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Radial Audio Stealth One – Setup Manual 

This manual addresses the setup of the Stealth One on your turntable.  Refer to the Owner manual for 
day-to-day care and maintenance of the Stealth One. 

Congratulations!

 

You have purchased the finest tone arm in the world.  The Stealth One is a precision electro-mechanical 
device.  It plays vinyl recordings in the same manner in which the recording was originally cut on the 
mastering lathe, in a straight line.  The Stealth One completely eliminates “skating” forces during 

mastering lathe, in a straight line.  The Stealth One completely eliminates “skating” forces during 
playback, along with the tracking errors present in all pivoted arms.  With normal care and minimal 
maintenance, the Stealth One will bring you consistent imaging and accurate sound reproduction from 
the outermost groove to the innermost groove of every vinyl record.  Since the arm is unlike pivoted 
arms, you are strongly advised to read these instructions thoroughly before beginning installation. 

Unpacking Instructions 

Follow these steps: 

1.

 

Grasp the Plexiglas channel with one hand, and steady the shipping container with the other 
hand.  Gently pull both the arm and the attached two foam end panels entirely out of the 
shipping container.  Set on a smooth, uncluttered workspace. 

2.

 

Remove the two foam end blocks, and replace them in the shipping carton. 

3.

 

Remove the accessories box from the shipping carton, and place it on the workspace. 

3.

 

Remove the accessories box from the shipping carton, and place it on the workspace. 

4.

 

The tone arm is mounted upon a 12”x2.5”x3/8” thick black Plexiglas base plate.  The arm and 
base plate are held together by four Neodymium magnets (visible from the bottom of the base 
plate at the four corners, where the front and back elevator towers meet the base plate). 

5.

 

The next page provides a complete listing and photos of the accessories provided.  The 
accessories list shows the quantity of the items and the installation step in which the accessory 
is used (steps A to F).  Please review the list and find the picture of the accessory below the list.  
Some of the accessories are provided to assist in the initial setup of the arm on your turntable.  
Select those accessories now (step A), and set the other accessories aside for midstream or 
optional installation later. 

6.

 

Please contact Radial Audio if any accessories are not present, or need to be replaced in the 
future. 

 

 

 

 

 

Summary of Contents for Stealth One

Page 1: ...e shipping container with the other hand Gently pull both the arm and the attached two foam end panels entirely out of the shipping container Set on a smooth uncluttered workspace 2 Remove the two foa...

Page 2: ...e simulator block for verifying cartridge verticality 7 1 B Cartridge simulator block for verifying cartridge verticality 8 10 B M2 5 x 1 nylon screws Philips head for cartridge mounting straight Razo...

Page 3: ...from a straight front or rear turntable frame Turntables that are organic in design may still be conquered but with more ingenuity required If the turntable resembles an unidentified flying object it...

Page 4: ...on the turntable s frame Now position the tool at 90 degrees and use tape to immobilize the tool to the platter Don t want to use the stylus alignment protractor Don t want to use the stylus alignmen...

Page 5: ...he plinth s rectangular form position the Stealth One with base plate only no arm and eyeball it parallel to the turntable plinth s right hand edge Place the scribed line white LP on the eyeball it pa...

Page 6: ...od First measure near the front of the turntable plinth left below and then near the rear of the turntable plinth right below 6 On the tone arm base plate locate the four mounting holes with a slotted...

Page 7: ...lly remove the parallel wooden spacers The mounting board appears to float with an equal mote on all four sides This process transfers the square accuracy of the Linn Sondek s wooden frame to the cust...

Page 8: ...Above custom Linn Sondek LP 12 tone arm mounting board using magnets for alignment and hold down 8...

Page 9: ...rod To adjust the position of the counterweight loosen the blue thumb nut in the direction that the counterweight should move and then rotate the other blue thumb nut in the same direction to again sn...

Page 10: ...ol insures that the stylus will be standing up perfectly straight when attached to the cartridge mounting pad Less than perfect vertical could be the result of either the front tower s elevator or the...

Page 11: ...Xacto knife or sharp shipping carton knife work as well Insert the two black nylon screws thru the cartridge mounting holes and hand tighten both screws as much as possible onto the cartridge cartridg...

Page 12: ...t overhang position of the cartridge mounting pad should the cartridge mounting pad be removed for cleaning etc After the stylus overhang position is finalized then use the M2 L wrench to gently turn...

Page 13: ...r is approximately 1 125 28mm above the plinth The elevators can rise above the towers as much as 75 19mm but should not be lowered below the tower top edge more than 125 3 175mm as the counterweight...

Page 14: ...owers the Plexiglas channel in minute increments An M6 aluminum bolt runs vertically thru each elevator part At the top of the aluminum bolt is a hex void where the elevator adjustment knobs can be in...

Page 15: ...bove the vinyl record just enough to clear the ridge at the LP outer rim The stylus drops a minimum vertical distance from above the LP Parallax is greatly minimized at the expense of being able to st...

Page 16: ...r of the punched hole and along the center of the strip of paper the length of the strip Mark two points on the line When the paper is on the spindle and lying on the mat one point should be near the...

Page 17: ...l mounting but handy for cuing Two stubs on a Wand finger lift 5 gr optional mounting but handy for cuing Two stubs on either side of the arch fit into the same two slots used to hold the cartridge mo...

Page 18: ...l bearing pressure can be set thru a hole in the outer gimbal It is best to set the horizontal bearing pressure before setting the vertical bearing pressure It is best to set the horizontal bearing pr...

Page 19: ...a Wand weights 1 Delrin Ladder cartridge mounting pad signal hat signal wires finger lift 18 gr 2 Delrin medallions 19...

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