harman kardon

Hi everyone, I just got my hands on a PM655 with a loose speaker selector knob. It slides off easily and has practically no grip, i.e. it spins freely and doesn't move the underlying mechanism at all. I assume it's because those two plastic protrusions, which lock into an indent inside the...

I am looking for a source to resurrect my Citation I. I purchased this preamp about 10 years ago at a local auction. (I kick myself still for allowing myself to be outbid for the matching Citation II.) The Citation I is complete but needs repair of its internals and refurbishment of its...

Hi everyone, I am considering selling my current integrated amplifier, a Rotel RA-985BX, and upgrading to something that fits my sonic preferences and speakers better. I have narrowed down my choices to two specific models available to me: the Harman Kardon HK 6650R and the Pioneer A-77X. My...

Good morning and hello! I’m new to AK and relatively new to the world of vintage audio. I got started in home theater equipment about a year or so ago and delved into vintage in the past half a year thanks to some Bose 301 IIIs given to me by a professor. I’ve done some simple repairs before...

I went to an Estate sale today and picked up a Harman Kardon Citation Twelve Power Amplifier on a whim for $40. I was unfamiliar with the model but it was in great shape cosmetically so I fugured for $40 I had not much to loose. When I got it home I put it on the DBT and there were no issues...

Hello everyone, I am a new friend here, even if I often follow your discussions, that's why I'm here to ask you for some help. I am willing to buy an amplifier for my Dual 1219 turntable. I would like something to keep the vintage vibe of my Dual, nice but not crazy expensive, and after reading...

I am looking for tube amp repair in the Northeast (although the location may be moot, as it made need to be shipped regardless). These are mid-60s amps by Dynaco (a stereo pre-amp) and Harman Kardon (A500) that work but need modest repair or rehab. No MacIntosh-type stuff, but good. I am near...

Harman Kardon Citation 22 - Remote Power On not working. Any ideas why remote on wouldn't work? I measure the trigger output from the mini jack cable and it reads 12v when on and 0v when off but using it on the Citation 22 doesn't trigger to turn off or on. It remains on even if a cable is...

I recently picked up a Harman Kardon A401 to use in a stereo console project I am working on. I have some background with soldering and repairing things if I have clear instruction but have not gone deep enough into stereo gear to know how to diagnose/ trace down trouble spots. I replaced the...

Hello everyone. Hope you are all alright. I need help choosing the following units I found for sale but cannot audition them as they’re all a while away from me. The choices I have will be paired with either a Boston Acoustics HD5 or Celestion 1 (no passive subwoofer) speakers. My studio...

Before I even begin, I already know what kinds of reactions my perfect day is going to receive: :yikes::crazy::wtf:, etc and that's okay. ;) My perfect day is 20° F/-6.7° C or colder, as low as neg 10/neg 23.3, 17% humidity or lower, sunny and very little to no wind. Jan 94 in NJ was when I saw...

What if songs that we all know and love from the 20th century were recorded in reference to the technology of today? Bluetooth Woman - Santana Smartphone Has Broken - Cat Stevens Virtual Me, Virtual You - ABBA BlackBerry - Black Sabbath I Only Have Eyes For My Phone - The Flamingos

Hey all, I’m looking for another HK receiver and found a 150+ for sale. However, the front plate has the tuner dial of the 900+. Is this a late production model of the 150 and they switched the tuner dial before switching over to making the 900+. Anything to look out for with these that will...

a question : what is normal temperature of this amplifier? It is known that they run warm but I have not found more specific information background: - a few weeks back I got hk 665vxi to my must have vintage collection. Unit I got was working but gave every now and then static noise at random...

A guide to servicing the DSP circuitry in Harman Kardon AVR series receivers

A training doc from HK on protection circuit in the AVR series of receivers

Gave away my old broken vintage piece to an old pal. Been using my H/K 3390, love it to death but there's a small hole in my heart that only a slab of finely sanded and oil wood can cover. It's probably as simple as gluing 4 pieces together, but then I have to look into vent holes, screw holes...

Hi. Maybe someone can help with the STM32F205ZGT6 microcontroller dump. Which is located on the CUP12620 chip in the Harman Kardon HK3770/230 amplifier. I would be very grateful. I can't find it. Thank you.

I’m working on restoring a Harman Kardon 330a amplifier that was blowing fuses due to multiple shorted transistors. Among other issues, one of the four CDC8002/9002 “flying saucer” transistors was blown. Following advice from an old thread on a different amplifier model, I replaced all four with...

I should have guessed this, but it hadn’t dawned on me to look for a matching tuner for the HK A-402 integrated amp. Now a photo showed up elsewhere… and they look awesome together.

I need help completing my setup in my dining room, fairly small (fits a 10-seater table). The only thing that i have right now is a Dual 1218 turntable w/ B&O SP12 stylus (that I picked up as junk and I have yet to actually repair). I've settled on the following choices for speakers and...

I have been shopping quite a bit lately. I noticed this Rotel 203A on marketplace. It had been on there for a longtime. I had never heard of the brand so I just kept looking. Weeks went by and this thing was still on there. I finally did some homework on this and read many reviews about how good...

I have a HK-825 on the bench that is working 100% except for the power LED. Per the manual, it is supposed to flash until the unit comes out of protection... about 8 seconds. The LED on this unit will flash once, and stay off until the unit comes out of protection, then is goes solid, as it...

We get a good number of threads here on AK with questions about Harman Kardon audio gear... and we have lots of people who chime in with their firsthand experience. I'm curious as to who all here has repaired or restored or recapped any Harman Kardon receivers, amps, equalizers, tape decks...

Hi, I have a Citation 22 I bought new in 1989, that I took apart to chase down a DC output issue. I'm thinking the DC output may be related to cracked solder joints in the pre-driver board with loose transistors, as when I moved that board or banged it, the DC output would increase or go away...