h/u pre amp voltage vs amp input voltage

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monorail

Member - Posts: 22

Joined: December 12, 2005

Location: United States

Posted: March 25, 2010 at 3:44 AM / IP Logged

I have an older amp with an input voltage rating of 500mv. I'm looking at a newer H/U with a pre-amp of 2V. Is this doable or do I need to upgrade the amp too?

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oldspark

Gold - Posts: 4,913

Joined: November 03, 2008

Location: Australia

Posted: March 25, 2010 at 3:59 AM / IP Logged

So you need to reduce 2V to 0.5V....

What a blessing!

It might be as simple as a 4:1 resistor/voltage divider...

IE - for 10k-Ohm impedance - 2V into 7.5k & 2.5k series connected resistors (with 2.5k on GND side) and the 0.5V out from the 2.5k.

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i am an idiot

Platinum - Posts: 13,667

This member consistently provides reliable information

Joined: September 21, 2006

Location: Louisiana, United States

Posted: March 25, 2010 at 5:56 AM / IP Logged

The amplifier has a gain control knob, simply turn it down a bit.

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monorail

Member - Posts: 22

Joined: December 12, 2005

Location: United States

Posted: March 26, 2010 at 9:49 AM / IP Logged

So it's that simple? There will be no damage to the amp?

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Steven Kephart

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Joined: November 06, 2003

Location: Oregon, United States

Posted: March 26, 2010 at 9:55 AM / IP Logged

It won't damage the amp. Here's a link that explains it in detail: http://www.bcae1.com/preoutv.htm

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i am an idiot

Platinum - Posts: 13,667

Joined: September 21, 2006

Location: Louisiana, United States

Posted: March 26, 2010 at 9:01 PM / IP Logged

It is that simple, and no it will not damage your amplifier.

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monorail

Member - Posts: 22

Joined: December 12, 2005

Location: United States

Posted: March 27, 2010 at 12:12 AM / IP Logged

Thanks much guys!

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h/u pre amp voltage vs amp input voltage

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