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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Quincy Watts ran a 43.1 split and Steve Lewis (USA) ran a 43.4 split in the 1992 Barcelona Olympic final. A Russian team ran 3:18.82 in Beijing in 2008 but the performance was annulled due to the use of performance-enhancing drugs by Tatyana Firova m men relay at the European Championships in Barcelona 2010 (Martyn Rooney (GBR), Thomas Schneider (GER), Kacper Kozłowski (POL), Jonathan Borlée (BEL), Vladimir Krasnov (RUS), Teddy Venel (FRA)) x 400 Metres Relay Women − Final − Results" (PDF). IAAF. 6 October 2019 . Retrieved 8 October 2019. Norman and Benjamin the latest stars to shine in the IAAF Diamond League". IAAF. 1 July 2018 . Retrieved 15 January 2019.

Butch Reynolds ran a 43.23 split and Michael Johnson (both USA) ran a 42.91 split in the 1993 Stuttgart World Championship final; the USA team's final time of 2:54.29 is the current world record. A USA team ran 2:54.20 in Uniondale in 1998 but the performance was annulled due to the use of performance-enhancing drugs by Antonio Pettigrew IAAF deletes Americans' 4 × 400 m world record from the books". The Star. Malaysia. 13 August 2008. Archived from the original on 19 October 2012 . Retrieved 1 September 2011.

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a b c d "4 × 400 m Relay Mixed − Final − Results" (PDF). IAAF. 29 September 2019 . Retrieved 3 October 2019.

A USA team ran 2:56.60 in Philadelphia in 2000 but the performance was annulled due to the use of performance-enhancing drugs by Antonio Pettigrew x 400m Mixed Relay Heat 1 - 2020 Olympics" (PDF). Archived (PDF) from the original on 30 July 2021. 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. Note: The above world record was bettered by three teams at the 2018 NCAA Division I Championship on 10 March 2018 in College Station, United States:a b c d e f "Results - 4 x 400 Metres Relay Mixed - Final" (PDF). World Athletics. 19 August 2023 . Retrieved 19 August 2023. Alfred, Garland and Wilson threaten world records at NCAA Indoor Championships". World Athletics. 12 March 2023 . Retrieved 23 March 2023. All-time men's best 4 × 400m Relay". alltime-athletics.com. 13 August 2017 . Retrieved 13 August 2017. Marita Koch ( GDR) ran a 47.70 split in Erfurt 1984, a 47.9 split in the 1982 European Championship final, and a 47.9 split at the 1985 Canberra World Cup.

Jarmila Kratochvílová ( CZE) ran a 47.6 split in the 1982 Athens European Championship final, a 47.75 split in the 1983 Helsinki World Championship final, and a 47.9 split in the 1983 Europa Cup in London. dq1 The Russian team ( Anastasiya Kapachinskaya, Tatyana Firova, Lyudmila Litvinova and Antonina Krivoshapka) originally finished third in the 2009 World Championships, but was disqualified after Kapachinskaya was found to have used performance-enhancing drugs. A USA team ran 2:56.47 in Athens in 1997 but the performance was annulled due to the use of performance-enhancing drugs by Antonio Pettigrew According to the IAAF rules, world records in relays can only be set if all team members have the same nationality.https://www.reuters.com/article/us-olympics-rio-doping-russia/russia-stripped-of-beijing-2008-4x400m-womens-silver-medal-idUSKCN10U242 United States ( Gwen Torrence, Maicel Malone-Wallace, Natasha Kaiser-Brown, Jearl Miles) 3:16.71 (1993) by the Florida team of Kunle Fasasi, Grant Holloway, Chantz Sawyers, and Benjamin Lobo Vedel. This time was not record-eligible because Fasasi represents Nigeria, Holloway represents the United States, Sawyers represents Jamaica, and Vedel represents Denmark. dq5 The Russian team ( Maksim Dyldin, Lev Mosin, Sergey Petukhov and Vladimir Krasnov) originally finished third in the 2013 World Championships, but was disqualified after Dyldin was found to have used performance-enhancing drugs. 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 Svetlana Pospelova, Natalya Nazarova, Kseniya Vdovina and Tatyana Firova originally finished second in the 2010 World Indoor Championships, but was disqualified after Firova was found to have used performance-enhancing drugs. [41] a b c d "Mixed 4 x 400 Metres Relay - Round 1 Results Summary" (PDF). World Athletics. 19 August 2023 . Retrieved 19 August 2023. It left the USA's Holmes free to cross the line first and claim not only a gold medal but a new world record. b Original silver medalists, Russia, were stripped of their medal for doping offenses. Following reallocation, Jamaica will be promoted to the silver medal, and Ukraine to the bronze. [38] 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.

Alberto Juantorena (Cuba) ran a 43.7 split in the 1977 IAAF World Cup event as part of the Americas team. a b c d e "Mixed 4 × 400 m Relay Final Results" (PDF). World Athletics. 15 July 2022 . Retrieved 17 July 2022. See also: Men's 4 × 400 metres relay world record progression, Women's 4 × 400 metres relay world record progression, and Mixed 4 x 400 metres relay world record progression Men's Outdoor World Record [2]