Moerch Tone-arms

Hans Henrik Moerch, the designer and manufacturer of Moerch tonearms is a nice, decent human being. He has had his hand in making turntables, DACs and tonearms. His true professional love ended up being tonearm design and manufacturing. Hans Henrik is a perfectionist. This is one of the reasons we understand each other so well. He puts all his effort and love in making tone-arms. Even his packing is meticulous. Hans Henrik is precise and comprehensive. If you have a question, be prepared to get a full answer.

SORAsound has been representing Moerch tonearms since around mid 2006. During this time we have become a good friend of Hans Henrik Moerch and his wife Benedikte. SORAsound has also become Moerch’s biggest distributor in the world.

I had bought my first Moerch tonearm as an end consumer while living in Tokyo. In fact, I had bought two armwands for it, one to use with my ZYX cartridge, and the other to use with my Miyabi 47 Lab cartridge, both to be used on my AMAZON Model One turntable. In fact, the beautiful Amazon Audio turntables we distribute were also designed with Moerch tone-arms in mind, hence the great synergy of the two.

Aside from owning one of the best tonearms in the world, there are other advantages in having a Moerch tonearm. You can have multiple, easily replaced armwands for each cartridge you have. You can also use the appropriate armwand weight to get the best sound out of your cartridge.

Moerch tonearms come in two models: Moerch UP4 and Moerch DP6. Each tonearm comes in gold or chrome. Each can use 9 inch or 12 inch armwands. Moerch headshell can be standard or precision (to accommodate larger cartridges). Moerch also makes a high quality high value phono cable, DIN to RCA (XLR by special order).

Moerch armwands come in 4 different weights to optimize use of different cartridges. Hans Henrik is thinking of producing only two weights from now on. For someone who likes to stock everything so my customers can have anything they need upon request, this is a blessing.

The model MØRCH DP-6 has a unique combination of bearings. A silicone-damped, high precision ball-bearing assembly is used for the horizontal plane of motion. Two precision sapphire bearings are incorporated for the vertical mode of motion, which may be damped also, if desired, by injecting silicone fluid into a well for vertical damping. The damping of the horizontal plane of motion is independent of the damping of vertical mode of motion, and the latter can further be adjusted to all intermediate levels of damping.
In model DP-6 the azimuth adjustment for perfect channel separation is accomplished at the pivot of one of the sapphire bearings.

The MØRCH UP-4 incorporates a special concept of the unipivot principle. The bearing consist of a hardened steel pivot resting in a concave, polished sapphire. The bearing is damped in all directions with silicone fluid. The low positioning of the bearing provides for a greater stability compared to other unipivot arms, since a considerable part of the moveable mass of the arm is positioned above the pivot point. With the model UP-4 the azimuth adjustment is made by the way of the counterweights.

a noteworthy point: hans henrik moerch is a perfectionist. when he makes a tonearm, he checks the color and quality under great light inside, and under beautiful sunshine, when he is lucky to have it in copenhagen to ensure consistency and quality of work.

DP6 Review by Mr. Roger Gordon of Positive Feedback.

Specifications

Table below shows Moerch UP4/DP6 specifications bearing in mind that any and all part of this information is subject to change without notice.

Construction: Radial arm with interchangeable arm tubes
Bearing principle: DP-6 Dual bearing
UP-4 Unipivot
Effective mass of complete tonearm with arm tube:
Light (green):
Medium (red):
Heavy (yellow):
Extra heavy (blue):
All arm tubes can be used with both models
4 g
6 g
8 g
14 g
Fundamental resonance (depending on arm tube): 8 – 16 Hz
Tracking force (when using calibrated scale): 0 – 3 g
Bias compensation: Watch spring with string – adjustable while playing
Azimuth: Azimuth is adjustable for correct channel separation
Cueing mechanism: Piston in U-pipe, damped with silicone fluid
Distance between pivot and center of turnable platter: 212 mm (8 5/16″) or 294.1 mm (11 9/16″)
Diameter of hole for mounting arm base: 20 mm (13/16″)
Rear overhang from pivot: 70 mm (2 3/4″)
Effective length: 230 mm (9 1/16″)
Offset angle: 24 degrees
Lateral tracking error: 0 degrees at 66 mm and 120.9 mm from center of record
Pivot point: Pivot point is in level with the record surface
Bearing Friction: Bearing friction less than 0.04 mN in all directions
Balancing: Four (4) different balancing weights
Internal wiring: 19 strands of ultra pure silver insulated with Teflon
Capacitance per channel: 28pF for both models
Tonearm Cord: Balanced. Extremely purified copper strands that are heavily silver coated. Halogen free insulation
Moerch tonearm connector with Cardas DIN inlet and RCA connectors.
Capacitance per channel: 100pF
Terminals: All terminals throughout the arm are gold plated
Bearing concept of model DP-6: One internally damped, precision ball-bearing assembly for the horizontal plane of motion. Two pivoted sapphire bearings for the vertical mode of motion which can be damped also, if desired, and then adjusted to different levels of damping
Bearing concept of model UP-4: Hardened steel pivot resting on a concave sapphire, and damped for all motions with silicone fluid
DP-6 finish: 24 carat GOLD, CHROME
UP-4 finish: CHROME or GOLD by special order

Related Posts

No related posts.

Prices

SORAsound is the exclusive distributor for US, Canada and the rest of the Americas for Moerch tonearms. Suggested retail prices are shown in the table below:

dp6 gold precision $3,350
dp6 gold 12 inch $3,150
dp6 gold standard $3,000
dp6 chrome precision $2,950
dp6 chrome 12 inch $2,750
dp6 chrome standard $2,600
up4 chrome standard $1,950
armwand gold/chrome precision $1100/1000
armwand gold/chrome 12 inch $900/800
armwand gold/chrome standard $750/650
phono cable $400

Private: Cartridge Tonearm Combination

Cartridge/Armtube Combination List

PREC./red can be used for “green”, “red” and “yellow”. PREC./blue for “blue”. There is only a small difference in effective mass between “red” and “yellow”. For 12” armtubes “yellow” should be used also for “green” and “red”.

Recommended armtube

green green-red red or yellow blue-PREC/blue PREC./red-red green blue-PREC/blue red yellow-red blue-PREC/blue red red yellow green yellow-red-PREC/red yellow-red-PREC/red green-red-PREC/red green-red-PREC/red yellow-red-PREC/red yellow-red PREC. Red/green red or green green green/red red/green red red red red Precision/red green yellow/(blue) blue green yellow green red/green yellow PREC/blue green/red gren-PREC/red green yellow yellow green green-red red-PREC/red yellow-PREC/red green-PREC/red red-green green red yellow green-PREC/red blue

Manufacturer

Acoustic Signature Ace Allerts Audio Note

Audio Technika

Audioquest Bang & Olufsen Benz-Empire Benz-Micro

Cardas

Cartridge Clearaudio

Crown Jewel Decca

Denon

Dynavector

EMT

Model Weight (g)

cartridge armtube combination list.doc

Manufacturers of high quality Audio Equipment

Challenger 8.3 8.8 10.0 11.0 11.0 18.0

Soara IO IO II AT-F5/OCC AT-OC5 AT-OC7/OC9 AT-95E AT-ART 1 ART 1

MC-5 MMC 1 MC-1000 MC-2/3 Reference H 2.0 Glider MC-Gold/Silver Ruby

Ruby 2 LP L2, M2, H2, Ref2 Ace ACEL Myrtle Heart Myrtle Silver Heart Music Maker III Gamma S / Insider Accurate Concerto Sigma Signature Stradivari Insider Victory Speciel Edition Super Gold Jubilee London Jubilee DL-1000 A DL-103 D DL-110 DL-304 DL-S1 17 D2 Mk II 23RS Mk II XX-1 XX-2 Mk II DRT XV-15 DV-20X H/L DV-10X5 HSD 6 JSD 5

5.0 8.0 7.8 5.7 8.5 9.5 6.0 1.6 7.5 7.5 8.6 8.6 5.6 5.7 8.2 9.6

10.7 9.0 8.8 8.8 9.1 9.5 6.2

10

4.0

4.5 12.0 4.4 12.0 8.0

8.0 6.7 10

6.0 7.5 4.8 7.0 7.0 5.3 5.3

12.0 8.9 12.6

8.6

6.6 12.0 11.0EMT Empire

Garrot Glanz Goldring

Grado

Grado v.d.Hul

Kiseki

Koetsu

Lyra

Linn Madrigal

Monster

My Sonic Lab Mørch Ortofon

Phase Tech Shelter

JSD 6 11.0 MC-1000 7.5 MC-Silver 5.7 P-77 5.8 10 LX 4.8 Eroica 5.5 Electro 2 9.0 MM 042 6.3 All SIGNATURE models 5.0 Ref. 6.0 Reference Master 6.5 Statement Sonato 6.5 Frog 8.2 Grashopper 12.2 Grashopper IV GLA 8.6 Grashopper V 8.6 MC 10 7.5 MC 1 B

MM-1/2 6.5 Colibrie 6.0 Colibrie XCP Myabi 12.3 Black Beauty SPX 8.5

Purplehart 7.5 Purplehart Sapphire 7.5 Blue Gold Spot 11.4 Miltek Aurora 9.6 BLACK 9.5 EMC 1B 9.0 Urushi 11.5 Onyx 12.0 Rosewood 9.5 Rosewood Signature 6.7 Argo 4.6 Clavis 11.0 Dorian 6.4 Lydian Beta Blue 8.0 Helicon 8.0 K9

Carnegie One 6.5 Carnegie Two 9.0 Alpha 1 6.5 Alpha 2 6.8 Alpha Genesis 1000

Alpha Signance 2000 4.2 Eminent 9.0 DACAPO 6.8 Jubilee 10.5 MC 1 Turbo 4.1 MC 15 Super II 7.0 MC 20 Super II 10.0 MC 30 Super II 10.0 MC 30 Supreme 10.7 MC 2000 Mk II 9.5 MC 3000 Mk II 9.5 MC 7500 11.0 MC Windfeld 13.0 Rohmann 9.0 SPU Royal 12.8 OM 10-20-30 5.0 Kontrapunkt A+B 10.0

12.0 501 8.1 901 9.1

blue yellow-red-PREC/red yellow red blue-PREC/blue blue-PREC/blue red green red-green green green green-red green PREC/red green/red green/red yellow-PREC/red blue-PREC/blue green green-red green green green

blue-PREC/blue blue-PREC/blue (yellow) yellow blue-PREC/blue PREC/blue-blue PREC/blue-blue red red green-red yellow yellow red-PREC/red yellow yellow/PREC/blue green yellow-PREC/blue yellow-red yellow yellow-red red yellow yellow yellow yellow-PREC/red green/red blue red-yellow green-red PREC/red-green green-PREC/red PREC/red only PREC/red only PREC/red-green green-PREC/red PREC/red-yellow blue green red-PREC./red green/red red red

Manufacturers of high quality Audio Equipment

Shelter Shure Shutter Stanton Sumiko

Supex Transfiguration

Tsurugi Xuzura ZYX

S 9000 11.0 red M97HE 6.6 901 9.1 red 881 5.8 green-red Celebration 7.0 yellow Black Bird 9.6 red/yellow Blue Point 6,0 red

Evo III 8.3 yellow-red Blue Point Special 9.0 red/yellow SDX-1000 4.7 blue-PREC/blue Spirit 7.8 PREC/blue-blue Temper 7.5 PREC/red-yellow Fria 7.8 red Esprit 7.8 red

9.0 PREC/red-yellow KC-REF 9.0 blue

RS 10-20-30 4.2 blue R 100 4.2 blue R 1000 Airy 3 5.0 blue R 1000 Sigma S-X 5.0 blue Universe 5.0 blue

Also the below formula can be used to find which armtube to use for any cartridge.

Fress = 159 Hz (MA +Mcar)⋅C

Fres is the fundamental resonance of cartridge compliance and the total mass of cartridge and arm. The best armtube is the one that gives a figure of Fres=11-12 Hz or as close thereto as possible.

Fres can be found by inserting MA, Mcar and C into the formula, where MA is the mass of the arm, Mcar is the mass of the cartridge and C is the compliance of the cartridge in μm/mN. Should the compliance be stated differently, it is always the first factor to be used (ranging from about 5-40).

The masses of the arms are green= 4 g, red= 6 g, yellow= 8 g and blue= 14 g.

Thus if the cartridge has a weight of 7 g (Mcar), and the “red” armtube of 6 g (MA) is used, the total mass of cartridge and arm is 13 g. If above mentioned factor of compliance is 14 (C), then 14 should be multiplied by 13 and the square root extracted. This makes 13.5 which is then divided into 159 and the fundamental resonance (Fres) will be 11,8 Hz.

Thus in above example the armtube was ideal. But for instance if the above figure (Fres) was too low the same calculation could be made with the “green” armtube, etc.

There is one snag about it. The manufacturers of cartridges do not always state a useful value for C. (It should be started at 10 Hz). Figures of C coming from Japan usually are measured at 100 Hz, so they should be multiplied by 1.5-2. Figures of C coming from USA often are static values, so they should be halved. Most figures of C coming from Europe are OK (stated at 10 Hz)

Also the tracking force could be used, as this usually is a function of the compliance. For instance with a tracking force of 1.9 g the compliance would be around 14. With a cartridge mass of 6 g the “yellow” armtube would do. With a cartridge weight of 10 g (and the same C) the green armtube should be used.