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Hitachi HA-4700

Stereo Integrated Amplifier (1980-81)

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Hitachi HA-4700

Specifications

Power output: 50 watts per channel into 8Ω (stereo)

Frequency response: 10Hz to 70kHz

Total harmonic distortion: 0.02%

Damping factor: 40

Input sensitivity: 0.15mV (MC), 2.5mV (MM), 150mV (line)

Signal to noise ratio: 73dB (MC), 90dB (MM), 105dB (line)

Output: 150mV (line)

Semiconductors: 5 x IC, 67 x transistors, 71 x diodes

Dimensions: 435 x 83 x 326mm

Weight: 6.3kg

Year: 1980

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Reviewed May 05th, 2017 by jjcb1953

I have owned a nice example of this integrated for only 2 months but think it has a pretty look and a nice sound that is sweet but not drippy, especially if coupled with its matching tuner and powering a pair of Soundlab Angelus floorstanders. They are point source type with a full-range, dual concentric 7.5'' driver from SEAS and the little Hitachi doe a wonderful job producing sound free of the electronic glare so much in discussion by the golden-eared crowd. The HA-4700 is not the last word in working a low line of bass as they lack sufficient damping factor to really throttle the SEAS driver at volume. At moderate levels they have a lovely sound that is certainly well beyond the price that a good copy of these will cost you - though I've no doubt a serious upgrade of parts would improve that too.

Hitachi is a very underrated company in 2-channel audio, especially in North America, although being one of the giants of the Japanese electronic industry, they are capable of putting out hifi gear as good or better than many of their more well-know electronic peers in that country. I owned a hugely powerful and articulate Hitachi power amp during the first half of the 1970's as it was one of the few amps I found that could really make the super-inefficient IMF Monitor IV's transmission line speakers I owned work out hard enough to hit their full stride.

Like too many big companies, Hitachi has forgotten its early audio history so finding old catalogues, brochures and manual of those times is nearly impossible. Sad that such companies lack the foresight to hire an individual to manage such assests.

 

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