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2270

  1. Yoast

    Marantz 2270 Crackle

    I have a hiss or crackle or static on both channels (but not at the same time) when using the marantz 2270. I switched the cables left and right channel and the static appeared on both channels. (not simultaneously) The amp was recapped and serviced just recently because of this but the...
    • Yoast
    • Thread
    • 2270 amplifer marantz marantz 2270
    • Replies: 13
    • Forum: Marantz Audio
  2. Yoast

    Adding a Center Speaker to a Marantz 2270. What options do I have?

    Hello everyone, My situation is as follows: Setup: Wiim Amp (in use as streamer) with ARC connected to TCL with apple tv. > DAC topping E30 > Marantz 2270 > Duevel Planets omnidirectional floor standing speakers. I have a rectangular shaped listening / Movie room which is around 300 Sq/ft...
  3. zastin17

    Marantz 4140. Hard Clipping/Chirping at near max output, but only in 2x Channel bridge mode.

    I have had this wonderful old amplfiier for around 8 years. I got it completely factory, and somebody shorted out the lamp circuit. Easy fix luckily!! Worked great after clearing the short. The entire time I've owned the amp, it has had this strange behavior when I set it to 4x channel bridge...
    • zastin17
    • Thread
    • 2 channel 2270 4 channel 4140 amplifier bridge clipping marantz
    • Replies: 0
    • Forum: Marantz Audio
  4. Dave Sanders

    Marantz 2270 Service Manual with Bulletins

    Found this SM for the 2270 which has better detail especially in the images and also has Service Bulletns.
  5. Tom AE5CH

    Howdy from Tulsa Tom

    Ive been reading AK for years and its time to sign in. I may have had an old account but Ive changed emails often due to hackings. Im back doing some maintenance on Marantz stuff. So many genious people in AK. Right now rebuilding my 2270 P700 board. Im taking copious notes as new info...
    • Tom AE5CH
    • Thread
    • 2240b 2270 5220 6200 fender tele fender twin reverb jbl 4311 marantz p bass teac 3340s
    • Replies: 24
    • Forum: Introductions
  6. DomPal

    Imbalance output

    Hello good people! I recently installed new diodes, caps transistors, thermistors.. on my Marantz 2270. Now my mistake is that I didn’t recird the output before I started so there’s no way of knowing i mf the problem was present before. I started on the Right channel board first and I checked...
    • DomPal
    • Thread
    • 2270 amp imbalance marantz marantz 2270 pre amp
    • Replies: 11
    • Forum: Marantz Audio
  7. DomPal

    What is the gain of a Marantz 2270

    Does anyone know the gain of a 2270 with calculations? I can’t find it on the spec sheet. I try to calculate it based on the rated output at 8 ohm but I get Gain = 100. That can’t be right, right?
  8. DomPal

    Where to connect the sub on a Marantz 2270

    Hello, Is it right that you connect the sub on the remote speaker termials on a Maratnz 2270 and the stereo speakers on the main terminals? So when you are listening to music you should have both main and remote speakers switches turned on. Is this bad for the amplifier or is a 2270 made for...
    • DomPal
    • Thread
    • 2270 main marantz marantz 2270 remote speaker speaker terminal
    • Replies: 14
    • Forum: Marantz Audio
  9. MorrisonAgen

    No radio signal at all from Marantz 2270

    Hey all, I recently picked up a Marantz 2270 that was in excellent, unrestored condition. I have completed a full restore of the unit, but I am getting absolutely ZERO from any of the radio functions on it. When I turn the volume all the way up, I get a very light pulsing sound, but no static...
  10. DomPal

    What is this capacitor for? I can't see it in the schematics

    It is connected between J761 and J758 on the amp board. Do you guys have any spec for this one and alternative replacement if needed? I think it says .01uF KCK
  11. DomPal

    My amp board wiring is not exactly like the schematics

    I have both amp boards out and was just checking the resistor values and I noticed something. If you look at the pics the resistor R785 (yellow arrow) is a short when it is suppose to be a 3.9ohm resistor. Is this normal or should i put a resistor with the right value? Why is it like this?
    • DomPal
    • Thread
    • 2270 marantz marantz 2270 resistors
    • Replies: 3
    • Forum: Marantz Audio
  12. ianstaub

    My Marantz 2270 doesn't sound any better than my modern Denon AVR-X1700H. What am I missing?

    Hi all, hoping for some opinions. TL;DR: I can't tell much of a difference between my un-serviced Marantz 2270 and Denon AVR-X1700H in A/B tests. What am I missing? Background: Since this summer I've been happily listening to music on my relatively new Denon AVR-X1700H feeding Klipsch Heresy...
  13. DomPal

    Marantz 2270 - Sound at start but then protection relay kicks in after a while.

    Hello folks, I have a Marantz 2270 that I bought from ebay. When I first got it and connected everything, plugged it in the the power socket, it sounded great and everything worked. Then after maybe 2 hours of listening I heard a click from the relay then there was no sound. The music came back...
    • DomPal
    • Thread
    • 2270 fine at start marantz marantz 2270 music cuts out no music relay relay click
    • Replies: 17
    • Forum: Marantz Audio
  14. ocdecio

    2270 - Flickering stereo due to noise

    This is another case of FM stereo on a 2270 that I've not seen before. From what I could measure, the noise detection circuit is preventing stereo from holding - it flickers once in a while and it follows the noise signal at J555. I am wondering if a noisy transistor in the IF section could...
  15. davstev

    Power switch Marantz 2270: my attempt

    I know that replacement switches for Marantz's can be ordered for not much money, and this is my backup plan. I recently acquired a 2270 with the common faulty switch problem and am replacing it. I went to a local electrical supply store that has a good selection of switches and located a...
    • davstev
    • Thread
    • 2270 marantz marantz 2270 power switch power switch modification
    • Replies: 1
    • Forum: Marantz Audio
  16. dinkylink

    Help !Marantz 2270 loud hum popping sound

    Hello guys, thank you all for reading this , I have a Marantz 2270 that just came out of storage , it used to work beautiful but now as soon as you turn on the speaker relay disengages after a few seconds and get a loud hum popping noise for a second , relay kicks into protection disengages...
  17. Y

    2270 Restoration

    Bringing back from the dead a 2270. Bought it off CL in horrible shape, was mainly used as home for mice - I found all their food stashes... They loved P-800 for their chips hideaway. One of the smaller issues is the broken selector switch. I would like to attempt the surgical approach as...
  18. mmsean

    Marantz 2270 Faceplate Creators?

    Anyone know anyone who is making silver or possibly black etched faceplates anymore? I know I can order one from Germany on the bay but I'd rather buy from a member here. Would prefer a silver face too.
  19. disfunktor

    Upgrade from PM 7001 KI to 2275?

    I always loved the looks, and sound reviews of 2270, 2275, 2285 and 2325s. I heard (and loved very much) the 2285 in action, but only briefly and in a relatively unfamiliar setup (AR9 speakers) and an unfamiliar ambient (a rather big living room dedicated to hifi stereo), so I cannot really put...
  20. mstewart

    Marantz 2270 Selector Knob Partially Broken

    Up until now all of my posts have been in the Pioneer forum. The other day I sold one of my receivers and came across a 2270. Since I've never owned a Marantz I was interested and ended up buying it. I may be having buyers remorse I haven't decided quite yet. I have been having a hard time...
  21. T

    Marantz 2270 Opinions

    Hey everyone, There is a guy selling a 2270 for $500 locally. Since I've gotten into audio, I've wanted to get a Marantz because they are beautiful and I've listened to them and love their low end. I don't know anything about the reciever, I am assuming it is in working unrestored condition, I...
  22. R Krawczyk

    Marantz 2270 P750 Replica Board

    Hi All! This is a followup post from a few years ago regarding the work that AK member ton4eff did in producing a replica board for the Marantz 2245/2270 P750 amp boards. You can reference the original post here...
    • R Krawczyk
    • Thread
    • 2245/2270 replica amp board 2270 marantz marantz 2270 p750 p750 p750 replica
    • Replies: 37
    • Forum: Marantz Audio
  23. S

    60Hz triangle wave hum Marantz 2270

    I just acquired a 2270, and did a full re-cap. There's a 60Hz triangle wave hum I can measure with a scope (which may or may not have been there before) that gets louder with increased volume, independent of source selection. I can also still here it when I disconnect the pre-amp, but it no...
  24. P

    New system info

    Hello all, New to this format.. I’m just starting to rebuild a nice system... I have the opportunity to pair a Marantz 2270 with a nice pair of HD 880 speakers.. is this a good match ?
  25. goldswimmerb

    Another cheap Marantz 2270 (this ones gonna be fun)

    Hey guys, so figured I'd document my fun that I'm going to have with my recent acquisition of a "for parts" 2270 from ye olde evil bay site. According to the seller he started recapping it, then ran out of time to finish it, although my bet is that he messed up somewhere and gave up. Apparently...
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