Back in the late seventies, Artech Electronics commissioned J.A. Michell Engineering to manufacture a new spike cone which we dubbed Tenderfeet. Since that time many thousands have been sold worldwide. Tenderfeet are solid anodized aluminum cones designed to fit underneath your audio components. They mass-load your equipment to whatever they are placed on, and provide a high impedance mechanical interface between the surface on which the equipment rests and the equipment itself. This prevents ambient vibration from affecting the performance of loudspeakers, turntables, compact disc players and electronics. With loudspeakers this ambient vibration can be the delayed, self-generated standing wave present in the floor or bookshelf that the loudspeaker rests on. With turntables and electronics this vibration is largely loudspeaker generated.

Tenderfeet prevent loudspeakers from rocking which dramatically increases resolution at higher frequencies, and also increases the clarity and definition of bass notes. Tenderfeet will enhance spatial accuracy and reduce the boxiness associated with smaller speakers. Focus of separate instruments will improve. Increased low level detail will be more apparent, especially in the attack of stringed instruments — and the increased sense of "air" around instruments and vocals.

The greatest improvement will be heard with loudspeakers, then in turntables, tube electronics and transistor electronics in that order. Power amplifiers seem to benefit more than preamps.

Tenderfeet come in two sizes. The small ones are only 15mm high and will fit under turntables, electronics or loudspeakers mounted on hard surfaces. The large size are 37mm high, to be used on loudspeakers or electronics placed on carpeted or hard floors. The long, sharper taper will pierce carpet, thereby coupling the component solidly to the floor. Both sizes are available in a black or silver anodized finish that will not tarnish or discolor. The large Tenderfeet come standard with a 8-32 threaded hole which will accept hanger bolts for screwing to your equipment. Large Tenderfeet are also available with larger 1/4-20 threads. All Tenderfeet are 34mm diameter at the base.

We recommended three Tenderfeet for each piece of equipment. For larger loudspeakers, we recommend four Tenderfeet fitted with hanger bolts for levelling, or our adjustable Spike Feet (Type I for surface mount, Type II for flush mount). For those who want the benefit of Tenderfeet or Spike Feet without the possibility of scratching fine furniture or floors, we recommend using our Tendercups.

Description
Retail
Large Silver Tenderfeet - 8-32 thread $19.95 
35mm Dia. x 37mm high, threaded 8-32 for optional hanger bolt - see below  
Large Black Tenderfeet - 8-32 thread $22.95 
35mm Dia. x 37mm high, threaded 8-32 for optional hanger bolt - see below  
Hanger Bolts $0.99 ea.
To permit large 8-32 threaded Tenderfeet to be screwed into the bottom of wooden loudspeakers or stands. Wood screw protrudes 5/8".  
Large Silver Tenderfeet - 1/4-20 thread $19.95 
35mm Dia. x 37mm high, threaded 1/4-20 (no stud supplied). Fits Oracle, Martin Logan, Mirage, Merlin, Apogee NHT and others.  
Large Black Tenderfeet - 1/4-20 thread $22.95 
35mm Dia. x 37mm high, threaded 1/4-20 (no stud supplied). Fits Oracle, Martin Logan, Mirage, Merlin, Apogee NHT and others.  
Small Silver Tenderfeet $12.95 
35mm Dia. x 15mm high  
Small Black Tenderfeet $15.95 
35mm Dia. x 15mm high  
   
   

 

Tendercups

Tendercups were conceived by one of Artech's sales representatives to fulfill the need to protect fine furniture and floors from possible damage when using spikes and other sharp decoupling devices so that sound integrity is not lost. The parabolic shape of the cup centers the point, and reduces the likelihood of the point leaving the cup. Tendercups are available in black or silver anodized finish and are the same physical dimensions as small tenderfeet. They add less than 1/2 inch of height to the installation.

 

Description
Retail
Silver Tendercup $12.95 
35 mm Dia. - Accepts points of all spiked feet to protect floors - maintains single point contact  
Black Tendercups $15.95 
35 mm Dia. - Accepts points of all spiked feet to protect floors - maintains single point contact  

 

Spike Feet

Spike Feet 1
Spike Feet I - This kit uses surface-mounted, circular, black, threaded steel mounting plates to secure the spikes. Kit includes eight 6mm black spikes, nuts, surface mounting plates and mounting screws

 

 

 

Spike Feet II
Spike Feet II - This kit uses solid brass flush-mounted inserts to secure the spikes. A brad-point cabinet maker's drill bit is supplied with each kit. The drill bit produces perfect flat-bottom holes, without tearing up veneers or laminates. A 1/2 inch deep hole is first drilled to accept the brass insert, which is then pounded in with a hammer. The installed insert then sits flush with the surface. Finally a spike and locknut are screwed into each insert, the speaker is leveled and the locknuts tightened.

 

 

 

Description
Retail
Spike Feet I $39.95 
Kit includes eight 6mm black spikes, nuts flush mounting plate and mounting screws  
Spike Feet II $39.95 
Kit includes eight 6mm black spikes, nuts and brass inserts. Brad point drill and drill stop included.  
6mm Spikes and nuts only (not shown) $29.95 
Eight 6mm black spikes and lock nuts to replace lost or damaged spikes. Fits most European stands and speakers.  
 
   

OEM quantities of spike nuts and inserts are available on request.

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