REVIEW: Harmonious Audio MPA-1 mkII MC Head Amp

doctor fuse

Super Member
I recently received a Harmonious Audio MPA-1 mkII MC Head Amp, in the mail. Made in my neighbouring US of A. Not the bargain up here in Canuckistan, compared to domestic American customers, as the exchange rate is brutal - and I had to pay $14 customs duty on top of shipping. But for under $135 CAD ($89 in the US), I am pleasantly surprised.

Harmonious Audio MC Head Amp 2.JPG



A butt-ugly chunk of cheap-looking aluminum, with garish red plastic buttons that look like they are scrounged from a dollar store child’s toy, this unit does not a good first impression make (and this is in spite of the fact that the gold RCA plugs are decent quality). Add to that, my initial attempt to set it up with a defective RCA cable (HUMMMM!!!), and I was ready to send it back immediately. Well, I was mostly ready to send it back because soon after I purchased this head amp on E[gads!]bay, I found a Benz Micro Lukaschek PP-1 T9 MC phono stage at such a low price, I had to order that. When it gets here in about a week, I will compare it to this head amp (through the phono stage of the Rotel RX-855; I will try it through the phono stage of the venerable NAD 3020, and the lowly Realistic 42-2109 later, when I compare it against the Benz). 



The system is: Linn ASAK, Thorens TD-160 mkI, Harmonious Audio head amp, Rotel RX-855 phono stage (MM), PS Audio 6.1 preamplifier in both active and passive modes, and bi-amped through a Nikko Alpha II for lows and an old Electrohome SE tube amp for highs, to Tannoy 609 dual concentric speakers.



The first few hours seemed to have a lot of surface noise and pops. This mellowed after the first 6 or so hours (burn in is real!), and now surface noise is not particularly present, but not particularly hidden, either (the MC head amp in the Rotel receiver seemed to underplay surface noise a bit better).



But compared to both the Rotel phono stage and an old Project Phonobox S I was using prior, this head amp is QUIET. The engineer at Harmonious Audio who decided to bypass a power transformer by using two 9 volt batteries, made a very good decision. I am really curious how the Benz will compare, in terms of thermal noise and other electronic hisses.



After listening for two days, the music sounds very good. The Tannoys are not the best speakers for imaging, but they are doing an adequate job now. And they are singing! I keep turning the volume up. Having said that, the very high end is slightly grainy, and strident. I’m not sure if that is the innate nature of these Tannoy aluminum horn-loaded tweeters, but I am hoping the Benz will exhibit less of this character, and bring out more of the Electrohome’s sweet mellow tubey treble.



The bass is nice and deep, but my system is not particularly “fast” or “controlled” in this department (the Nikko’s damping factor is only 80, so if you have a modern amp with a ridiculous DF, like 1000, this may not be an issue for you). Instrument separation is good, and difference of tonal colours between them is also fairly good. I love the loud 20th century classics, so I have been listening to Stravinsky Conducts Rite of Spring (Columbia), Previn and the London Symphony on Shostakovich’s monumental 8th Symphony (Angel), Perlman, Previn and the LSO on Bartok’s 2nd Violin Concerto (Angel) Bernstein conducting the New York Phil, in Bartok’s Music for Strings, Percussion and Celesta, the Concerto for Two Pianos, Percussion and Orchestra (Columbia), and Reiner’s classic recording with Chicago of Bartok’s Concerto for Orchestra (RCA). Many glorious moments of almost-real orchestral sounds!

 And I have never heard the Tannoys have such a wide and TALL soundstage. Good stuff!

Harmonious Audio MC Head Amp.JPG

For the price, and ease of use, and quietness, and decency of performance, I would recommend this inexpensive, ugly/shiny little box, to those curious about tasting moving coil magic,without breaking the bank.
 
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I just found this thread and wonder whether you have any additional thoughts about this SUT after having used it for a while now? It looks like a tremendous value, something I'm a huge fan of. Thanks in advance.



I recently received a Harmonious Audio MPA-1 mkII MC Head Amp, in the mail. Made in my neighbouring US of A. Not the bargain up here in Canuckistan, compared to domestic American customers, as the exchange rate is brutal - and I had to pay $14 customs duty on top of shipping. But for under $135 CAD ($89 in the US), I am pleasantly surprised.

View attachment 1023378



A butt-ugly chunk of cheap-looking aluminum, with garish red plastic buttons that look like they are scrounged from a dollar store child’s toy, this unit does not a good first impression make (and this is in spite of the fact that the gold RCA plugs are decent quality). Add to that, my initial attempt to set it up with a defective RCA cable (HUMMMM!!!), and I was ready to send it back immediately. Well, I was mostly ready to send it back because soon after I purchased this head amp on E[gads!]bay, I found a Benz Micro Lukaschek PP-1 T9 MC phono stage at such a low price, I had to order that. When it gets here in about a week, I will compare it to this head amp (through the phono stage of the Rotel RX-855; I will try it through the phono stage of the venerable NAD 3020, and the lowly Realistic 42-2109 later, when I compare it against the Benz). 



The system is: Linn ASAK, Thorens TD-160 mkI, Harmonious Audio head amp, Rotel RX-855 phono stage (MM), PS Audio 6.1 preamplifier in both active and passive modes, and bi-amped through a Nikko Alpha II for lows and an old Electrohome SE tube amp for highs, to Tannoy 609 dual concentric speakers.



The first few hours seemed to have a lot of surface noise and pops. This mellowed after the first 6 or so hours (burn in is real!), and now surface noise is not particularly present, but not particularly hidden, either (the MC head amp in the Rotel receiver seemed to underplay surface noise a bit better).



But compared to both the Rotel phono stage and an old Project Phonobox S I was using prior, this head amp is QUIET. The engineer at Harmonious Audio who decided to bypass a power transformer by using two 9 volt batteries, made a very good decision. I am really curious how the Benz will compare, in terms of thermal noise and other electronic hisses.



After listening for two days, the music sounds very good. The Tannoys are not the best speakers for imaging, but they are doing an adequate job now. And they are singing! I keep turning the volume up. Having said that, the very high end is slightly grainy, and strident. I’m not sure if that is the innate nature of these Tannoy aluminum horn-loaded tweeters, but I am hoping the Benz will exhibit less of this character, and bring out more of the Electrohome’s sweet mellow tubey treble.



The bass is nice and deep, but my system is not particularly “fast” or “controlled” in this department (the Nikko’s damping factor is only 80, so if you have a modern amp with a ridiculous DF, like 1000, this may not be an issue for you). Instrument separation is good, and difference of tonal colours between them is also fairly good. I love the loud 20th century classics, so I have been listening to Stravinsky Conducts Rite of Spring (Columbia), Previn and the London Symphony on Shostakovich’s monumental 8th Symphony (Angel), Perlman, Previn and the LSO on Bartok’s 2nd Violin Concerto (Angel) Bernstein conducting the New York Phil, in Bartok’s Music for Strings, Percussion and Celesta, the Concerto for Two Pianos, Percussion and Orchestra (Columbia), and Reiner’s classic recording with Chicago of Bartok’s Concerto for Orchestra (RCA). Many glorious moments of almost-real orchestral sounds!

 And I have never heard the Tannoys have such a wide and TALL soundstage. Good stuff!

View attachment 1023377

For the price, and ease of use, and quietness, and decency of performance, I would recommend this inexpensive, ugly/shiny little box, to those curious about tasting moving coil magic,without breaking the bank.
 
Update:
The Harmonious Audio unit sits unused, since I have received the Benz-Micro MC preamp. This should not be a surprise, given the huge price difference ($100 CAD for a new HA head amp, versus $750 for a used Benz).

I did try it once more, after receiving the Benz. Compared side by side, it is not as refined as the Benz, with grainier treble and less defined bass. But still a good value for money - much better than the MC sections of the Phonobox S or the Rotel RX-855's MC head amp.

I might try and sell it on the Steve Hoffman audio site (not a subscriber here, so no access to Bartertown).
 
I have had a MPA-1a MK-ii for a while. I also have had a Denon HA-500 and a Yamaha HA-1. I have done comparison among the three head amps over and over. Here is my 2 cents worth.

The Denon is better than the Yamaha and is a very clean sounding head amp. For many years I really loved the HA-500. The Yamaha HA-1 is no competition in my opinion. I repeatedly compared the MPA-1a MK-ii with the Denon through many many listening sessions. I seem to feel a difference but honestly and surprisingly I can not tell exactly what the difference is. Both the MPA and the Denon are very transparent sounding head amps. Amp transparency is critical to my sweet sounding Magnetpan speakers. The Yamaha HA-1 unfortunately makes the sound a little boring to me. It is a very nice looking head amp but it is a little disappointing that it takes the sweetness off the music that I otherwise really enjoy. The Denon HA-500 is one head amp that really pleased me in preserving the sweetness of many violin, oboe, trumpet. cello, bassoon, clarinet, guitar performances. The MPA-1a MK-ii has been a surprise to me despite it is so cheap yet it compares so well with the HA-500.

The MPA-1a MK-ii is more dynamic than the HA-500. I think this is attributed by its deeper bass and very clean treble. It gives my M&K sub deeper drive than HA-500 does. Not a huge difference but for music with stronger bass you can feel its presence. It is also quieter than the HA-500. The HA-500 is a quiet head amp but the MPA is dead quiet when you turn up the volume. But the MPA is obviously not a fancy looking head amp. Its price is a good match of its chassis build. I actually like the way it is built for being cheap. I am glad that if my HA-500 quits I have a low cost substitute that matches the level of performance of the HA-500.

As far as using the two 9 volt batteries, the batteries do last more than 6 months. I replaced them just because I like fresh ones in the equipment. What I do not like about the MPA is it takes 45 seconds to power up. I guess it is not a bad idea to allow every component of the audio system to stabilize for a minute or so before dropping the needle anyway. The bypass switch on the other hand is very handy. I can unscrew my MC cartridge and screw in a MM then switch it and there it goes.

I am not sure there is any big name audio gear manufacturer that is still producing high quality had amps these days. I think I am pretty happy for a collection of a $89 MPA MC head amp.
 
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