Hitachi SR-904
- Thread starter JohnInICT
- Start date
Kebby
Active Member
Seconded. That is a very nice looking receiver, and no doubt sounds fantastic! I am also a happy member of the Hitachi club, with a HA-610 amp and FT-920 tuner, that I got in exchange for a few records I didn't want anymore and some minor speaker repair work. Under rated indeed! 
illinoisteve
Super Member
I have the SR-904 and SR-504's littlest brother, the SR-304. I'm listening to it now actually, though often I have it stowed away as a back-up. A few years ago there was a stretch of months, though, when it was the center of my main system.
There don't seem to be a lot of people who know about this series of Hitachi receivers, but the posts I have found about them all suggest that they're KEEPERS!
There don't seem to be a lot of people who know about this series of Hitachi receivers, but the posts I have found about them all suggest that they're KEEPERS!
What is the "adapter" toggle for?
<<<<update>>>>>>>
I just found out what "Adapter" was for, Its a loop switch for an EQ or some other passive device. I didnt want to mess with the tape out buttons so I tried "Adapter" out to my EQ and back in, works great! I'm almost tempted to sell this as its far too nice for my dusty garage! Mines perfect 'cept for 2 tiny scratches on the top edge of the faceplate.
<<<<update>>>>>>>
I just found out what "Adapter" was for, Its a loop switch for an EQ or some other passive device. I didnt want to mess with the tape out buttons so I tried "Adapter" out to my EQ and back in, works great! I'm almost tempted to sell this as its far too nice for my dusty garage! Mines perfect 'cept for 2 tiny scratches on the top edge of the faceplate.
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New link? At lease this one worked for me. Mine just went silent while switching the tape source. Now I have no output on any source. Tried all tape monitor combos. Ouch!
PS>>> disregard, it only went into protection..it healed.
http://wegavision.pytalhost.com/Hitachi/HitachiSR-904s/
PS>>> disregard, it only went into protection..it healed.
http://wegavision.pytalhost.com/Hitachi/HitachiSR-904s/
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just dave
vintage rules!
Glad to hear it.I've got the SR-2004 and I love it. Rock on.
Cool, the " Blue light special"!
I may dive into mine and clean the speaker monitor toggle ( protection fault culprit?) caps and maybe replace the bias trimmer pots with sealed multi-turn units as it's in a somewhat dusty shelf environment now and dust kills the open pots precision.
I may dive into mine and clean the speaker monitor toggle ( protection fault culprit?) caps and maybe replace the bias trimmer pots with sealed multi-turn units as it's in a somewhat dusty shelf environment now and dust kills the open pots precision.
JB6789
New Member
Bought my first Hitachi SR-903 earlier last year for $140 and it needed some work. Did some of that work on my own then sent it in for a service check and adjustments (I do not own a signal generator and osc.). Came back working like a charm. The unit itself was near mint, not a scratch. I probably paid a premium for this unit considering it did require time and effort to bring it to life. However, it was mint visually and I did take the risk of buying remotely, so in-country transport may have been the culprit.
In the later part of last year, another showed up on a local listing and I snagged it for $110. I figured, if I can recap and update one, the second would be a breeze. As well, having all of the documentation on hand, I could focus on this design and not clutter my brain or challenge my limited expertise by trying to become a master of none. The second unit was really dirty, but fully functional. After an internal inspection and checks (DC offsets), an intense cleaning and DEOXIT (D5 or F5 applied, where applicable), this unit was sat. Visually, it is not as mint as the first with a slight nick to the bottom edge of the faceplate (2mm edge dent) but otherwise, after some TLC...an excellent result!
I wrapped both black-wood cases with a high quality vinyl wrap (gloss, burled walnut) and they look like cigar boxes, in terms of quality visuals. The wrap really turned those drab matt black cases into beautiful accents against the stunning ALU faceplate, knobs, levers.
In terms of sound, I have placed these units as my primary receivers for both the family room and home office. They sound and look terrific! Beefy power, too! More than enough for my needs. I have never pushed the limits on these beasts...not even close. In terms of sound, they have that vintage quality/musicality with very good technicality. At the end of the day, I've paired them to Marantz EQ20's...so a basic EQ is always on the table.
I'll be keeping a Yamaha CR-420 and a Nakamichi SR-2E for other apartments; both are way too nice to part with. Will probably sell a Pioneer LX-626 as the faceplate is a little faded and I do not have the time to revise it. Same for a Sanyo DCX6000K, which is visually immaculate but requires work (no right channel output).
To me, the Hitachi's are unsung heroes and I am VERY glad I was able to acquire them at reasonable prices. I suspect they will never achieve the hype of other brands (Marantz, Pioneer, Sansui) as they never had the market-share in their hay-day, so viable units are limited these days. No worries for me...I bought them to keep and for my own enjoyment; and to pass along to my kids some day.
In the later part of last year, another showed up on a local listing and I snagged it for $110. I figured, if I can recap and update one, the second would be a breeze. As well, having all of the documentation on hand, I could focus on this design and not clutter my brain or challenge my limited expertise by trying to become a master of none. The second unit was really dirty, but fully functional. After an internal inspection and checks (DC offsets), an intense cleaning and DEOXIT (D5 or F5 applied, where applicable), this unit was sat. Visually, it is not as mint as the first with a slight nick to the bottom edge of the faceplate (2mm edge dent) but otherwise, after some TLC...an excellent result!
I wrapped both black-wood cases with a high quality vinyl wrap (gloss, burled walnut) and they look like cigar boxes, in terms of quality visuals. The wrap really turned those drab matt black cases into beautiful accents against the stunning ALU faceplate, knobs, levers.
In terms of sound, I have placed these units as my primary receivers for both the family room and home office. They sound and look terrific! Beefy power, too! More than enough for my needs. I have never pushed the limits on these beasts...not even close. In terms of sound, they have that vintage quality/musicality with very good technicality. At the end of the day, I've paired them to Marantz EQ20's...so a basic EQ is always on the table.
I'll be keeping a Yamaha CR-420 and a Nakamichi SR-2E for other apartments; both are way too nice to part with. Will probably sell a Pioneer LX-626 as the faceplate is a little faded and I do not have the time to revise it. Same for a Sanyo DCX6000K, which is visually immaculate but requires work (no right channel output).
To me, the Hitachi's are unsung heroes and I am VERY glad I was able to acquire them at reasonable prices. I suspect they will never achieve the hype of other brands (Marantz, Pioneer, Sansui) as they never had the market-share in their hay-day, so viable units are limited these days. No worries for me...I bought them to keep and for my own enjoyment; and to pass along to my kids some day.
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ArthurPix
New Member
Țhe Hitachi 904 is officially rated at 75wpc RMS, but because it’s Class G, it can handle likes up to 125WPC. So in a previous era it would have been rated 125. It’s got more power than you’d probably ever need as long as you have speakers that can accommodate it — not hard. My Paradigm Paragon 2s could handle it easily, You have a gem.