Avalon M5 Mono Mic Preamp

Avalon microphone preamplifiers have been in use around the world since 1986. All preamplifiers share the combined technologies of low ratio transformer balanced inputs coupled with high-voltage cascade FET twin bipolar discrete class A amplifiers.

-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


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)
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).

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