Input sensitivity on amp?

suspencefull · 1st September 2006, 08:31 PM

I am trying to figure out what to do for my setup. I want to just use the volume control on my PC and not use a pre--amp. Just have my DAC output the signal directly into the amp. I don't now what Inmput sensitivity means. It is 1V. Input impedance is 33.2K Ohms. Thanks for any help.

anatech · 1st September 2006, 09:18 PM

Hi suspencefull,
That's a low input impedance for an amp. You may be further ahead to plug the sound card straight in and use the volume control in the PC.

-Chris

suspencefull · 2nd September 2006, 12:56 AM

I was going to use digital out into a DAC and then output into amp. Wouldn't this be the same thing? It is a B&K amp. Thanks for any help.

Here is link :

http://www.bkcomp.com/pdf/8445%20bkR...tsht.1.0.2.pdf

anatech · 2nd September 2006, 01:26 AM

Hi suspencefull,
I am at a loss trying to figure out what you want to end up with. The mixer, or volume utility in your computer should be able to adjust the volume just fine. I am not a fan of "passive preamps", and your impedances are a little low for that.

So what am i missing?

-Chris

suspencefull · 2nd September 2006, 01:32 AM

I wanted to output digital(Coaxial)->DAC->Amp. I wanted to control the volume some way either with a Passive unit connected to the output of the DAC. Or control it from the volume control within the computer. Computer would be nicer because I wouldn't need anything. I didn't know if that was ideal or what.

anatech · 2nd September 2006, 01:40 AM

With the lowish input impedance of your amp, just connect the two together and use the volume in the computer. IT's easy and will work better.

Don't go nuts on an amplifier. Most sound cards aren't that good.

-Chris

suspencefull · 2nd September 2006, 01:42 AM

Won't it sound a lot better with a dac?

anatech · 2nd September 2006, 01:47 AM

Hi suspencefull,
What do you plan to play? MP3's are not good. Reduced data rate wave files are not good. None of that stuff deserves a good dac.

Use a real CD player for good music. It is well worth the money to buy a good one. They are better in every way if you want quality.

-Chris

Tim__x · 2nd September 2006, 02:20 AM

I, and many others, respectfully disagree. I'd much rather listen to a well organized computer music collection, all copied error free (something that can't be said for standalone CD players) with EAC or dBpoweramp, encoded losslessly into .FLAC.

It can be made superior both technically and in terms of convenience.

suspencefull · 2nd September 2006, 02:30 AM

I have all my music in .flac format. That is why I wanted it through a DAC.

1st September 2006, 08:31 PM	#1
suspencefull diyAudio Member Join Date: Aug 2006	Input sensitivity on amp? I am trying to figure out what to do for my setup. I want to just use the volume control on my PC and not use a pre--amp. Just have my DAC output the signal directly into the amp. I don't now what Inmput sensitivity means. It is 1V. Input impedance is 33.2K Ohms. Thanks for any help.

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1st September 2006, 09:18 PM	#2
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi suspencefull, That's a low input impedance for an amp. You may be further ahead to plug the sound card straight in and use the volume control in the PC. -Chris

2nd September 2006, 12:56 AM	#3
suspencefull diyAudio Member Join Date: Aug 2006	I was going to use digital out into a DAC and then output into amp. Wouldn't this be the same thing? It is a B&K amp. Thanks for any help. Here is link : http://www.bkcomp.com/pdf/8445%20bkR...tsht.1.0.2.pdf

2nd September 2006, 01:26 AM	#4
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi suspencefull, I am at a loss trying to figure out what you want to end up with. The mixer, or volume utility in your computer should be able to adjust the volume just fine. I am not a fan of "passive preamps", and your impedances are a little low for that. So what am i missing? -Chris

2nd September 2006, 01:32 AM	#5
suspencefull diyAudio Member Join Date: Aug 2006	I wanted to output digital(Coaxial)->DAC->Amp. I wanted to control the volume some way either with a Passive unit connected to the output of the DAC. Or control it from the volume control within the computer. Computer would be nicer because I wouldn't need anything. I didn't know if that was ideal or what.

2nd September 2006, 01:40 AM	#6
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	With the lowish input impedance of your amp, just connect the two together and use the volume in the computer. IT's easy and will work better. Don't go nuts on an amplifier. Most sound cards aren't that good. -Chris

2nd September 2006, 01:42 AM	#7
suspencefull diyAudio Member Join Date: Aug 2006	Won't it sound a lot better with a dac?

2nd September 2006, 01:47 AM	#8
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi suspencefull, What do you plan to play? MP3's are not good. Reduced data rate wave files are not good. None of that stuff deserves a good dac. Use a real CD player for good music. It is well worth the money to buy a good one. They are better in every way if you want quality. -Chris

2nd September 2006, 02:20 AM	#9
Tim__x diyAudio Member Join Date: Jun 2004 Location: Edmonton area, Alberta	I, and many others, respectfully disagree. I'd much rather listen to a well organized computer music collection, all copied error free (something that can't be said for standalone CD players) with EAC or dBpoweramp, encoded losslessly into .FLAC. It can be made superior both technically and in terms of convenience.

2nd September 2006, 02:30 AM	#10
suspencefull diyAudio Member Join Date: Aug 2006	I have all my music in .flac format. That is why I wanted it through a DAC.

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