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Specifications & manuals
Legendary service
Delivery, services & returns
Questions & answers
Specifications & manuals
key Specifications
Brand
Sennheiser
Finish Colour
Black
Model Number
HD439
warranty
Manufacturer Warranty
2 Years
audio
Frequency Response Range
17 - 22,500
Headphone Type
Over Ear Headphones
Sensitivity
112
Legendary service
The Appliances Online Net Promoter Score (NPS) is based on feedback from 89,897 people, collected between August 2024 to August 2025. Learn more about the Net Promoter Score (NPS).
Delivery people are excellent
Please let your management team know that my appliance arrived yesterday and that the delivery people made such an excellent effort to contact me and inform me of delivery times. I think this is a great service and that the delivery people are excellent. Marilyn, Mackenzie, QLD
Their driving skills in tight spaces were impressive
I cannot praise Appliances Online enough. I would not even think of buying from anywhere else any more, there is no competition. They have very competitive prices, ordering is ultra-easy and payment is safe, there are real people to speak to if there are any hiccups with ordering and the delivery people, well, I cannot speak highly enough of them. They kept me informed of the expected delivery time and when it changed because their schedule was faster than predicted, they phoned to let me know. The chaps were polite, courteous and their driving skills in tight spaces were impressive. Definitely a positive buying experience, thanks. Elizabeth, Fountaindale, NSW
Installed by your very courteous delivery drivers
Hi Guys, Just a quick note to thank you very much for your fantastic service. I just received my fridge and it was installed by your very courteous delivery drivers. People (especially retailers) are very sceptical about purchasing whitegoods via the internet. Many claimed that web based products are seconds therefore cheaper. I can atest this is not the case. I will be recommending you to all and sundry. Again, thank you for your fantastic service. Themi,
Delivery, services & returns
Appliances Online is all about legendary service. We offer free next business day delivery, free connection, free removal and free recycling, and we even offer Saturday delivery and, in some locations, a Premium Delivery option that allows you to choose your own 2-hour delivery window.
Questions & answers
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