11 February, 2012

Review: Kondo Ongaku + KSL-M7 System Part III

Kondo M7 in company with JC Verdier, Leben and Brooks; Ongaku in the background; click to enlarge.

Review: My Kondo System Part III
Kondo Ongaku + M7 System Part III - Digital Playback
Review: Sony CDP-R1/DAS-R1
Review: Audio Note DAC-2

Review: Genesis Digital Lens
Review: Gotham 10070 Coaxial Digital Cable

(Extensively revised Feb 16, 2012)

Editor's Note:
I'd like to refer you to a six-year old discussion thread dedicated to Kondo in the most well-known and worthwhile Hong Kong hifi forum called review33; the thread is humorously named AudioNote Ongaku - I'm in pain!, you get the idea! Although the webpage is in Chinese, most write in English, and there are useful information on Kondo buried there. I don't write much there but I do know (of) some of the regulars, all Kondo old-hands. Note there are two arrows on the upper right hand corner which usefully let you reverse the chronological order.

Recently, a part-Kondo user from Scandinavia found the review33 thread and asked about the use of Ongaku as amplifier and matching with preamp. It is a worthwhile question which has not been addressed comprehensively on the internet. The question coincided with my recently re-initiated effort to tune-up my Kondo system. So I have decided to explore his question while tuning up my system. This article is the first of my experience, and more would be forthcoming. First, I'd like to introduce my Associated Equipment for this Round.

Two Digital Systems
Personally, particularly when exploring something serious, I like to play with different sources, be it digital or analog. Contrary to popular belief, digital is still more complex than theoreticians/CAS/Perfect-bit people make it out to be. While digital replay standards have improved in general, all the theories and latest "advances" are often (like digital itself) merely number crunching games that get you nowhere. It still holds true that a good digital playback medium depends heavily on the ears of the designer. There are good sonic reasons why the best of the older products are still being cherished and sought after by connoisseurs (which the head-fi crowd shall never be).
There is a reason why some designers like Thorsten Loesch (now of AMR) still see greatness in the 16-bit TDA-1541 chip! Of course, "perfect-bit" or not, digital has yet to hold up to analog!

Aside from WE, perhaps nothing is more serious than Kondo, and a proper evaluation should be multifaceted. Mine uses older equipment that to me have retained their allure, in many aspects trumping their much more modern yet soul-less counterparts. And the two different sources differ markedly in gain, which proves to have relevance.

Digital System 1 This utilizes the superb Sony CDP-R1 as transport, and its matching DAS-R1
(16-bit TDA1541A; normal output level ~2V) as DAC (full pic at bottom of article). Connection is by the proprietary Sony Twin Link. I have previously written about this venerable system here. I'd like to add that subsequent evaluation has confirmed the greater, indeed exceptional, dynamic prowess of the Twin Link, and the connection is used as one of my references, particularly in replay of big complex music. Of course, the 16-bit TDA 1541A still reigns supreme in reproduction of the hall sound, and subtlety in integrating the whole sonic fabric. If there is a fault, it is that the Sony is a little too smooth, rounding out the edges of rhythmic figures.

pic of the AN DAC-2; note the PCM63 and tranformer I/O; click to enlarge

Digital System 2 This system is more complex. It still utilizes the same superb Sony CDP-R1 as transport, but is more complex downstream. It uses the more conventional RCA digital output of the CDP-R1, which is connected to:

Genesis Digital Lens Over the years, the Genesis Digital Lens, an old anti-jitter system if you will, has stayed in my system. Its 5 inputs and 3 outputs offer infinite connectivity, and more often than not, even with modern DACs with supposedly top-class jitter-reduction, it improves the sound by firming out the contours. In some combinations, a mild deleterious effect of a little dryness can be detected. In this system it is connected via the same Gotham 10070 to the:

Audio Note DAC-2 My DAC2 is an older version, which employs the great-sounding 20-bit Burr-Brown PCM63P; it likely uses the non-oversampling (NOS) technology and transformer I/O; output is via 2x 6DJ8; the output is significantly higher than normal; I don't have the official spec, but it should be much greater than the standard 2V, likely 3-6V).

Gotham 10070
2 runs of this cheap but reference-grade coaxial digital cables are used. This utterly transparent and musical S/PDIF cable has outperformed everything else in my system. While here, I shall tell you Gotham's XLR digital cable is equally distinguished (as are the entire line).

Analog interconnect cable from either digital system to the preamp is Gotham GAC-4, one of my references.

System Used

For those who don't know my Blog well, please go to the right hand column of the Blog; scroll down to see the equipment I use in both Hong Kong and NYC. This will give you an inclination on my preferences. For this round, I used:

Preamp: Kondo KSL-M7 (stock Sylvania 6X4; 2x Mullard ECC82)
Cable from Preamp to Amp: Gotham GAC-2
Amp: Kondo Ongaku (stock GE VT4C and 4x JJGZ34; triple-mica black-plate 6072; Tung Sol 5687)
Speaker Cables: Gotham 50150 (another marvelous Gotham)
Loudspeakers: Tannoy Canterbury HE

Notes on the Tannoy Canterbury For the past years, since I received them in very dark-sounding condition, I have run these in with increased treble energy and rollover. While these setting still work marvelously well with the WE setups, with the Kondo setup I have found restoring close-to-default settings reaped greater benefits, while extracting no cost from the WEs!
Although Kondo is not bright or harsh, its strong presence and unrivaled airy presentation demand partnering with the right loudspeakers. Those with overly strong or grainy treble just would not do, particularly with digital sources.

R pic of Ongaku front; click to enlarge.

Ongaku as Integrated Amp (Digital)

To facilitate comparison, I used the Direct In exclusively. Unlike some erroneous reports, this bypasses only the selector and renders the other inputs (except tape) useless. The source/tape selector, balance and volume all remain functional. Note that the balance function desirably operates over a usefully narrowed range. In my system, the volume knob ranges from 9 to 11 o'clock depending on the digital system used and material.

With such a "monumental" project, I opted to use one CD as my main test material, and the MANGER Test CD (tracks here) it was to be.
I am happy to report that both digital systems, though different in their presentations, yielded excellent sound.

Digital Systems 1 vs 2 In general, System 1 is more composed, always finely layered and cultured, never making an ugly sound; whereas system 2 has more rhythmic incisiveness and a more "vocally" declamatory nature, more "hifi" too if you will.

  • -Track 1 With System 1, the bells are more telling in their tolls, their tones more varied and differentiated.
  • -Track 2 The cinematic effects and timbers of the various personae are better differentiated by System 2.
  • -Tracks 3-7 These classical tracks are overall better rendered by System 1, no-less by more accurate portrait of strings timber, but in terms of rhythmic accuracy (tracks 6-7) System 2 has the upper hand (Sony is weakest in this area). System 2 also portrays the piano (track 3) with more body and realism.
  • -Tracks 8-10 and 12-13 These Jazz/Pop-influenced tracks undoubtedly has more emphatic and audible rhythmic variations with System 2.
With classical and complex material System 1 scores a little higher, whereas in smaller pop/jazz combos I'd give the edge to System 2. Overall, I'd narrowly give the edge to System 2 for its superior PRaT. Please note that System 2 has the much higher output, and I believe that is an advantage when using the Ongaku as integrated amp.

Ongaku + M7 (Digital)
Direct-in was used throughout. After hours of going back and forth, I have to conclude that, with digital playback, adding the M7 is not really that superior to direct-in:

  • With the M7 , the position of the volume knob of the Ongaku is somewhat arbitrary, up to the preference of the user as well as the nature of the music played. I am not certain what is the optimal, but I resist having it much over 12 o'clock, as I think past 1 o'clock or so the sound coarsens significantly.
  • Addition of The M7 immediately brings about a more panoramic soundstage that is greater in both width and depth.
  • With the M7, Digital System 1 gains perhaps a little speed in the leading edge and a firmer rhythm, though it shall never be the equal of System 2 in this regard. More, this comes at the cost of loss of a little subtlety in certain areas, like massed string timber. I also notice that the hall sound is reduced somewhat.
  • With the M7, Digital System 2 displays an even more upfront rhythmic signature, but the depth of attack and PRaT are not necessarily superior to direct-in. In other words, what benefits System 1 a little is less obviously useful here. Note also that the high output of System 2 can be attenuated with the level control of the M7, but it'd take time to arrive at the optimum; I used the 1 O'clock position.
  • Overall, with significant reservations, I'd say addition of the M7 brings about a somewhat more even quality, but digital direct-into the Ongaku can be a success (higher source input level desirable). So there is much room for tuning the sound.

Analog experience to come in Part IV. Suffice to say I also think the higher the cartridge's output the better...

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