ATI AT6000 Signature Amplifier Review

[RichB]

Here are some voltage measurements taken comparing the AT6002 and AT522NC (NCore amps) driving a Salon2 bi-amplified. I used this formula provided by Gene: =10*LOG(r3/44)

The AT522NC is louder than the AT600 at 50Hz and less loud at 250Hz.

- Rich

 

[PENG]

View attachment 23753

Here are some voltage measurements taken comparing the AT6002 and AT522NC (NCore amps) driving a Salon2 bi-amplified. I used this formula provided by Gene: =10*LOG(r3/44)

The AT522NC is louder than the AT600 at 50Hz and less loud at 250Hz.

- Rich

Interesting, that seems like a lot of difference though, how (like what test tone) did you measure the voltage and with which meter (model number)?

 

[RichB]

Interesting, that seems like a lot of difference though, how (like what test tone) did you measure the voltage and with which meter (model number)?

It's a el Cheapo Radio Shack meter: Cat No. 22-810. It's consistent though.
The tracks are pure tone WAV files I found somewhere on the internet.

Do you have good source for WAV or FLAC tones?

-Rich

 

[PENG]

It's a el Cheapo Radio Shack meter: Cat No. 22-810. It's consistent though.
The tracks are pure tone WAV files I found somewhere on the internet.

Do you have good source for WAV or FLAC tones?

-Rich

You should be able to use REW' s level checking tone.

A cheapo from RS may not be suitable for the audible band. Consistency is a plus, at least you can say one is louder than the other, but the actual voltage differences could be larger, or smaller than your measured values.

 

[RichB]

You should be able to use REW' s level checking tone.

A cheapo from RS may not be suitable for the audible band. Consistency is a plus, at least you can say one is louder than the other, but the actual voltage differences could be larger, or smaller than your measured values.

WAV files would be better since adding my PC to the mix complicated things, especially in the game room.

- Rich

 

[PENG]

WAV files would be better since adding my PC to the mix complicated things, especially in the game room.

- Rich

Understood, so what frequency did you use?

I googled and found the manual for the 22-810. It does not say anything about true rms and nothing about frequency vs accuracy.

All it says is:

So my only suggestion is, use the lowest possible scale, and use a lower frequency that is closer to 60 Hz, say 100 Hz, if you can.

The thing is, 0.2V makes a difference of about 0.5 dB, so accuracy of the meter is quite important.

 

[RichB]

I have a better meter, so I'll try that one over the weekend.

- Rich

 

[PENG]

I have a better meter, so I'll try that one over the weekend.

- Rich

I forgot one thing, for level matching purposes, accuracy in absolute sense is not as important as consistency/repeatability. If you take the voltage measurements multiple times under exactly the same condition, as long as the values remain the same, or within say 0.05 V or even 0.1 V then it should be good enough. If not, then you may have to try another meter or go to plan B such as REW and a good mic.