Frequency Response Analyzer in Pocket CLIO

[AnkurOberai]

How can we measure the frequency response of an audio amplifier using pocket CLIO? The company, Audiomatica, claims that frequency response of an audio amplifier can be analyzed using pocket CLIO but does not explain the procedure. Can anybody help?

 

[PRR]

Looks like you connect Pocket OUT to amplifier IN, load amplifier as needed, and connect amplifier OUT to Pocket IN. Adjust Pocket OUT levels so the amplifier is not overloaded. Adjust Pocket IN levels so Pocket has happy level. Then run a sinusoidal frequency response.

 

[AnkurOberai]

Guys at audiomatica said that I would need a decoupling transformer as the input and output are not balanced, and they have a common ground. How does that work?

 

[qQxSzbwqYW]

Hi!

I thought that’s only for bridged amps!?!??

Already once connected pocket to simple amp, all naive trivial connected, worked fine.
Id be concerned measuring more transformer than amp, unless that thing costs a fortune.

Guess one needs a special transformer with 4-8Ohms on input to load the amp trivial, then somewhat 100-300 Ohms output to match the clio??
I simply loaded the amp with a 8 ohms resistor parallel to clio.

Cheers
Josh

 

[qQxSzbwqYW]

If the only problem is the ground between input and output... maybe that transformer could be also on the amps input.
Then a simple DI box would be enough. Just need to measure the DI box and compensate it. What do the experts think??