Re: Budget T-Amp Shootout - Lepai vs. Indeed TA2020

Did some relative power tests on the Indeed TA2020 and the new larger TA2021.

I used my measurement gear and TrueRTA. With both Indeed amps, you can crank them all the way up without distortion, so I set both volume controls to max and measured the following: 1) 1k sine wave 2) Quick Sweep 3) Pink Noise (100 averages)

All I was curious about was a relative difference. Nothing is SPL correct.

Here are the squiggles:

1) 1k sine:

2) Quick sweep:

3) Pink noise:

So anyway...the TA2021 is indeed (pun intended) more powerful. I'm a little confused as to why the pink nose registered almost a 5db difference while the quick sweep registered only 2db. The 1k sine wave showed a 2db difference as well. So.....given the relative combined differences, I'd estimate it to be twice as powerful as its little brother, the TA2020.

That should put the TA2021 around a solid 8-10 watts per channel. There's no chance of it pumping out 25 watts as specified. Even with the volume maxed out, the music still sounds extremely clear in both Indeed amps, which is in stark contrast to the Lepai TA2020 amp which heavily distorts once you throttle the volume past the half-way mark.

Did some relative power tests on the Indeed TA2020 and the new larger TA2021.

I used my measurement gear and TrueRTA. With both Indeed amps, you can crank them all the way up without distortion, so I set both volume controls to max and measured the following: 1) 1k sine wave 2) Quick Sweep 3) Pink Noise (100 averages)

**EDIT: With these test tones, I measured the response of a speaker without taking any care to reduce room influence. Just trying to avoid any confusion.**All I was curious about was a relative difference. Nothing is SPL correct.

Here are the squiggles:

1) 1k sine:

2) Quick sweep:

3) Pink noise:

So anyway...the TA2021 is indeed (pun intended) more powerful. I'm a little confused as to why the pink nose registered almost a 5db difference while the quick sweep registered only 2db. The 1k sine wave showed a 2db difference as well. So.....given the relative combined differences, I'd estimate it to be twice as powerful as its little brother, the TA2020.

That should put the TA2021 around a solid 8-10 watts per channel. There's no chance of it pumping out 25 watts as specified. Even with the volume maxed out, the music still sounds extremely clear in both Indeed amps, which is in stark contrast to the Lepai TA2020 amp which heavily distorts once you throttle the volume past the half-way mark.

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