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INTRODUCTION
Congratulations on your purchase of the STEALTH ULTRA-LITE™ ™ Power Amplifier. The
STEALTH ULTRA-LITE™ ™ Power Amplifier was designed to provide a new level of power
amplifier performance. The STEALTH ULTRA-LITE™ Power Amplifier is based on both ISP
Technologies patented D-CAT (Dynamic Current Amplifier Technology) and the new Dynamic
Adaptive Amplifier Technology which is covered under patents pending. The STEALTH ULTRALITE™ is designed for use as a mono power amplifier to drive your guitar speaker cabinet with a
minimum load impedance of 4 ohms. The STEALTH ULTRA-LITE™ is powered from an external
laptop style switch mode power adaptor. The design provides excellent sonic performance for the
guitar rig with excellent clipping characteristics. Please read this manual carefully for a through
explanation of the STEALTH ULTRA-LITE™ Power Amplifier and its functions.
IMPORTANT SAFTEY INSTRUCTIONS
Please read the following very carefully before operating this unit
Read ALL instructions carefully before using this unit. Keep these instructions for future reference.
Heed all warnings and follow all instructions.
Do not use this unit near water, in the rain, or where there is moisture. If this warning is ignored a
serious electrical shock or death may occur.
Do not attempt to service this unit. No user serviceable parts inside. Refer servicing to qualified, ISP
approved personnel. Servicing is required when the unit is damaged in any way, such as power
adaptor is damaged, liquid has been spilled into the unit, the unit has been exposed to rain or
moisture, does not operate normally, or has been dropped.
Care should be taken to avoid spilling any foreign objects or liquid into this unit. Avoid exposure of
this equipment to dripping or splashing and ensure that no objects filled with liquid, such as vases,
are placed on the equipment.
Only use accessories or attachments that are specified by the manufacturer.
Failure to follow these instructions may void the warranty.
NO USER SERVICABLE PARTS INSIDE. REFER SERVICING TO
QUALIFIED ISP TECHNOLOGIES SERVICE PERSONNELL.
The lightning bolt triangle is used to alert the user to the risk of electric shock.
The exclamation point triangle is used to alert the user to important operating or
maintenance instructions.
POWER REQUIREMENTS
This unit requires the connection of the external AC Power Adaptor to a 120 volt AC outlet. Do
not attempt to connect this unit to any power source other than the one supplied with the
STEALTH ULTRA-LITE™ Power Amplifier. The STEALTH ULTRA-LITE™ Power Amplifier
will typically draw on the order of 1 amps of current off the AC line when in use.
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STEALTH ULTRA-LITE™ FRONT PANEL
1. VOLUME CONTROL
Controls the Volume of the STEALTH ULTRA-LITE™ .
2. BASS CONTROL
Controls the amount of Bass in the output of the STEALTH ULTRA-LITE™ .
Provides +/-10db of adjustment.
3. TREBLE CONTROL
Controls the amount of Treble in the output of the STEALTH ULTRA-LITE™ .
Provides +/-10db of adjustment.
4. POWER ON LED
Indicates the STEALTH ULTRA-LITE™ is powered ON.
STEALTH ULTRA-LITE™ REAR PANEL
1. OUTPUT SPEAKER CONNECTION
Speaker connection, connect ¼ speaker cord to external speaker. Use 4Ω, 8Ω or
16Ω loads.
2. INPUT CONNECTION
Connect input signal from Guitar pedals or preamplifier
3. EXTERNAL 19VDC POWER ADAPTOR CONNECTION
Connect external 19VDC Power Adaptor to this connection. CAUTION: USE ONLY THE
POWER ADAPTOR SUPPLIED WITH THE UNIT, OTHER POWER SOURCE MAY CAUSE
DAMAGE OR FAILURE OF THE UNIT.
If the STEALTH ULTRA-LITE™ is used on a pedal board the supplied rubber
feet can be mounted on the bottom of the unit.
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STEALTH ULTRA-LITE™ POWER AMPLIFIER
TECHNOLOGY
The STEALTH ULTRA-LITE™ Power Amplifier is based on a new Power Amplifier Technology
developed by ISP Technologies. The STEALTH ULTRA-LITE™ uses ISP Technologies
patented “Dynamic Current Amplifier Technology” (D-CAT) controlled by a new patent pending
“Adaptive Dynamic Amplifier Technology” which provides a novel Class H power amplifier
topology with improved efficiency and Dynamic Voltage Multiplication. This allows the
STEALTH ULTRA-LITE™ Power Amplifier to operate on a low voltage19 volt DC power
adaptor and provide extremely high output voltage swing well in excess of the 19 volts DC.
The graph below shows the output voltage waveform and adaptive power supply rails. At low
power the STEALTH ULTRA-LITE™ operates as a normal class A-B power amplifier. When
the output signal approaches the nominal 19 volt power supply rail, the Dynamic Adaptive
Amplifier Technology provides two functions: a dynamic multiplication or lifting of the power
supply rails and an adaptivly tracking power supply where the power supply rails will
continuously track the output signal within a fixed ratio. The net result is a class A-B power
amplifier with excellent sonic performance and very musical clipping charecteristics with greatly
increased power efficiency and higher output voltage swing.
STEALTH ULTRA-LITE™ POWER AMPLIFIER OPERATION
The STEALTH ULTRA-LITE™ power amplifer is designed to operate like any other power
amplifier with a line level input signal. The STEALTH ULTRA-LITE™ amplifier ships with an
external switch mode power adaptor, which connects to normal AC power. The supplied Power
Adaptor will operate between 100 VAC and 240VAC input and will connect to the STEALTH
ULTRA-LITE™ Power connector providing 19VDC @ 7.9 amps output power for the STEALTH
ULTRA-LITE™ . Do not attempt to power the STEALTH ULTRA-LITE™ with any other power
source than the one supplied from ISP Technologies. On power up, the STEALTH ULTRALITE™ will mute all outputs for a Turn On time of approximatly 4 seconds. If power is
removed, the STEALTH ULTRA-LITE™ will instantly mute the output before any audible pop
can occur. Connect the STEALTH ULTRA-LITE™ into your system as shown below for Mono
operation. For high power rigs multiple STEALTH ULTRA-LITE™ Power Amplifiers can be
used with multiple speakers. NOTE: The minimum load impedance allowed is 4 ohms. If lower
load impedance is used the STEALTH ULTRA-LITE™ may shut down when the demand for
current exceeds the maximum allowed. If shutdown occurs check your speaker load
impedance.
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STEALTH ULTRA-LITE™ POWER AMPLIFIER
CONNECTIONS
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STEALTH ULTRA-LITE™ SPECIFICATIONS
INPUT IMPEDANCE
OUTPUT POWER
INPUT SENSITIVITY / MAX OUTPUT
MAXIMUM INPUT SIGNAL
VOLTAGE GAIN - MAXIMUM
NOISE FLOOR
BASS / TREBLE RANGE
DYNAMIC RANGE
DISTORTION
FREQUENCY RESPONSE
INPUT POWER
DIMENSIONS
WEIGHT
PROTECTION
470k ohms
4Ω @ 10% THD = 180WPEAK = 90WRMS
4Ω @ 1% THD = 160WPEAK = 80WRMS
8Ω @ 10% THD = 120WPEAK = 60WRMS
8Ω @ 1% THD = 92WPEAK = 46WRMS
16Ω @ 10% THD = 62WPEAK = 31WRMS
-10dBu / .25vrms
+17dBu
47dB
-80dBu
+/- 10dB
104db A WTD
@10dBu output=.02% Full Output=.1%
20Hz – 20KHz = +0 / -.5dB
40mA @idle 1.5A full power @4Ω
4.95” W x 1.75” H x 4.2” D
.9 LBS
Auto shutdown / Output shorts or low load
impedance. Protected for open loads.
Note: 0dbu = .775 vrms
The STEALTH ULTRA-LITE™ Power Amplifier is covered under US Patents
6,831,514 and 9,402,128 Other Patents Pending.
STEALTH ULTRA-LITE and ULTRA-LITE are trademarks of ISP Technologies
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WARRANTY AND SERVICE
The Internal Circuitry is fully guaranteed to be free of defects under normal use and service
for a period of three years from the date of purchase.
Any damage resulting from the misuse or the failure to follow the precautions and
instructions will void the warranty.
In the event that the unit needs to be repaired, please return the unit to ISP Technologies
directly. Simply repack the unit, send a copy of the original receipt, a note stating the
problem, your contact information and send it to:
ISP Technologies, LLC
5479 Perry Drive Unit B
Waterford, MI 48329
Attn: Repair Dept.
All shipping charges must be fully prepaid.
ISP will not be responsible for any damages incurred in shipping of any unit. Any claim will
need to be settled with the shipping company.
The warranty will be voided if the serial number has been tampered with in any way. The
warranty card must also be filled out and returned in order to activate the warranty.
Should you have any questions for the repair department prior to returning the product
please call 248-673-7790
ISP TECHNOLOGIES, LLC
5479 PERRY DRIVE UNIT B
WATERFORD, MI. 48329
Phone: 248-673-7790 www.isptechnologies.com
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