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Old 11th March 2007, 12:10 PM   #1
tadiam is offline tadiam  Argentina
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Angry diy helppppp

Diyers help

I build an channel of naim clone this work well..but have an question…
When turn on/off the amp have an small boom in my diy probe speaker…I tester the speaker terminals an have tension in the moment of turn on/off…an second or less..after is ok 0V (normal ) at 40ma…
Is normal this problem….the sound is good this have best detail an more bass,,,, (p3a) is good but less fine

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Old 11th March 2007, 06:07 PM   #2
tadiam is offline tadiam  Argentina
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Default neeed

need an reply of my last post friends
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Old 11th March 2007, 09:06 PM   #3
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How much is the turn-on voltage? Did you test with input connected, to what? Is your probe speaker particularly efficient?

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Old 11th March 2007, 10:12 PM   #4
tadiam is offline tadiam  Argentina
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Default re thanks

Hello
Thanks for the reply
I coment:
Tension 24v +/-
Have connected in input an radio or cd the volume level is off…
When turn ON have more or less 10v for an second and when turn OFF have 5v or lesss….
The sound is very good better the p3a but have this inconvenient…. this is normal in the naim amps or circuits type…..
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Old 11th March 2007, 10:46 PM   #5
jaycee is offline jaycee  United Kingdom
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If what you're describing is turn-on thud, then this is normal for some designs of amplifier (typically it's the transistors in the LTP part suddenly conducting because the current source starts).

If the amp works fine otherwise, connect a DC detect/power on thud eliminator circuit the output - basically, a relay to keep the speakers disconnected for 3-4 seconds on power-up. You'll find this in most amps.
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Old 12th March 2007, 10:15 AM   #6
tadiam is offline tadiam  Argentina
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ok jycee
too build an quasi arcam 60 clone an the output schema is the same and no have this problem...ok
the original naim have this bump in the output when turn on/off....
diego
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Old 12th March 2007, 10:17 AM   #7
tadiam is offline tadiam  Argentina
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Default opsss

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