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INTRODUCTION:
The VM1, Variable Mode, Vacuum Tube Amplifier provides
Direct-Drive amplification for (1or2) True-Ribbon, Open
Baffle (SR1) Headphones or (1or2) True-Ribbon Circum-Aural
(CA1) Headphones.
VM-1a
Paired with our SR1 or CA1 headphones, the VM1 is what
RAAL-requisite offers as the current pinnacle of personal
listening performance.
VARIABLE MODE, VACUUM TUBE
Reassuringly Traditional, Excitedly Original
RIBBON HEADPHONE AMPLIFIER
It has long been our belief that, within the audio spectrum,
USER MANUAL
ribbons are the ideal transducer and vacuum tubes are the
ideal amplifier.
Having such strong opinions regarding
ribbons and tubes, there is little mystery as to why we
pursued such an amplifier.
Having Strong Opinions Is One Thing
Living Up To Them Is Another...
In order to directly drive True-Ribbon headphones, which
(relative to conventional headphones) exhibit extremely low
impedance (0.2Ω) and extremely high current requirements,
a vacuum tube platform would require a blend of traditional
vacuum tube technology/techniques along with fresh,
exocorrugate thinking.
In addition, Variable Mode Select brings powerful
performance flexibility for synergistic matching of system and
source.
We sincerely appreciate your trust in our work, as evidenced
by your purchase, and hope you will benefit by a lifetime of
beautiful music and joyful ownership.
Cheers & Happy Listening,
Alex Radisavljevic
Danny McKinney
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Table of Contents
Related Manuals for RAAL-requisite VM-1a
Summary of Contents for RAAL-requisite VM-1a
- Page 1 Baffle (SR1) Headphones or (1or2) True-Ribbon Circum-Aural (CA1) Headphones. VM-1a Paired with our SR1 or CA1 headphones, the VM1 is what RAAL-requisite offers as the current pinnacle of personal listening performance. VARIABLE MODE, VACUUM TUBE Reassuringly Traditional, Excitedly Original RIBBON HEADPHONE AMPLIFIER...
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Page 2: What's In The Box
What’s In The Box: Variable Mode Select: VM-1a Vacuum Tube Amplifier CAUTION: EL34 Matched Quartet Output Tubes DO NOT change modes when amplifier is on. EL34 Matched Duet Driver/Splitter Tubes Always turn amp off before changing modes. 6SN7 Input Preamplifier Tube Power Cable - 115VAC (North America) ULTRA-LINEAR •... - Page 3 Tube #6 (Front Row, Center) 6SN7 is the recommended input tube for nearly all applications. The VM-1a ships with the 6SN7 as standard equipment from our shop. In rare cases, where source output level from a DAC, phono preamp, etc…...
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Page 4: Front Panel Features
Front Panel Features: (left to right) 1) POWER SWITCH (illuminated): 4) RIBBON HEADPHONES 2: ON (UP) - OFF (DOWN) This output is only active when RH OUTPUTS 1+2 is selected. It can be used for either SR1 or CA1 Ribbon 2) RH (Ribbon Headphone) OUTPUTS: Headphones 1 Selects Ribbon Output XLR 1... - Page 5 Rear Panel Connections: (left to right) Type to enter text 1) IEC POWER INLET: 4) TRANSFORMER BALANCED INPUT: Standard IEC connector 3-pin Female XLR (Right & Left) Pin-1 Ground 2) FUSE HOLDER: Pin-2 Positive Going Phase 3A SB for 115V mains operation 1.6A SB for 230V mains operation Pin-3 Negative Going Phase 3A SB for100V (Japan) mains operation...
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Page 6: Specifications
SPECIFICATIONS: Input Impedance: 50k Ohms Input Sensitivity: 2V Load impedance: 0.2 - 0.4 Ohm U.S.A. Output Power: Ultra-Linear 15-Watts Danny McKinney Triode 10-Watts danny@raalrequisite.com Pentode 20-Watts Tel: 818-437-0779 Frequency Response: Ultra-Linear 20Hz - 70kHz 2175 Goodyear Avenue Triode 10Hz - 70kHz Suite 110 Pentode 30Hz - 50kHz Ventura, California 93003... -
Page 7: Limited 1-Year Warranty
EQUIPMENT AND PROPERTY. This warranty is only made to the original purchaser and is not transferable. In the event of failure of a product under this warranty, RAAL-requisite will Customer Responsibilities: repair, at no charge, the product returned to its factory. RAAL-requisite may, at its option, replace the product in lieu of repair. - Page 8 Safety Safety cont... To prevent electric shock, do not use the plug with an extension cord, receptacle, or outlet unless blades can be fully inserted. Refer all servicing to qualified service personnel. Service is required when the device has been damaged, including cord or plug If you don’t know how to install audio devices, damage, liquid has been spilled or objects get a qualified professional to help.
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