Apos Audio TOPPING Headphone Amp TOPPING A50s Headphone Amplifier

TOPPING

TOPPING A50s Headphone Amplifier

Name: TOPPING A50s Headphone Amplifier
Brand: TOPPING
Price: 186.15 USD
Availability: OutOfStock

Dang it.

This product has bought the farm. It's been put out to pasture. It has passed on. It has ceased to be. It is no more. Luckily, we have a great alternative in the TOPPING A50s III.

Although a dead ringer for its predecessor, the TOPPING A50s is a headphone amp with specs that outshine the A50 in nearly every way.

Don’t Look Down

With a THD+N of 0.00007% and SNR of 143dB, the TOPPING A50s’ noise floor is so far down you might get dizzy. Compare this to the original A50, which has a THD+N of <0.0004% and an SNR of 123dB.

The Power Hitter

The TOPPING A50s swings for the fences with its output power, driving a whopping 3,500W x2 @32Ω (more than 1,000mW more powerful than the A50). With that sort of power, you can drive anything from sensitive IEMs to power demanding headphones.

6.35 Single-Ended and 4.4 Balanced Outs

The A50s offers both a 6.35 single-ended and a 4.4 balanced out on its front plate. Both options deliver stellar dynamic range (138dB/144dB) and output impedance (<0.1Ω/0.2Ω).

High-Low Gain Setting

Drive high impedance headphones with ease thanks to the A50s’ high-low gain setting of 0dB/6dB at the SE output and 6dB/12dB at the balanced output.

Specs

THD+N @1 kHz A-wt

6.35mm headphone jack

<0.00007% @Output=850mW(32Ω)
<0.00006% @Output=90mW(300Ω)

4 4mm Balanced headphone jack

<0.00007% @Output=3.4W(32Ω)
<0.00006% @Output=367mW(300Ω)

THD ©20-20kHz 90kBW

6.35mm headphone jack

<0.0004% @Output=720mW(32Ω)
<0.0002% @Output=77mW(300Ω)

4 4mm Balanced headphone jack

<0.001% @Output=2.88W(32Ω)
<0.0005% @Output=307mVV(300Ω)

SNR @MAX OUT 1 kHz A-wt

6.35mm headphone jack: 137dB
4 4mm Balanced headphone jack: 143dB

Dynamic Range @1 kHz A-wt

6.35mm headphone jack: 138dB
4 4mm Balanced headphone jack: 144dB

Frequency Response: 20Hz-200kHz(±0.05dB)
Output Level

6.35mm headphone jack: 21Vpp
4 4mm Balanced headphone jack: 42Vpp

AP measured noise level @A-wt

6.35mm headphone jack

<0.7uVrms @G=L
<0.8uVrms @G=H

4 4mm Balanced headphone jack

<0.9uVrms @G=L
<1.1uVrms @G=H

Actual noise level * @A-wt

6.35mm headphone jack

<0.3uVrms @G=L
<0.45uVrms @G=H

4 4mm Balanced headphone jack

<0.6uVrms @G=L
<0.95uVrms @G=H

Channel Crosstalk @ 1kHz

6.35mm headphone jack: -86dB
4 4mm Balanced headphone jack: -128dB

IMD CCIF@(18kHz + 19kHz)

6.35mm headphone jack: -116dB
4 4mm Balanced headphone jack: -116dB

IMD SMPTE @(60Hz + 7kHz)

6.35mm headphone jack

-110dB, SMPTE4: 1
-118dB, SMPTE1: 1

4 4mm Balanced headphone jack

-110dB, SMPTE4: 1
-118dB, SMPTE1: 1

Input Sensitivity

6.35mm headphone jack

7.5Vrms @G=0dB
3.8Vrms @G=6dB

4 4mm Balanced headphone jack

7.5Vrms @G=odB
-3.8Vrms @G=6dB

Gain

6.35mm headphone jack

0.0dB @G=0dB
6.0dB @G=6dB

4 4mm Balanced headphone jack

6.0dB @G=0dB
12.0dB @G=6dB

Output Impedance

6.35mm headphone jack: <0.1Ω
4 4mm Balanced headphone jack: <0.2Ω

Output Power THD+N<1%

6.35mm headphone jack

1.4W x 2 @32Ω
192mW x 2 @300Ω

4 4mm Balanced headphone jack

3.5W x 2 @32Ω
760mW x 2 @300Ω

Output Power @2Vrms

6.35mm headphone jack

485mW x 2 @32Ω
52mW x 2 @300Ω

4 4mm Balanced headphone jack

1950mW x 2 @32Ω
208mW x 2 @300Ω

Load Impedance

6.35mm headphone jack: >8Ω
4 4mm Balanced headphone jack: >8Ω

Featured reviews

"A mini A90...a bulldog of an amplifier." -Joshua Valour

"An incredible amount of driving power." -DMS

"It's a mini A90...go out and buy one." -Z Reviews

"Precise, pinpoint imaging." -SoundNews