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Details about  Fidelity Audio HPA-100BK Headphone Amplifier 5 STARS

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Fidelity Audio HPA-100BK Headphone Amplifier 5 STARS
Item Ended
Item condition:
09 Nov, 2015 13:42:38 GMT
May not post to United States - Read item description or contact seller for postage options. | See details
Item location:
Doncaster, South Yorkshire, United Kingdom

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Item specifics

New: A brand-new, unused, unopened and undamaged item in original retail packaging (where packaging is ... Read moreabout the condition
Type: Headphone Amplifier
Manufacturer warranty: 2 years Brand: Fidelity Audio
Fidelity Audio: HPA-100 Headphone Amplifier

Fidelity Audio co uk

Visit my eBay Shop  

Fidelity Audio HPA-100BK Headphone Amplifier (Black Case)


HPA-100 reviewed in the October 2011 issue of What Hi-Fi (page 22)

View this review at the What Hi-Fi website

“Give the Fidelity Audio HPA-100 Headphone Amplifier plenty of time to run in, and you’ll have one of the finest headphone amplifiers anywhere near this price”

HPA-100 reviewed in the January 2014 issue of HiFi News (page 22)

“The spaces between the notes were amazingly explicit, falling back into the inky-black silence, and piano chords decayed with uncanny accuracy”

HPA-100 reviewed in the February 2011 issue of HiFi World (page 111)

“ was immediately noticeable that the Fidelity Audio HPA-100 Headphone Amplifier offered a more focused performance…”

“..the Fidelity Audio HPA-100 Headphone Amplifier appeared to be calmer in its approach to the music, while the more balanced presentation allowed room for its rich bass flavours to flood in. This added to the ability of the Fidelity to discern layers in the vocal performance while texture was more discernible. In effect, the vocal output was more 3D in nature. The human voice can express so many subtle emotions during a song and the Fidelity found it easy to plug into those feelings.”

“This is a well rounded and balanced piece of kit that provides welcome transparency and clarity, allowing any pair of headphones to sing.”

Review HiFi Choice issue 356 March 2012

“Trust me – long listening sessions with this unit will inspire not only respect, but genuine affection!”

“FUSS-FREE, compatible with any headphone, and sonically almost eerily pure and unsullied. Such honesty may not be for all tastes, but we love it”





If you appreciate wide-open, clear and detailed sound then you need to hear our HPA-100. Starting with the power supply, this solidly handmade, dual mono amp features a high quality toroidal transformer, ultrafast HEXFRED rectifier and our own Fidelity Audio smoothing capacitors.

The IEC power inlet allows you to connect a power cable of your choice. Volume control is taken care of by the Alps Blue, a volume control famed for its excellent channel balance. High-grade decoupling caps by Wima and Rubycon help to ensure the sound is never less than clean and musical, whilst also guaranteeing exceptional longevity. Extensively tested using headphones from Grado, Beyerdynamic and Sennheiser you can be sure the HPA-100 will satisfy the demands of your cans (see full specifications) and of your ears.

Compact in size and sturdy in build the HPA-100 will neatly grace any hi-fi rack or desktop. Customisable with different-coloured power LEDs, the HPA-100 can even be upgraded to HPA-200 specification.

  • Hand built to order in UK
  • Dual mono design
  • Large internal dual voltage power supply
  • Ultra Fast HexFred Rectifying Diodes
  • Super low ESR high ripple smoothing capacitors Quality Audiograde parts used throughout
  • High grade pcb copper tracks for optimal signal & voltage transfer
  • Gold Plated RCA Connectors
  • Easily drives Grado (eg 325i) , Sennheiser (eg HD650, HD800) , Beyerdynamic (eg T1 Tesla) & AKGs (eg K702 , Q701
  • IEC mains input
  • 2 year parts and labour warranty
  • 30 day money-back guarantee
  • The unit IS NOT supplied with an RCA lead
  • Mains lead supplied
  • Optional Green , Red or Orange LED indicator


Package Includes

  • HPA-100  Headphone Amplifer
  • Mains Lead
  • Instructions


Specification – HPA-100
Headphone impedance range: 12 to 600 Ohms
Headphone Jack: 1/4 inch (6.35mm)
Power output: (rms, both channels fully driven) 32 Ohms: >500mW/channel
Distortion: (THD + N @ 1kHz): 0.00003%
Frequency response: (-3dB) 32 Ohms load: 10Hz - 35kHz; 300 Ohms load: 10Hz - 38kHz
Channel balance: 0.5dB approx
Output Stage: 2x High Performance, low distortion high fidelity 250mA audio buffers
Supply voltage: AC 230V +/- 10% onto +15V & -15V DC dual power supply
Size: (approx.) W: 104 x H:56  x D:245 (mm) including controls & feet
Weight: 1.04 Kg (1.55 Kg including packaging)


Customer comments

I've been meaning to write to you to tell you how much I've been enjoying the HPA 100 headphone amp. Certainly the best headphone sound I've yet heard through my Senn. 600s - more space, better separation, more instrumental clarity, and a feeling off 'flow' to the music. It is a really good product.

Best wishes



I believe I have found a perfect pairing, that is your HPA 100 with the Denon D7000 headphones. The clean clarity of your amp including its deep but tight and controlled bass matches the smooth sound and extravagant bass of the Denons to perfection.

I have also been fortunate enough to be able to compare your amp with the Burson HA160 which is pretty good in itself but your amp has an extra dimension of transparency and detail.

Thank you for a great product.
Kind regards


Hi Brent,

I just wanted to leave you my initial impression of the HPA-100 which arrived with me last Thursday, very well built and sounded good , after approx 120 hours of continuous burn in this headphone amp leaped into a completely different league, exceptional deep controlled bass, open and very expressive in the midrange and very sweet treble , detail retrieval compares with headphone amps that have cost me 5 times the price of this one . In side by side comparison on a par with 2 of my headphone amps that cost over £1,000. In summary it punches far beyond its price point, tested with Sennheiser HD 650 (modded cable) and Klipsch Image X10's , Grado 325iS.

I am really enjoying it, as I said to you on the phone I have all sorts of high end kit, I tried it with a Linn Numerik and Benchmark DACs the best performance came from the modded Denon 3910, I also tried various mains cables, the RA signature was good but it seems to prefer a Clearer audio silverline, which has now found a permanent home .

Thanks for the great service

Paul Collins

All Fidelity Audio headphone amplifiers are hand built in the UK and come backed by our 2 year warranty.

Business seller information

Fidelity Audio
Company registration number: 4827376
VAT number: GB 829419403
I provide invoices with VAT separately displayed.

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