Tube Integrated Amplifier

Harman Kardon A224 integrated tube amplifier, refurbed to original, nice amp

Harman Kardon A224 integrated tube amplifier, refurbed to original, nice amp
Harman Kardon A224 integrated tube amplifier, refurbed to original, nice amp
Harman Kardon A224 integrated tube amplifier, refurbed to original, nice amp
Harman Kardon A224 integrated tube amplifier, refurbed to original, nice amp
Harman Kardon A224 integrated tube amplifier, refurbed to original, nice amp
Harman Kardon A224 integrated tube amplifier, refurbed to original, nice amp
Harman Kardon A224 integrated tube amplifier, refurbed to original, nice amp
Harman Kardon A224 integrated tube amplifier, refurbed to original, nice amp
Harman Kardon A224 integrated tube amplifier, refurbed to original, nice amp
Harman Kardon A224 integrated tube amplifier, refurbed to original, nice amp
Harman Kardon A224 integrated tube amplifier, refurbed to original, nice amp

Harman Kardon A224 integrated tube amplifier, refurbed to original, nice amp   Harman Kardon A224 integrated tube amplifier, refurbed to original, nice amp
This is a time capsule Harman Kardon refurbished tube type A224 stereo integrated amplifier, called the Trio, serial number 2904743. The A224 is one of the very nicest EL84 tube amps of that era (about 1959), 12 WPC, nice features, good performing and good looking compact amp. Dont be too concerned about the 12WPC output, the A224 has a surprising level of volume and tone. Check my other listed HK tube units. I had an HK A300 amp in college in the 1960's and always loved it's sound.

I've learned all that I can about these amps and have been successful in their restoration. I never put power to these amps without first replacing the electrolytic and paper/ plastic coupling capacitors. It is strongly recommended (Google recapping radios) that the electrolytic and paper or molded (original disc mica type are OK) coupling capacitors be replaced in old tube units. Some people say it's OK just to'reform' the power supply caps.

(bring them up very slowly over a couple of days on a variac). While this is a much simpler and less costly alternative, I'm not convinced that it is a good as replacing dried out caps with new current fresh stock.

See the last two pictures,'before' and'after' recapping. After restoration I also verified the B+ voltages and critical components are to specification. This restoration does not modify the wonderful'tube sound' --no real modifications, but rather put back the way the HK engineers designed it, only make the unit safer and more reliable.

In addition to replacing the electrolytic and paper/molded coupling capacitors, I have tested all the tubes on my B&K 707 tube testerand replaced any that were marginal. I also have cleaned the tubes, tube sockets, controls and switches (Deoxit D5 contact cleaner for the tube sockets and switches, F5 Fader Lube for the potentiometers). The four output tubes are a performance matched set of EL84's. The last two pictures show the before and after of the chassis restoration.

I have verified all the operations. The controls and switches function as designed.

All the inputs are operational. I have run this unit many hours without any issues after the refurbishing. This amp appearance is very good, the faceplate is nice , has some very minor mars and scratches, the knobs are excellent, all the lettering is legible and distinct--see the pictures. All A224's originally came with a tube cover.

This A224 was installed in a custom console and the tube cover lost to time. There are four small holes on the corner of the faceplate that had screws fastening it to the console. I used appropriate sized screws to fill the holes, see pics. The amp size is a nice size-compact, about the size of a turntable. It's hard to capture the copper color of the amp, the pictures in'daylight' are the closest for accuracy. The A224, as a tube unit has a sound unlike solid state units. These were (and are) highly regarded amplifiers, and have that highly desired tube sound. Interesting that HK is one of the very few hi-fi companies of the 1960's to still be in business.

As a stereo integrated amplifier, there are inputs for lo level (magnetic) phono or tape head, hi level (ceramic) phono, tuner and auxiliary inputs. The controls are: Source Selector, Mode, Loudness (Volume), Bass, Treble (with power switch), Balance, and Blend. Switches are provided for rumble filter, contour, and speaker selection. The A 224 has an interesting circuit design.

It can operate in two different modes, first as a 12 watt/channel stereo amplifier, or as a stereo preamp and mono 24 watt power amplifier. There is a LH preamp out to feed a second power amplifier for this mode. In stereo mode it is configured to drive two sets of speakers. Great for speaker A/B comparison.

IMHF music output power12 watts per channel stereo, or 24 watts monothis was back when power ratings meant somethingplenty of power for efficient speakersbut it won't drive you out of the room. For speakers, folks like all the old Klipschs, and many of the shelf sized speakers match well with the A224. Output impedance8, 16 and 32 ohm, Speaker set A or Speaker Set B. Stereo inputslow levelRIAA (phono) and NARTB (tape head) equilizations.

Stereo inputshigh level Aux, ceramic phono, tuner this is suitable input for tuners, CD decks, most cell phones, MP3 players. When not listening to vinyl, I like my ECHO DOT as an input. Stereo tape outputsto feed a tape recorder or second amp.

LH preamp out--to feed a second power amplifier. Tube compliment--10 tubes, all are desirable types. This is not your son's amplifier. This is a tube unit, and as such, has voltages inside the chassis that can be lethal, 350+ volts. Also, it has tubes and a power transformer that gets hot. Although it is rated for 100% duty cycle (you can listen to it indefinitely), when you are done listening, best to turn it off. Can be a slippery slope. So, if you are into tubes, or just starting, here is an amplifier that is restored back to the original design specifications. As with essentially all vintage electronics, there is no ongoing guarantee.

If there is an issue, I will work with you, check my feedback. For international buyers this A300 operates only on 115VAC, if your grid is 230VAC, you will need a stepdown transformer. If your country is not listed, contact me, maybe we can work something out.

Harmon Kardon A300 Refurbished Tube Amplifier (#230229344793) I cannot explain how wonderful this amp makes my music sound!!! Harmon Kardon A300 Recapped Tube Amplifier (#330277726387) Impressive! Packed like a true engineer! Got me, the amp flew me.

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Harman Kardon refurbed A230 stereo tube amplifier EL84 (#330539388127) Outstanding. Vinyl can now be played in perfect mode. Harman Kardon refurbed A30K A300 tube amplifier 7408's. Harman Kardon refurbed A300 tube amplifier 7408's, 6V6 (#230624946073) This is one incredible sounding amp! Harman Kardon A300 (A30K) refurbed to orig.

Harman Kardon A300 refurbed to original, integrated tube amplifier 7408 tubes (#330658656112) Excellent Top notch Ebayer! A++++++ ^^ (Note: Sent to Hong Kong). Harman Kardon refurbed A224 integrated stereo tube amplifier EL84/6BQ5 beauty!

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Great guy and excellent working unit. Everything he said it was. Harman Kardon A50K Integrated Tube Amplifier, Refurbed to orig. Harman Kardon refurbed A220 integrated stereo tube amplifier 6V6 outputs. Harman Kardon A30K (A300) integrated tube amplifier, refurbed to orig. Harman Kardon A300 integrated tube amplifier, refurbed to original, nice unit (#330896129005). I have never received anything that was packed this good. Harman Kardon A300 refurbed integrated tube amplifier, K40Y-9 PIO caps, nice amp (#330901386193). Packed very good, sounds great and works like a champ, my first tube amp. Harman Kardon refurbed A224 integrated stereo tube amplifier EL84/6BQ5 beauty (#330901581618). Harman Kardon A300 refurbed integrated tube amplifier, nice amp. A+++++ everything was as described phenomenal customer service. Harman Kardon refurbed A230, 15WPC, EL84/6BQ5 integrated stereo tube amplifier (#230991580545). Harman Kardon A30K (A300) refurbed integrated tube amplifier, 7408 (6V6), nice (#231013537159). Just as described, very good communication, Recommended! Harman Kardon A500 integrated tube amplifier, refurbed to original 25 WPC, nice! Extremely Satisfied Exactly as described.

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Note: Sent to the Russian Federation. Harman Kardon A300 refurbed integrated tube amplifier, K40-9 PIO caps, beauty! Couldn't have been a better experiance. Harman Kardon refurbed tube A10 amp & FA10 receiver pair for stereo, 6BQ5 / EL84 (#231150623416). Harman Kardon A224 integrated stereo tube amplifier, refurbed nice vintage amp (#231159509912).

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Harman Kardon A500 integrated tube amplifier, refurbed to original, 25 WPC (#231831027613). Harman Kardon A500 integrated tube amplifier, refurbed, 25 WPC, beautiful!

Harman Kardon A50K A500 integrated tube amplifier, refurbed, 25 WPC, beautiful! (#331790711087) Fantastic item as described. Quick to arrive and info included as directed. THQ Note: Sent to England. Harman Kardon A300 integrated tube amplifier, refurbed to original, 15 WPC, nice (#231878915940). Most honest, knowledgable & trustworthy amp salesman in USA. Harman Kardon A224 refurbed stereo integrated tube amplifier, 12WPC, EL84/12AX7 (#331834352822).

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Harman Kardon FA3000X integrated tube receiver, has HK A300 amplifer section (#332117309696) Tom is certainly one of the most thorough and professional I've ever come across. Harman Kardon refurbed A230 stereo tube integrated amplifier, EL84, 15 WPC, nice (#332134739752) great ebayer, good packing. Harman Kardon A50K (A500) integrated tube amplifier, refurbed to original 25WPC (#232255692922) Crrachgo!

Note: sent to Russia, translation; Thank you! Harman Kardon A50K (A500) integrated tube amplifier, refurbed to original, 25WPC (#232296700982). Great Amp and very helpful after the sale!

Harman Kardon A50K (A500) integrated tube amplifier, refurbed to original, 25WPC (#232362784954). Harman Kardon A300 integrated tube amplifier, refurbed to original, PIO's, 15WPC (#232440204010). Having a few issues and Tom is being over-the-top helpful. Harman Kardon refurbed A230 stereo tube int egrated amplifier, 6BQ5/EL84, 15 WPC (#232459578678). Wonderful guy to work with!! Harman Kardon A300 integrated tube amplifier, refurbed to original, PIO's, 15WPC (#232558496376). The best, stands behind his sales. Honest and excellent on all fronts.

Harman Kardon refurbed A230 stereo tube integrated amplifier, 6BQ5/EL84, 15 WPC (#232530525588). Very fare ebayer, great communicator. Harman Kardon A300 integrated tube amplifier, refurbed to original, 6V6, 15WPC (#332487693158). Harman Kardon A500 integrated tube amplifier, refurbed to original, 25WPC (#332487614963). Harman Kardon refurbed A230 stereo tube integrated amplifier, 6BQ5/EL84, 15 WPC (#332537019443) Item is as described.

Great item, well packaged and super communication. Harman Kardon refurbed A220 Lute stereo tube integrated amplifier, 6V6, nice amp (#232799012341) This was BETTER than new & camaroguy can't do enough for U.

Harman Kardon A500 integrated tube amplifier, refurbed to original, 25WPC (#332661769919) Awesome product. Unit was super well packed and clean as a whistle.

Harman Kardon A30K (A300) integrated tube amplifier, refurbed to original, 15WPC (#332977672035) Best communication and the packaging was thoughtful and awesome. Harman Kardon A30K (A300) integrated tube amplifier, refurbed to original, 15WPC (#333051234508) Great Amp. Harman Kardon A230 integrated tube amplifier, refurbed to original, 15WPC, nice (#333150676727) Excellent. Harman Kardon A50K (A500) integrated tube amplifier, refurbed to original, 25WPC (#233241670239) great working condition.

Harman Kardon A500 integrated tube amplifier, refurbed to original, 25WPC, nice (#333357154652) The unit was perfect. Tom is the best and goes out of his way. Harman Kardon A300 integrated tube amplifier, refurbed to original, 15WPC, nice (#333383674483) Everything was wonderful. Great customer service and a magically sounding amp. Harman Kardon refurbed A224 stereo tube integrated amplifier, 6BQ5/EL84, 12 WPC (#233442710884) VERY NICE PACKAGING! Harman Kardon A300 integrated tube amplifier, refurbed to original, 15WPC (#233450559834) Had an issue.

Prompt, great service & assistance. Harman Kardon A300 integrated tube amplifier, refurbed to original, 15WPC nice (#233476894120) Tom has done a great job of restoring this amp. Harman Kardon A224 integrated tube amplifier, refurbed to original, nice amp (# 233668441789) Amazing care and diligence.

The item "Harman Kardon A224 integrated tube amplifier, refurbed to original, nice amp" is in sale since Saturday, August 22, 2020. This item is in the category "Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps". The seller is "camaroguy62" and is located in Fenton, Michigan. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Chile, Colombia, Costa rica, Panama, Trinidad and tobago, Guatemala, Honduras, Jamaica, Antigua and barbuda, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Saint lucia, Montserrat, Turks and caicos islands, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Ecuador, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Peru, Pakistan, Paraguay, Reunion, Viet nam, Uruguay.

  • Model: A224
  • Modified Item: No
  • Country/Region of Manufacture: United States
  • Custom Bundle: No
  • Country of Manufacture: United States
  • Type: Integrated Amplifier
  • Brand: Harman Kardon


Harman Kardon A224 integrated tube amplifier, refurbed to original, nice amp   Harman Kardon A224 integrated tube amplifier, refurbed to original, nice amp