POWER
CH A
0
10
CH B
0
10
XPA 40
4
1. Warranty Information
Unpacking
As part of our quality control system, every Studiomaster Professional product is thoroughly inspected before leaving the factory to ensure
a flawless performance. After unpacking, please inspect the unit for any physical damages. In the event that a damage has occurred,
kindly notify your Studiomaster Professional dealer immediately. We request you to retain the packing/cartons should the product require
servicing/maintenance in the future.
2. Introduction
The Studiomaster Professional XPA series is a premium-grade high power stereo amplifier featuring an
intuitive
Thermal Management
System (TMS) that delivers unmatched sound, uninterrupted performance and optimal protection.
3. Features at a Glance
1. Professional-grade high-power stereo amplifier.
2. High-quality balanced XLR and ¼” Stereo Jack input connectors
3. 3 switchable operational modes: Stereo, Mono & Bridge
4.
Intuitive
Thermal Management System (TMS) for
temperature-controlled gain variation for optimal thermal
protection & uninterrupted sonic performance.
5. High-current toroidal transformers with high-endurance cores for
greater transient response and low-noise even at 2 Ohms.
6. Sensitivity (0.775V or 1.2V) selection switch allows flexibility in
connection of input sources.
4. Front & Rear Panel Description
1 Master Switch
Switches the unit on and off.
2 Power ON Indicator Light
The Studiomaster Professional logo lights up when the amplifier is powered on.
3 Volume Control
This knob is used to adjust and control the volume and output level of the respective channel.
4 TMS (Thermal Management System)
This amplifier features an innovative temperature controlled gain variation technology called the Thermal Management System (TMS).
When the temperature at the heatsink reaches beyond the permissible limit, the TMS circuit intuitively reduces the gain proportionally
without any dropouts. This feature prevents the amplifier from going into thermal protection mode thereby ensuring a smooth and
uninterrupted sonic performance.
5 Mute Indicator
The Yellow LED lights up when the amplifier is in mute mode. This may occur due to the following reasons: switch on delay (3 seconds),
presence of a continuous voltage on the channel output, short circuit, thermal protection of the channel, or thermal protection of the
transformer.
6 Signal & Clip Indicator
These 4-segment Green LED lights show the output level of the amplifier. When the Clip LED turns Red, it means that the signal is
distorting/clipping. Kindly reduce the output level from the mixer or other connected devices to avoid any damages.
7 Bass/Boost Indicator
This Red LED lights up when the Bass/Boost Function is activated or is in use.
8 Air Intake Grill
This intake grill sucks in air to dissipate the heat generated and keep the amplifier cool.
For best results, do not obstruct the grill and clean the air filter whenever necessary.
Front Panel
7
2
3
4 5
3
1
6
8
8
7. Limiter switch to protect speakers from damage due to distorted
input signals.
8. 41-dented rotary volume control knobs.
9. Low THD & high damping factor for excellent sound quality.
10. High-quality glass epoxy, double-sided PTH PCBs and
high-grade components ensure reliability even in tough ambient
environs.
11. Intelligent cooling using low-noise variable speed fans & direct
mounted over-designed heat-sinks.
12.
Built in protection against mains over voltage supply.
