Taramps TS 400x4 FULL RANGE 2 Ohms 4 Channels 400 Watts RMS Class D Car Audio Amplifier Multichannel LED Indicator CROSSOVER Frequency Response 10Hz to 30KHz High Pass and Low Pass

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Men's 4 × 400 m Relay Final Results" (PDF). olympics.com. 7 August 2021. Archived from the original (PDF) on 7 August 2021 . Retrieved 26 August 2021. Javier Clavelo Robinson (21 August 2022). "Miller-Uibo delights home crowd as nine more records fall at NACAC Championships". World Athletics . Retrieved 31 August 2022. The P142 is a 4” 2-way full-range speaker rated at 30 watts RMS and designed for fanatics who need a quality factory replacement driver. Includes two speakers, integrated high-pass crossovers and mounting hardware. Sold in pairs (2 each).

United States ( Gwen Torrence, Maicel Malone-Wallace, Natasha Kaiser-Brown, Jearl Miles) 3:16.71 (1993) dq3 The Russian team ( Yuliya Gushchina, Tatyana Firova, Kseniya Ryzhova and Antonina Krivoshapka) originally won in the 2013 World Championships, but was disqualified after Krivoshapka was found to have used performance-enhancing drugs. dq1 The United States team ( Jerome Young, Antonio Pettigrew, Chris Jones and Tyree Washington) originally won the 1997 World Championships in a time of 2:56.47 minutes, but was disqualified in 2009 after Pettigrew admitted to doping during the period. Quincy Watts ran a 43.1 split and Steve Lewis (USA) ran a 43.4 split in the 1992 Barcelona Olympic final.

https://www.reuters.com/article/us-olympics-rio-doping-russia/russia-stripped-of-beijing-2008-4x400m-womens-silver-medal-idUSKCN10U242 dq2 The United States team ( Jerome Davis, Antonio Pettigrew, Angelo Taylor and Michael Johnson) originally won the 1999 World Championships, but was disqualified in 2009 after Pettigrew admitted to doping during the period. Women's 4×400m Relay Final Results" (PDF). World Athletics. 27 August 2023 . Retrieved 28 August 2023.

a b c d e f g h "4 x 400m Mixed Relay Final - 2020 Olympics" (PDF). Archived (PDF) from the original on 31 July 2021. x 400 Metres Relay Women − Final − Results" (PDF). IAAF. 6 October 2019 . Retrieved 8 October 2019. The T2652-S is a 6.50” 2-way component system featuring 1” aluminum dome tweeters and is rated at 100 Watts RMS. Kit includes pair or woofers with grilles, two tweeters with dedicated audiophile crossovers and mounting hardware. Sold in pairs (2 each) Metres Relay Records – outdoor". International Association of Athletics Federations . Retrieved 1 September 2011. Women's 4 × 400 m Relay Final Results" (PDF). olympics.com. 7 August 2021. Archived from the original (PDF) on 9 August 2021 . Retrieved 26 August 2021.

Alberto Juantorena (Cuba) ran a 43.7 split in the 1977 IAAF World Cup event as part of the Americas team. The quartet of Justin Robinson, Rosey Effiong, Matthew Boling and Alexis Holmes came home in 3:08.80 ahead of Great Britain, who won silver, and bronze medallists Czechia (Czech Republic). A Russian team of Yuliya Gushchina, Kseniya Ustalova, Marina Karnaushchenko and Aleksandra Fedoriva originally finished third in the 2012 World Indoor Championships, but was disqualified in 2019 after Gushchina was found to have used performance-enhancing drugs. [42]

a b c d "4 × 400 m Relay Mixed − Final − Results" (PDF). IAAF. 29 September 2019 . Retrieved 3 October 2019. Key competition decisions made at 227th World Athletics Council Meeting". World Athletics. 15 March 2022 . Retrieved 9 April 2022. The P1462 is a 4”x6” 2-way full-range speaker rated at 35 watts RMS designed for fanatics needing a quality factory replacement. Includes two speakers with adapter plates, integrated high-pass crossovers and mounting hardware. Sold in pairs (2 each). Main article: 4 × 400 metres relay at the World Championships in Athletics Men [ edit ] Championships a b c d "Mixed 4 x 400 Metres Relay - Round 1 Results Summary" (PDF). World Athletics. 19 August 2023 . Retrieved 19 August 2023.According to the IAAF rules, world records in relays can only be set if all team members have the same nationality. a Original silver medalists, Russia, and 4th place finishers, Belarus, were stripped of their results for doping offenses. Following reallocation, Jamaica were promoted to the silver medal, and Great Britain to the bronze. [37]