My_Ref Fremen Edition RC - Build thread - Page 84 - diyAudio
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Old 6th December 2012, 02:52 PM   #831
udailey is offline udailey  United States
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It looks like it has pre outs. Are these pre outs "Audessey'ed"? If you can hook them up to the MyRef and then run the Audessey program I would say then you can do a true comparison.
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Old 6th December 2012, 03:00 PM   #832
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Quote:
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It looks like it has pre outs. Are these pre outs "Audessey'ed"?
It should be...

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Originally Posted by udailey View Post
If you can hook them up to the MyRef and then run the Audessey program I would say then you can do a true comparison.
I do agree
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Old 6th December 2012, 03:07 PM   #833
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It looks like it has pre outs. Are these pre outs "Audessey'ed"? If you can hook them up to the MyRef and then run the Audessey program I would say then you can do a true comparison.
To do that I need to remove the volume pot from MyRef? Is that enough straight straight away send the input to the board? Or do I need to change any component values to make it as a power amp?

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Old 6th December 2012, 03:16 PM   #834
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To do that I need to remove the volume pot from MyRef? Is that enough straight straight away send the input to the board? Or do I need to change any component values to make it as a power amp?
The only change you have to do is to remove the pot, straight connection from pre.outs to FE's inputs
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Old 6th December 2012, 03:19 PM   #835
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The only change you have to do is to remove the pot, straight connection from pre.outs to FE's inputs
Okay. I will do it and update. Can this help to identify the clipping issue?
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Old 6th December 2012, 03:45 PM   #836
udailey is offline udailey  United States
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Andrew probably gave you the answer to the clipping issue. Your source output is likely to high or you could drop the gain of the MyRef down. Probably easier than a new source Of course you could also divide the voltage out of the source or change the gain of the source itself but easier to focus on MyRef and just change the feedback resistor value.
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Old 6th December 2012, 06:45 PM   #837
AndrewT is offline AndrewT  Scotland
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I cannot agree that changing the MyRef gain is a good solution.

That change will almost certainly require a redesign of the compensations.

I can recommend a change in the attenuation immediately before the MyRef.
Leaving the added attenuation this late in the chain minimises the amount of noise added by the attenuation.
Try a 20dB (divide by 10) first and see if that gets you into the ballpark.
I'd suggest a 10k resistor and a 1k resistor wired in series as the load for the 10k volume pot.
The MyRef input pin gets connected to the junction of the 10k & the 1k.
The bottom of the vol pot and the bottom of the 1k and the MyRef Signal Ground all get connected together.

You could add the extra attenuation before the vol pot, but this would require the added attenuator and the vol pot to be located at the MyRef on very short leads.
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Old 7th December 2012, 11:14 AM   #838
romvise is offline romvise  Italy
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Do you have any pic of the interior or of the build process?
Yes, see the attachments, I've taked just before the front leds installation.

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And is that a horn or TL speaker?
Thank you Bob, the speaker are Penaudio Chara and Charisma in a three channel configuration, the "stand" cabinet is the bass unit, the upper unit have others two channels.
This is a good review: Penaudio's Chara-Charisma -- Is Compromise A Good Thing? Review By Rick Jensen
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Old 7th December 2012, 11:19 AM   #839
AndrewT is offline AndrewT  Scotland
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Sprague must be OK. I have not heard anything bad by using it.
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Old 10th December 2012, 08:43 PM   #840
atupi is offline atupi  Romania
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Finally i have some good speakers (XTZ 99.26) now and i can say the alternate config of RC (390R-220uf) sounds much better, better imaging and details. Maybe can be fatigueing on some "bright" speakers but not on my ribbon tweeters.
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