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I do find it interesting that the Yamaha manual doesn't say the Z7 has to be vented only that the enclosed space must have the dimensions of (20+30cm) x (44+20cm) x (44+20cm) therefore in that situation the air volume would be approx. (I've just rechecked the manual and it does say that temperature rises of more than 40DegC is normal with an ambient of 25DegC so that would mean that their design Ta would definitely be around 75DegC). However, given the fact that the Z7 is passively cooled and for Yamaha to pass EU rules had to put a plastic heat insulator on the top I'd suspect they are on the upper reaches of the range. They could have used anything from 35-45DegC up to about 60-80DegC. Ta(max) is decided during engineering design and as Yamaha don't publish what values they use all we can assume is the range they've used. I don't know what power amp ICs the Z7 uses so I cannot check exact figures - but checking the specifications for a 140W STAC IC Amp the Tj(max) is 150DegC with a 1:1 conduction figure (i.e. However, the external temperature does directly relate to the internal temperatures (Tj) and depends on heat conduction by the Heatsink (Ts) and the surrounding air (Ta) as per: Tj -(Rjc)- Tc -(Rcs)- Ts -(Rsa)- Ta Not necessarily the temperature experienced outside the case. It is the temperatures at the semi-conductor junctions (Tj) inside the chip that matter. Most semi-conductor devices these days are designed to run warm as cooling is expensive. Shop Harvey Norman’s range of Hi fi systems today and enjoy your radio, songs or movies in all their glory.Click to expand.This is true in theory - I'm not arguing with this - but if you can still touch it - its usually not a problem with consumer electronics. #Clearance for shelf over audio tuner movieMedia players, you can transform your Saturday night movie experience from fine to phenomenal!ĭon’t settle for average when it comes to your entertainment. While you’re upgrading the audio situation in your home, why not check out the options for revamping your visuals too? With a fantastic range of state of the art TVs, For larger spaces, you can choose to place multi room wireless speakers in separate rooms, or choose a more comprehensive hi fi sound system. With compact, wireless speakers in a range of sizes, you can experience incredible sound quality without taking up too much space. If you’re looking to add music to a small room, check out the mini hi fi systems from popular brands like Sonos. Can’t let go of your favourite CDs? Not to worry some hi fi systems from the likes of Sony still feature CD trays to allow you to rock out to all your old classics without searching for them as an MP3. With the option to play audio wirelessly or via a USB connection, you can connect your favourite tunes from your smartphone or other device and experience them in impressive crystal clear sound. ![]() With hi-fi systems from the biggest names in audio including Sonos, Philips, Panasonic, Sony and Yamaha, you can choose from some of the best products in the business.Ĭombining multiple ways of playing your favourite audio, a hi fi system is a convenient way to get the most out of your music. Say goodbye to the tinny sound of old radio or the confines of headphones with a powerful sound system from Harvey Norman. #Clearance for shelf over audio tuner fullSee Full Range Get Savings for your next RugsĮnhance your entertainment system with the fantastic range of hi fi systems from Harvey Norman.įind your sound and turn it up loud with our fantastic range of hi fi systems. Hibernation Haven Shop our latest Quilts & Pillows
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