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Cayin HA-1A Headphone Amplifier

Sam Tellig says it best: “The HA-1A may be the best thing that’s ever happened to headphones… champagne sound for beer-budget bucks.” More below… 

“…If you’ve been driving a pair of quality headphones from the headphone jack of a preamp or integrated amp – or even if you already own a standalone headphone amp – the HA-1A may come as a revelation. How good can your present headphones sound? Probably very good indeed. So good that you might stop listening to your loudspeakers… The HA-1A breathes life and light into music in a way that transistors – and many tube amps – simply cannot. It makes musicians sound here, not there… The HA-1A has a way of making headphones sound less like cans (British slang for headphones) that is downright uncanny. And the HA-1A did bass – rich, full, tuneful, tight bass. I’ve always thought my Sennheiser HD 600s sounded a little thin and bass-shy. Such is not the case. The HA-1A may be the best thing that’s ever happened to headphones… champagne sound for beer-budget bucks.” – Sam Tellig, Stereophile 

“Pardon me, but that grasp you might have heard was me catching my breath and gathering my wits after unpacking the Cayin HA-1A headphone amplifier. Actually, make that ‘vacuum tube integrated headphone amplifier.’ A jewel box of a beauty, the Cayin is for the dedicated headphone aficionado – the pleasure-seeking hobbyist who prizes Mount Blanc pens, Panerai wristwatches, or cases of Antinori Solaia 1997.” – Neil Gader, The Absolute Sound 

Technical specifications: 

Device:Integrated vacuum tube headphone amplifier
Total harmonic distortion (THD):1% (1 kHz)
Unweighted signal-to-noise ratio:88 dB
Input impedance:Selectable
Input sensitivity:220 mV
Output power (RMS):2.2 Watt @ 8 Ohm (Ultralinear) 
1.2 Watt @ 8 Ohm (Triode)
Input power:280 Watt
Dimensions:130 x 300 x 230 mm 
5.1 x 11.8 x 9.1 in
Weight:7 kg
15.5 lb