"Dave Plowman (News)" wrote in message
...
In article ,
Trevor Wilson wrote:
BTW: The vast majority of head units deliver around 4 Watts or 16 Watts
continuous (aka: RMS) per channel. Only units which have internal
inverters can deliver more power than this. Usually, this would be an
external power amp. Manufacturer who claim more are usually telling
fibs. The 4 Watt rated units (rare today) use a standard push pull amp.
The 16 Watt units use a bridged output stage.

You could get more power by using an output transformer - Blaupunkt did
this when they were Blue Spot. ;-) Takes up rather a lot of room though.
Or, of course, use lower than 4 ohm speakers.

**Indeed. Which is why I wrote: "....vast majority of HEAD UNITS..."
(emphasis added). I used to own a transformer coupled power amp (for my car)
which was rated at 150 Watts RMS (sic). It delivered a fairly credible 60
Watts continuous, however. Of course, it sounded like crap.


There's a DIN standard for fiddled power output. 45324. Allows you to
claim 26 watts when it's actually 18 at 1% distortion.

**Like I said: 16 Watts continuous is about it.

Trevor Wilson