Avalon V55 Manual 

100% discrete, Pure Class A, high-voltage signal amplifiers in all audio paths for maximum dynamic range and +30dB operating headroom. Hi-Z, 10,000,000 ohm Instrument DI inut for invisible “Zero-Loading”. Wide range, premium, low-ratio microphone input transformer. Dual impedance selector for ribbon, dynamic and powered microphones. Passive TONE BANK™ for custom filtering and unique tone shaping. Hi-Cut passive FILTER for eliminating unwanted high frequency buzz. High performance, fully isolated transformer for RE-AMPING functions. Wide range, professional VU meter with custom scale -30dB to +18dB. Dual color, LED meters for 0dB and +20dB fast PEAK signal capture. High power personal headphone monitor output. High-current, DC coupled output drivers for deep and controlled bass. Sealed, silver contact relay switching for all audio routing and bypass. Precision, gold plated, switched gain control for accurate 2dB steps. Low noise, AC toroid and discrete high-voltage linear DC power supply. AVA L O N D E S I G N - P U R E C L A S S A V55 HIGH-VOLTAGE DI-RE-PREAMPLIFIER The Avalon V55 DI-RE-MIC PREAMPLIFIER is an ultra high performance, professional, dual channel preamplifier, instrument DI and RE-AMP. Created for maximum versatility, the V55’s sonic signature of “Deep and Controlled Bass, Musical Mid-range and enhanced Vocal Projection” combine with a unique “ten point” passive TONE BANK™, high-cut buzz filter, large wide-range analog VU meter and long-life quality construction...The V55 will capture every magical performance and continues Avalon’s passion and commitment to Sonic Excellence !

TO CHANGE AC VOLTAGE: Carefully flip the voltage/fuse panel open, remove the RED volatge/fuse card and rotate to indicate correct AC voltage through rear voltage display window. Close plastic cover flap and press closed to lock. BOOST control: Boosts gain in 2dB steps for ALL inputs. AVALON V55 OPERATING INSTRUCTIONS LINE INSTRUMENT - DI MICROPHONE Hi-Z MICROPHONE Lo-Z -2dB to +38dB +2dB to +42dB +20dB to +60dB +26dB to +66dB Input Gain Range Input PAD and maximum input level with PAD engaged SIGNAL LED: PHASE REV switch: INSTRUMENT & DI input: PAD switch: The blue SIGNAL LED illuminates when the PEAK output reaches 0dB and red when the PEAK signal is +20dB. The REV switch reverses the output polarity for ALL outputs including the transformer ISOLATED (instrument) RE-AMP. The front mounted TRS jacks accept all active or passive unbalanced inputs. Input impedance is 10,000,000 ohms. Maximum input of +28dB or +38dB with the PAD. The PAD switch adds a resistive attenuator to ALL inputs. AVA L O N D E S I G N - P U R E C L A S S A LINE INSTRUMENT - DI MICROPHONE Hi-Z MICROPHONE Lo-Z -13dB PAD +45dB -10dB PAD +38dB -13dB PAD +23dB -15dB PAD +19dB 2 1 9 10 11 1 2 3 4 5 5 6 7 8 3 4

+6 -24 10 0dB 100 1kHz 10k 20k +6 -24 10 0dB 100 1kHz 10k 20k +6 -24 10 0dB 100 1kHz 10k 20k +6 -24 10 0dB 100 1kHz 10k 20k 1 acoustic and string instruments, electric bass and keyboards 2 electric bass guitar and mid scoop 3 acoustics, strings, electric and bass guitar and keyboards 4 acoustics, strings electric and bass guitar and keyboards 5 acoustic and electric instruments 6 electric and bass guitar +6 -24 10 0dB 100 1kHz 10k 20k +6 -24 -6 -6 -6 -6 -6 -6 10 0dB 100 1kHz 10k 20k +6 -24 10 0dB 100 1kHz 10k 20k vocals and instruments, high pass, rumble filter 50Hz @ 6dB/octave -6 +6 -24 10 0dB 100 1kHz 10k 20k vocals and instruments, high pass, rumble filter 90Hz @ 6dB/octave -6 +6 -24 10 0dB 100 1kHz 10k 20k +6 -24 10 0dB 100 1kHz 10k 20k -6 -6 AIR-LIFT vocals, acoustic-electric instruments AIR-LIFT & LOW-CUT vocals, acoustic- electric instruments AVA L O N D E S I G N - P U R E C L A S S A The V55 TONE-FILTERS offer a wide range of “passive” tones & voices for improved clarity, problem solving filters and music enhancement. TONE selections 1 through 6 are identical to the TONE-BANK™ options in the Avalon U5 “Ultra-Five” Direct Box-preamplifier.

AC input EARTH lift LINE out THRU out ISO out LINE input PHONES out MIC input 1 3 4 2 AC VOLTAGE SELECTOR. Select for either 115v or 230v. FUSE 5mm slow blow type : 115v = 0.2A, 230v=0.1A. Switch isolates chassis ground from audio signal gound, UP position is LIFTED. Dual TRS Jack and XLR BALANCED outputs, DC coupled, high-current, 600 ohm, +30dB maximum. THRU output is BUFFERED from Instrument DI input located on front panel. Ideal for amplifier inputs or tuners. The ISOLATED (RE-AMP) output is transformer isolated via the TRS jack. Signal is UNBALANCED +12dB maximum. XLR BALANCED and TRS (balanced) jack line input, transformer isolated, +45dB maximum input, pin 2=hot. Headphone TRS jack 0.5W maximum 600 ohms. XLR BALANCED microphone input, transformer isolated, +23dB maximum input, pin 2=hot. 1 4 3 5 8 6 7 2 AVA L O N D E S I G N - P U R E C L A S S A 5 6 7 8

DC DC DC DISCRETE CLASS A AMPLIFIER DISCRETE CLASS A AMPLIFIER DISCRETE CLASS A AMPLIFIER -2dB ~ ~ +36dB LINE +2dB ~ +42dB INST / DI +20dB ~ +60dB MIC HI-Z +26dB ~ +66dB MIC LO-Z +26dB ~ +66dB MIC +48v INPUT GAIN RANGE PAD IN PHASE REV TONE ON SIGNAL VU METER HI IN 2 LINE 1 1 21 1 21 1 10 MIC HI-Z INST / DI 3 MIC LO-Z 4 MIC LO-Z +48v 5 +48v +36v -36v +15v -15v +12v +36v -36v +48v +36v INPUT MODE BOOST T TONE BANK THRU OUT LINE IN AC INPUT ISOLATED OUT TO AMP LINE OUTPUT PHONES OUT RED 0dB +20dB OUTPUT SIGNAL TO ALL RELAY’S OUTPUT LEVEL VU BLUE PHANTOM -15dB -10dB MIC LINE HI-Z LO-Z MIC/LINE INSTRUMENT OUTPUT TRANSFORMER POLARITY REVERSE TONE BYPASS PASSIVE FILTER BUFFERED OUTPUT PASSIVE FILTER-TONE HF CUT BYPASS IN -13dB -20dB -18dB Avalon reserves the right to incorporate changes in design and in the specifications of this product without prior notice. Avalon Design is a division of Avalon Industries, Inc. © 2019. www: avalondesign.com POWER RED +48V ON SOFT START FUSE INPUT TRANSFORMER AC FILTER TRANSFORMER EARTH LIFT 115v-230v REGULATED DC POWER SUPPLIES +15v + - -15v LOG & PEAK VU METER LED DRIVER TO INPUT MODE AVALON DESIGN Burbank, California U.S.A. MICROPHONE IN INSTRUMENT IN V55

Gain range: Line : -2dB ~ +38dB Instrument : +2dB ~ +42dB Microphone Hi-Z : +20dB ~ +60dB Microphone Lo-Z : +26dB ~ +66dB PAD (passive input attenuator) Phantom power Input - Output connectors Maximum LINE output level Maximum ISOLATED output level Headphone output Noise 22Hz-22kHz unweighted Distortion THD, IMD Frequency response, +/-0.5dB Frequency response, -3dB VU meter Signal LED High cut filter Tone selector Polarity reverse AC power Fuse Dimensions Weight 100% discrete, high-voltage, Class A Gain switched in 2dB steps, +/-0.2dB Transformer balanced, 9,000 ohms Unbalanced, 10,000,000 ohms Transformer balanced, 6,600 ohms Transformer balanced, 1,800 ohms Line -13dB, Instrument -10dB, Mic -15dB +48v regulated, 10mA XLR, pin 2 hot, all jacks TRS (tip = hot) +30dBu, DC coupled, balanced 600 ohms +12dBu, transformer isolated, unbalanced 0.5W, 600 ohm load -98dBu typical, minimum gain (-128dB EIN) 0.05% at +10dBu, 0.5% at +30dBu 2Hz to 20kHz 2Hz to 500kHz (internal band limited) Professional, wide range -30dB ~ +18dB LED peak capture blue 0dB, red +20dB -3dB at 3.7kHz, minimum phase design 10 passive filter-tone selections All outputs (relay switched) Internal toroidal AC supply 115v~230v REAR selectable, 50/60Hz, 0.5A, 35w max. 19 x 3.5 x 12 in (483 x 88 x 305mm) 24lbs (10.9kg) Avalon reserves the right to incorporate changes in design and in the specifications of this product without prior notice. AVALON DESIGN 3417 W. Burbank Blvd., Burbank, California 91505 U.S.A. Tel: 949-492-2000 www.avalondesign.com Avalon Design is a division of Avalon Industries, Inc. © 2019. S PEC I FI C AT I O NS V55 HIGH VOLTAGE DI-RE-PREAMPLIFIER