Fidelity Audio HPA-100 headphone amplifier, original box -5 star review WhatHiFi. In excellent condition....now have an amplifier with a headphone amplifier. RM Special Delivery in UK, collection welcome....or overseas but only using eBays Global Shipping If you appreciate wide-open, clear and detailed sound then you need to hear our Fidelity Audio HPA-100 headphone amplifier. Starting with the power supply, this solidly handmade, dual mono amp features a high quality toroidal transformer, ultra-fast 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 Fidelity Audio HPA-100 headphone amplifier will satisfy the demands of your cans (see full specifications) and of your ears. Compact in size and sturdy in build the Fidelity Audio HPA-100 headphone amplifier will neatly grace any Hi-Fi rack or desktop. 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): 0.00006% 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% DC voltage: Low Noise Linear dual power supply +15V & -15V Size: (approx.) W: 104 x H:56 x D:245 (mm) including controls & feet Weight: 1.04 Kg (1.55 Kg including packaging) 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 Audio grade 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 The unit IS NOT supplied with an RCA lead Mains lead supplied