Elma A4 Audio Rotary Switch Series Type SMT 20k Thin-Film Audio Resistors 4 Wafers

The A4 is a individual customizable audio rotary switch which offers a huge range of rotary switches in series or ladder type attenuator configuration.

The High-End Elma rotary switch is developed with a PCB based switch contact system that is specifically designed to meet audiophile requirements for super sonic performance. All switches feature Elma´s hallmark indexing feel for outstanding tactile feedback and feel with a possible torque from 1.5 to 15Ncm. Selectable end stop. You can choose between horizontal PCB or vertical switch design and a THT version without pre-soldered resistors or the SMT version with pre-soldered high-precision low-noise thin-film resistors with input impedance options 10k, 25k, 50k oder 100k Ohm. The series A4 attenuators are available up to 8 channels and the ladder type attenuators up to 4 channels. The A4 switch can be assembled with resistors up to 3.6mm diameter for the ladder type switch. This rotary switch is also available as concentric version. We offer customized THT version with custom selected resistors - If you need any custom solution, please contact us.

Features

• Selector switches, series and ladder type attenuators
• Exceptional sonic clarity, smooth and precise switch feel
• Low-bounce contacts with 3 micron gold plating
• Motorized versions available (see Remote Audio PLUS)
• Customized tapers
• Concentric Version available
• For high-end home audio, mixing console and Cinema

Torque standard
up to 2 Wafers 1,5Ncm
from 3-4 Wafers 2,5Ncm
from 4 Wafers 5Ncm
Please contact us, if you need individual torque values.

On the following pictures you can see a concentric design arrangement of the A4 switch. Please contact us if you are interested in a concentric version.



Announced maximum resistor diameter for the A4 is: 0.7/3.6/10 mm