Tascam Dual Power Amplifier PA-30 Owners Manual

»
PA-30
Dual Power Amplifier
OWNER’S MANUAL
9A09572800 

The TASCAM PA-30 is a high-performance
professional audio power amplifier for nearfield studio
monitoring and low-level sound reinforcement. In
stereo mode, the PA-30 delivers 30 watts per channel
continuously into an 8 ohm load - with no more than
0.05% total harmonic distortion. For applications
requiring higher output power, the unit may be
operated in BTL (Balanced Transformerless) mode -
also known as bridged operation - and will deliver a
full 60 watts continuously into 8 ohms (see the BTL
Operation...

1) Read these instructions.
2) Keep these instructions.
3) Heed all warnings.
4) Follow all instructions.
5) Do not use this apparatus near water.
6) Clean only with dry cloth.
7) Do not block any ventilation openings. Install in
accordance with the manufacturers instructions.
8) Do not install near any heat sources such as
radiators, heat registers, stoves, or other apparatus
(including amplifiers) that produce heat.
9) Do not defeat the safety purpose of the polarized or
grounding-type plug. A polarized...

•Do not use the PA-30 if the power cord appears
frayed or broken.
•Do not spill liquids into or on the PA-30 chassis. If
the chassis becomes wet, allow it to dry thoroughly
before reconnecting the unit.
•Allow sufficient space at the top, and bottom of the
PA-30 to permit a flow of cooling air. Keep the unit
away from radiators or others that produce heat.
•Never connect the PA-30 outputs to a battery, power
supply or other voltage source. Do not short the
output hot terminals together.
•The  minimum...

1. POWER Switch and Indicator
A two-position rocker-type switch controls power to
the unit. Depressing the upper surface of the switch
turns the amplifier on; depressing the lower surface
turns it off. The green LED Power indicator will light
whenever the unit is on and is connected to a properly
functioning source of power.
2. PROTECTION Indicator
The red LED Protection indicator remains off
whenever the PA-30 is turned on and is operating
normally.
If an overload, short circuit, DC offset or other...

6. INPUTS (A & B, XLR & RCA Type)
Two input connectors are provided for each channel:
one RCA (phono) jack and one XLR-type female
connector. Either connector may be used on a given
channel, but both connectors for a single channel
should not be used simultaneously.
Both inputs present a high impedance, and cause no
appreciable loading to source outputs. Input sensitivity
is –10 dBV (0.3 volt RMS) at the RCA inputs, and +1.3
dBu (0.9 volt RMS) at the XLR inputs, for rated output
(with Input Level control...

Input Connections
Before making connections to the PA-30 signal inputs,
find the nominal output level of your signal source (this
information is usually given in the Specifications
section of the instruction manual). Equipment
operating at –10 dBV should be connected to the RCA
(phono) inputs, while +4 dBm equipment will operate
best if connected to the XLR-type inputs. (Low-level
signal such as an electric guitar or phonograph
cartridge will require an external preamplifier.)Components that operate at –10...

Output Connections
Each channel of the PA-30 will drive a minimum load
impedance of 8 ohms. Connecting a load of lower
impedance will result in current limiting and may
trigger the Protection circuits to shut down the
amplifier.
Figure 7 shows a normal stereo-mode connection of
two individual speakers to the PA-30 outputs. When
making loudspeaker connections, always be sure to
maintain correct polarity; if you wire the speakers out
of phase with one another, you will get acoustical phase
cancellations....

The PA-30 rear panel includes a switch that selects
either normal stereo mode or a special mode termed
BTL (Balanced Transformerless).  The setting of this
switch determines the maximum power available to the
load from the PA-30, and also decisively affects how
the load is connected to the amplifier.  This section
explains the BTL mode, and describes how to use it.
Theory of Operation
BTL mode (also called bridged mode) uses both
channels of the PA-30 to form a single monophonic
amplifier with significantly...

Output power at 8 ohms, (1 kHz):30 Watts minimum RMS per channel in stereo
mode, both channels driven. (0.05% THD)
60 Watts minimum RMS in BTL (monophonic)
mode. (0.08% THD)
T otal Harmonic Distortion (1 kHz):
0.05% (30 Watts 8 ohms, STEREO)
0.08% (60 Watts 8 ohm, BTL)
Intermodulation Distortion: Less than 0.2%, 70Hz: 7kHz (4:1)
Frequency Response: 20 Hz to 20 kHz, +0, 1 dB at rated power output.
Damping Factor: 80 minimum, 8 ohm load. 20 Hz to 20 kHz.
Input Impedance and SensItivity: –10dBV (0.3 volt...