HiFi OEM amp v's Alpine HiFi upgrade amp.

Lanscar · 05-15-2011, 07:17 PM

Is there a difference in power output between the OEM HiFi amp and the Alpine upgrade HiFi amp?

Are they the same internally, but externally different looking.

I only have the base stereo so I don't have any amp in my car, but I saw an Alpine HiFi amp at the dealer in a display cabinet an it looks so small.

ctuna · 05-15-2011, 09:24 PM

But I would be guessing its a class AB amp as it was released in 06.
The newer amps are full range class D which means they can be much smaller
due to switching technology in the amp itself.
Much more power is packed in a much smaller package .
Do a search on the two technologies there are some trade offs.

The original HI Fi amp is rated at 25 per channel for the doors and 40 for the floors. (at 2 ohms)
I have read the Alpine is 85 per channel rms at 4 ohms.

A better substitute for the HI FI is the JL XD 600/6 as it has 6 channels but the speakers
should be upgraded to take the new power.

Lanscar · 05-16-2011, 09:29 PM

Quote:

Originally Posted by ctuna

The original HI Fi amp is rated at 25 per channel for the doors and 40 for the floors. (at 2 ohms)
I have read the Alpine is 85 per channel rms at 4 ohms.

That's interesting.
The OEM HiFi amp has staggered power where as the Alpine channels has all the same power.

Does that mean if using the Alpine amp the front components will overpower the underseat subs.

ctuna · 05-16-2011, 10:22 PM

I know they supply upgraded doors for the front and tweeters .
They must compensate for this somehow.
The alpine retrofit was not designed to be part of a HI FI system retrofit as far
as I have read .

Do a search on the Alpine on this board a lot of things will show up.
Also FYI
http://www.e90post.com/forums/showthread.php?t=365866

http://www.e90post.com/forums/showthread.php?t=368847

http://www.e90post.com/forums/attach...2&d=1266451970

Lanscar · 05-16-2011, 11:21 PM

Thanks for the link's.

The bottom link explains a lot. Very helpful.

Thank you.

ctuna · 05-17-2011, 01:03 AM

http://www.e90post.com/forums/attach...1&d=1209780865

Lanscar · 05-17-2011, 01:13 AM

Mine is the base stereo but I will be upgrading, however I have decided I wont be installing the Alpine upgrade.

This is my goal.

Morel Hybrid Ovation II for front and rear
Morel 9" ADMW under seat woofer's
Morel Integra centre and finally Morel Ultimo 12".

TruTechnology amps and an JBL MS8 for processing.

Oh boy and I can't wait.

05-15-2011, 07:17 PM	#1
Lanscar New Member 6 Rep 16 Posts Drives: 325i Join Date: Apr 2011 Location: Sydney iTrader: (0)	HiFi OEM amp v's Alpine HiFi upgrade amp. Is there a difference in power output between the OEM HiFi amp and the Alpine upgrade HiFi amp? Are they the same internally, but externally different looking. I only have the base stereo so I don't have any amp in my car, but I saw an Alpine HiFi amp at the dealer in a display cabinet an it looks so small.
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05-15-2011, 09:24 PM	#2
ctuna Lieutenant General 1920 Rep 13,122 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	I don't know what technology the old amp is But I would be guessing its a class AB amp as it was released in 06. The newer amps are full range class D which means they can be much smaller due to switching technology in the amp itself. Much more power is packed in a much smaller package . Do a search on the two technologies there are some trade offs. The original HI Fi amp is rated at 25 per channel for the doors and 40 for the floors. (at 2 ohms) I have read the Alpine is 85 per channel rms at 4 ohms. A better substitute for the HI FI is the JL XD 600/6 as it has 6 channels but the speakers should be upgraded to take the new power. Last edited by ctuna; 05-15-2011 at 09:30 PM..
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05-16-2011, 10:22 PM	#4
ctuna Lieutenant General 1920 Rep 13,122 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	Alpine system was for the ampless base system I know they supply upgraded doors for the front and tweeters . They must compensate for this somehow. The alpine retrofit was not designed to be part of a HI FI system retrofit as far as I have read . Do a search on the Alpine on this board a lot of things will show up. Also FYI http://www.e90post.com/forums/showthread.php?t=365866 http://www.e90post.com/forums/showthread.php?t=368847 http://www.e90post.com/forums/attach...2&d=1266451970
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05-16-2011, 11:21 PM	#5
Lanscar New Member 6 Rep 16 Posts Drives: 325i Join Date: Apr 2011 Location: Sydney iTrader: (0)	Thanks for the link's. The bottom link explains a lot. Very helpful. Thank you.
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05-17-2011, 01:03 AM	#6
ctuna Lieutenant General 1920 Rep 13,122 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	This is also usefull if you have Hi Fi http://www.e90post.com/forums/attach...1&d=1209780865
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05-17-2011, 01:13 AM	#7
Lanscar New Member 6 Rep 16 Posts Drives: 325i Join Date: Apr 2011 Location: Sydney iTrader: (0)	Mine is the base stereo but I will be upgrading, however I have decided I wont be installing the Alpine upgrade. This is my goal. Morel Hybrid Ovation II for front and rear Morel 9" ADMW under seat woofer's Morel Integra centre and finally Morel Ultimo 12". TruTechnology amps and an JBL MS8 for processing. Oh boy and I can't wait.
	Appreciate 0 Quote