New Topping L70 is just insane.

[Human Bass]

Topping just released their top of the line headphone amp of the L family and the specs are insanely good: fully balanced, a tad more power than the A90 in all impedances except 16ohms, relay knob.

They even got rid of the massive power brick that plagued the L30 and 50. And all that for 350 bucks. Thats just crazy, not only decimates the competition, but also the A90 and A30pro.

TOPPING L70 Full Balanced NFCA Headphone Amplifier 4Pin XLR/4.4 Balanced/6.35mm SE Output Amp With Remote Control

Features:- >Fully Balanced Headphone Amp Circuit. >Pre-Amp Support. >Multiple Headphone Output Ports(4-pin XLR+4.4mm Bal+6.35mm SE). >Relay Volume Control. >Volume Memory Function. >NFCA Amplification Modules. >Clean and Powerful Output. >High Dynamic Range. >Ultra-Low Noise-Floor...

hifigo.com

 

[enricoclaudio]

Looks like a winner on paper. Let's see how it behaves on the bench. Looking forward to see it reviewed by @amirm any time soon. However, I have no intentions to replace my A90D with the L70

 

[Human Bass]

Looks like a winner on paper. Let's see how it behaves on the bench. Looking forward to see it reviewed by @amirm any time soon. However, I have no intentions to replace my A90D with the L70

The L70 is a blessing for more humble folks like me. 250 dollars less is huge.

 

[Phoney]

Looks like a winner on paper. Let's see how it behaves on the bench. Looking forward to see it reviewed by @amirm any time soon. However, I have no intentions to replace my A90D with the L70

We all know how it will measure.

 

[staticV3]

Looks like a winner on paper. Let's see how it behaves on the bench.

Here's how it behaves on the bench:
https://www.l7audiolab.com/f/topping-l70/

 

[NiagaraPete]

Nice set of features.

 

[enricoclaudio]

Here's how it behaves on the bench:
https://www.l7audiolab.com/f/topping-l70/

Yes, I saw that but those are pre amp mode measurements, not headphone amp mode measurements. I want to see headphone amp mode measurements....

PS: I know it's going to measure out of the charts and most likely it's going to get on top of the list, but again, I want to see a full measurements review by @amirm

 

[marcom22]

Yes, I saw that but those are pre amp mode measurements, not headphone amp mode measurements. I want to see headphone amp mode measurements....

PS: I know it's going to measure out of the charts and most likely it's going to get on top of the list, but again, I want to see a full measurements review by @amirm

Are you sure:

??????

 

[marcom22]

Only one question, I dont understand why in 16ohm is so "bad" ?

 

[enricoclaudio]

Are you sure:

??????

Totally missed those. Thanks

 

[Human Bass]

Only one question, I dont understand why in 16ohm is so "bad" ?

Not bad, just not super mega powerful, but still quite powerful

 

[marcom22]

Not bad, just not super mega powerful, but still quite powerful

I spoke about the distortion and not the power

 

[solderdude]

Only one question, I dont understand why in 16ohm is so "bad" ?

Delivering current is much more 'challenging' than just voltage and demands more from the feedback loop.
3.5W (7V/0.44A) with just 0.003% in 16ohm is still impressive.
When looking at 12ohm DCA headphones for instance, and 97dB/V it can still reach an impressive 114dB SPL peak.

 

[marcom22]

Delivering current is much more 'challenging' than just voltage and demands more from the feedback loop.
3.5W (7V/0.44A) with just 0.003% in 16ohm is still impressive.
When looking at 12ohm DCA headphones for instance, and 97dB/V it can still reach an impressive 114dB SPL peak.

It's clear now for me .... thanks man

 

[staticV3]

Totally missed those. Thanks

All the other tests is Wolf's review are of the headphone output as well, not the line out on the back. That's how he usually reviews headphone Amps anyway.

 

[escalibur]

Dat display looks so damn nice. A90D deserves L70 style upgrade!

 

[juliangst]

Doesn't perform that much better than my A30 Pro with heavy loads.

A30 Pro outputs ~4.5V at 8 Ohms.
L70 drops to 7V at 16 Ohms so I can imagine that it will have similar voltage as the A30 Pro at 8 Ohms.

The usual 16 ohm spec isn't really useful to me since my Aeons are 13 Ohm and some amps have a really large voltage drop below 16 ohms while others are not as current limited (like the A90d)

 

[L-Train]

This looks really good and the relay volume control is enough for me to upgrade from my L50 to this. However, looking at the specs the input sensitivity at high gain is 1.9Vrms which sounds like the output is guaranteed to clip at maximum volume with typical 2Vrms DACs. Is this correct?

 

[juliangst]

This looks really good and the relay volume control is enough for me to upgrade from my L50 to this. However, looking at the specs the input sensitivity at high gain is 1.9Vrms which sounds like the output is guaranteed to clip at maximum volume with typical 2Vrms DACs. Is this correct?

A90d input sensitivity is 3V and A30 Pro 2,7V. No idea why they do this. And yes, these amps can clip at max volume with a normal 4V balanced DAC

 

[L-Train]

A90d input sensitivity is 3V and A30 Pro 2,7V. No idea why they do this. And yes, these amps can clip at max volume with a normal 4V balanced DAC

Thanks. I just did a quick search on the forum too and it seems the input sensitivity for the A90 is specified post-attenuation (see this post), and since the L70 is said to have the same/similar topology I guess avoiding the last 1-2 clicks on the volume control with 2/2.1Vrms sources at high gain isn't the end of the world.