz 16 ohms 98 db SPL/1mW Straight, Dual Entry, 4ft/1.2m 40 41

22 Ear Clip Headphones 42 KSC75 43

23 KSC75 High fidelity clip headphones Exceptionally wide frequency response Computer-optimized neodymium, iron, and boron rare-earth magnet structures deliver amazing clarity at any volume Include a straight, dual entry, 4 foot cord with gold-flashed 3.5 mm (1/8 ) plug Pivoting clips promise accommodating fit Enjoy greater volume despite low-voltage portable devices 15-25,000 Hz 60 ohms 101 db SPL/1mW Straight, Dual Entry 4ft/1.2m KSC22i KSC32igry Dynamic element for extended frequency response of 60-20,000 Hz Sport Clip design fits comfortably around the ear One-Touch Microphone controls your device and answer calls Ultra-lightweight comfort Customizable fit Straight, dual-entry 4 foot cord 60-20,000 Hz 16 ohms 98 db SPL/1mW Straight, Dual Entry 4ft/1.2m KSC32i FitClips Ultra lightweight earclip headphones New in-ear ported design Elements rest comfortably in ear to create noise isolating seal Soft flexible clips rest comfortably around the ear One-Touch Microphone controls your device and answer calls Includes three pairs of silicon ear tips for optimum comfort and noise isolation Available in blue, coral, gray, and violet KSC21 Clips comfortably over ears Open hear-through sound allows listeners to stay connected to surroundings Ultra-lightweight comfort Straight, dual-entry 4 foot cord Available in black and white 15-20,000 Hz 160 ohms 104 db SPL/1mW Straight, Dual Entry 4ft/1.2m 50-18,000 Hz 16 ohms 36 db SPL/1mW Straight, Dual Entry 4ft/1.2m 44 45

24 Headsets 46 SB42 47

25 SB42 USB Single, USB plug for quick headset connection Headset with detachable electret noise reduction microphone for hands-free communication from your PC Ideal for PC voice applications, interactive gaming and speech recognition Dynamic element for extended frequency response Foam ear cushions for open, hear-through sound Adjustable headband for a great fit Electret noise canceling microphone 20-20,000 Hz (headset) ,000 Hz (microphone) USB Straight, Single Entry 8ft/2.4m SB42 Full range of sound brings games to life Headset with detachable electret noise reduction microphone for hands-free communication from your PC Dynamic element delivers high sensitivity and reduced distortion for premium sound Improved signal transmission and conduction for cleaner, clearer sound Ear cushions create balanced, open, hear-through sound, maximizing comfort and evenly distributing sound Independent 3.5mm plugs for easy headphone and microphone connection 8 foot cord maximizes movement Electret noise canceling microphone 20-20,000 Hz 35 ohms 100 db SPL/1mW Straight, Single Entry 8ft/2.4m 3.5 mm 48 SB42 49

26 GMR-540 ISO Closed-back design creates a realistic environment for an expansive experience 2 Cords included - Detachable electret boom mic & In-line mic with remote The Sound of Koss dynamic audio drivers deliver full spectrum sound Sling headband for lightweight comfort D-profile creates the perfect fit Dynamic element delivers high sensitivity and reduced distortion for premium sound Improved signal transmission and conduction for cleaner, clearer sound Ear cushions create balanced, open, hear-through sound, maximizing comfort and evenly distributing sound Independent 3.5mm plugs for easy headphone and microphone connection 8 foot cord maximizes movement 3.5 mm 15-22,000 Hz 60 Ohms 101 db SPL Straight, Single Entry 8ft/2.4m GMR-545 AIR GMR-540 ISO Immerse Yourself with the All-New Koss GMR-540 ISO and GMR-545 AIR Immersive Gaming Headphones Open-back design creates a realistic environment for an expansive experience 2 Cords included - Detachable electret boom mic & In-line mic with remote The Sound of Koss dynamic audio drivers deliver full spectrum sound Sling headband for lightweight comfort D-profile creates the perfect fit Dynamic element delivers high sensitivity and reduced distortion for premium sound Improved signal transmission and conduction for cleaner, clearer sound Ear cushions create balanced, open, hear-through sound, maximizing comfort and evenly distributing sound Independent 3.5mm plugs for easy headphone and microphone connection 8 foot cord maximizes movement 3.5 mm 15-22,000 Hz 60 Ohms 101 db SPL Straight, Single Entry 8ft/2.4m 50 GMR545 AIR 50 BT539i 51

27 EARBUDS & IN EAR HEADPHONES 7 CS100 USB Single, USB plug for quick headset connection Headset with electret noise reduction microphone for hands-free communication from your PC Ideal for PC voice applications, interactive gaming and speech recognition Dynamic element for extended frequency response Foam ear cushions for open, hear-through sound Adjustable headband for a great fit 30-20,000 Hz 32 ohms 91 db SPL/1mW Straight, Single Entry 8ft/2.4m CS100 Full range of sound brings games to life Dynamic element delivers high sensitivity and reduced distortion for premium sound at all volume levels Improved signal transmission and conduction for cleaner, clearer sound Ear cushions create balanced, open, hear-through sound, maximizing comfort and evenly distributing sound Independent 3.5mm plugs for easy headphone and microphone connection 8 foot cord maximizes movement Electret noise canceling microphone 30-20,000 Hz 32 ohms 91 db SPL/1mW Straight, Single Entry 8ft/2.4m 52 CS100 HEADSETS 53

28 CS95 USB Single, USB plug for quick headset connection Headset with electret noise reduction microphone for hands-free communication from your PC Ideal for PC voice applications, interactive gaming and speech recognition Dynamic element for extended frequency response Foam ear cushions for open, hear-through sound Adjustable headband for a great fit SB45 USB Single, USB plug for quick headset connection Communication headset Noise-reduction Clear Voice Technology (CVT) Premium sound at all volume levels Anisotropic ferrite magnet structures deliver high sensitivity and reduced sound distortion Experience absolute comfort with soft, leatherette ear cushions Collapsible for compact storage 30-20,000 Hz 32 ohms 91 db SPL/1mW Straight, Single Entry 8ft/2.4m 18-20,000 Hz 100 ohms 103 db SPL/1mW Straight, Single Entry 8ft/2.4m CS95 SB45 Single-sided listening Headset with electret noise reduction microphone for hands-free communication from your PC Ideal for PC voice applications, interactive gaming and speech recognition Dynamic element for extended frequency response Foam ear cushions for open, hear-through sound Adjustable headband for a great fit Multimedia headset Noise-reduction Clear Voice Technology (CVT) Premium sound at all volume levels Anisotropic ferrite magnet structures deliver high sensitivity and reduced sound distortion Independent 3.5mm plugs for easy headphone and microphone connection Experience absolute comfort with soft, leatherette ear cushions 30-20,000 Hz 32 ohms 91 db SPL/1mW Straight, Single Entry 8ft/2.4m 18-20,000 Hz 100 ohms 103 db SPL/1mW Straight, Single Entry 8ft/2.4m SB40 Noise canceling microphone Full range of sound brings games to life Microphone eliminates excessive background noise for greater ease of use with PC voice applications, such as speech recognition Soft leatherette ear cushions envelop ears for long-lasting comfort and maximum isolation without excess pressure Adjustable headband fits most head sizes Independent 3.5mm plugs for easy headphone and microphone connection SB ,000 Hz frequency response delivers full range of sound to bring games to life Oxygen-free copper voice coils improve signal transmission and conduction for crystal-clear sound Volume control on cord makes volume adjustment easy Soft leatherette ear cushions envelop ears without pressure for long-lasting comfort Clear Voice Technology (CVT) noise-reduction microphone eliminates excessive background noise for greater ease of use with PC voice applications, such as speech recognition Independent 3.5mm plugs for easy headphone and microphone connection Folds up for compact storage and convenient travel 20-20,000 Hz 120 ohms 96 db SPL/1mW Straight, Single Entry 8ft/2.4m 18-20,000 Hz 100 ohms 103 db SPL/1mW Straight, Single Entry 8ft/2.4m 54 55

29 Accessories 56 BTS1 57

30 EARBUDS & IN EAR HEADPHONES 7 BTS1 Bluetooth Speaker BTS1 Bluetooth Speaker Share your music, everywhere Wireless Aux Input, Output Directional or omni-directional sound On-board Controls Designed and engineered to deliver the Sound of Koss Available in black or white Option to daisy chain 58 59

31 The Original American Stereophone Company