Audiovalve Prometheus 100 Instructions Manual

_____________________________________ This handcrafted product was special made for your high demands, to display the music on its finest way. We guarantee that this amplifier was carefully produced and tested in all details. rev. nov. 2017 _____________________________________________________________________

Congratulations on your decision to become the proud owner of the AUDIO-VALVE Prometheus power amplifier. This manual has been prepared to help you understand the operation of your amplifier and to provide some information about its design and the variety of ways it may be used. We have designed and manufactured this amplifier to faithfully and accurately reproduce music. This hand build instrument should give a lifetime of pleasure and with a little care and a full understanding of the operation recommendation in this manual the Prometheus should provide trouble free performance. List of contents - Warning and precautions - Front panel - rear panel - Drawing front panel - Drawing rear panel - Input - output terminals - Polarity - phasing - Installation and operation - Automatic bias control ( ABR ) - Specifications - misc.

WARNING This amplifier Prometheus operates in class - A and is therefore capable of generating a moderately high temperatue which requires careful placing to aviod any effect this heat may have on other equipment, furniture and fittings etc. Do not remove the top cover from this ampllifier. Hazardous voltages are present. Any repair work should be referered to a suitable qualified and experienced service person. Do not attempt to connect any input of this amplifier to any of its outputs. Do not earth any output terminal or connect any of these terminals together without following the instructions in this manual or seeking qualified assistance. Do not place this amplifier in any position where liquids or any foreign material may accidentally enter it. Do not disconnect any in / output wire, while the amplifier is operating. Do not connect any voltage source short circut, earth / ground or appliance (other than suitable HiFi quality loudspeakers ) to any output terminal. Some preamplifiers, proccesors, CD players etc produce large switching pulses when switched on, causing a loud click through the loudspeakers. For this reason, turn on all other equipment in your system and operate the Stand - by mode of the amplifier before turning on the Prometheus. Note: the Prometheus power amplifier do not cause this problem.

FRONTPANEL The front panel of the Prometheus power amplifier incorporates with a small panel filled with two switches. These switches control the day to day function of the amplifier. The operation of this two switches is like following: MAIN SWITCH ( right side ) This heavy duty rocker switch is at the right side of this panel and switched the mains / line power of the amplifier ON or OFF. The illuminated ( blue / red ) front logo show you the mode in what the amplifier works actual. When the logo shinning blue ( green ) , the amplifier is in OPERATION - MODE, when the logo shinning red - the amp is in the STAND - BY MODE. When you switch ON the amp - its not important what direction stay the STAND BY switch its time. An internal "automatic time delay" over 1 minutes spend after switch ON the amp at first the heating voltage for all tubes and after 1 min. the plate voltage too. You can watch its procedure on the illuminated front panel. At first start red shinning periode and after 1 min. change the light from red to blue and then the amp works. It is not good practice to repeatedly active this switch ON and OFF rapidly, same for the STAND - BY switch. STAND - BY SWITCH. This switch on the left of the front panel alters the mode between STAND BY or OPERATION of the amplifier. Switch up is OPERATION - mode ( you see the blue illuminated front logo ) and switch down is the STAND BY mode ( the front glass logo want be red illuminated ). When you switch ON the power main switch, its STAND BY switch can stay in position what want. Never leave your tube amp unobserved in Operation mode

REAR PANEL The facilities on the rear panel of the Prometheus may seem not so complex. The rear panel incorporates all of the terminals for connecting the input signals and the output signals to the loudspeaker. A reasonable understanding of this amplifier and the logical approach should ensure that you are listening to this amplifier in a very short space of time without any difficults at all. Please remember that the AUDIOVALVE Prometheus power amplifier is a high quality electronic instrument capable of an exceptional level of performance. Be sure that you are understanding your requirements fully before you make any connection to this amplifier. INPUT TERMINALS Input terminals for this Prometheus power amplifier are easily accessible and fitted to the lower centre area of the rear panel. RCA INPUT. These standard type of RCA terminals are for use with unbalanced signals from most sigal sources such as audio preamplifiers. IMPORTANT NOTE: When you use the RCA jacket, please short circuit the neg. phase on the XLR jacket to ground ( short circuit pin 1+3 with an wire or separate plug). The amp no like an open neg. input. XLR BALANCED INPUT. XLR connector fitted to the amplifier are for use with balanced line signals from audio preamplifiers etc. Balanced signals are carried via a three way cable that connects all three pins at each of the interconnect cable. Please note, the signal has now double level !!!! DO NOT operate this amplifier with both RCA and XLR cables connect at the same time.

OUTPUT TERMINALS Output connections for the Loudspeakers are provided on the lower centre of the rear panel. Two pairs of heavy duty , gold plated binding posts for each cannel are supplied. CONNECT your loudspeaker positive terminal to the amplifier (+) output terminal. Connect your loudspeaker negative terminal to the ( - ) output terminal. POLARITY - PHASING It is important to achieve good stereo imaging in your listening room. By observing the wiring constructions above, each power amplifier / loudspeaker combination should be in phase. If you experience a poor stereo image and / or a lack of bass, check that the loudspeaker wiring has been connnected correctly. We recommend that you use one of the easily obtainable "test - disc" to help you ensure both phasing and channel orientation are correct. If in doupt, consult your Audio Valve dealer for advice. Quality of the connections must be examined to ensure a high performance trouble free operation is enjoyed.Check that the connections are tight, but do not overtighten with excessive use of spanners etc. If bare wires are used, make sure that no loose strands of wire short across to the other terminals or the amplifier chassis. When using plugs such as Banana, be sure tu use good quality one`s with a firm fit. connecting recommendations for best match: Speakers between 4-8 ohm impedance please use the two lower speaker terminals - thats your prefered terminals. For loudspeaker more then 8 Ohm please use the top two speaker terminal

Please use the following terminals for connecting your loudspeakers: speakers with 4 – 8 Ohm use lower terminals speakers up to 8 – 16 Ohm use upper terminals When connecting your speakers, you have many options variable. You can change your speaker cables horizontally between the 8 or 4 ohm speaker terminals connect, but you can also use the speaker terminals diagonally to 6 ohm impedance tap off. The amplifier it does not matter what you use the speaker terminals. Use those that you deliver the best performance. Do not make any other connection to any of the amplifiers negative or positive output speaker terminals, all terminals have signal potentioal no like GROUNDING to other equipment.

INSTALLATION AND OPERATION MAINS VOLTAGE CHECK that the mains voltage on a sticker printed on the rear of this amplifier is similar to the mains voltage normaly supplied to your area. If in doubt, please consult your AUDIOVALVE dealer. PLACEMENT AND VENTILATION This Audio Valve Prometheus power amplifier is designed to operate at a moderately high temperature. The ideal location is on the rigid stand or floor mounted away from direct contact with any objects, materials or deep pile carpets which may be effected by the heat or which may interrupt the flow of air around the amplifier. When operating the amplifiers quite a lot of heat is generated which should be allowed to dissipate without restriction. Make sure that no objects are placed on the top of the amplifier. Always ensure adequate ventilations. MAINS / LINE POWER connection is via supplied plug-in lead. The standard IEC socket connects the mains power at the amplifier end while a local mains plug is required at the wall end. In the event where a "local" plug needs to be fitted to the wall end of the lead, ensure the at the plugs is wired correctly by a suitable qualified or experienced person. Ensure the main switch of the front of this amplifier is OFF before attempting any modification of the mains connection. MAINS / LINE FUSE ( 230VAC-3,15asb / 115VAC-6 asb ) A Mains / Line fuse is fitted within the IEC Mains / Line socket on the rear of the amplifier. A small draw at the bottom of this socket may be removed (after the IEC plug is removed) by levering it out with a flat blade screw driver. The fuse ( american type ) fitted should be razed at no greater than 6.3 ampere slow blow. In the unusual event that this fuse should blow, you must first establish the cause of this failure, cure the fault and then replace the fuse with one of the same type. DO NOT FIT A FUSE WITH HIGHER RATING.

AUTOMATIC BIAS CONTROL FUNCTION ( ABR ) AudioValve has a unique fully automatic Bias Regulator, which can adjust both the static quiescent current of the tubes, as well as the dynamic current at volume level Each power tube is controlled by an ABR. The correct function of the ABR is shown by LEDs, next to each power tube. When the amplifier is correct operating, no LED is shining. In case that any of the power tubes is faulty one of the red LEDs, which are together at the right side of the power tubes , immediatly indicated. If this happens, you have to change the power tube of this place. After changing the power tube, the LED must be off again. This model of amp have reversible electronical ( PTC ) use. When a power tube like to collapse, the automatic reversible fuse open and protect its place around the faulty power tube. Please notice: All handling at the open amplifier has to be done when the main power plug is disconnected . Work on the amplifier can only ever be done by the expert When the amplifier is driven in a very high level output, the ABRs are regulating the power tubes and there is sometimes a slighty pumping shining of the LEDs - thats a normal mode and show you the activity from the bias regulators

:: Specifications :: Power supply: 100 up to 250 VAC Power consumption: 200 VA Concept: PP Distortion: on 8 ohm load 0,15% - 1Khz ( 80 watt ) full dynamic automatic biasing for power tubes Power output max: 100 Watt ( 30 Veff on 8 ohms ) Damping: 5 Tubes: 1 * 12AX7, 1 * 12 AU7, 2 * GU50 Bandwidth: 10hz – 45khz S/N ratio: -70 dbm Gain: 25 db Inputs: RCA and XLR ( only + phase ) Input resistance: 47k Speaker terminals: 4 + 8 ohm Weight: 12 kg Size: 30 x 22 x 25 cm (WxDxH)

W A R R A N T Y AUDIOVALVE warrants its components for a three-year period on all electronics and a 90-day period on the tubes from the purchase date. In the event of a failure of your amplifier , AUDIOVALVE will repair or readjust this unit or , should the occasion arise , will replace it provided that all conditions stipulated in this warranty are met. In order to initiate service of any kind it is necessary to obtain distributor or dealer authorization prior to shipping the unit for service. Any of the following conditions shall void the warranty:  Operation not in accordance with this manual.  Abuse , accidental damage or unauthorized modifications , as determined by AUDIO VALVE or its agents exclusively.  Removal , defacing or falsifying of tne serial numbers.  Shipping without the original complete factory crates.

WARRANTY REGISTRATION Please fill out and return this warranty form to the US distributor within 15 days of the purchase date or use our online warranty register form by: www.audiovalve.de  MODEL : _______________________________________________  SERIAL NUMBER : _______________________________________  PURCHASE DATE : ______________________________________  AUTHORIZED AUDIO - VALVE DEALER:  PURCHASER`S NAME : ___________________________________  STREET ADDRESS : ______________________________________  CITY : __________________________________________________  ZIP / POSTAL CODE : _____________________________________ Send to : AudioValve Mr. Becker Dormannweg 48 B 34123 KASSEL - Germany [email protected]

CE – Confirmity Declaration Of Conformity declare under our sole responsibility that the product(s) Manufacturer: AudioValve, Germany, 34123 KASSEL, Umbachsweg 70, [email protected] to which this declaration relates is/are in conformi y with the requirements of the following directive(s) Product Name: PROMETHEUS – power mono blocks Product Type: Audio Amplifier Complies with Standards: LVD: 92/31/EEC, 93/68/EEC, & 73/23/EWG Safety: EN60065 EMC: EN55013, EN55020, EN55022, EN55103, EN61000-3-2, & EN61000-3-3