I have had a phono amp which was very clear on DIP setting on cartridge output in mV. Recently, I changed to a new phono amp that only stays XX db gain on soldering a feedback resistor. My cartridge is 0.55mV output, how much db gain I needed? Thanks
Well, if you really need such a high output voltage, you would need 73dB Gain.
20*log(2.5/0.00055)
Michael
20*log(2.5/0.00055)
Michael
The difficulty with levels is because CD sources are rated by maximum output level (typically 2Vrms), while vinyl levels are at nominal values, corresponding to 5cm/s stylus velocity. Most cartridges can track much more than this; in the treble range some can do well over 50cm/s, corresponding to peaks that are 20dB above nominal.
In my system, 0.5V nominal output from the phono stage is a convenient value, but it obviously depends on the whole system. With 0.55mV source, this is close enough to 60dB of gain.
In my system, 0.5V nominal output from the phono stage is a convenient value, but it obviously depends on the whole system. With 0.55mV source, this is close enough to 60dB of gain.
2.5 Vrms sounds much as output voltage. The best thing you could do is actually listen and adjust according to that.
The analog "Line" input of the amplifiers is calibrated nominaly to 0dBu at 0.775mVrms. The "CD" analog input should be calibrated to +4dBu to admit a nominal 1.23Vrms.
- Status
- Not open for further replies.