Free Shipping on All Orders 1-866-764-1801

Vist our Online Store
+ Reply to Thread
Results 1 to 28 of 28
  1. #1

    Member Sales Rating: (0)

    Join Date
    Mar 2013
    Posts
    18

    Default Amps with no mid control common?

    Was it common for amps around 1980 to be made without a mid control, just bass and treble?
    I am expecting a Kenwood KA-60 (1980-82) next week which does not have a mid control:Name:  ka-60front.jpg
Views: 376
Size:  64.9 KB

  2. #2

    Member Sales Rating: (8)

    Join Date
    Jan 2005
    Location
    Sunny South Florida
    Posts
    3,034

    Default

    thats cool-looking with the fingertip hole;)

  3. #3

    Member Sales Rating: (10)

    Join Date
    Jan 2003
    Location
    WA State
    Posts
    3,282

    Default

    Why 2 threads with the same question?

  4. #4

    Member Sales Rating: (0)

    Join Date
    Dec 2010
    Location
    Central NC
    Posts
    2,403

    Default

    Quote Originally Posted by joho1701 View Post
    Was it common for amps around 1980 to be made without a mid control, just bass and treble?
    I am expecting a Kenwood KA-60 (1980-82) next week which does not have a mid control:Attachment 82514
    Yeah, it was. IIRC Marantz was one of the few that included it on both integrated amps and receivers. Also had it on many of their pre amps. Both my 1070 and 3200 had mid range tone controls, as did my 1060.
    "Science is suppose to explain observations not dismiss them as impossible" - Norm on AA; 2.3TL's w/sonicaps/mills, polyswitches removed, Lg Solen inductors, RD-0198's, MW's dynamatted, Armaflex speaker gaskets, H-nuts, brass spikes, Cardas CCGR binding posts, upgraded IC Cable, Black Hole Damping Sheets (3" strips) installed on back wall behind MW's & Tweeters, interior of cabinets sealed, AI-1 interface with 1000VA transformer

  5. #5

    Member Sales Rating: (0)

    Join Date
    Mar 2013
    Posts
    18

    Default

    Quote Originally Posted by ken brydson View Post
    Why 2 threads with the same question?
    That was my mistake. I thought I had first posted my question in the wrong category

  6. #6

    Member Sales Rating: (1)

    Join Date
    Aug 2009
    Location
    central Illinois
    Posts
    3,200

    Default

    some of the yamaha pre-amps and intergrated amps had a mid range tone control in the 80's. Most better gear don't even have bass or treble anymore. I don't use them at all on my gear.

  7. #7

    Member Sales Rating: (2)

    Join Date
    Jun 2004
    Location
    New England
    Posts
    7,977

    Default

    Here's an R/S receiver from the late 1970s with both variable HF and LF turn-over frequencies and an adjustable midrange as well...



    The OP's probably looking for something more along the lines of this... :-)

    all the best,
    mrh

  8. #8

    Member Sales Rating: (1)

    Join Date
    Aug 2009
    Location
    central Illinois
    Posts
    3,200

    Default

    wonder if that Marantz could actually hit 300wpc/400wpc? To me it seem the older stuff had a lot of wishful spec's. That RS looks like it was made by pioneer.
    good stuff Mhardy

  9. #9

    Member Sales Rating: (2)

    Join Date
    Jun 2004
    Location
    New England
    Posts
    7,977

    Default

    Yes, it could meet the 1974 FTC standard (which was 300 wpc continuous at the rated TH distortion level, both channels driven, across the 20 to 20k spectrum after a 30 minute preconditioning at 1/3 of full rated power)! I doubt that very few of today's powerhouse amplifiers - at least the passively cooled models - would survive the preconditioning requirement of the standard without overheating and shutting down... but that's a topic for another thread :-)

    That particular Marantz was a beast and had some Achilles' heels in terms of failure-prone components. Cost a fortune then... and now. You can probably find one or two on eBAY at any given moment, but they may or may not be in good working order.

    The big prize winner in the receiver power sweepstakes back then was the Technics (Matsu****a/Panasonic brand for consumer hifi) SA-1000 at 330 wpc according to the FTC mandate. These were not as substantially built as the above-mentioned Marantz nor the other well-known big momma of the era, the Pioneer SX-1980. The other major massmarket brands also had 200-plus wpc receivers in those short-lived, halcyon days. The economy took a turn for the worse at the end of the 1970s, the college-age kids of the time (myself included) graduated and moved on to grad school, careers, and/or family-building; hifi hardware got "computerized' (digital displays, touch controls, graphic readouts)... and the 1970s power wars ended rather abruptly.

    all the best,
    mrh

  10. #10

    Member Sales Rating: (2)

    Join Date
    Jun 2004
    Location
    New England
    Posts
    7,977

    Default

    Back (roughly) on topic...

    The above-mentioned SA-1000 looks like it had defeatable bass and treble controls with multiple turnover frequencies (those two little knobs) although it is hard to tell for sure from my scan.

    Here's a nice late 1970s Yamaha integrated amp with defeatable/variable turnover bass and treble controls. This amp lacks the typicall variable loudness (essentially a variable midrange attenuator) control that most Yamaha amplifiers and receivers had back in those days.

    all the best,
    mrh

  11. #11

    Member Sales Rating: (8)

    Join Date
    May 2008
    Location
    At a comfortable distance.... gaining perspective
    Posts
    5,688
    Last edited by gdb; 03-07-2013 at 05:23 PM.

  12. #12

    Member Sales Rating: (0)

    Join Date
    Mar 2013
    Posts
    18

    Default

    Nice!

  13. #13

    Member Sales Rating: (0)

    Join Date
    Mar 2013
    Posts
    18

    Default

    Quote Originally Posted by pitdogg2 View Post
    s Most better gear don't even have bass or treble anymore. I don't use them at all on my gear.
    That's good to know. And I willd efinitely be keeping that in mind as I set up my system!

  14. #14

    Member Sales Rating: (8)

    Join Date
    May 2008
    Location
    At a comfortable distance.... gaining perspective
    Posts
    5,688

    Default

    (IMO)It's better to have the controls and use defeat most of the time, then, when you have a less than ideal recording, you have the option of tweeking it a little to make it more "listenable". (instead of being an anal, purist hardhead and just throwing it away ! )

  15. #15

    Member Sales Rating: (2)

    Join Date
    Jun 2004
    Location
    New England
    Posts
    7,977

    Default

    I dunno - my real hifi is a little short on adjustments and controls - and I use it to listen to... whatever I choose to listen to. Haven't thrown anything away in terms of recorded music since I started collecting it in the early 1970s AFAIK.

    Two controls on the passive preamp - stepped autoformer volume (input level) control and source selector. The pot on the front of the power amp is - literally - not hooked up, and the headphone amp in the DAC has been defeated (i.e., the headphone level control on its front panel is, at this point, just for looks).

    Last edited by mhardy6647; 03-07-2013 at 07:56 PM.
    all the best,
    mrh

  16. #16

    Member Sales Rating: (8)

    Join Date
    May 2008
    Location
    At a comfortable distance.... gaining perspective
    Posts
    5,688

    Default

    Alrighty then !

  17. #17

    Member Sales Rating: (0)

    Join Date
    Sep 2010
    Posts
    505

    Default

    That's absurd. All my amps have mind control.
    _______________________________________
    TV: 52" LED Sharp Aquos Quattron
    Fronts: Martin Logan Electromotions --- Center: Martin Logan Motion 8
    Front Heights: Polk RC65i --- Rears: Polk RC85i --- Sub: BIC America F12
    Tactile Transducers: Aura Pro Bass Shakers powered by Pyle Pro 2x15 Amplifier
    Onkyo TX-NR818 --- Emotiva XPA-3 --- Oppo BDP-103

  18. #18

    Member Sales Rating: (0)

    Join Date
    May 2006
    Location
    The Seasonally Frozen Wastelands
    Posts
    1,112

    Default

    Well, heck. If we're getting misty-eyed over old Japanese receivers, how about some that use a graphic equalizer instead of tone controls? Here's three from about 1978--80.

    JVC JR-S201, '401, and '501. 35, 85, and 120 watts into 8-ohms. Sorry, no '301 (60-watts), although it'd look the same as the 201 but with chrome buttons instead of black, and different meter faces. The '201 and '301 are built on a slightly smaller chassis than the '401 and '501.

    Last edited by Schurkey; 03-08-2013 at 10:00 AM.

  19. #19

    Member Sales Rating: (8)

    Join Date
    Jan 2005
    Location
    Sunny South Florida
    Posts
    3,034

    Default

    [QUOTE=mhardy6647;1891006]

    cool toys! that cart looks like a robot:)

  20. #20

    Member Sales Rating: (1)

    Join Date
    Oct 2008
    Location
    Descending toward the moon in the CLEM (Chinese Lunar Excursion Module), looking for Chang'e
    Posts
    11,456

    Default

    Quote Originally Posted by Schurkey View Post
    Well, heck. If we're getting misty-eyed over old Japanese receivers, how about some that use a graphic equalizer instead of tone controls? Here's three from about 1978--80.

    JVC JR-S201, '401, and '501. 35, 85, and 120 watts into 8-ohms. Sorry, no '301 (60-watts), although it'd look the same as the 201 but with chrome buttons instead of black, and different meter faces. The '201 and '301 are built on a slightly smaller chassis than the '401 and '501.

    I have a JR-S201 around here somewhere, awfully BIG and a LOT of space for just 35 watts x 2.

    Currently I'm running a Sansui 5000A on some Boston Acoustics A100s in the basement. Pretty good Tuner in the -Sui! Lot of BASS authority for 55 watts x 2 (unit is pretty heavy for its size though--almost 10 lbs heavier than the JVC but much smaller in size).


    cnh
    Attached Images  
    Onkyo TX-SR 805 System #1 HT AVR
    Office Two Channel: LSi-7s (Nakamichi CA-5, NAD 214, Pioneer BDP51fd)
    Vintage Polks: Polk Monitor 5As, Monitor 7Bs [HK 730], Monitor 10As [Marantz 2265], SDA-2Bs [Jolida JD-303, Jolida MV-MK4]
    Headphones: HD600, Q701, ATH-M50s etc. Bravo Audio Ocean amp., Onkyo P-304, Adcom GFA-555, Technics Direct Drive TT

  21. #21

    Member Sales Rating: (2)

    Join Date
    Jun 2004
    Location
    New England
    Posts
    7,977

    Default

    THe JVC components were sort of - idiosyncratic - in their aesthetics, but were actually quite good. I'll defer comment on the "SEA" ("Sound Effects Amplifier") graphic EQ feature, save to say "it was the '70s". Remember opera windows, platform shoes (for men) and leisure suits? :-)

    The better JVC turntables of that era were (and still are) very, very good.

    cnh, I am sure you know there was an update to the driver (IIRC) boards for the Sansui 5000A... does yours have those updated? If not, I think it's a time bomb of sorts :-O I have a 5000A from my favorite emporium; it works but I assume it hasn't been updated, so I don't use it (and, yes, I've been too lazy to open it up and check - for a decade or more).

    Last edited by mhardy6647; 03-08-2013 at 01:41 PM.
    all the best,
    mrh

  22. #22

    Member Sales Rating: (1)

    Join Date
    Oct 2008
    Location
    Descending toward the moon in the CLEM (Chinese Lunar Excursion Module), looking for Chang'e
    Posts
    11,456

    Default

    I was told that the 5000A was OK when I bought it. But I guess I should open her up and have a look. I'm going to be cleaning out and lubing the controls of a Realistic STA 2200, and my HK 730 this weekend, so maybe I should look into Sansui as well and see what is actually in there?

    I've always liked the old JVC stuff. And to be honest. Their older CDPs are almost indestructible. They just play and play and play, and they sound OK, too!

    cnh
    Onkyo TX-SR 805 System #1 HT AVR
    Office Two Channel: LSi-7s (Nakamichi CA-5, NAD 214, Pioneer BDP51fd)
    Vintage Polks: Polk Monitor 5As, Monitor 7Bs [HK 730], Monitor 10As [Marantz 2265], SDA-2Bs [Jolida JD-303, Jolida MV-MK4]
    Headphones: HD600, Q701, ATH-M50s etc. Bravo Audio Ocean amp., Onkyo P-304, Adcom GFA-555, Technics Direct Drive TT

  23. #23

    Member Sales Rating: (2)

    Join Date
    Jun 2004
    Location
    New England
    Posts
    7,977

    Default

    The driver (IIRC) boards are clearly labeled (I think) - it should be easy (again, I think) to ID whether the boards are original or upgrades. Heck, I should check mine this weekend :-)

    The info should be easy to find at AK...
    all the best,
    mrh

  24. #24

    Member Sales Rating: (0)

    Join Date
    Jan 2011
    Location
    fla
    Posts
    1,694

    Default

    I remember having that amp for a short while. Wow cant believe i can remember that far back! LOL i think the sliders got too noisey and i dumped it for something else just cant remember what.
    Main Rig:
    Krell KAV 250a
    McIntosh MC 2120 bi-amped
    Into JBL L123 drivers
    Rane external crossover.
    MIT exp 1 ic's
    Perreaux SA33 class A preamp
    AQ kingcobra ic's
    ADCOM GDA 700 DAC ( MODDED)
    YAMMY CDC-665
    Marantz 6100 tt w/pickering XV-15/625E cart.
    Monster HTS 3600 power conditioner
    POLK RTA-12C'S W/ RDO194 TWEETS, clarity ESA caps mills risistors (full mod)
    MIT exps2 speaker cable

  25. #25

    Member Sales Rating: (0)

    Join Date
    May 2006
    Location
    The Seasonally Frozen Wastelands
    Posts
    1,112

    Default

    Quote Originally Posted by soundfreak1 View Post
    I remember having that amp for a short while.
    That amp? WHICH amp?

  26. #26

    Member Sales Rating: (2)

    Join Date
    Jun 2004
    Location
    New England
    Posts
    7,977

    Default

    I am speculating that he was referring to one of the JVC receivers; note the mention of "sliders".

    Quote Originally Posted by soundfreak1 View Post
    I remember having that amp for a short while. Wow cant believe i can remember that far back! LOL i think the sliders got too noisey and i dumped it for something else just cant remember what.
    all the best,
    mrh

  27. #27

    Member Sales Rating: (0)

    Join Date
    May 2010
    Location
    Friendsville,Tn
    Posts
    302

    Default

    No doubt about it,that older gear is a whole lot sexier than anything built today! IMHO anyways.
    Main
    Parasound P5
    Parasound A21
    Cambridge Audio tuner
    Yaquin tube buffer (PearsAll)
    Rotel RCD1072
    Morrow Sp3
    Morrow Xlr
    Lsi15 w/Fortress mod.


    Bedroom
    HK3490
    Adcom 555
    Marantz 5003
    Monitor 70 II
    Signal cables

  28. #28

    Member Sales Rating: (2)

    Join Date
    Jun 2004
    Location
    New England
    Posts
    7,977

    Default

    Quote Originally Posted by ratster View Post
    No doubt about it,that older gear is a whole lot sexier than anything built today! IMHO anyways.
    I never said that...

    ;-)
    all the best,
    mrh

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

     

Similar Threads

  1. Need Help Are any new amps common ground?
    By vintagenut in forum Vintage Speakers
    Replies: 13
    Last Post: 05-23-2012, 05:52 PM
  2. Common Ground Amps
    By rubin in forum Electronics
    Replies: 21
    Last Post: 01-04-2010, 10:25 PM
  3. Need Help Why Common Ground Amps?
    By kn505 in forum Vintage Speakers
    Replies: 10
    Last Post: 08-14-2009, 03:34 PM
  4. Common ground amps
    By leroyjr1 in forum Electronics
    Replies: 11
    Last Post: 01-22-2009, 05:38 AM
  5. Common Ground Amps
    By riglehart in forum Vintage Speakers
    Replies: 25
    Last Post: 12-05-2006, 06:02 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts