Avalon M5 Microphone Preamp

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Product Code: 9999-00203
Avalon M5
Availability: Currently On Order, Stock Arriving 09-01-19

Avalon M5 Microphone Preamp

The Avalon M5 Microphone Preamp is designed to optimize absolute signal integrity and musical performance. Combines an advanced transformer input stage with twin high performance Class A amplifiers, the Avalon M5 is ideal for vocal and acoustic instruments.

The Avalon M5 Pure Class A microphone preamplifier is the most musical, low noise full function preamplifier available today. Avalon microphone preamplifiers have been in use around the world since 1986. As a basis of design, Avalon preamplifiers share the combined technologies of low ratio transformer balanced inputs coupled with high-voltage cascade FET twin bipolar discrete class A amplifiers.


Designed to optimize absolute signal integrity and musical performance, the M5 combines an advanced transformer input stage with twin high performance Class A cascode FET and bipolar discrete amplifiers for sonic excellence unequaled by lesser designs. The M5 is ideal for vocal and acoustic instruments, active DI input for the direct recording of bass, guitars and keyboards.

Features include state-of-the-art, balanced 100% discrete, Pure Class A signal amplifiers, practical user features and rugged hardware designed to deliver true high performance audio for many years.


Avalon preamplifiers have been in use since 1986. They have found their way into the world's most famous lead vocalists recording sessions and studios and been featured on thousands of the best selling (and sounding) albums and live performances.


Avalon's advanced true symmetry design offers high-voltage, large headroom, extended bandwidth and very low noise. The use of 100% discrete, Pure Class A signal amplifiers give the serious music professional unlimited sonic character and a natural harmonic detail that enhances the program material and becomes one with the music itself.


The M5 microphone preamplifier is the first choice when you are looking to capture a full bodied, dynamic, musical performance from the intimate depths within the artist. The M5 will make your recordings musical masterpieces!

Avalon M5 Microphone Preamp Features

  • Pure Class A, 100% discrete design
  • Smooth musical detail and sonic excellence
  • Minimum audio signal path
  • High performance input transformer
  • Microphone and Hi-Z inputs to +36dB
  • Very low noise -126dB
  • High headroom +30dB
  • Gain switched in 2dB steps to +64dB
  • DC coupled Pure Class A output
  • Large illuminated professional VU meter
  • Twin LED peak signal indicators
  • Regulated +48v phantom power supply
  • Low distortion less than 0.5% THD and IMD
  • Variable passive high pass (bass cut) filter
  • All signal routing with sealed silver relays

Avalon M5 Microphone Preamp Specifications

  • Circuit Topology: Twin cascode FET and bipolar low level input signal stages. High-voltage, 100% discrete, symmetrical high-bias Pure Class A amplifiers.
  • Input Type and Load: Superior transformer, balanced low-ratio 1500 ohm input load.
  • Maximum Mic Level: +36dB balanced XLR pin 2 hot (with -20dB passive attenuator).
  • Maximum Instrument Level: +30dB balanced 600 ohms, DC coupled, discrete Class A.
  • Input Attenuator: -20dB resistive pre transformer primary, sealed silver relay.
  • Phantom Power: +48v regulated 50mA capability, sealed silver relay.
  • High Pass Filter: Passive, variable from 30Hz to 185Hz @ 6dB per octave, sealed silver relay.
  • Polarity Reverse: Sealed silver relay on microphone input.
  • Gain Range Input: +20dB to +64dB in 2dB steps.
  • Maximum Output Level: +30dB unbalanced 600 ohms, DC coupled, discrete symmetrical Pure Class A.
  • Output Type: XLR connector, pin 2 hot (optional balanced JT-1 transformer).
  • Noise EIN Unweighted: -126dB 150 ohm.
  • Noise 20kHz Unweighted: -100dB
  • Distortion THD, IMD: 0.05% nominal
  • Frequency Response -3dB: 1Hz to 120kHz transformer limit.
  • System Bandwidth: DC to 1MHz
  • Output Meter: High quality, illuminated analog VU meter 0dB = +4dB.
  • Peak Meter: Bi-color LED's 0dB and +20dB peak detection circuit.
  • M5 Dimensions: 8.5 x 3.5 x 12 in (216 x 88 x 305mm) half rack width.
  • Weight: 15lbs (6.8kg)
  • Dimensions of Shipping Carton: 24 x 21.5 x 7.5 in (610 x 546 x 190mm)
  • Weight-Packed: 25lbs (11.4kg) includes B2T power supply and cables.
  • AC power supply B2T:
    • External toroidal 100V to 240V, 50-60Hz selectable
    • 150 watts maximum
  • Cables: 1 x 8ft 4 pin ac cable, 1 x 8ft standard IEC cable included.
  • Dimensions: 5 x 7 x 3.25 in (127 x 177 x 83mm)
  • Weight: 7lbs (3.2kg)

Avalon M5 Microphone Preamp Includes

  • AC power supply B2T:
    • External toroidal 100V to 240V, 50-60Hz selectable
    • 150 watts maximum
  • Cables:
    • 1 x 8ft 4 pin ac cable
    • 1 x 8ft standard IEC cable
  • Optional Rack Mount Kits:
  • Rack mount kit (1) RM-1: Single M5 19 inch rack mount kit (holds one half rack unit).
  • Rack mount kit (2) RM-2: Dual M5 19 inch rack mount kit (holds two half rack units).

Avalon M5 Microphone Preamp Downloads

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1 Review Hide Reviews Show Reviews

  • 4
    Detailed, open, tight

    Posted by Leo Wolfe on May 18th 2012

    I have a pair of these. They are my go-to preamps when I want to capture every detail in a performance. They're extremely dimensional and have a TON of clean gain if you're using dynamic or ribbon mics. They tend to be very open so if you're using a condenser in a room that doesn't sound so hot you may want to look elsewhere. They also have an obvious solid-state distortion if pushed too hard (the stock model doesn't have an output transformer so you may have to increase levels post A/D to avoid overdriving the preamp on occasion - but they're so clean and open this is never a problem for me in a mix). At this price I do wish they shipped with the output transformer installed. That's the only reason I gave 4 stars and not 5.