TOPPING A50 Desktop Headphone Amplifier - Rapallo | AV Design & Installation
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TOPPING A50 Desktop Headphone Amplifier

$399.00 inc GST

The Topping A50 is an efficient and affordable sedentary headphone amplifier.

Its careful design makes it an ideal ally for any audiophile wishing to enjoy a rich and clear headphone listening experience. The amplifier is Hi-Res certified, a label that guarantees a very good sound quality.


Balanced / Single-ended connectivity
For its connectivity, the A50 is both simple and very efficient. It integrates a single stereo RCA input but has 3 headphone outputs, one of which is balanced on a 2.5mm jack connector. A stereo RCA line output is also available on the back of the unit.


Aluminium case
The components of the A50 Topping are hidden under a beautiful and robust CNC machined Aluminium housing. It is also designed to effectively dissipate the heat released by the power supply and PDOs.


Digital volume
The A50 scans the position of the volume knob and transmits the data to the JRC1195 controller for a precise adjustment of the volume level. This chip also provides a perfect volume balance between the left and right channels.


The amplifier includes a pair of LME49720 PDOs mounted on a DIP8 bracket. It is therefore possible to easily replace these PDOs to adapt the sound reproduction to your listening experience.


Regulated power supply
The power supply circuit of the A50 is stabilized by low noise TI TPS7A33/47 linear regulators. These high-performance chips provide clean and stable power to all A50 circuits.


A50 Headphone amplifier + P50 Power supply + D50s DAC Association
The Topping A50 completes the range also composed of the P50 and D50s. The combination of these products is ideal and allows you to benefit from a complete and efficient system. The D50s DAC allows efficient digital-to-analog conversion, supports high-resolution files and allows Bluetooth transmission. The ultra-low noise regulated linear power supply P50 will provide the A50 and D50s with an extremely clean power supply, allowing them to reach their full potential.



Product type Headphone amplifier
Input 1x Stereo RCA
Outputs 1x Stereo RCA
1x Single-ended Jack 3.5mm headphone output
1x Single-ended Jack 6.35mm headphone output
1x Balanced Jack 2.5mm headphone output
THD+N : Single-ended output (@ A-Weighting) < 0.0006% @ 1kHz, 100mW 32Ω
< 0.0015% @ 20Hz – 20kHz, 100mW 32Ω
< 0.0006% @ 1kHz, 12mW 300Ω
< 0.0006% @ 20Hz – 20kHz, 12mW 300Ω
THD+N : Balanced output (@ A-Weighting) < 0.0016 @ 1kHz, 100mW 32Ω
< 0.0022% @ 20Hz – 20kHz, 100mW 32Ω
< 0.0004% @ 1kHz, 50mW 300Ω
< 0.0004% @ 20Hz – 20kHz, 50mW 300Ω
SNR (@ A-Weighting) 123dB @ 1kHz
Dynamic range (@ A-Weighting) 123dB @ 1kHz
Frequency response Gain 0dB : 20Hz – 20kHz ±0.6dB
Gain 9dB : 20Hz – 40kHz ±0.6dB
Output level Single-ended, Gain 0dB : 10.6Vpp
Single-ended, Gain 9dB : 20Vpp
Balanced, Gain 0dB : 21.4Vpp
Balanced, Gain 9dB : 40Vpp
Noise (@ A-Weighting) Single-ended, Gain 0dB : < 3µVrms
Single-ended, Gain 9dB : < 5µVrms
Balanced, Gain 0dB : < 5µVrms
Balanced, Gain 9dB : < 10µVrms
Output impedance Single-ended : < 4.7Ω
Balanced : < 9.4Ω
Output power Single-ended, Gain 0dB : 2x 1110mW @ 32Ω, THD+N < 1%
Single-ended, Gain 9dB : 2x 160mW @ 300Ω, THD+N < 1%
Balanced, Gain 0dB : 2x 2200mW @ 64Ω, THD+N < 1%
Balanced, Gain 9dB : 2x 640mW @ 300Ω, THD+N < 1%
Compatible headphone impedance Single-ended : 16-300Ω
Balanced : 16-600Ω
Case material Aluminium
Dimensions 11 x 12.3 x 2.6cm
Package 1x Topping A50
1x Power supply

Additional information

Weight 5 kg
Dimensions 11 × 12.3 × 2.6 cm

Why buy from us?

Rapallo is an independently owned New Zealand company and with more than 15 years experience, we offer you both technical expertise and superior service.

Rapallo is fully authorized to sell products by all of the manufacturers listed on our website and in our store. In most cases we are more than a reseller, we are a direct dealer who also receives training and where possible we personally test products we sell.

Authorized dealers like us offer peace of mind. Rapallo

  • meets manufacturer’s standards, from sales to service, in order to receive authorized status.
  • often receives training directly from manufacturer representatives and shares that expertise with you.
  • provides  support for all the products they sell.
  • ensures that manufacturer warranties will be honoured.
  • buys directly from big brand manufacturers and guarantee you buy NZ new, (no grey imports or parallel imports).

The Internet is an incredibly convenient information source and a wonderful way to find savings on the products you want. Protect yourself online by buying from authorized dealers, with genuine feedback and reputations.

A price too good to be true, usually is.
If you’ve ever searched for a product on a shopping engine (such as Priceme/Pricespy) you may have asked yourself, “Why are some stores charging so much less than other stores?”

Our customers often share these stories with us, so we thought we would share a few with you, in hopes that you don’t fall prey to any of these unscrupulous sales tactics.

  • Goods may be grey market/parallel imported. They may state that the product includes the manufacturer warranty, but not tell you that the warranty is valid only in Europe, Japan, or South America, and NOT in NZ.
  • You may be asked to buy an expensive extended warranty. In many cases if you do not purchase the warranty, your purchase will be denied. (The product is now out of stock, your card does not go through, etc.)
  • Included parts may be sold to you separately. Some resellers will open boxes and charge extra for parts that are normally included by the manufacturer.
  • Hidden charges which don’t show up until your credit card statement arrives, these charges only show up when your credit card statement is sent to you.
  • When something goes wrong, faulty, late delivery, doesn’t matter how many times you try to email, they don’t get back.
  • There are so many scamming online sellers today, “buyer beware” protect yourself!

Think you have a better price from someone in NZ (authorised dealer)? Call us, we’ll see what we can do.

12 months interest free over $1,000 or 18 months interest free over $2,000 finance available (on non-discounted items). Apply here.

Call us 09 2744515

Concerned About Fraud?

The internet has become a more popular source for online shopping, regrettably we have seen more and more instances of fraud affecting online shoppers. Companies trading under many  different names, loading warranties and charging for them as extras when often they are included from the manufacturer. Parallel imports or personal imports where the NZ supplier refuses to repair when things go wrong is often alarming to the unsuspecting purchaser. Inflated freight charges, customs and GST at the border are often forgotten as a buyer is tempted by a lower price. Constantly we hear all these stories, once bitten it’s all to late looking for that refund or replacement. The stories are outrageous at times, customers from Trademe and ebay with no place to turn, time consuming and very frustrating….

So how do you protect yourself from online fraud?

  • Buy from an authorized reseller. If you are at all suspicious, contact the manufacturer directly and ask if a company is authorized to sell their products.
  • Make sure you get a company invoice with GST clearly marked.
  • Make sure you buy from someone who has a phone number and an address on their website, not a P.O.Box number
  • Read customer feedback, you can usually tell if it’s genuine or not.

We hope that you will become our next happy customer. And we promise to offer you superior service before, during and after your purchase.



Customer support is very important to us. Deano, Boris or Simon are on-hand for you via Phone, Online Chat, Email and Social Media. We're here to help, no matter if the question is big, or small!


We are 100% NZ owned, and our product specialists are here to help you with your questions. Or perhaps pop in & experience our Demo Rooms for the ultimate in "try-before-you-buy".


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11A Allens Road
East Tamaki
Auckland 2013
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Saturday 9:00-12:00
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