Chameleon Labs 500 Series 581 Class AB Microphone Preamp  

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The Chameleon Labs Model 581 is a discrete Class AB 500 series microphone preamplifier module, with an extraordinary sonic signature at an amazing price point. Its clarity and incredibly solid low end... Read More

Available 12-14-2015 You will not be charged until order ships. Email me when this is in stock.

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The Chameleon Labs Model 581 is a discrete Class AB 500 series microphone preamplifier module, with an extraordinary sonic signature at an amazing price point. Its clarity and incredibly solid low end is reminiscent of renowned classic designs. Rich, warm, and musical, the 581 provides detailed results by employing classic circuit design, polystyrene capacitors, hand selected components and custom wound transformers, Chameleon Labs ensures that the Model 581 will exhibit classic audio sound. It is also designed to comply with any 500 series powered chassis approved by the API VPR Alliance

  • Discrete Class AB Circuit
  • API 500 series compatible card
  • Powered by CPS-501 Powered Chassis or any 500 series compatible power supply
  • Fully balanced transformer mic input, which can be upgraded to a vintage style Carnhill unit
  • Transformer balanced output
  • 300 Ohms or 1.2K Ohms mic input selector
  • 48VDC phantom power selector
  • Hi-Z Direct Input for instruments on the front panel
  • Output level control functions as a fader when going straight to D.A.W. or tape
  • LED illuminated push buttons for visual confirmation
  • LED Metering (Power, Signal, +4dB, Peak)
  • Microphone Input Impedance: 300Ω or 1,200Ω
  • Microphone Amplifier Gain: +25 dB to +80 dB in 5 dB steps
  • Output Impedance: 100Ω Noise: -115.5 dB
  • Maximum Output: +26 dB into 600Ω
  • Frequency Response: 20Hz - 20 kHz +/- 1 dB.
  • Weight: 2.8lb.
  • Dimensions (WxHxD): 1.5" x 5.25"
  • Depth to Rear of Mounting Surface: 5.938" =/- 0.02"
  • Power Requirements: +/- 16 V @ ≤ 130 ma, +48 V @ 5 ma
  • One-year warranty

Pro Coverage gives you added warranty protection for your new gear. Stepping in where the manufacturer's "normal wear and tear" coverage ends, our Pro Coverage program offers you upgraded coverage if your product ever fails Read More.

Pro Coverage includes
  • Accidental damage protection (new gear only)
  • Expedited repair
  • Free shipping (for returns or repairs)
  • 100% coverage for commercial use
  • Extended return period
  • Extended price protection
  • No lemon guarantee
  • Free transfer of coverage to a new owner
  • Repair costs covered for up to three years from date of purchase
  • Repair authorization-toll-free by phone or via the web
  • Customer Reviews

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(based on 1 review)

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Reviewed by 1 customer

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Chameleon Labs 581


from Los Angeles, CA

Site Member

After a long wait, I received my revised blackface Chameleon Labs 581 and put it through its paces. I was eager to compare it to other Neve inspired pieces in my studio, and see how a mix comes together using just the 581. My most direct comparison was to the Heritage Audio 73JR, which quickly won me over and has been my go to preamp. I noticed right away that the 73JR has a more grinding and open saturation, with extended bottom end, and a very pronounced upper midrange saturation. When the 73JR is pushed, it gets beefy, and also has more upper midrange to it. The Class A/B 581 doesn't share the extended low end content of it's Neve inspired Class A competition, the 581 is tighter and handles the bottom end transients with excellent clarity. The upper mids aren't as in your face, but more reserved, yet still very defined. The more you push the 581, the more it's silky texture is brought to life, and it shows its rich harmonics without losing clarity; slightly increasing the bottom end, and bringing an edge to the highs, yet still retaining a tight and focused sound. Switching back to the 73JR, you get a more open feel, and the sounds are bigger, but not better - just different. In my experience, the 73JR can definitely be too much of a good thing, and lead to the signature Neve cloudiness in the low frequency transients when used on every track, but the 581 will provide detail where the 73JR might contribute to said cloudiness. Overall, they compliment each other very very well. I can see myself using the 581 more and more, specially on high track counts.

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