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Product Description
The PortaPro stereo headphones from Koss provide high-quality audio in a vintage design. Unchanged since 1984, the PortaPro offers a unique and recognizable look with performance to match. The headphones use rigid Mylar drivers to minimize distortion and provide accurate reproduction, while NdFeB magnet structures deliver strong volume levels. Oxygen-free copper voice coils improve signal transmission for clean, clear sound.
The adjustable headband conforms to virtually any head size, while the foam earpads provide comfort and also let you maintain awareness of your surroundings. The cable provides plenty of slack and has a standard 3.5mm mini plug for connecting to MP3 players, CD players, and much more.
The adjustable headband conforms to virtually any head size, while the foam earpads provide comfort and also let you maintain awareness of your surroundings. The cable provides plenty of slack and has a standard 3.5mm mini plug for connecting to MP3 players, CD players, and much more.
| Item Type | |
| Number of Included Headphones/Receivers | |
| Number of Included Transmitters | |
| Headphone | |
| Earpiece Design | On-Ear (Supra-Aural) |
| Earpiece Swivel | No |
| Earpiece Connection / Wearing Style | Headband |
| Foldable | Yes |
| Number of Earpieces | |
| Sound Field | |
| Earpad Size | |
| Driver Type | Dynamic |
| Number of Drivers | |
| Driver Size | |
| Diaphragm | |
| Magnet Type | |
| Voice Coil | |
| Impedance | 60 Ohms |
| Active Noise Cancellation | No |
| Controls/Microphone Location | |
| Full Remote OS Support | |
| Sensors | |
| Contact Pressure | |
| Performance | |
| Frequency Response | 15 Hz to 25 kHz |
| Resonant Frequency | |
| Sensitivity | 101 dB SPL at 1 kHz / 1 mW |
| Matching Tolerance | |
| Maximum Sound Pressure Level (SPL) | |
| Maximum Power Handling | |
| Functional Bias Voltage | |
| Electrostatic Capacitance | |
| Output Power | |
| Volume Limiting | |
| Noise Attenuation | |
| Total Harmonic Distortion (THD) | |
| SNR | |
| CMRR | |
| Channel Separation | |
| Storage Capacity | |
| Number of Mics | |
| Beamforming Support | |
| Type | |
| Diaphragm Size | |
| Mic Boom Location | |
| Pickup Pattern | |
| Noise Canceling | |
| Frequency Response | |
| Operating Voltage | |
| Sensitivity | |
| Maximum SPL | |
| Impedance | |
| SNR | |
| Distortion | |
| Equivalent Noise Level | |
| Wireless Technology | |
| Number of RF Channels | |
| RF Bandwidth | |
| Max Microphones per Band | |
| Wireless Modulation | |
| Latency | |
| Approximate RF Sensitivity | |
| Supported Audio Codecs | |
| Bluetooth Profiles | |
| Bluetooth | |
| Bluetooth Power Class | |
| Wireless Range | |
| Frequency | |
| Bluetooth Transmitter Power | |
| Multipoint Support | |
| Maximum Paired Devices | |
| NFC | |
| Wireless Chipset | |
| True Wireless Pairing Method | |
| Transmitter Host Connection | |
| Encryption | |
| Wired Connectivity | |
| Audio Connector to Source | 1/8" / 3.5 mm TRS |
| Connector Plating | |
| Adapter (Included) | |
| Cable Design | Y-Type |
| Audio Connector to Earpiece | Hard-Wired |
| Cable Length | 4' / 1.2 m |
| Cable Length | |
| Cable Color | Black |
| Cable Conductor Material | |
| Battery Type | |
| Battery Chemistry | |
| Capacity (mAh) | |
| Runtime | |
| Quick Charging Times | |
| Recharge Time | |
| DC Input Power | |
| Wireless Charging | |
| Charging Port | |
| Charging Cable Length | |
| Number of Channels | |
| I/O Connectors | |
| Antenna | |
| Audio Decoding | |
| Number of Charging Ports | |
| AC/DC Power Adapter | |
| AC Input Power | |
| Power Consumption | |
| Additional Runtime | |
| Battery Chemistry | |
| Capacity | |
| Charging Time | |
| Charging Interface | |
| Charging Temperature | |
| Operating Temperature | |
| Storage Temperature | |
| Operating Humidity | |
| Storage Humidity | |
| Physical | |
| Color | Black/Silver |
| Water Resistance | None |
| IP Rating | |
| LED Indicator | |
| Material of Construction | |
| Dimensions | |
| Weight |
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