Head Unit Power rating of Head Unit (satnav model)

FWH · 21st July 2007, 10:53

Does anyone know what the power output rating of the head unit is?

4x??W according to what standard?

I know that this only a very rough guide and many other parameters are important, but I am looking at some speaker options, and one alternative that looks good (MDS Dynamic DC650RS) recommends "modern HU with 4x40W power output".

Pottsy · 21st July 2007, 11:04

It will be about 12w RMS.

vtec-hungry · 2nd October 2007, 16:51

Quote:

Originally Posted by Pottsy

It will be about 12w RMS.

omg thats low, you sure about that? so speakers with 50rms will blow the head unit?

dylang652 · 2nd October 2007, 17:14

Quote:

Originally Posted by vtec-hungry

omg thats low, you sure about that? so speakers with 50rms will blow the head unit?

I would have thought that underpowering speakers would not have much chance of blowing the head unit

Overpowering the speakers would blow them but not the other way round (it's actually important to match impedences (the ohms value of the Head Unit c/f the speakers)

Munro · 2nd October 2007, 21:01

Quote:

Originally Posted by vtec-hungry

omg thats low, you sure about that? so speakers with 50rms will blow the head unit?

12 W is low, but it sounds about right with the minimal bass you get.

Pottsy · 2nd October 2007, 22:58

All in-dash radios are about 12w, because that's all you can get from 14V. To get more you need a DC-DC converter, which on upmarket radios is a thing that dangles from a wire and is installed away from the radio.

12w radios are normally marketed as 45w peak. Peak is of course pure hype.

50w speakers will be in trouble with a 100w amp at full power. But distorting any amp (including the 12w one) will produce square corners on the output wave, which are very likely to damage even 50w speakers. Do no distort any amp/speaker setup!

The minimal bass is primarily because the speakers are not in sealed cabinets, so they just are not working very well. Even putting something in the parcel shelf would be an improvement!

21st July 2007, 10:53	#1 (permalink)
FWH Super Moderator Civinfo guru Join Date: 3rd June 2007 Location: Sweden Posts: 4,851 Thanks: 3 Thanked 26 Times in 23 Posts	Power rating of Head Unit (satnav model) Does anyone know what the power output rating of the head unit is? 4x??W according to what standard? I know that this only a very rough guide and many other parameters are important, but I am looking at some speaker options, and one alternative that looks good (MDS Dynamic DC650RS) recommends "modern HU with 4x40W power output".

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This thread is about: Power rating of Head Unit (satnav model), it's in Ipods, MP3 Players and ICE at the Honda Civic forum Civinfo; Does anyone know what the power output rating of the head unit is? 4x??W according to what standard? I know that this only a very ...

21st July 2007, 11:04	#2 (permalink)
Pottsy Administrator Civinfo guru Join Date: 10th April 2006 Location: Leics Posts: 4,775 Thanks: 7 Thanked 64 Times in 33 Posts	It will be about 12w RMS.

2nd October 2007, 22:58	#6 (permalink)
Pottsy Administrator Civinfo guru Join Date: 10th April 2006 Location: Leics Posts: 4,775 Thanks: 7 Thanked 64 Times in 33 Posts	All in-dash radios are about 12w, because that's all you can get from 14V. To get more you need a DC-DC converter, which on upmarket radios is a thing that dangles from a wire and is installed away from the radio. 12w radios are normally marketed as 45w peak. Peak is of course pure hype. 50w speakers will be in trouble with a 100w amp at full power. But distorting any amp (including the 12w one) will produce square corners on the output wave, which are very likely to damage even 50w speakers. Do no distort any amp/speaker setup! The minimal bass is primarily because the speakers are not in sealed cabinets, so they just are not working very well. Even putting something in the parcel shelf would be an improvement!