I guess this is the concluding part in my search for a good cartridge. At least for now and the foreseeable future as I seem to have found what I am looking for. It has been a long and lonely journey that one has to necessarily walk alone, wallet-draining but always fulfilling in the end.
All purchases were done blind since there was absolutely no way of auditioning them first (bought from across the seven seas). The seed that germinated the idea for a particular cart was either a good formal review, user reviews, or strong positive reference by someone who have heard it.
The parameters that were important to me are:
- very good resolution, since I believed that the rest of my chain has it but was being choked by the bottleneck in the cartridge.
- preferably neutral, but forgivable if it errs slightly on the warm side of neutral. I am certainly not looking for tubey warmth.
- must be necessarily musical
- fairly flat frequency response across the frequency spectrum
- must do micro and macro dynamics well
- as a bonus, if it does some crazy soundstaging stunts, I am OK
- I gave some thought to whether it is forgiving of bad records, but that is a secondary consideration.
- a match to my arm(s).
It turned out that not even a single cartridge turned out bad. Meaning I liked all of them. They are different. If one accepts that no one cartridge will ever do everything right, one is better placed to discover what will work best in one's setup. It is about choosing the strengths.
The journey of discovery had always been an exhilarating ride, certainly filled with the worry of uncertainty of how a cartridge might turn out in one's system, but also brimming with the joy of new discoveries and the joy of hearing new sounds for the first time in one's own setup.
So gentlemen, without further ado, please welcome the Decca/London Super Gold Moving Iron cartridge. For the technical minded, here's what the spec sheet says:
Specifications: London Super Gold
Type: Moving Iron cartridge for turntable
Frequency Response: 20 Hz to 22 kHz (+/-3dB)
Lateral Compliance: 15 x 10-6cm/dyne
Vertical Compliance: 10 x 10-6cm/dyne
Inductance: 130mH
DC Resistance: 2000 ohms
Input Loading: 47k and 100pF to 300pF, 33k and 220pF optimal
Output: 5mV at 5cm/s
Tracking Weight 1.5g to 2g, 1.8g optimal
The design of this cartridge is very different from that of a conventional cartridge. It doesn't have the usual cantilever that protrudes from the cartridge body at an angle. The cantilever more or less is flush to the underside of the cartridge body. The stylus shyly peeps out from the underside of the cartridge body, and protrudes by 1 mm or less. It also doesn't have a damping mechanism for the moving parts. It also has only three leads unlike the conventional 4 leads. Due to the lack of damping, the ideal tonearm for this cartridge is an unipivot arm with a damping mechanism but is known to work on mid and heavier arms too.
This review has a picture of the cartridge:
http://hometheaterreview.com/london-super-gold-cartridge-reviewed/
This link has more user pictures and some "gory" pictures of the innards of the cartridge:
http://www.lencoheaven.net/forum/index.php?topic=545.0
Setup:
This cartridge reached me last Friday but due to various other things that occupied me, I could only unpack and fix it up last night. Being high-output MI, it works the same way as an MM. I have set the impedance loading at 50 K Ohms and capacitive loading of 200 pF. Tracking weight is currenty at 1.9 gms.
VTA is roughly same as Denon DL 103 = ZYX RS 30-02. To be able to use both ground leads of both channels, I need to make some sort of a Y splitter. Right now only one lead is in use but there is no hum and both channels play without issues. But I am not comfortable having one tonearm lead hanging limply so I will make a Y split soon when I can peel myself away from the music.
Sound: long story short - this is the best cartridge I have heard in my setup (not that I have heard too many).
The absence of damping makes the sound very immediate. Attacks are blazing fast, and decays nicely sustained. It does startling dynamics. Whatever it picks up from the groove is sent with the least attenuation (due to the absence of a damping mechanism) or degradation straight to the phono pre. The bass is better than whatever I have heard in my setup, not necessarily more, but better by being more tuneful. I am yet to hear a good cello track but I already have high hopes. The mid range is pure, meaning high fidelity to instrumental and vocal tones. Violin, piano and vocals take on a new lease of life. Another thing that comes out very well is the tonal harmonics. I can't wait to listen to my favourite sax tracks to hear the complex harmonics of this instrument. Highs and upper highs are beautifully rendered - liquid, airy and pristine.
But its greatest strength is the way it can separate the various voices into something you can follow individually. An offshoot of this quality is the way it places the various voices in their respective places in space even on complex musical passages.
And for the first time in my experience, the sound stage width expands beyond the tyranny imposed by the speakers. And soundstage depth is well layered too. All "mythical" qualities I had for long longed for in my system.
All in all a very fine cartridge. If I sound gushing, perhaps I am. It's that good.
Things to do: set proper VTA and tracking weight and make Y split. And play some bad records and warped records.