"It's all part of the wider concept of giving people a reason to go back to The Warehouse," said Byrne.
"You've had a period of disenfranchised shoppers who were a bit jaded with The Warehouse and what they offered."
Powell said the introduction of Sony to the Red Sheds was further evidence that the refurbishment strategy was working, following the recent addition of other brands including Kambrook and Hoover.
It was also an example of improved access to top brands being aided by the company's acquisition of Noel Leeming Group, the electronics retailer it purchased in December for $65 million, he added.
"Sony is a great brand for The Warehouse as it covers a wide range of high-quality technology products," Powell said.
Byrne said the electronics retail sector in New Zealand had been hit by huge price deflation, meaning consumers who in the past would have purchased The Warehouse's home electronics brands could afford higher-end products.
"People have been happy to go and buy a Sony or a Samsung or an LG," he said. "There hasn't really been a reason to drop down to a Transonic or what-have-you."
Transonic, The Warehouse's former in-house electronics brand, was recently dumped over quality issues and replaced with Veon, manufactured exclusively for the New Zealand retailer in China.
In March the company reported adjusted net profit of $52.9 million for the half-year to the end of January, up 13.2 per cent on the earlier comparable period. Revenue increased 18.3 per cent to $1.1 billion.
Shares closed up 5c at $4.10 last night.