What is the difference between active noise cancelling and passive isolation?

Passive isolation is just the shape of the headphone: in-ear tips or over-ear pads physically block sound. Active noise cancelling (ANC) also listens to your surroundings through microphones and generates an opposing wave, so it works best on steady drone — a plane, a bus, ventilation. ANC does very little against sudden sounds such as speech.

How long do wireless earbuds really last on one charge?

In-ear buds usually play for 4–8 hours, and the case adds another two to four full charges. Over-ear headphones last 20–40 hours. High volume, ANC and cold weather all cut into that — in winter expect roughly a fifth less.

Can I use one pair with both my phone and my computer?

Yes, if the headphones support multipoint: they stay connected to two devices at once and switch by themselves when a call starts on the computer. Without multipoint you have to disconnect one device manually every time.

8” 2-Way Ceiling Speaker, White

Description

8” Ceiling Speaker for Indoor Use 2-way ceiling speaker with a robust 8” Woven Glass Fiber cone woofer and a 0.75" titanium dome tweeter in a co-axial arrangement. The Woven Glass Fiber cone helps provide high-quality, long-lasting sound that will bring movie action and music vocals to life. The 0.75 inch titanium dome tweeter offers the smoothest high frequency response .The high-grade rubber edge allows for true audio accuracy and quality that will last. Suitable for indoor use.

Features:

The speaker is designed for optimal performance in a wide variety of home entertainment applications, from providing relaxed background music to a high impact home theater system. The sophisticated crossover works to deliver deep bass and exceptional top-end frequency response. Woven Glass Fiber Cone Woofer enables extended bass output & durability under high-stress conditions for delivering realistic accurate lows. The titanium dome tweeter reproduces high frequencies with extreme accuracy. Butyl Rubber Surround: for longevity and excellent bass performance. Efficient and quick installation using improved swing-out dog legs and a frameless design. Micro edge magnetic grills provide for an unobtrusive appearance while allowing these speakers to fit beautifully in any interior design. The ±3 dB sound adjustment allows you to tailor the sound to the room and personal preference. The protective grille offers additional protection against dust and damage.

Specifications:

Speaker type: Passive Ceiling Speaker. Nominal power (RMS): 80 W. Frequency response: 50 Hz - 20 kHz. Sensitivity (1W/1m): 90 dB. Nominal impedance: 8 Ohm. Woofer size: 8.0 inches. Tweeter size: 0.75 inches. Woofer type: Woven Glass Fiber Cone. Tweeter type: Titanium dome. Tweeter Pivoting/Angled: Yes. Audio input: Binding post. Grill type: Round grill. Woofer quantity: 1 pc. Tweeter quantity: 1 pc. Dimensions: Ø284 x 110 mm. Cutout diameter: Ø258 mm. Mounting depth: >110 mm. Magnetic: Yes. Weight: 2.1 kg. Color: white grill.

Warranty:

24 months.

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8” 2-Way Ceiling Speaker, White

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