Class D Amplifiers..

D

Dazed

Guest
My (old) Velodyne SPL1000 uses Class D Amplification (whatever the hell that actually means) as do some other subs and a couple of Tannoy Westminsters(?) featured in this months Hi-Fi news.

As far as I can see Class D amplifiers offer huge amounts of power, my Velodyne has something like 750w, and they run very cool.

My question is why aren't these type of amps used in amps/receivers and power amps instead of whatever cl;ass A/B C etc amps are currently employed?
 

buns

Banned
A painless explanation..... class D are exceptionally efficient but noise level is very high beyond about 25% of the switching frequency. Hence you want to use it for low frequencies so it is ideal for subs but not full range reproduction

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buns

Banned
so im told..... though the thought of them in the tannoys is a bit disturbing...... i thought they were big high end speakers...... i didnt realise they were active in any way. is it just the bass secion active or what?

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D

Dazed

Guest
From what I remember the Tannoys were absolutely massive high enders primarily built for the far eastern market. The hombre featured had them modded with Class D amps but to make them active, however not clear whether they were all class D powered - I'll re-read and get back

Found some infor on the Westminsters - not going to win any beauty competitions

http://www.tannoy.com/product.cfm?ID=42&Page=1
 

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