128 Steps Stepped Attenuator

128 Steps Stepped Attenuator 

Stereo version - U$99
Balanced stereo version - U$129 

• Constant input impedance 128 steps stepped attenuator (2014 version 8 special edition)
• Logarithmic smooth volume steps 
• Bundled with full aluminum remote control
• Fully assembled and tested module
• Relays - Panasonic Japan, brand new, including all components
• Volume / channel settings - memorized even if power is disconnected  
• Relays are digitally micro-controller controlled

Instructions/functions

• On/off, volume up/down, mute, channel switching, and etc
• Long pole digital switch / decoder - rotate left/right for volume, short press for channel switching, long press for power on/off (needs a separately power on/off module)
• Logic control board can be separated with the display board, attenuator board can be separated with the channel switching board, both being connected by interconnect wires (flexible)
• AC 12V supply, 4 relays for 4 channel switching, 7 relays for 128 steps volume control, with 0.5dB steps, totalling to 63.5dB attenuation
• Display board (with the logic control) - 100mm x 32mm.
• Attenuator board - 100mm x 36mm
• Signal switching board - 55mm x 36mm

Q&A

Q: Does it have noise or AC hum?
A: It has been optimized several times. No noise or AC hum.

Q: Is the attenuation smooth?
A: Yes, with LOG scale and 0.5dB steps, absolutely smooth transitions

Q: Does it have pops?
A: Due to the mechanical configuration, there is 1 step with a very short and minor pop, which is absolutely acceptable. 

Q: Is the relay good?
A: Yes. It is imported from Japan high quality TQ2 relays.

Q: Is the remote control good?
A: Yes. The touch and feel are excellent.

Note: We can do a fully built preamp if you wish. Email us for various available options.