AKG K 550 MKII Dynamic headphones

With the K550s, AKG engineers have struck a masterful balance between the noise-isolating qualities of closed-back headphones and the spacious, dimensional sound of an open-back design creating reference-class headphones ideal for private listening both at home and on the go. 50mm drivers, the largest in our product line, deliver great AKG sound from your hi-fi system or virtually any portable device.The large ear cups and new headband design ensure an amazingly comfortable fit, and the 2D-axis mechanism folds flat to stow or go.

• Professional hi-fi stereo studio headphones
• Semi-open, circumaural design
• Self-adjusting headband for optimum fit
• Patented Varimotion speakers
• Leatherette ear pads and velvet ear pads
• Single-sided, detachable 3 m cable and additional 5 m coiled cable

HSD 171 without cable

Professional headset with hypercardioid, shock mounted, speech optimized,
dynamic microphone. Main application: Live sound use. The microphone?s
frequency range is 60-17,000 Hz with a sensitivity of 1 mV/Pa (-60 dBV).
Impedance is 600 ohms. The headphone?s impedance is 55 ohms with an
audio bandwidth of 18-26,000 Hz. Type: supra-aural, closed-back with self-adjusting
headband. Microphone arm is swivelling through 270 degrees for left or right-hand
use with integrated mute switch.
Net/shipping weight: 255/725g (9/25.4 oz.)

Designed for professional audio engineers and in-studio talent, SRH940 Headphones from Shure deliver accurate response across the entire audio spectrum for smooth high-end extension with tight bass.

Superior transient response provides minimal distortion. The collapsible, lightweight design with premium padded headband offers superior comfort and portability. Two included detachable cables (straight and coiled) and a replacement set of velour ear pads ensure a long product life.

Also includes a hard zippered travel case and a threaded 1/4" (6.3) mm gold-plated adapter.



Accurate frequency response delivers smooth high-end extension with tight bass, and superior transient response for minimal distortion
Lightweight, ergonomic fit with premium padded headband provide maximum comfort over extended periods
Closed-back, circumaural design rests comfortably over the ears and reduces background noise
Collapsible design with 90-degree swivel ear cups for convenient storage and portability
Legendary Shure quality to withstand the rigors of everyday use
Bayonet Clip securely locks cable into ear cup
Replaceable velour ear pads included to ensure long product life and maximum comfort
Two included detachable cables (coiled & straight) provide flexible wearing options and easy replacement
Zippered hard travel case protects headphones when on the go or not in use




Sensitivity
100 dB/mW
lmpedance
42 Ω
Frequency Range
5 Hz - 30 kHz
Weight
11 oz (320 g)

Cable Length
Coiled: 9.84 ft (3 meters), detachable Straight: 8.2 ft (2.5 meters), detachable
Cable Style
Detachable oxygen-free copper
Plug
Gold-plated 1/8" (3.5 mm) stereo mini jack

•     Semi - Open
•     Innovative bass refelx system
•     Rugged headband cosntruction
•     Single-sided coiled cable
•     Soft headband pad
•     Gold plated stereo mini jack (3.5mm) and 1/4" adapter
•     Transducer type: Dynamic
•     Frequency response: 5 - 35,000 Hz
•     Nominal impedance: 250 ohm
•     Nominal SPL : 96 dB
•     T.H.D: < 0.2%
•     Power handling capacity: 100 mW
•     Sound coupling to ear: Circumaural
•     Weight (without cable) 295 g