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Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

Preamp MA24 Finished, photo's
Preamp MA24 Finished, photo's
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Old 29th June 2020, 01:44 PM   #1
PieterPiet is offline PieterPiet  Netherlands
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Join Date: May 2016
Location: Europe
Default Preamp MA24 Finished, photo's

Outline of my pre-amp: Maya R2R volume controller/ 4 input selector, with display and with constant 10K output impedance. After the volume controller, I use the AMB Alpha 24 line amp, powered by AMB Sigma 25 / 26 PSU's with AMB Sigma 78 / 79 low noise regulators. Chassis, the Modushop slimline U3 (120mm height/4.7").

As I have plenty of space left inside the chassis, I will later integrate the AMB M3 headphone amplifier in my preamp with variable gain (2-17).

My preamp matches nicely with my Beta 24 power amp and my Music Streamer (Audiolinux OS+HQ-Player). Here are a number photo's, enjoy! Changes in sound quality with this preamp are almost non-detectable for me. It may be that the SQ is a bit brighter compared to the preamp part of my RME ADI-2 Dac.

More info and photo's on my build can be found here: AMB Laboratories DIY Audio Forums • View topic - α24 with M3 preamp built log&Q's
Attached Images
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Old 30th June 2020, 07:40 PM   #2
zei is offline zei  Sweden
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Join Date: Feb 2005
Location: Gothenburg, Sweden
Very nice build Pieter!
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Old 2nd July 2020, 09:09 AM   #3
maxw is offline maxw  United Kingdom
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Join Date: Jun 2004
Location: Berlin
Looks great
 

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