03 September, 2010

Review: MARTIN LOGAN Source

Review: MARTIN LOGAN Source

Further Notes: Fall 2009

: If you don’t believe hybrids can work, don’t read further. If you believe Quad or Maggie or whatever looks flat rules, read no further. If you want to fight over what planars are best, get away! For those a little more objective, or less stubborn, a star is born.

A Tale of Two Drivers: An old colleague had a large hybrid ML which, because of wife factor, he placed close to the front wall, and that was a no-no. He bi-amped with Jadis Defy 7 and an Aragon. No, I’d never do that if that’s what it takes. However, even then, I heard many good things, and have kept an eye on this company. It seemed to me their products have steadily gotten better and better. Back some years ago, you could have heard quite a bit of ML hybrids in show conditions, but not any more, as ML, like other stats, is really a minority taste in HK. I remember a smaller ML floor-stander in a hotel room having one of the best sounds in the show, better integration than a lot of the Wilson’s, Dynaudio’s and quite a few of those horrid German speakers in the same show. However, labels are difficult to shake off, and “coherence” has always been an albatross on the neck of ML.

My discovery of this pair was due to Jonathan Valin’s review in the March issue of TAS. Now, I am rather neutral towards JV the writer, unlike a few others of TAS (like Steven Stone, who should just stick to desktops). What caught my eyes in this review were:

  1. Small footprint and rather nice styling.
  2. High sensitivity; 90 db.
  3. JV’s claim that the ML is the most coherent hybrid he has ever heard, with almost no discontinuity he can discern. That’s a tall statement, but from a man (and a magazine) who should know his planars and who used to own the ML CLS. He’s putting his reputation on the stake for this statement.
  4. Paper cone woofer (though you can’t tell by looking).

Searching for Godot: My friend E and I set out to find some place to hear this. Harvey’s is defunct but still maintains a “shop” in an unlikely lower Manhattan mall. They are dealer but the guy just dismissed all MLs, and none was on the floor. Sound by Singer, where we heard the Vienna Acoustics Haydn Grand and Focal Chorus 705/6Vs (all TAS editor’s choice), did not have MLs. So no luck.

By chance I saw a like-new pair on the web for sale and, after some emails, landed a brand-new pair at substantial discount! My friend E was really surprised as ML, like B&W, doesn’t usually discount at all.

Great Expectations: Two huge boxes arrived like a pair of Trojan horses, much larger than the speakers themselves. Power supply is via a small wall-mart like box not much bigger than a deck of cards, which never even gets warm, visually less threatening than Quad. There is a rear-firing port, and the woofer is located less than 1 ft from the floor (sans spikes), things that I usually avoid in my speaker selection, except this time. The manual is very well written, advising distance between the speakers and the front and side walls. I have no problem with the front wall, but have problem with one side wall, closer than recommended.

For the run-in period (manual says 72 hrs for the woofers) I had the right speaker virtually against the side barrier. The left speaker’s woofer is very close to the couch but its port is well ventilated due to the presence of a nearby corridor in the rear. And so, while the left side poses no problem, bass on the right was suboptimal at first, not helped that the classical music I listen to usually have a lot more bass to the right. Adjusting the degree of the port helps quite a bit. Although absorption supposedly does not work at low frequencies, I thought a large piece of cloth helped (maybe just psychological?). Sound in the mid-range and treble was startling good from the start, not surprising as suspense is in the bass. These are nominal 5 ohm speakers, with lowest impedance of 1.6 ohm at 20k Hz. This did not trouble my NAD 325BEE, nor the Marantz 8B, and had no trouble driving the Source to good level.

The bass gradually cleared up, becoming more and more layered. I moved the right speaker one ft more into the room and the bass cleared up further. Note that I did not install the spikes for fear of scratching my wood floor. Even then, for my loud listening level I find them satisfyingly coherent. Nor did the higher-than-normal cross-over point (470 Hz) seem to color any instrument.

After experimenting with toe-in, one can get superior dispersion (for stats), and I can sit anywhere and things still remain in the center. No, none of that tiresome move-your-head-a-little-and-hear-only-one-speaker thing. The images are tall, just like the MMG. My friend E auditioned this with me from the start and he, like I, preferred the Source to the MMGs for its realism and bass performance, even if the lean bass of the MMG is more room-friendly. Here I have to emphasize that I think whatever little problem the bass may have is due rather to the port and non-ideal placement of my right speaker. I don’t find the bass slow at all, nor do I think there is anything incoherent anymore than I may (and do) find in many conventional ported designs, or even “true” ribbon Maggies (which JV thinks are less coherent than Quasi’s). If anything, the bass performance outshines that of many conventional speakers. It goes deep and is rhythmic and walking when it should be. Even the droning bass guitar of Wilco’s A Ghost is Born cannot faze the ML.

How does the Source sound? JV said it best: “In a word, terrific. This is one very quick, very high resolution, surprisingly robust, wideband, and coherent loudspeaker, capable of making select voices and instruments sound as you-are-there ‘real’ as some multi-thousand-dollar big boys…” Sound is not as warm as Quad, but certainly warmer than Maggies. The spec’s of 42-22k Hz +/- 3 db is definitely on target, and you can still hear bass a little lower than that. I know there are people out there who think of Maggies as the most live-like thing out there. That’s simply not true. Although the imaging of Maggie is uncanny, that does not necessarily equate real presence, and in that department, good as they are, Maggies lag behind good horns, Lowther, Apogee, and Quad. Now, add ML to the list. It simply has a presence that the MMG does not.

Now, with one month on them (mine is likely equivalent to the usual person’s half a year), not only has the bass snapped into focus, the treble has also become that little bit smoother. I think they have completely broken in, and I think I can give this report with confidence. These are very revealing, yet never fatiquing as even the “true ribbon” Maggies can sometimes be. It’s like a marriage of Quad and Maggie, with the tonal purity of the former and the dispersion of the latter. Though, the soundstage has good depth but less lateral spread than Maggie, I feel the first class presence makes music sounds more like a live event, in a real hall, and not artificial “soundstage”. As I listen to to Perahia’s Mozart K453 (Sony/LP), I can clearly visualize him moving the keys with varying touch, as well as the string players leaning forward and digging in and, yes, the oboe sounds so real I recall CP’s unique ESL 57 sound. Yes, I have packed away my MMG for the moment. And even the SF EA-II is gathering dust.

Epiphany: I have saved the biggest surprise for last. I was checking out for my friend E his pair of Cary 300B Signature monoblocks. It turned out someone never bothered to adjust bias and one was run at close to 90 mA and the other at an unbelievable 125 mA, a testament to the excellent built of Shuguang 300B! Anyway, after adjusting them back to normal I hooked them up to the ML for fun. What do you know, perfect match! The presence factor was taken to the level of uncanny realism. Most amazingly, paino recordings really shone and that’s one of the highest accolades you can give a pair of speakers. Horowitz in Moscow (DG) sounds as full bodied as if it’s played on 15” JBL’s (if you don’t know it, the rendition of piano is a strength of big JBLs).

Big orchestral works posed no problem too. People who know me know that I listen at concert hall level. The ML acquits itself splendidly: Wand’s Bruckner 6th (RCA) is energized and has gravitas; Solti’s Shostakovich 9th (Decca) is all quicksilver and tongue-in-cheek. And yes, no super-tweeters nor subwoofers needed. Better leave those at your voodoo master’s place. After this, I tried the Sun Audio 2A3 (~2 watts), which did fine though the 300B amp’s inherently leaner bass and greater power provides a somewhat better match.

The other day, my friend M arrived when I was listening with E. M said, “Sonus Faber playing? Nice vocals!” That should say it all about vocals.

My daily listening now is the Source as heard through the very humble AES SE-1 300B amp, hooked up with Belden 9497. Even though it may be hard to find this lowly ML demo’ed anywhere, try to check this out if:

  1. you’re a SET amp fancier (but the dealer would surely not use a SET amp).
  2. you’re an electrostatic or other planar fancier, but not yet locked into the “XXX is best and there is simply no other choice” camp.

Keep in mind partnering is not a problem, but you need good and costly real-estate around the speakers. As with any speaker that has lowly placed woofers and rear port, clearance from front and side walls is a must. Even if your condition does not permit, these are great speakers that are worth a serious audition. At some point I also plan to audition ML’s new flagship, the all stat CLX.

Less is More: There’s an irony about the whole thing. Ever since I started listening to direct-heated triodes about 10 years ago in HK, all else have become secondary. I have always missed the sound of SET whenever I return to NY. This time I brought back my AES and planned on other SET amps to be used in my bedroom, as big efficient speakers are out of the question in the living room. The ML, with its small footprint, was bought to have a taste of electrostatics without attendant troubles. Little did I think these would prove SET-friendly. This shows the truth that there is always no harm trying, and once in a while you can be rewarded BIG. Now, SET is set (no pun intended) to be the main thing in my living room, though I have a suspicion they shall do very well at low level even in my bedroom. For me, that’s a bounty!

(See pic) The other day my friend E took his vintage RCA single-ended 6V6 receiver and it drove the ML Source beautifully, with no lack of power, though midrange was decidedly on the lean side. For fun I hooked up my pair of BELL 2122 integrated’s and sound was more mellifluous. Just for fun, we hooked up the Marantz 8B, which did fine too, though the sound of EL 34 PP cannot really compare with 6V6 PP in finesse and subtlety. All concluded that the ML works best with small powered amps, with SET delivering undeniable extra magic. And yes, I'd love to hear these with OTL's.

In the November issue of TAS, Robert Harley reviewed the Wilson Alexandria X-2 and mentioned its 95 db efficiency lends itself to being driven well by 50 wpc channel amps (like Naim) and outstandingly by even SET amps (he cited Lamm). In the wake of my recent experience with SET driving ML, I cannot help thinking about the mediocrity of many of the Wilson’s I have heard in HK driven by big amps. Perhaps they should try alternates, like what RH mentioned.


wesley said...


an excellent and informative review as usual, thanks for sharing.

it's good to have an open mind and i truly appreciate your efforts in trying out some much gears and reviewing them in an unbiased manner. it's probably because you don't do it for money.



Krishna said...

I bought Denon 3808CI. I have Martin Logan Source and Cinema in the fron. B&W 500 Watt subwoofer. I am having tought time make it better. anyhelp is greatly appreciated. I think I can make the system better by fine tuning.

doctorjohn said...


How are you placing the SOURCE? Placement is probably the most critical thing with this speaker. Too much against the wall can easily cause booming and that may make the addition of subwoofer even worse.


  1. Great review DJ! I just bought a pair of these on the strength of the brand's reputation alone for $400. I only heard them playing in a garage at the seller's home, bluetooth from my phone only long enough to see if the woofers and stat panels worked! He sold them to me with the steel wedges installed in 'home theater mode' (leaning way back so that in a traditional theater setting the panels would play at a 12 degree upward slope so their vertical sweet spot is aimed at the ears as the rows of seating rise towards the back). This wedge arrangement, being unknmown to me left me sobbing in self pity at the prospect of having purchased such hideous sounding speakers! After twisting the bases into 'normal' mode, my sobs turned to tears of joy! The sound stage, the dynamics, the uber low bass that seems to play closer to 30 Hz rather than their 42 Hz rating, I was gobsmacked!!! I tried not to breathe while listening to the last 2 minutes or so of Burabampo (The Deer) on Strunz and Farah's Misterio album which is a veritable obstacle course to showcase both the speakers' ability to resolve micro-detail and the utterly cavernous depth of its bass response. Finally, what a fantastic bonus after becoming immediately smitten with these speakers to also find that they were given great adulation by the high-end press as well!

    1. Wonderful! What a bargain at $400! This is a keeper for sure. Much underrated.