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Old 5th June 2010, 11:35 AM   #1
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Question Anyone upgraded a 740A Cambridge Audio ?

Anyone upgraded a 740A Cambridge Audio ? i have a 740A and an Arcam Delta 290 , in terms of power the Arcam is more powerfull than the Cambridge , even though the Cambridge has 25W more...
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Old 1st April 2011, 12:05 PM   #2
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anyone ?
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Old 1st April 2011, 01:52 PM   #3
lineup is offline lineup  Sweden
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Cambridge is a good amplifier.
I should not upgrade it.
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Old 8th April 2011, 12:28 PM   #4
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anyone ?
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Old 8th April 2011, 12:33 PM   #5
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Do you have the service manual and schematic for it ??? By looking at it a couple of us could make some suggestions.
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Old 8th April 2011, 04:01 PM   #6
jaycee is offline jaycee  United Kingdom
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Knowing Cambridge, the power supply capacitors are undersized rubbish. Another problem however is poor heatsinking, so while upgrading the supply capacitance might help, it'll probably cause the amp to die when the power supply will no longer sag quite so much to protect the outputs from overheating
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Old 9th April 2011, 12:09 PM   #7
Dave S is offline Dave S  United Kingdom
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This German company seems to offer mods - mostly component changes it would seem:

hoer-wege Modifikation für CAMBRIDGE AUDIO azur Verstärker 740A

From the pics and my experience the more upmarket CAs are well designed and built.

Heat in the o/p stage is much more related to load impedance and output level than a bit less voltage sag on the supply rails. I suspect the CA has a protection thermistor anyway.
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Old 21st November 2012, 09:27 AM   #8
silence is offline silence  Denmark
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did you mod it? did you find the servicemanual/schematics?
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Old 21st November 2012, 10:23 AM   #9
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I think I now have the service manual for this amp if youre interested, send me pm with email address.
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