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For Sale: M³ headphone amplifier w/ LCDuino-1 system

post #1 of 3
Thread Starter 
This Classified is Closed

For Sale:
M³ headphone amplifier w/ LCDuino-1 system

Will Ship To: Anywhere

 

Up for sale is my M³ headphone amplifier with the LCDuino-1 system. The system includes relay-based attenuation and input/output selection. This system has been running for two years with no problems.


Some relevant specifications:
- Gain set to 2x (may increase to 8x)
- AD825 opamps
- 256 steps of attenuation (-128dB to 0dB in 0.5dB increments)
- 4x RCA inputs (rear)
- 2x 1/4" outputs (front)
- 1x RCA preamp output (rear)
- Remote control (uses Sony protocol)
- Transformers + SSR in separate black enclosure (6" x 8" x 3") with 4' umbilical cord
- σ11 at 30V inside main amplifier enclosure
- Main enclosure is black Par-Metal 20-series, 12" x 12" x 3"

Opamps are easily accessible. Note with the 30V supply, the AD8610 cannot be used, as its maximum rated voltage is 26V (±13V).

The case has been through a couple of previous projects, but is still rock solid.

In the photos, the M³ is the device underneath the device (DAC) in the first photo. A pushbutton is on the rear, and functions as a setup button (when powering up), power button, and mute button.


Edited by ShinyFalcon - 3/27/14 at 11:49am
post #2 of 3
I'll be back if your M^3 is $600 or below. I got roughly $375 for a YBM built dual enclosure M^3. These amps have no value.
post #3 of 3
Quote:
Originally Posted by vampire5003 View Post

I'll be back if your M^3 is $600 or below. I got roughly $375 for a YBM built dual enclosure M^3. These amps have no value.

 

Just to be fair, this M3 herein has LCDuino-1 system (which is a nice remote volume control), 256 steps of volume attenuation and multiple inputs and outputs. The YBM one you refered to does not. We should not compare apples to oranges. 


Edited by zzffnn - 9/12/13 at 10:28am
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