My_Ref Fremen Edition RC - Build thread - Page 42 - diyAudio
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Old 30th September 2012, 09:52 AM   #411
bcmbob is offline bcmbob  United States
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Quote:
Originally Posted by SoIL4x4 View Post
By the way Bob I did finish my cat 5 speaker cables and have to say they do have a positive effect on the sound of my system. The bass is more defined and the highs are crystal clear. Thanks for the heads up.


My fingers just recovered!
Glad to hear you like the cables. They provide a significant improvement at minimal cost. Well worth the effort....... and the sore fingers


Also wanted to add if builders don't want to post their ststus for any reason, a PM to Dario would be great.
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Last edited by bcmbob; 30th September 2012 at 10:22 AM.
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Old 30th September 2012, 10:35 AM   #412
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Originally Posted by ClaveFremen View Post
Which Caddocks? I can't see any in your build...
sorry mixed up with Takmans
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Old 30th September 2012, 10:41 AM   #413
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Originally Posted by dtses View Post
sorry mixed up with Takmans
Ah! OK

Then the answer is:

yes, I would replace them.

Use SMD thin film resistors, with a low TCR (<=50ppm)
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Old 30th September 2012, 10:43 AM   #414
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Originally Posted by PreSapian View Post
dtes you sound like me when i first started the journey of modding myrefc.

if you're to look at my earliest posts on 'new myrefc' thread, i'm always complaining about lack of bass, much like you.
then after many swapping of components as recommended by dario, i don't remember exactly when and after which swap, but myrefc's bass improved to where now it's simply the best bass i have heard.
thanks mate!
You gave me a hope! will try to replace parts one by one and stick to the BOM then as this is the only option now.

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yes, I would replace them.

Use SMD thin film resistors, with a low TCR (<=50ppm)
grazie
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Old 30th September 2012, 10:45 AM   #415
AndrewT is offline AndrewT  Scotland
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I saw recently a Member reporting that all 0.1% tolerance (thin film) smd are metal film and that all 1% tolerance (thick film) smd are metal oxide.

Is this universal?

Does the metal oxide perform sonically as well as the metal film? I am assuming the resistance value is identical.
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Old 30th September 2012, 11:03 AM   #416
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Originally Posted by dtses View Post
grazie
Prego (you're welcome)

Please note that it's not easy to find good sounding SMD resistors, I can't guarantee that the ones you'll buy will sound with full bass.

Try to find Nichrome ones

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Originally Posted by AndrewT View Post
I saw recently a Member reporting that all 0.1% tolerance smd are metal film and that all 1% tolerance smd are metal oxide.
Hi Andrew,

Really?

IMHO it's a simply absurd generalization.

While most of the 0.1% are thin film or bulk foil, in 1% tolerance thin film, thick films, and metaloxide are all available.

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Originally Posted by AndrewT View Post
Does the metal oxide perform sonically as well as the metal film? I am assuming the resistance value is identical.
If you trust in this sort of things... no.

Usually Metal oxide sound harsher and less detailed than metalfilms.
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Old 30th September 2012, 11:32 AM   #417
billo44 is offline billo44  United Kingdom
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Default Sounds good

Finally got my FE RC build working today....
Shoe-horned into my 'my ref rev C' chassis, and using the obligato input caps and lightspeed passive pre I used in that build. This was mostly because of lack of money, but also means I can compare with my memory of how the my ref rev C ultimate bom sounded last week.
All worked with no hum or problems straight away, measured 13 mV and 16 mV DC R/L at the output.
I will wait a week or so before getting too sentimental, but the sound is already very good after a few hours...
Thanks Dario, it's sounding good!

Bill
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Old 30th September 2012, 11:58 AM   #418
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Originally Posted by billo44 View Post
Finally got my FE RC build working today....
Hi Bill,

Good news!

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Originally Posted by billo44 View Post
All worked with no hum or problems straight away, measured 13 mV and 16 mV DC R/L at the output.
Fine, expect DC offset to lower in some days.

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Originally Posted by billo44 View Post
I will wait a week or so before getting too sentimental, but the sound is already very good after a few hours...


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Originally Posted by billo44 View Post
Thanks Dario, it's sounding good!
You're welcome.

I've seen you're using a ground breaker to connect PGND to safety earth.

When you can, please, try to disconnect PGND from modules and tell us if you hear a difference (pay attention to soundstage).
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Old 30th September 2012, 01:34 PM   #419
bcmbob is offline bcmbob  United States
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Bill, I can't see where you are getting power for the Lightspeed PS.

Are the large white wires going to the front connected to pots?
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Old 30th September 2012, 02:39 PM   #420
billo44 is offline billo44  United Kingdom
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Hi Bob,
Power for the lightspeed is tapped from one of the large smoothing caps via a regulator suggested by Regi Regi on the My ref rev C ultimate BOM thread.
That's the brown proto board with five caps center right.

White leads are cheap cat 5 lan cable, I just use one for each channel, going to a headphone socket/switch set up.

It's all a bit patched up and shoddy since I added the headphone output as an afterthought.... still don't have the resistor values right...
Next time!

Bill
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