cyrus 7 and 8

honsten · 15th February 2005, 05:38 PM

hey, are these any good? they look too small and cheap to produce a good wallop of sound. how are they compared to makes like krell and so on?

Kees · 15th February 2005, 06:12 PM

I only know the schematics and the sound of the Cyrus 1 MKII.
There is nothing wrong with it.
I think you will be suprised about the quality.

It should be easy to scale the design up to a high current amplifier by using better transistors and put some in parallel as well. The quiescent original Cyrus I was on the low side, but this can be improved easily.
A separate power supply for the voltage amplifier will help too.

My feeling that if you build the Cyrus I, modify the current amplifier and use a massive power supply, it can be High End.

anatech · 15th February 2005, 10:26 PM

I just got a Cyrus 8 vs in for service. After repair it'll go upstairs to meet my PSB Stratus Golds.

These products normally sound good and the vs is supposed to be an enhancement. The amp design is solid but they were not intended to drive silly low impedance loads to high levels. Since this is my first vs series in for service I can't say, but I bet you they sound better still.

-Chris

15th February 2005, 05:38 PM	#1
honsten diyAudio Member Join Date: Feb 2004 Location: london	cyrus 7 and 8 hey, are these any good? they look too small and cheap to produce a good wallop of sound. how are they compared to makes like krell and so on?

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15th February 2005, 06:12 PM	#2
Kees diyAudio Member Join Date: Oct 2002 Location: The Netherlands	I only know the schematics and the sound of the Cyrus 1 MKII. There is nothing wrong with it. I think you will be suprised about the quality. It should be easy to scale the design up to a high current amplifier by using better transistors and put some in parallel as well. The quiescent original Cyrus I was on the low side, but this can be improved easily. A separate power supply for the voltage amplifier will help too. My feeling that if you build the Cyrus I, modify the current amplifier and use a massive power supply, it can be High End.

15th February 2005, 10:26 PM	#3
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	I just got a Cyrus 8 vs in for service. After repair it'll go upstairs to meet my PSB Stratus Golds. These products normally sound good and the vs is supposed to be an enhancement. The amp design is solid but they were not intended to drive silly low impedance loads to high levels. Since this is my first vs series in for service I can't say, but I bet you they sound better still. -Chris