Topping A70 Pro HP & Preamp Review

[Blashyrkh]

• Can DAC/Amp "optimized" for APx555 but show worse response with actual headphone?

<gif>Michael Jackson eating popcorn</gif>

 

[Verig]

Real world load, overshoot, HF problems. Seems normal, the level is really low. But of course does not quite match their material.

 

[Verig]

Do we need perfect square wave on Amp (not DAC) like sine wave?

No. Square waves / impulses don't make sense for sound. If THD/IMD is ok I don't know why you'd take a look at squares. Is there an explanation for this test? And for Topping's advertising?

 

[shrimp_dude]

Anyone have a video or link to a video that shows the screen in action? You'd think a product with a screen with digital meters would be easy to find examples of it in motion.

 

[RangerAudio]

Anyone have a video or link to a video that shows the screen in action? You'd think a product with a screen with digital meters would be easy to find examples of it in motion.

There are no reviews out of the product, other than this one*. Which is sad. It's a promising product for sure.

 

[moosso]

I'm using Topping DX7 Pro+ currenctly and consider to upgrade, this looks attractive so I'm checking reviews about it.
About the real load test, I checked Hypex DIYpreamplifier's measurement, it has state of art performance too, I guess it just a hair better than A70 Pro for the high frequency IMD.

No. Square waves / impulses don't make sense for sound. If THD/IMD is ok I don't know why you'd take a look at squares. Is there an explanation for this test? And for Topping's advertising?

I know real world does not have square waves, but topping's material is a bit confusing me.
What's the difference if an AMP does not have overshoot issue? Can we see the difference from regular measurements?

Anyone have a video or link to a video that shows the screen in action? You'd think a product with a screen with digital meters would be easy to find examples of it in motion.

I found no videos too, only pictures.

 

[szaki1001]

I made a quick video of my own device, but I don't know how to insert it.

 

[staticV3]

I made a quick video of my own device, but I don't know how to insert it.

Upload it to YouTube, set the video to unlisted so that only those with the link can find it, then post the link here.

 

[szaki1001]

Upload it to YouTube, set the video to unlisted so that only those with the link can find it, then post the link here.

• I've never uploaded to YouTube, but I'll try!

 

[szaki1001]

 

[shrimp_dude]

Exactly what I wanted to see. Thanks!

 

[ObjectiveSubjectivist]

I'm using Topping DX7 Pro+ currenctly and consider to upgrade, this looks attractive so I'm checking reviews about it.

Wait till DX9

 

[szaki1001]

The drive is Ifi Neo Stream, 24 bit/xxx file.

Surprisingly fine sound, no sharp highlights. Perhaps due to the drive (iFi), a warmer tone, which is very good for many headphones.

Dynamics, stage, balanced sound. I love it! Sadly I sold my Hifiman HE1000SE headphones, and they would have winged it!

 

[Tony Roma]

Hi, anyone who has this amp getting distortion ?, i am getting it on the right channel on some music at higher volumes.

 

[szaki1001]

Hi, anyone who has this amp getting distortion ?, i am getting it on the right channel on some music at higher volumes.

I don't hear any distortion. Alison Balsom - Caprice. No distortion, but I will test it on wilder music and write about it. I'm falling now, she has such a beautiful voice! More low notes, punchier, faster. Requires a silver cable.

 

[Tony Roma]

I don't hear any distortion. Alison Balsom - Caprice. No distortion, but I will test it on wilder music and write about it. I'm falling now, she has such a beautiful voice! More low notes, punchier, faster. Requires a silver cable.

What sort of volume are you listening at?

 

[HYQID]

Hi, anyone who has this amp getting distortion ?, i am getting it on the right channel on some music at higher volumes.

Maybe yours is broken.

 

[Tony Roma]

It’s definitely the amp as have just tried another and it’s fine

 

[szaki1001]

What sort of volume are you listening at?

Low gain, -28 cB. The volume also depends on the music. The volume also depends on the music. Classical music requires more volume for the same sound pressure.

 

[moosso]

It’s definitely the amp as have just tried another and it’s fine

You can do a simple test, try swap the headphone connector (if your headphone has dual connectors), if the left channel start distort after swap then it's on the amp, if distortion still at right channel then it's on your headphone.
I think this amp is suit for low sensitivity planars, it can clip or destory other headphones easily.

Wait till DX9

Yes though I don't know why topping start putting orange LED in their new amps (EHA5, DX9), maybe it can make the sound warmer.