VTL TL5.5 Series II Signature Owner's Manual
VTL
TL5.5 Series II Signature Preamplifier
O w n e r ’ s M a n u a l
MAKING TUBES USER FRIENDLY
VTL TL5.5 Series II Signature Preamplifier
Information in this document is subject to change without notice. No part of this document may be reproduced or
transmitted in any form or by any means, electronic or mechanical, for any purpose, without the express written
permission by VTL.
Version History:
Version 2.0 May 19, 2010
Part Number: OM-6.5
Copyright © 2011 by VTL Amplifiers Inc. All rights reserved.
4774 Murrieta Street, Suite 10
Chino, CA 91710, USA
Phone 909.627.5944 • Fax 909.627.6988
Email: mail@vtl.com • http://www.vtl.com/
Table of Contents
Chapter 1..............................................................................................................................................................................1
Introduction...................................................................................................................................................................1
Symbol Conventions used in this guide.....................................................................................................................2
Electrical Safety Notice..............................................................................................................................................2
Water and Moisture ....................................................................................................................................................3
Location and Ventilation............................................................................................................................................3
Servicing.....................................................................................................................................................................3
Operational Warnings.................................................................................................................................................4
Chapter 2..............................................................................................................................................................................5
Getting Started..............................................................................................................................................................5
Unpacking the TL5.5 from its box.............................................................................................................................5
Quick Start..................................................................................................................................................................6
TL5.5 Front Panel Controls........................................................................................................................................7
The Preamplifier’s Back Panel................................................................................................................................10
Back Panel Connections and controls............................................................................................................. 10
The Remote Control Hand-held Unit...................................................................................................................... 11
Fitting the Batteries to the Remote Control..................................................................................................... 12
Voltage Setting ........................................................................................................................................................ 13
Power Source for the VTL TL-5.5 Preamplifier..................................................................................................... 13
Connecting the Preamplifier to your system........................................................................................................... 14
Connecting to a Turntable............................................................................................................................... 14
Select and Connect Source Components......................................................................................................... 14
Connecting to a Turntable............................................................................................................................... 15
Connecting the TL5.5 to a Home Theater System.................................................................................................. 16
Using the TL-5.5 to trigger other devices............................................................................................................... 16
Chapter 3........................................................................................................................................................................... 18
Operating the Preamplifier....................................................................................................................................... 18
Powering your preamplifier and the rest of your system on................................................................................... 18
Ground Loop Hum................................................................................................................................................... 19
Using the Preamplifier with the Remote Control.................................................................................................... 19
Using the Tape Loop to monitor recordings........................................................................................................... 20
Connecting to the Turntable.................................................................................................................................... 21
Operating Modes and Factory Default Settings...................................................................................................... 21
Quick Reference: Special Programming Functions................................................................................................ 22
LED Indications....................................................................................................................................................... 23
Programming the Preamplifier’s function controls................................................................................................. 25
Using the preamplifier with RS232 control.................................................................................................... 35
Powering the system off.......................................................................................................................................... 39
chapter 4............................................................................................................................................................................ 41
Care and Maintenance of your VTL preamplifier................................................................................................. 41
Break In Period........................................................................................................................................................ 41
Tube Life.................................................................................................................................................................. 41
Changing Tubes....................................................................................................................................................... 41
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Changing the Main Fuses.........................................................................................................................................44
Internal View of TL5.5 II Line Stage ......................................................................................................................45
Internal View of TL5.5 II Line and Phono Stage....................................................................................................45
Internal View of TL5.5 II Phono Stage ...................................................................................................................46
Cleaning....................................................................................................................................................................46
Troubleshooting .......................................................................................................................................................46
chapter 5 ............................................................................................................................................................................49
TL-5.5II Specifications ..............................................................................................................................................49
Chapter 6............................................................................................................................................................................51
Warranty.....................................................................................................................................................................51
Appendix............................................................................................................................................................................53
Warranty Registration ..............................................................................................................................................53
Service Notes............................................................................................................................................................53
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CHAPTER 1
Introduction
Congratulations on your purchase of a VTL Signature Preamplifier: “A new single-chassis preamplifier
design to challenge all others.”
his hand crafted component is designed to deliver superb performance for your
listening pleasure for many years to come. In order to get the most benefit from your
purchase, we recommend that you take sufficient time to get familiar with the features
T
of this product. Please take a moment to read through this owner’s manual, as it
contains all of the installation procedures needed to connect your new TL5.5 to the rest of your
audio system, as well as the many functions that the TL5.5 can perform. After you have
finished reading this manual it should be kept it in a safe place for future reference.
Since its introduction in 1997, the TL-5.5 has earned a reputation for outstanding
performance at an economical price. Now, VTL has significantly upgraded this preamp,
using many of the technological innovations derived from the flagship TL-7.5
preamplifier. The result is a modern full-featured preamplifier – the TL5.5 Series II
Preamplifier that outperforms in every way, making it one of the top values of any tube
preamplifier in its category.
The fundamental qualities that made the original TL-5.5 special—its all-tube design, the
optional retrofittable phono stage, and its superb sonic characteristics—are unchanged.
What’s new is the application of advanced audio technology sourced from VTL’s TL-7.5
Reference and TL-6.5 Signature preamplifiers. This technology uses a simple circuit
topology with low negative feedback and a high current/low impedance output stage in a
low-noise microprocessor-based design. Top quality parts, fully balanced operation, and
precision-regulated and shielded power supplies yield a full yet neutral sound with high
resolution, transparency, speed and powerful dynamics.
Preamplifiers offer the user many benefits that direct connections cannot. A line stage with gain
(and therefore dynamic headroom) always yields superior sound in dynamic musical passages.
Ease of installation is another primary benefit with preamplifiers.
The VTL TL5.5 Signature Line preamplifier is both a fully active line level preamplifier and a
complete source control center in one package, and it offers complete predictability of
performance with little or no change of response in a wide range of systems and environments.
VTL has delivered on its goal of bringing advanced engineering and modern
functionality to the new TL-5.5 Series II preamplifier. With the same highly intuitive
user interface of the renowned TL-7.5 and 6.5, and a full-function remote, the new
TL-5.5 is a pleasure to use. A rigid, well-shielded chassis yields quiet operation while bidirectional RS-232 serial interface allows for seamless integration into any audio
system. A luxurious cosmetic makeover includes a sleek and visually striking precisionmilled faceplate similar to those used on its much more expensive brethren. For a well-
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priced, high-performance all-tube preamplifier, the TL-5.5 is a truly fine addition to any
system.
The VTL team is proud that you have selected our Signature preamplifier as a new member of
your home audio system. This preamplifier is designed to give you the convenience and
flexibility to manage all your audio and video sources, while at the same time giving you the
musical experience that is the most alive and the truest to your source, and we certainly wish
you many hours of enjoyment from it.
Symbol Conv entions used in this guide
Certain symbols are used in this owner’s manual to draw your attention to important
points being discussed. For your own safety and that of your equipment you should
note and heed the warnings that follow these symbols.
The “Warning - Pay particular Attention” symbol used is
And the “Warning – Observe These Precautions for Your Safety” is
Electrical Safety Notice
Electrical voltage from power cables can be hazardous. We recommend that the power
cord used with this unit be connected to a properly grounded AC outlet. There are
hazardous voltages present in the unit, and to prevent electrical shock, do not remove the
cover of this preamplifier, and under no circumstances while the unit is powered on.
Warning – Under no circumstances should any attempt be made to
circumvent the ground system to the AC line for any reason
ground lifted system can be potentially extremely dangerous, both to persons that might
come in contact with the unit, and to the unit itself, and proper RF shielding cannot be
attained without a secure ground connection.
Damage to the unit that is the result of improper AC connection and grounding will not be
covered under the warranty.
Prior to connecting this preamplifier to any audio or video equipment in your system,
make sure this unit’s power (and the rest of the equipment connected to its input and
output channels) is turned off. Adding or removing input or output cables to the
preamplifier while the system is powered on can cause damage to the preamplifier and
possibly also to the rest of the system.
. Using a
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Water and Moisture
The TL5.5 should be kept away from sources of water or
moisture. If liquid enters the unit it must be immediately
returned to your dealer for servicing. In this case you should
under no circumstances try to power the unit on - there are
hazardous voltages present in this unit that can cause serious injury if they come in
contact with you.
Location and V entilation
Warning – To avoid risk of failure due to overheating, do not stack
components
The TL5.5 chassis emits heat and needs proper ventilation to ensure long
operational life. Under no circumstances should the TL5.5 SERIES II be
stacked on top of any other unit.
Ensure that the TL5.5 SERIES II is installed in a location that is
stable and well ventilated. If the preamplifier is placed in a built-in
installation, ensure that there is adequate room for air to flow through
the ventilation openings. Allow at least 3 - 5 inches clearance on the
top and around the sides of each chassis of the preamplifier. The warranty does not cover
units that are damaged due to overheating from incorrect installation.
It is also recommended that the preamplifier be sited at least 10 inches away from the
power amplifier to prevent possible noise introduction into the system.
Tiptoes or other isolation accessories may prove useful in reducing mechanical vibrations
or other external vibrations that might affect sonic performance, and we have found that
such accessories can offer definite beneficial sonic improvements when used correctly. In
all cases this preamplifier should only be installed in a location that is stable, as warranty
does not cover damage due to the unit falling.
Do not place the preamplifier next to heat sources such as radiators, stoves or other
appliances.
Do not place the preamplifier where small children might be able to tamper with the
equipment. If it is not possible to place the preamplifier out of the reach of small children
it is recommended that power cables be removed when the equipment is not in use.
Servicing
Do not attempt to service the TL5.5 beyond the procedures described in this manual.
For all other service and questions, please contact your authorized VTL dealer or the
factory.
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Operational Warnings
It is critical for proper sonic performance of this
component that it be properly configured for the mode
of operation while playing. If a balanced signal is
applied to the inputs the unit must be configured for
balanced operation, and vice-versa.
Always make all connections before powering the TL5.5 on.
Connecting or disconnecting the TL5.5 while powered on
can damage the output stage, and will not be covered under
the warranty. Ensure that no interconnect cables can become
loose during use and that there are no intermittent faults or
shorts with the cables.
Do not attempt to disassemble the TL5.5 chassis or
remove any covers from the unit. Always consult with your
VTL authorized dealer or the VTL factory before attempting
any service work on any VTL unit.
Do not touch the tubes after the TL5.5 is turned on. The
tubes can get very hot while the TL5.5 is operating. Turn off the
TL5.5 and allow the tubes to cool down before attempting to
work with the tubes.
Tube components can be heavy and awkward to lift, with the
weight unevenly distributed, and you should not attempt to move
the unit without help. The TL5.5 Preamplifier weighs approximately
40 lbs. (18.14 Kg).
Do not exceed fuse ratings or attempt to bypass any fuses, as
this can cause an extremely hazardous condition and will void
any warrantees. Use only the same type and rating of fuses as
specified in the owners’ manual and marked on the
unit.
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CHAPTER 2
Getting Started
Unpacking the TL5.5 from its box
1. The VTL TL5.5 Preamplifier is shipped in 1
carton and the unit is wrapped in thick plastic.
The plastic is not strong enough to support the
unit, and may tear if you try to lift the unit out of the box with it. Also
there are protruding switches and connectors which could break if the unit
is not properly handled, and in addition to the awkward, unbalanced heavy
load the unit has sharp edges and a cleaning polish on it, which makes it
slippery and hard to grasp.
2. When lifting the unit, be sure to only lift it from the bottom of the unit
with both hands. Be careful not to break any switches or to rest the unit on
any other side than the bottom side on the four feet on a stable surface.
Setting it on any other side may damage protruding components.
SAVE THE CARTON AND ALL PACKAGING FOR ANY FUTURE
SHIPMENT OF THE TL5.5.
After you open the carton you should find the following items inside:
• The preamplifier
• 1 standard power cord for the electrical system in your country
• The remote control hand-held unit with two AAA batteries
• This Owner’s Manual, Quick Reference Sheet, VTL Quality Assurance and test
printout, and a VTL product warranty registration card
Remove each item from its packaging material and check to make sure that no physical
damage has occurred during shipment of the unit. There should be no rattles inside either
the preamplifier chassis or remote control units. Look through the vent slots and check to
see that the tubes appear properly seated in their sockets. Contact your VTL dealer
immediately if physical damage is detected.
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Quick Start
As the proud owner of this new VTL TL5.5 Signature preamplifier, you are probably
eager at this moment to connect the new preamplifier into your system and hear what
it sounds like. This section is a quick setup-up guide to help you get started in the
shortest time possible. Once the preamplifier is in your system and operational, please
take the time to read the rest of the information in this manual. It will give you the indepth perspective into all the functions your preamplifier is capable of delivering and
how to take advantage of the many special programming functions designed to give
you the maximum performance and flexibility.
Step 1: Finding a location for the TL5.5 Preamplifier
We recommend that you place the TL5.5 preamplifier in a location closer to your
source components, such as your CD player, turntable, or DVD player. Note that the
TL5.5 should not be stacked on top of anything else. Reserve sufficient space to either
put the unit on its own shelf with at least 6 inches of space above it for ventilation.
Step 2: Connect the TL5.5 Preamplifier to the AC outlet
Make sure that the Power Rocker switch on the back of the unit is not turned on. Locate
the IEC power cord that came with your TL5.5 preamplifier, and connect one end of
the power cord to the back of the unit and the other side of the power cord to the AC
outlet on the wall.
Step 3: Connect a Source to the Preamplifier
Make sure the source is turned off, connect the source that you use most frequently, e.g. your
CD player, to the CD or AUX1 input locations in the back panel of the unit. If your CD player
has balanced out, connect the cable from the balanced output of your CD player to the CD
balanced input of your TL5.5 preamplifier, matching the left and right channels. Make sure that
you are using the appropriate balanced input cables.
If your CD player uses single-ended outputs, connect the cable from the single-ended output of
your CD player to the CD or AUX1 single-ended input of your TL5.5 preamplifier, matching
the left and right channels. The single-ended input for CD or AUX1 is located immediately to
the right of the XLR connector.
Step 4: Connect your Power Amplifier to the Preamplifier
Make sure your Power Amplifier is turned off. If your power amplifier supports balanced input
and you have balanced interconnects, connect the preamplifier’s balanced output to the power
amplifier’s balanced input, with the right output from the preamplifier going to the right input
of the amplifier and the left output of the preamplifier to the left input of the amplifier.
If you are connecting to your power amplifier using single-ended interconnects, connect one of
the preamplifier’s RCA/single-ended outputs to the amplifier’s single-ended input, making sure
the left channel of the preamplifier is connected to the left channel of the amplifier and vice
versa. The single-ended output is located to the left of the balanced output connector.
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Step 5. Turn on the TL5.5 Preamplifier
Locate the Power Rocker switch at the back of the unit. Turn the switch to the “on” position.
You should see two blue “--“ displayed in the unit’s Numeric Display window.
Locate the red Power button on the front panel of the unit located on the far left side of the
Preamplifier. Push the power button to turn on the Preamplifier. You will see the blue Power
on LED above the red Power button start to blink and the Numeric Display now displays the
90 to 0 warm-up countdown sequence.
Step 6. Turn on your Source component
Step 7. Turn on your Power Amplifier(s)
Step 8. Wait for the TL5.5 preamplifier to finish warmup
After the TL5.5’s warm-up countdown is completed, the Power on LED turns to a steady blue
indicating that the unit is now ready to play. Please note that the Numeric Display now
indicates 00 volume. CD is the selected source and the LED above CD is blue to indicate that
the default selection of CD is in balanced mode. If your Source component is setup in balanced
mode, you are now ready to play your music. Turn the volume to the appropriate level by
rotating the Volume/Control knob.
If your Source component is used in single-ended mode, change the CD input to single-ended
by holding down the CD button until the LED changes to green. Start playing your music and
turn the volume to the appropriate level by rotating the Volume/Control knob.
Congratulations! Your TL-5.5 Preamplifier is now beginning its break-in period. Now
please read the rest of this manual while relaxing and listening to your favorite music.
TL5.5 Front Panel Controls
From the front panel of the unit you can access all of the controls and program all the
functions of the preamplifier. All functions can also be accessed and programmed from
the rear-mounted RS-232 serial port, either via a central remote control system or simply
from a computer with serial capabilities.
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You can operate the various controls and buttons from the front panel to access the full
functionality of this unit, and the operational functionality can also be accessed via the
remote control. The indication LEDs show the various operating modes of the unit.
1. The Power button is used to turn the preamplifier on and off. If the unit is powered off
press the button to turn the preamplifier ON and press the button down again to turn
the unit OFF. The Power LED will blink blue during warmup, remain on steady blue
after power up, and turn off during power off or standby.
2. The Input Select buttons are used to select the source component for the preamplifier.
Any of the inputs can be selected by pressing the appropriate selector button labeled
with the selection of your choice. The input selectors are grouped by function: The
first two from left to right can be configured as either balanced or single ended inputs.
During power up these two buttons also double as trigger programming buttons
(when not in locked mode).
If triggers are programmed the first two input LEDs flash red during power up to
indicate trigger functions, and these two inputs can also be set for balanced (blue) or
single ended (green) operation.
The third input from the left is marked Ph/Aux2, and can be selected as either an
RIAA equalized phono input (if a phono card is installed in the unit), or as the input
that an external phono stage is connected to, or as a regular line input if there is no
phono stage. This input and the following four are single ended inputs only, and are
not used for any other function. The LED color is permanently green.
Warning It is critical for proper sonic performance of this component that it be
properly configured for the type of connection and mode of operation: If a
balanced signal is applied to the input that input
must be configured for balanced
operation, and vice-versa.
3. The Tape input is also usable as a normal (single ended only) input, with the additional
capability of handling the record monitor function. LED color is green for input, and
red for monitor.
4. The Mon/Proc button is used to monitor the output when recording, and allows the
Tape input to be routed to the preamplifier output while the selected input is routed to
the Record out, to monitor the recording at the desired volume level while keeping the
selected input connected to the Record Out at a fixed level.
The Mon/Proc button is also used to set any input for unity gain
mode). This function
is used for routing an external surround processor to the front left
(when not in locked
and right channels. In this mode, your external surround processor will control the levels of
all of the channels of your system, including the front left and right channels. In this mode
the preamplifier is in the unity gain mode, and the volume control is set to a fixed position
(equivalent to volume position 69 in single ended mode). The signal is passed to the front
left and right amplifiers through the gain stage of the preamplifier, but at the same volume
as the surround processor is putting out, and the preamplifier’s volume control is disabled.
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5. The display window contains the group of three main operational buttons and display
LEDs, the numeric display, and the infra-red remote receiver, which enables the
transmission of signal from the remote hand-held unit to be received by the
preamplifier. Keep this window clear from any obstruction and out of direct light to
allow maximum signal transmission from the remote wand.
The three main operational buttons are:-
a) The Phase button allows you to switch the system into the phase reversed state.
• Pressing the Phase button toggles the system between the Phase 0 and Phase
180 (inverted) states. The Phase LED will turn off when the system is in Phase
0 state, and will be steady red in the phase inverted state.
b) The Balance button allows the user to change the channel balance setting between
left and right channel.
• Select the Balance button changes the display to the balance display and sets
the Balance LED to blue. While the display is indicating “—“, turn the rotary
knob changes balance from left to right, according to the direction of
rotation. In this mode the control knob is used to set the left and right
channel level.
In the Balance mode, when the display shows a double dash this indicates that
the left and right channels are equally balanced. A number with a bar on either
side indicates an out of balance setting, with the bar indicating the direction of
balance and the display indicating the degree of out of balance.
The display automatically reverts to volume readout a few seconds after
release of the Balance button.
c) The Mute button is to allow the user to switch the preamplifier into the muted
state.
Pressing the button toggles the system between the muted and operating
states. If the preamplifier is currently in the operating state, pressing the
Mute button will set the unit to the muted state, indicated by a flashing red
Mute LED. If the preamplifier is currently in mute state, pressing the Mute
button will change the system into the operating state, and the LED will
turn off.
The Numeric display is used to indicate either the sequential countdown timer during
power-up, offset level of the selected input, channel balance offset, trigger timing
during trigger output programming (during power up only), and the overall volume
gain level setting.
6. The Control knob is used in conjunction with the Numeric Display for setting volume
gain level in the operate mode, or when in one of the programming modes (trigger
programming, channel balance setting or input offset programming mode) the control
knob is used to dial in the appropriate setting.
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• When in volume control mode the control knob changes the loudness level
of the output from your speaker system. Turning the knob clockwise
increases the volume level, and turning the knob counter-clockwise decrease s
the volume level.
The Preamplifier’ s Back Panel
From the back panel of the chassis you can access the power connector, trigger outputs,
RS-232 port, AC fuse, and the serial number and power consumption of the unit, as well
as all of the audio inputs and outputs.
Fig. 2 Rear Panel
Back Panel Connections and controls
The Power Receptacle is used for connecting the TL5.5 to the AC power from a wall outlet
using the power cord.
The Main Fuse Holder contains the main power fuse. CAUTION: Replace fuses only
with fuses of same type and rating.
The Power Rocker powers the unit into standby mode. Press up for on and down for off.
The Trigger Outputs provide a 12V DC signal to external components that are to remotely
power up after the preamplifier is operational. Connect the power amplifiers’ trigger inputs
to the TL5.5’s Trigger Outputs to remotely power the amplifier(s) on and off.
The Information label contains Serial number, AC voltage setting and power consumption
information.
The RCA and XLR Input Jacks.
2 pairs of single-ended/balanced line inputs to connect source components to the
preamplifier section of the TL5.5, including CD, Aux 1.
5 single-ended RCA inputs Ph/Aux 2, Aux 3, Tuner, Aux 4 and Aux 5
1 pair of single ended RCA Tape input
The RCA and XLR Output Jacks.
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1 pairs single ended and 1 pair balanced Main Outputs
1 pair of fixed single ended buffered record out
The Remote Control Hand-held Unit
The Remote Control hand held unit supplied with this preamplifier allows the user to
perform the following functions:
• Power the preamplifier on and off. This is a toggle control, which changes the
state from one to the other each time it is pressed.
• Set the left and right channel balance offset
• Select any of the 8 inputs directly
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Fig 3. Remote Control Unit
11
• Set the preamp between phase inverting and phase correct mode by pressing
the phase button. This is a toggle control, which changes the state from one
to the other each time it is pressed.
• Increase/decrease the volume by pressing the up and down buttons
respectively on the remote control hand-held unit.
• Set/reset the system in mute and operating modes by pressing the mute
button on the remote control hand-held unit. This is a toggle control, which
changes the state from one to the other each time it is pressed.
If the system is in mute, pressing the volume up button to increase the
volume will reset the system and put it into operating mode. The volume
down button will not impact the mute state.
• Set the volume down from a higher volume to 20 by pressing the Fade button
When the user first presses any of the buttons on the remote control unit, there
may be a short delay before the preamplifier completes the processing of the
signal sent by the remote, especially if the line of sight to the preamp is not clear,
or if there is any sort of light interference with the infra red signal. The
preamplifier will not respond to pressing two buttons at one time, and will only
accept the first signal received.
In addition, the remote wand can be used to program another universal remote
that can be used in place of or in addition to the supplied remote wand. There are
additional discrete remote codes available that are programmed into the
preamplifier to replace the three toggle commands that are used on the supplied
remote wand: Power on, Power off, Mute on, Mute off, phase correct and phase
invert. These codes are either accessed from inside the supplied remote wand by
your dealer’s installer, or the codes can be sent separately to your dealer in files
specially formatted for programming either a Crestron, AMX or Pronto external
remote system.
There is also a separate RS-232 port on the back of the preamplifier’s chassis that
can accept any of the commands required to control the preamplifier remotely,
and outputs messages as the front panel controls on the TL5.5 SERIES II are
changed. This RS-232 port can be used for a central remote command system.
Fitting the Batteries to the Remote Control
1. Two Phillips head screws hold the back cover on the remote control.
Remove all screws with the correct tool to avoid damaging them (using #1
Phillips head screwdriver), and put them aside for later re-installation.
2. Turn the remote control over so that the cover drops into your other hand,
and put the cover aside with the screws. Be careful of the inside edges of
the remote, as they can be sharp.
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3. Locate the battery holder and insert two AAA batteries in the marked
positions, + to + and - to -.
4. Being careful not to damage the cover of the remote shell, replace the back
cover and snap it into its exact position. Replace the mounting screws, being
careful not to over-tighten them, and the cover will settle into place.
Test the remote control functions and ensure that all the functions are working correctly.
If the functions are not working then check that the batteries are in the correct mounting
positions and that they are not stale. If you still encounter problems then you should
contact the factory or your VTL dealer.
V oltage Setting
Your VTL TL5.5 preamplifier has already been set to the correct voltage for your country
where you made your purchase, and the voltage setting is marked on the Serial Number Badge
located on the back panel of your TL5.5.
Caution: Check to make sure that the voltage setting on your TL5.5 is
correct for your local voltage rating before plugging in and turning on
your TL5.5.
Po wer Source for the VTL TL-5.5 Preamplifier
Your TL-5.5 Preamplifier is a high-performance component, capable of extremely high
resolution and sonic performance. To assure best conditions for optimal results, plug the unit
directly into a wall AC outlet. Do not plug your TL-5.5 into a light extension cord or into the
back of another component, as this will starve the TL-5.5 of current and significantly impact
the performance of your system.
See the chapter on Specifications for the power consumption requirements of your TL-5.5.
Using the supplied power cable, connect the preamplifier to the AC line. For electrical
safety, ensure that the AC connector fits securely both to the AC line and to the
preamplifier, as a loose connection could cause intermittent operation and may damage the
unit.
Warning: Under no circumstances should any attempt be made to circumvent
the ground system to the AC line for any reason.
be potentially extremely dangerous, both to persons that might come in contact with the
unit, and to the unit itself, and proper RF shielding cannot be attained without a secure
ground connection.
Damage to the unit that is the result of improper AC connection or grounding will not be
covered under the warranty.
Using a ground lifted system can
TL5.5 SERIES II Preamplifier Owner’s Manual
VTL
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