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Cyrus 8 Power input sensitivity
Cyrus 8 Power input sensitivity
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Old 23rd February 2021, 09:42 AM   #1
flambart is offline flambart  Italy
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Join Date: Sep 2009
Default Cyrus 8 Power input sensitivity

Hi,

in these days I'm enjoying my 8 Power Cyrus. Great sound, I love this amp so much

Nevertheless, a small problem. I drive it using one of my vintage preamps: a Meridian 101, a Hafler DH-101 and a Quad 33. With any of those sources, the Cyrus' input sensitivity is quite high, so I'm forced to use only a small portion of the volume potentiometer. Nothing serious, but annoying a bit

I've opened the Cyrus cover, and I've seen several links on the board, some with a jumper installed. I am wondering if any of those is intended to set the input sensitivity

Anyone knows something more?

Thanks a lot for the attention, Paolo
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Old 23rd February 2021, 12:08 PM   #2
duncan2 is offline duncan2  United Kingdom
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Join Date: Mar 2013
Location: Scotland.
Cyrus mention "fixed gain " at a line input of 200mv designed to be used with their own preamp .


The Quad 33 =pre out is 500mv for example otherwise line output is 100mv.

Meridian output is=775mv.
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Old 23rd February 2021, 07:01 PM   #3
flambart is offline flambart  Italy
diyAudio Member
 
Join Date: Sep 2009
Hello Duncan,

thx for your prompt reply.

So, three solutions it seems:

. buy a Cyrus preamp (expensive)
. add a simple attenuator inside the amp, immediately after the input sockets (complex)
. enjoy the amp as it is (philosophical)

I think I'll choose the most relaxing one...

Thank you very much again for your kind support
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