'90s G-SHOCK Throwbacks: Essential Watches for Collectors

Since 1995 the G-SHOCK 6900 has been dotting wrists around the world. Initially popular with the military and outdoor enthusiasts the model quickly made inroads in the skateboarding and sporting communities, eventually reaching critical mass as a global streetwear icon. Today, the watch exists in an extensive array of options and rainbow of colors, from special super-tough alloy models , to heritage watches , and even a J Balvin collab.

Fittingly, Casio has decided to commemorate the G-SHOCK 6900’s thirty-year legacy with three limited-edition models— the 30th anniversary collection —colored red, yellow, and black, the trio of initial hues.

The latest models continue to feature the iconic 53mm round casing, along with the characteristic layered circle design and prominent front button. This button is crafted from polished metal and bears an intricately etched "G" logo, enhancing both the robust aesthetic and adding a subtle tactile variation. When you press this button, the inscription “SINCE 1995” displays under the LCD Super Illuminator backlight. Additionally, the back cover is inscribed with “SHOCK RESIST,” embellished further with 30 stars marking the milestone year.

Similar to other models in the 6900 series, these special 30th anniversary edition G-SHOCK watches come with the brand's signature shock-resistant design, providing up to 200 meters of waterproofing. They feature both 12- and 24-hour display options, along with a stopwatch capable of measuring hundredths of a second, as well as a countdown timer function. Additional features include multiple alarms, an illuminating flash alert system, and an advanced full-auto calendar valid through the year 2099. These timepieces operate using a reliable quartz digital mechanism known for being precise within ±15 seconds each month and can run efficiently off a single CR2016 battery for about half a decade.

To reduce their ecological footprint, the watch cases and straps are made from bio-based resin, derived from sustainable natural sources.

The DW6900 30th Anniversary Series will be priced at $120 when available at certain stores, gshock.com , along with the G-SHOCK Soho store.

$120 at casio

Related: Top Watches Under $500 for 2025 That Every Man Will Be Proud to Wear

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Amps, Volts, Watts, Ohms: Unraveling the Key Differences

The fundamental elements of electricity are quite simple and logical to comprehend. electrical terms relate and get along with each other like a harmonious family. Before you tackle any electrical or home wiring Project, get acquainted with the following terms so you can approach them more intelligently, safely, and without hesitation.

What Is a Watt?

Watts measure electrical power. Consider wattage as the force behind electricity used for tasks like warming up or lighting a space in your house. For instance, think about the watts needed for a portable electric space heater Rated at 500 watts, this space heater uses 500 watts of electricity whenever it is activated.

You'll also come across wattage when choosing. light bulbs To locate an incandescent bulb that generates similar illumination to the burnt-out one, you should examine the wattage. Additionally, the wattage rating of an appliance is typically indicated on its nameplate.

What Is a Volt?

Voltage acts as the force that drives electric current through a wire.

In North America, utility systems generally supply electricity to your home’s service panel at voltages of 240 and 120. Large electric devices such as ranges , clothes dryers, water heaters , air conditioning and space heating systems Typically run on 240 volts. All other devices function with 120 volts.

What Is an Amp?

Amperage indicates how quickly electricity moves through an electric circuit. To liken it to plumbing: if voltage represents water pressure, then amperage signifies the speed at which the water travels. "Amps" serves as the abbreviated term for this measurement.

During installation, modification, or replacement of branch circuits in your house, within your electrical panel, you'll encounter either fuses or circuit breakers Of varying dimensions. Standard general-purpose lighting and electrical outlet circuits have a rating of 15 amps. In more recent building practices, you will additionally encounter specialized 20-amp circuits designed specifically for areas like kitchens, bathrooms, and laundry rooms. garage receptacle outlets along with appliances such as a dishwasher or refrigerator.

Electric clothes dryers and electric water heaters usually have a rating of 30 amps. Air-conditioning units Electric ranges along with electric countertops or wall-mounted electric ovens can have ratings of 30, 40, or 50 amps.

Every electrical component in your house should be synchronized to ensure safe operation. The amperage rating of your fuse or circuit breaker determines the wire gauge and limits the circuit’s capabilities. Should you require additional amps, larger wiring will be necessary.

What Is an Ohm?

An ohm (denoted by the Greek symbol Omega, or Ω) gauges the natural resistance present in various materials. electrical wire Copper wire, which is highly efficient at conducting electricity, is commonly present in numerous households. On the other hand, aluminum wire, also a proficient conductor, is typically utilized in commercial, industrial, and power supply setups. Each type has natural opposition to electric current flow.

Wires constructed with various metals exhibit differing levels of electrical resistance, similar to how a miniature garden hose restricts water flow when contrasted with a substantial fire hose.

While troubleshooting electrical circuits, appliances, light switches, fuses, relays, and other components using a multimeter, certain settings and readings will be indicated in ohms. When testing the continuity of a new fuse, the multimeter will read roughly zero Ohms of resistance. This indicates that the fuse has continuity and is in working condition.

If you examine a potentially faulty fuse or malfunctioning light switch, you'll likely receive an Ohm reading different from zero. This could signify a blown fuse or a problematic light switch. Refer to the multimeter’s instruction manual for guidance on how to proceed. operate it safely and interpret the readings.

What Is the Relationship Between Watts, Volts, Amps, and Ohms?

Electrical mathematics is simple. Once you have knowledge of two variables, you can determine the outcome. Knowing "x" and "y," allows you to calculate "z."

Numerous laws govern physics, science, and nature, with Ohm’s Law being crucial for grasping fundamental concepts of electricity. The Ohm’s Law Wheel serves as an invaluable tool to clarify these principles.

Sure! Here’s how this might look as an example of a real-world scenario: Imagine you're setting up an electric space heater in your garage. The local hardware store has a 5,000-watt (also five kilowatts or 5kW) unit available which would be ideal for the area. What capacity breaker do you require for this space heater?

Based on the label, the space heater has a rating of 5 kW and requires a voltage supply of 240 volts. You need to determine the amperage (denoted as 'I' for "current intensity"). Referring to the Ohm’s Law chart, use this equation:

I = W/V (amperes = watts divided by volts);

I = 5,000 watts ÷ 240 volts;

I = 20.8 amps;

Since an electric space heater operating continuously might run for at least three hours during chilly weather, a safety margin of 125% is used. Thus, 20.8 amps multiplied by 1.25 equals 26 amps.

Everything is completed! A typical 30-amp branch circuit will provide sufficient power to reliably and safely meet the energy needs of the space heater without interruption.

How to Operate Securely Within Your House's Electrical Setup

• Electricity is an unseen force that we often overlook. Handling electricity doesn’t have to be risky or complicated provided you understand its principles, approach it cautiously, and follow simple safety measures. Discover how to do so effectively. safely use electrical tools and testers.
• Make sure your electrical tester or multimeter is working properly before turning off the power.
• Always disconnect the power from circuits prior to working on them. Place a label, sign, or circuit breaker lockout device At the electrical panel to prevent anyone from accidentally turning the power back on. You can find various universal circuit breaker lockout devices at home improvement stores and online for under $10.
• Make sure to always use protective eyewear and nonconductive gloves made from materials like leather, rubber, latex, or nitrile. Opt for attire crafted from natural fibers rather than synthetic ones.
• Wear appropriate durable shoes and avoid standing or kneeling on wet or moist surfaces while handling electricity. Utilize a dry, nonconducting wooden object instead. nonconductive mat, especially when working outdoors.
• Utilize tools featuring handles made of rubber or plastic. These nonconductive handle materials offer an additional layer of safeguard against electrical risks.

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高音質蓝牙音箱推荐：13款热门品牌B&O、Marshall、JBL家庭与便携式音箱精选

想隨時隨地跟親朋好友聽歌開派對？晚上夜闌人靜之時想播音樂放鬆心情？相信藍牙喇叭絕對能提升你的音樂體驗。近年不少知名品牌均躋身藍牙喇叭市場，部分經典牌子如B&O、Marshall、JBL等亦按用家需求，推出多款功能各異的款式。編輯將向大家推薦13款熱門品牌高音質藍牙喇叭，包括家用及便攜款，讓大家於不同場合亦能享受音樂盛宴。

1. 家用高音質藍牙喇叭推薦：Marshall Emberton III藍牙喇叭

Marshall Emberton III系列近日推出全新限定配色草灰綠，與反主流文化的嬉皮運動互相呼應。喇叭音色經典響亮，搭載品牌獨有的多音場立體聲技術，單次充電即可提供長達約32小時的持久續航，實現全天候持續播放。Emberton III將支援藍牙低功耗音訊，這項面向未來的技術將藉助AuracastTM功能，開啟音訊分享新體驗。

重量：0.67kg

充電時間：單次充電可長達32小時

藍牙版本：LE AUDIO

售價：$1,499

2. 家用高音質藍牙喇叭推薦：JBL Boombox 2

被喻為品牌最強勁的藍牙喇叭，JBL Boombox 2採用復古風格黑色設計，標榜為可攜式藍牙喇叭。唯其體積較大及較重，雖有手柄設計，但仍較適合放於固定位置使用。Boombox 2防水規格為IPX7，即使浸入一米水深30分鐘內，亦不影響使用。

喇叭最長連續播放時間為24小時，極度耐用，長時間播放亦完全不是問題。除了低耗電外，喇叭更可當作行動電源，為其他電子設備充電。喇叭即使在戶外播放重低音音樂時，表現仍不俗，且大聲播放時，音樂亦不會出現失真的情況，於多人派對上使用就再適合不過。

質量：5.9公斤（長48.5厘米 x 寬20.1厘米 x 高25.7厘米）

連續播放時間：最長24小時

充電時間：6.5小時

藍牙版本：5.1

防水防塵規格：IPX7

售價：$3,499

3. 家用高音質藍牙喇叭推薦：Fender Monterey Tweed藍牙喇叭

知名結他品牌Fender近年涉獵藍牙喇叭市場，將製作結他amp的技術融入於藍牙喇叭中。 Fender Monterey Tweed沿用了复古音箱的设计风格，并配上了经典的浅棕网眼和咖啡色皮革手柄，外观与品牌的标志性吉他放大器Fender Tweed极为相似。如果你是Fender的粉丝，这款产品绝对值得拥有。

Monterey Tweed低音音質雄厚，人聲清脆，播放搖滾樂時表現尤其出色，讓大家安在家中就能享受音樂盛宴。除了藍牙外，機身亦可連接CD機及黑膠唱片機，最遠十米內亦可接收，足夠滿足一般家用需求。惟喇叭不設充電池，且體積較大，因此不能攜帶外出。

質量：6.8公斤（宽34.3厘米 x 高24.76厘米 x 深13.2厘米）

充電時間：不設充電池

防水防塵規格：不防塵防水

售價：$3,680

4. 推薦家用高音質藍牙揚聲器：Bang & Olufsen Beolab 8

近年人們越趨追求高品質的家用喇叭，務求在家享受宛如戲院的聲效。Bang & Olufsen最新Beolab 8揚聲器延續品牌的鋁材工藝，面罩採用丹麥製造的木材或織物材料，外型輕盈典雅。揚聲器由品牌專業調音師手工調音，並採用三驅動器設置，同時集合音束寬度控制技術、主動空間補償技術、自適應調音技術。

Beolab 8下年亦將加入新功能，透過超寬頻技術及品牌專屬app，用家可根據手機指引定點重置最佳聆聽位置，隨時獲得最佳沉浸式聆聽體驗。

5. 推薦家用高音質藍牙揚聲器：Bang & Olufsen Beosound Emerge

聖誕在家中觀賞節日電影，怎少得一部高音質家用喇叭提升觀影體驗？Bang & Olufsen的家用揚聲器Beosound Emerge纖細的外型令揚聲器可融入任何空間環境，同時提供全音頻、超廣闊的聲音表現，讓聲樂環繞房間每個角落。

揚聲器以珍珠噴砂技術製成的碳黑色表面，加上側面板的垂直波紋圖案，突顯品牌工藝。Beosound Emerge已預先配置充足的處理效能及連接技術，為將來升級成最新技術版本做好準備。

重量：1.3公斤（宽6.7厘米 x 高25.5厘米 x 深16.5厘米）

充電時間：不設充電池

藍牙版本：5.0

售價：$5,598（3年保養期）

6. 便攜高音質藍牙喇叭推薦：Marshall Middleton播放器

Marshall Middleton播放器之間能夠通過Stack模式實現多台互連，營造超乎想像的寬廣聲場，瞬間增添氣氛。 加上長達約20小時的播放時間，20分鐘即可獲得約小時播放時間，讓派對及聚會期間都能享受無間斷的音樂。

Middleton播放器亦配置了兩個3/5英寸的高音單元、兩個3英寸的低音單元和兩個無源輻射器，確保能呈現狂野響亮的出色音質。播放器同時採用IP67級防塵與防水設計，加上配備方便可拆式手提帶和貼心的充電功能，能為其他電子設備充電，非常適合當旅途良伴。加上100％不含PVC及約55％塑料成份使用再生塑料，聽歌同時也能為環保出一分力。

重量：1.8公斤（尺寸：闊23厘米 x 高10.9厘米 x 深9.5厘米）

連續播放時間：20+小時

充電時間：充電20分鐘使用2小時

藍牙版本：5.1

防水防塵規格：IP67

售價：$2,799

7. 便攜高音質藍牙喇叭推薦：Devialet Mania便攜式智能揚聲器

聲學工程公司Devialet，最近推出首款便攜式智能揚聲器Devialet Mania。機身採用圓形拋光設計及梭織面料，延續品牌Phantom系列精神之餘，亦更顯高雅奢華。僅高17cm的揚聲器配備光滑手柄，更便於攜帶。

作為目前便攜式揚聲器市場上，唯一同時提供立體聲及實時聲波成像的產品，揚聲器配備四個全頻單元，以及兩個由揚聲器有源匹配技術驅動的重低音，提供強大的立體聲。Mania更可連接音樂串流平台Spotify及Airplay 2，用家可隨時聆聽更多元的音樂。

重量：2.3kg

連續播放時間：10小時中等音量電量

藍牙版本：5.0

防水防塵規格：IPX4

售價：$6,990起

8. 便攜高音質藍牙喇叭推薦：Sonos Move 2

Sonos的便攜喇叭Move 1一直都是品牌最具人氣的音響。近日品牌推出功能再升級的Move 2。喇叭採用全新聲學架構，不論於室內或戶外都能感受寬敞的立體聲及清晰的人聲。加上長達24小時的電池續航力，比原版高兩倍，配備USB-C接口，更可為手機或電子設備充電，是周末自駕遊及派對的好伙伴。

進行戶外活動少不免上山下海，Move 2具備超強耐用性及IP56防護等級，不論意外摔落、水濺、雨淋、灰塵及陽光都沒問題。喇叭採用了與最近推出的 Era 產品相同的新型直觀用戶界面，包括輕觸式式音量滑桿，簡單易用；加上獨特的橄欖色款式，與室內和室外的中性美學相得益彰。

質量：3kg （宽6.29厘米 x 高24.2厘米 x 深12.6厘米）

充電時間：一次可用24小時

藍牙版本：5.0

售價：$4,499

9. 便攜高音質藍牙喇叭推薦：Bose便攜式智能揚聲器

作為全世界最大的音響廠家，相信大家對Bose這個名字都不會感到陌生。品牌的便攜式智能揚聲器主打將便攜式及無線家用揚聲器融合，且支援Wi-fi及藍牙。相較其他便攜藍牙喇叭，此款不算特別輕巧，惟其手提扣環設計令喇叭更易攜。機身設計簡約，機頂設基本按鈕，如開關、連接藍牙等，且設燈光圈，以顯示使用狀態。

一如Bose其他音響設備，揚聲器低音效果尤其出色。機身360度全方位音效的設計，令音效更立體。喇叭另設BOSE Music App，用家可按喜好調節高低音設定、使用語音提示功能等。惟以不同程式播放音樂時，表現亦會有所不同，且喇叭較適合於室內使用，空曠環境或令音質立體度降低。但整體而言表現仍不俗。

質量：1.06公斤（高度19.15厘米 × 寬度11.9厘米 × 深度10.4厘米）

連續播放時間：正常音量下12小時，待機模式24小時

充電時間：以原裝充電線約4小時

藍牙版本：4.2

連接範圍：9米內

防水防塵規格：IPX4

售價：$2,999

延伸閱讀：必入手時裝品牌智能產品｜5款Louis Vuitton、Hermès及Berluti智能腕錶、充電器、耳機及藍牙揚聲器推介

10. 推薦便攜式高品質藍牙揚聲器： Ultimate Ears Megaboom 3

標榜戶外使用的Ultimate Ears Megaboom 3，防水防塵級別達IP67，即完全防塵，且放入水中30分鐘內仍可正常使用，甚至可於水中飄浮。喇叭同時通過25項耐久性測試，包括翻滾及防跌等，仍絲毫無損。雖不能長時間浸於水中，但用於各種戶外活動或帶到海灘仍是不二之選。

喇叭機身採用圓柱狀設計，音效可360度全分位播放，配備強勁的沉浸式聲音，且最遠移動範圍可達45米，進行戶外活動時亦不需擔心因距離太遠而中斷連線。配備專屬程式UE Boom使用時，亦可隨意調較音量或根據個人喜好設定EQ模式。儘管高音處理相對較弱，但中低音效果優秀，作為戶外使用的喇叭是不錯的選擇。

重量：0.925公斤（長8.7厘米 x 寬22.5厘米 x 高8.7厘米）

連續播放時間：最長達20小時

防水防塵規格：IP67

售價：$1,099

11. 推薦一款高效能的便攜式藍牙揚聲器：B&O BEOSOUND A1 第二代，具備防水平特點。

Bang & Olufsen 因其優質音響而享負盛名，最近推出了多款便攜式的Bluetooth揚聲器。Beosound A1 的第二代版本體積玲巧，非常容易隨身攜帶。早前有些用戶反映 B&O 的可携式 Bluetooth 揚聲器電池壽命偏短，看來公司已傾聽了客戶的反饋。這款新喇叭的音樂播放時間增加到了18個小時，而且具備達到 IP67 級別的防護功能，能夠抵禦灰塵和水浸，在戶外活動中使用特別合適。

Beosound A1具Voice Assistant功能，且可進行免提通話。喇叭內設三個麥克風，令通話清晰。音質方面，喇叭保持B&O一貫水準，弧形頂部將聲音分散同時，高低音表現仍出色。若你在找尋能進行通話，同時擁有高音質的藍牙喇叭，不妨考慮這款。

重量：558克（宽13.3厘米 x 高4.6厘米 x 深13.3厘米）

連續播放時間：正常音量最長18小時

充電時間：2.75小時

藍牙版本：5.1

防水防塵規格：IP67

售價：$2,398

10. 便攜高音質藍牙喇叭推薦：Marshall Emberton防水藍牙喇叭

同樣為Marshall藍牙喇叭，Marshall Emberton為系列中最小的型號，重量僅0.7kg，一改以往大家對Marshall喇叭笨重的印象。喇叭沿用品牌經典的仿結他音箱設計，小巧可愛。此外，Emberton不但防水，續航力最長亦達20小時，不論於家中使用，或帶去進行野餐等戶外活動亦是不錯的選擇。

雖然外表精巧，但Emberton音質絕不比品牌其他型號遜色。喇叭搭載Blumlein立體聲架構，不論室內或室外都可以隨時享受高品質音樂。即使調至最大音量，音質仍能保持清晰，不會出現失真的情況。若你在考慮加入Marshall家族，Emberton會是不錯的入門款。

質量：0.7公斤（宽16厘米 x 高6.8厘米 x 深7.6厘米）

連續播放時間：最長20小時

充電時間：20分鐘可提供5小時播放電力

藍牙版本：5.0

防水防塵規格：IPX7

售價：$1,299

12. 推薦便攜高解析度藍牙音箱：Sony XB33 Extra BASS™ 可携式无线扬声器

若你在找尋一部用於小型派對的便攜式藍牙喇叭，Sony XB33 Extra BASS™將會是個好選擇。此喇叭防水防塵等級達IP67級，不但完全防塵，即使短暫泡浸於淺水中亦沒問題，帶到戶外甚至海灘亦十分適合。

喇叭採用了EXTRA BASS™音效及LIVE SOUND兩個模式，配合X-Balanced Speaker Unit，可隨時呈現清晰而強勁的音效。除了派對等級的音效外，Sony XB33同時配備強勁的燈光效果，燈光會隨音樂節拍閃爍。只要下載Fiestable app，就能夠控制喇叭上的燈光效果，十分適合帶動氣氛。

重量：1.1kg （寬24.6cm x 高9.7cm x 深10.6cm）

連續播放時間：一般模式最長24小時，EXTRA BASS™模式最長14小時

藍牙版本：5.0

防水防塵規格：IP67

售價：$1,249

13. 便攜高音質藍牙喇叭推薦：JBL 便攜式防水無線藍牙喇叭 Flip 6

一如JBL的音響設備，Charge 5處理中低頻音質的細緻度極佳，音質亦相當「硬淨」。喇叭PartyBoost功能，假如連接更多PartyBoost兼容的JBL喇叭，亦可為環境帶來立體聲效。配合JBL Portable應用程式，更可遙距控制音響聲量、調整音效。

Flip 6共有8種顏色，除了一般的黑、白色外，還有粉紅、湖水綠等更繽紛奪目的顏色。帶著喇叭去海邊或參加派對難免會沾到水，Flip 6除了具備IP67防水防塵規格外，亦有USB充電保護。當連接器偵測到水、鹽或其他化學物質時，會發出提示音響。

重量：0.55kg（寬17.8cm x 高6.8cm x 深7.2cm）

連續播放時間：最長可達12小時

藍牙版本：5.1

防水防塵規格：IP67

售價：$899

延伸閱讀：人氣藍牙無線耳機推薦｜必買15款Bose、Marshall及Klipsch高音質、降噪真無線頭戴式、入耳式耳筒

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