RAAL requisite VM-1a is a vacuum tube amplifier designed for high-performing personal audio. Offering three selectable modes including ultra-linear, triode, and pentode, it optimizes the user's listening experience based on genre and preference. The amplifier effortlessly drives True-Ribbon headphones, including the SR1 and CA1 models, with its powerful 15 to 20 watts of output. It features balanced XLR inputs, multiple headphone outputs, and a 24-step precision attenuator for precise volume control. The VM-1a promises an immersive and transformative audio experience for discerning listeners.
RAAL requisite VM-1a is a vacuum tube amplifier designed for high-performing personal audio. Offering three selectable modes including ultra-linear, triode, and pentode, it optimizes the user's listening experience based on genre and preference. The amplifier effortlessly drives True-Ribbon headphones, including the SR1 and CA1 models, with its powerful 15 to 20 watts of output. It features balanced XLR inputs, multiple headphone outputs, and a 24-step precision attenuator for precise volume control. The VM-1a promises an immersive and transformative audio experience for discerning listeners.
INTRODUCTION:
VM-1a
USER MANUAL
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.
Paired with our SR1 or CA1 headphones, the VM1 is what
RAAL-requisite offers as the current pinnacle of personal
listening performance.
Reassuringly Traditional, Excitedly Original
It has long been our belief that, within the audio spectrum,
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
VARIABLE MODE, VACUUM TUBE
RIBBON HEADPHONE AMPLIFIER
VM-1a Vacuum Tube Amplifier
EL34 Matched Quartet Output Tubes
EL34 Matched Duet Driver/Splitter Tubes
6SN7 Input Preamplifier Tube
Power Cable - 115VAC (North America)
All other regions; User provided - locally sourced
User Selectable Mains Voltage: 115VAC, 3A Slo-Blo Fuse,
IEC cable provided (North America).
User Selectable Mains Voltage: 230VAC, 1.6A Slo-Blo Fuse,
User provided local IEC cable.
Internally Set 100VAC Mains (Japan): 3A Slo-Blo Fuse,
User provided local IEC cable.
BEFORE TURNING AMP ON FOR THE FIRST TIME
Be sure to check that the mains voltage selector
switch is set to correct mains voltage position for
your location. The switch is located on the rear
panel, next to IEC power inlet.
Fuse value will differ depending on mains voltage.
115V requires 3A Slo-Blo 230V requires 1.6A Slo-Blo
1)"
What’s In The Box:
Power Requirements:
Tube Installation & Replacement:
Variable Mode Select:
CAUTION:
DO NOT change modes when amplifier is on.
Always turn amp off before changing modes.
CAUTION:
CAUTION:
KEY-PIN on TUBES
MUST ALIGN with KEY-PIN on SOCKETS
ULTRA-LINEAR • Higher power, lower
distortion than Triode. 15 watts.
TRIODE • Relaxed and smooth. Excellent
choice for acoustic music. 10 watts.
PENTODE • Ideal for Rock, Pop, Dance,
Progressive Styles, etc… 20 watts
SOCKET
1234
57
6SN7 (LOW GAIN)
6SL7 (HI GAIN)
MATCHED QUARTET
MATCHED DUET
6
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…
is unusually low, the higher gain 6SL7 is a suitable substitute.
TUBE to SOCKET, KEY-PIN ALIGNMENT
MUST BE OBSERVED WHEN
INSTALLING or REPLACING TUBES
EL34
EL34
EL34
EL34
EL34
EL34
1) POWER SWITCH (illuminated):
ON (UP) - OFF (DOWN)
2) RH (Ribbon Headphone) OUTPUTS:
1 Selects Ribbon Output XLR 1
1+2 Selects Ribbon Output XLR 1 & 2
VM-1 can drive 2 SR1 or 2 CA1 Ribbon Headphones
3) RIBBON HEADPHONES 1:
This XLR output is always active. It can be used for
either SR1 or CA1 Ribbon Headphones
4) RIBBON HEADPHONES 2:
This output is only active when RH OUTPUTS 1+2 is
selected. It can be used for either SR1 or CA1 Ribbon
Headphones
5) RIBBON TYPE:
SR engages Open-Baffle Compensation to both outputs
CA removes OB Compensation from both outputs
6) VOLUME:
24-Step Precision Attenuator. Maintains solid left/right
balance, in all positions.
Front Panel Features: (left to right)
1) IEC POWER INLET:
Standard IEC connector
2) FUSE HOLDER:
3A SB for 115V mains operation
1.6A SB for 230V mains operation
3A SB for100V (Japan) mains operation
100V requires internal jumper connection
3) VOLTAGE SELECT:
115V or 230V
4) TRANSFORMER BALANCED INPUT:
3-pin Female XLR (Right & Left)
Pin-1 Ground
"Pin-2 Positive Going Phase
"Pin-3 Negative Going Phase
Type to enter text
Rear Panel Connections: (left to right)
SPECIFICATIONS:
Input Impedance: 50k Ohms
Input Sensitivity: 2V
Load impedance: 0.2 - 0.4 Ohm
Output Power:
"Ultra-Linear 15-Watts
Triode 10-Watts
"Pentode 20-Watts
Frequency Response:
"Ultra-Linear 20Hz - 70kHz
Triode 10Hz - 70kHz
"Pentode 30Hz - 50kHz
Distortion: < 1% THD
Signal to noise: better than 72dB
Input Connectors: 3pin XLR (female) Transformer Balanced
"Pin-1 Ground
"Pin-2 Positive Going Phase
"Pin-3 Negative Going Phase
Output connectors: 4-pin XLR (male)
"Pin-1 Right (+)
"Pin-2 Right (-)
"Pin-3 Left (-)
"Pin-4 Left (+)
Working voltage: 115V/230VAC (selector switch)
" " 100V (requires internal connection)
Power Consumption: Idle 160-Watts, Full Output 200-Watts
Dimensions: H 190mm x W 218mm x D 320mm
" H 7.50 in x W 8.60 in x D 12.60 in
Net Weight: 10Kg / 22 lbs. Shipping Weight: 13Kg / 29 lbs.
Europe
Aleksandar Radisavljevic
Tel: +381 64 144 1111
Djordja Simeonovica 4
19000 Zajecar
Serbia
U.S.A.
Danny McKinney
danny@raalrequisite.com
Tel: 818-437-0779
2175 Goodyear Avenue
Suite 110
Ventura, California 93003
RAAL-requisite warrants its products to be free from defects in material and
workmanship under normal use and service for a period of ONE (1) year
from the date of delivery.
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
repair, at no charge, the product returned to its factory. RAAL-requisite may,
at its option, replace the product in lieu of repair. If the failure has been
caused by misuse, neglect, accident or abnormal operating conditions,
repairs will be billed at the normal shop rate. In such cases, an estimate will
be submitted before work is started, if requested by the customer.
ALL OTHER WARRANTIES ARE HEREBY DISCLAIMED.
This warranty does not cover:
normal wear and tear or normal aging of the product;
tubes are covered by a 90-day warranty;
3. cosmetic damage, including but not limited to scratches and dents;
4. damage through accident, abuse, neglect, misuse, natural events, or other
external causes;
5. damage through misapplication, overloading, or improper usage;
6. damage due to improper maintenance and repair;
7. damage as a result from the shipping and handling by third parties; or
8. product alterations.
Limitation of Liability:
EXCEPT AS PROVIDED IN THIS WARRANTY AND TO THE MAXIMUM
EXTENT PERMITTED BY LAW, RAAL-REQUISITE IS NOT RESPONSIBLE FOR
ANY DIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR INJURIES
RESULTING FROM ANY BREACH OF WARRANTY OR CONDITION,
INCLUDING BUT NOT LIMITED TO LOSS OF USE; LOSS OF REVENUE;
Limited 1-year Warranty cont...
Limited 1-Year Warranty
LOSS OF ACTUAL OR ANTICIPATED PROFITS; LOSS OF BUSINESS; LOSS
OF OPPORTUNITY; LOSS OF GOODWILL; LOSS OF REPUTATION; OR
ANY DIRECT OR INDIRECT OR CONSEQUENTIAL LOSS OR DAMAGE
WHATSOEVER CAUSED INCLUDING THE REPLACEMENT OF
EQUIPMENT AND PROPERTY.
Customer Responsibilities:
Customers may be required to provide proof of purchase date, respond to
questions designed to assist with diagnosing potential issues and follow
RAAL-requisite’s directions to make a claim on your warranty. DO NOT
OPEN THE PRODUCT. OPENING THE PRODUCT MAY VOID YOUR
WARRANTY. To make a warranty claim:
1. Contact us either through:
phone: (818) 437-0779
email: danny@raalrequisite.com
office: 2175 Goodyear Ave, STE 110. Ventura CA. 93003-7761
RAAL-requisite's Responsibilities:
1. We will try to assist you in operating or repairing your product.
2. If we determine a replacement part is necessary, we will send you a free
replacement part.
3. If we determine a replacement will not resolve your problem, we may ask
you to return your product to our warehouse. Upon receiving the product at
our warehouse, RAAL-requisite will inspect the product.
4. If we determine that the product has a manufacturing defect we will send
you a replacement part. If replacement of the part or repair of the unit is
not possible, RAAL-requisite will send you a replacement product.
If you don’t know how to install audio devices,
get a qualified professional to help.
Never use this device near water, and clean
only with a dry cloth.
Assure adequate ventilation, do not block any
ventilation openings, or place near heat
sources.
Use only the supplied power cord or suitable
replacement. Route cords away from traffic
areas and protect them from being pinched.
Unplug the cord from the outlet if the
apparatus is unused for a long period of time.
Safety
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
damage, liquid has been spilled or objects
have fallen into the device, the device has
been exposed to rain or moisture,
does not operate normally, or has been
dropped.
WARNING:
TO REDUCE THE RISK OF FIRE OR
ELECTRIC SHOCK, DO NOT EXPOSE
THIS DEVICE TO RAIN OR MOISTURE.
Safety cont...
-
1
-
2
-
3
-
4
-
5
-
6
-
7
-
8
RAAL requisite VM-1a is a vacuum tube amplifier designed for high-performing personal audio. Offering three selectable modes including ultra-linear, triode, and pentode, it optimizes the user's listening experience based on genre and preference. The amplifier effortlessly drives True-Ribbon headphones, including the SR1 and CA1 models, with its powerful 15 to 20 watts of output. It features balanced XLR inputs, multiple headphone outputs, and a 24-step precision attenuator for precise volume control. The VM-1a promises an immersive and transformative audio experience for discerning listeners.
Ask a question and I''ll find the answer in the document
Finding information in a document is now easier with AI
Other documents
-
Genz Benz El diablo 60-C Owner's manual
-
Genz-Benz El diablo 60-C User manual
-
BackLine Engineering ZENTONE 7 User manual
-
Mesa/Boogie 2:Fifty User manual
-
Analog Metric EL34 SE V User manual
-
Cary Audio Design SLI-50 Owner's manual
-
-
VHT Amplification Classic User manual
-
-
Manley Neo-Classic 250W Monoblock User manual
