QSC USA-1310 Brochure

FEATURES

1000 watts per channel at 2 ohms
655 watts per channel at 4 ohms

USA 1310

he USA 1310, a member of QSC’s world-wide
best-selling line of amplifiers, is now even

ter

. The USA Series now offers even more value

and performance: Neutrik Combo input connec-

bet-

clip indicators, mono-bridging switch, and ac­tive balanced inputs. The USA 900 is ideal for
live sound specialists, system installers, and
other professionals who demand QSC’ s legend-

Built-in limiting (defeatable) for
speaker protection

Selectable high-pass filter (30 Hz,
50 Hz, or out)

Active balanced inputs
Neutrik ”Combo“™ input connectors

accommodate both 1/4” TRS and
XLR

Barrier strip inputs
”Touch-proof“ binding post outputs
Two-speed fan cooling
LED clip indicators
Patented Output Averaging™ short

circuit protection
Stereo, bridged mono, or parallel

operation
QSC reliability and audio

performance
Made in USA
3-year warranty PLUS optional

3-year extended warranty

tors (1/4” and XLR), selectable limiters, vari­able low-frequency filters, and even more
power in a new rugged, all-steel chassis. Other
standard features include comprehensive am­plifier and load protection, ample heat sinks,

LOAD

Stereo (W/Ch)

20Hz-20kHz, 0.1% THD (typical) 1kHz, 1% THD (typical)

8Ω 375 watts 400 watts
4Ω 655 watts
2Ω 1000 watts

Mono-Bridged

16Ω 750 watts 800 watts

8Ω 1310 watts

1675 MacArthur Boulevard
Costa Mesa, California 92626-1468 USA
Phone: [phone] Fax: [phone]

ary reliability and audio quality.

QSC Audio Products—the leader in
amplifier technology.

OUTPUT POWER (per channel, typical)

8 ohms, 20 Hz to 20 kHz, 0.1% THD, 375 watts
8 ohms, 1kHz, 1% THD, 400 watts
4 ohms, 1 kHz, 1% THD, 655 watts
2 ohms, 1 kHz, 1% THD, 1000 watts

OUTPUT POWER (bridged mono)

16 ohms, 1 kHz, 1% THD, 750 watts
8 ohms, 1 kHz, 1% THD 1310 watts

DISTORTION:

SMPTE-IM, less than 0.025%

FREQUENCY RESPONSE:

20 Hz to 20 kHz, +0/-1 dB, 1 watt

DAMPING FACTOR:

Greater than 200

BACK

DYNAMIC HEADROOM: 2 dB at 8 ohms
NOISE: 106 dB below rated output (A weighted)
SENSITIVITY: 1.12 Vrms for rated power (8 ohms)
VOLTAGE GAIN: 50 (34 dB)
INPUT IMPEDANCE: 10K unbalanced, 20K balanced
CONTROLS:

Front: AC Switch, AC Circuit Breaker
Back: Stereo/Bridge Switch/Ch 1 and Ch 2 Gain Knobs

8 Position DIP Switch for Filter & Limiter

INDICATORS:

PWR-ON: Green LED
CLIP: Red LED, 1 per channel

CONNECTORS: (each channel)

Input: Barrier strip and Neutrik "Combo" 1/4" TRS and XLR, tip positive

USA 1310 Specifications

Speakers: "Touch proof" binding posts

COOLING: Two-speed fan, rear-to-front air flow.
AMPLIFIER PROTECTION:

Full short circuit†, open circuit, ultrasonic, and RF protection. Stable into reactive or mismatched
loads.

LOAD PROTECTION:

On/off muting and DC-fault protection.

OUTPUT CIRCUIT TYPE:

Complementary linear outputs.

POWER REQUIREMENTS: 100,120, 240 Vac, 50-60 Hz
POWER CONSUMPTION:

Normal Operation: 4 ohms per channel: less than 12 amps, 120 Vac (1440 VA)

DIMENSIONS:

19.0" (48.3 cm) rack mounting

7.0" (17.8 cm) tall (4 spaces)

10.8" (27.4 cm) deep

WEIGHT: 54 Ibs (24.5 kg) net, 57 Ibs (25.9 kg) shipping

†Output Averaging™ short circuit protection (US Patent 4,321,554)
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE.

1675 MacArthur Boulevard
Costa Mesa, California 92626-1468 USA
Phone: [phone] Fax: [phone]

ARCHITECT’S AND ENGINEER’S SPECIFICATIONS

The power amplifier shall contain all solid-state circuitry, using
complementary silicon semiconductors. The amplifier shall
operate from 50-60 Hz AC power, with voltages of 100, 120, or
240 Vac. The amplifier shall operate from a normal household
AC outlet, drawing less than 1440 VA when driven with random
program material at 1/8 rated power into four ohm loads. The
amplifier shall be supplied with a single molded AC cord having
an appropriate AC plug for the intended operating voltage.

The amplifier shall contain two independent channels. Each chan­nel shall have independent protective circuitry against open cir­cuit, short circuit, or reactive loads, and the remaining channel
shall continue to operate if one channel fails. A muting circuit
shall provide three seconds of muting after turn-on, and shall
mute within 1/4 second after turn-off or loss of power, to protect
the load against turn-on or turn-off thumps. Self resetting ther­mal shutdown shall protect the circuitry against temperatures in
excess of 90°C, and a front panel resettable circuit breaker or
fuse shall protect against AC overloads.

Each channel of the amplifier shall typically be capable of meet­ing the following performance criteria, with both channels driven
simultaneously, unless otherwise stated: Output power, 8 ohms
per channel, 20 Hz-20 kHz, less than 0.1% distortion, at least
375 watts rms per channel. Output power, 4 ohms per channel, 1
kHz, less than 1% distortion, at least 655 watts rms per channel.

Frequency response shall be 20 Hz-20 kHz + 0, - 1 dB at 1 watt
output. SMPTE IM distortion shall be less than 0.025% at rated
power, 8 ohms, and less than 0.05% at rated power, 4 ohms. IHF
damping factor shall be at least 200. Signal to noise, below rated
output, shall be at least 106 dB (A weighted). Dynamic head­room at 8 ohms shall be at least 2 dB. The voltage gain shall be
34 dB at full gain. The input sensitivity for rated 8 ohm power
shall be 1.12 Vrms. Input impedance shall be 20 kilohms bal­anced and unbalanced noninverting, 10 kilohms unbalanced in­verting. Balanced, bridging input circuit shall be standard, and
the amplifier shall meet all performance criteria in the balanced
or unbalanced mode. The amplifier shall have built-in fan cool­ing, with automatic two-speed operation. Air flow shall be from
the back to front. Each channel shall have the following controls,
indicators, and connectors: Rear mounted gain control calibrated
in dB. Clipping indicator, responding proportionally to any distor ­tion in excess of 0.1%. Balanced/unbalanced input jack of the
Neutrik "Combo" (combined 1/4" TRS and XLR). Balanced input
of the barrier strip screw terminal type. Speaker terminals of the
"touch proof" binding post type. In addition, the chassis shall
feature a rear mounted mono-bridging switch, front mounted AC
switch and circuit breaker or fuse in some export locations, and
built-in rack mounting ears. The chassis shall mount in a 19" rack,
occupying 4 rack spaces (7.0"). Chassis depth behind the rails
shall be 10.8" plus 1 in allowance for the binding posts. Weight
shall be 54 Ib. The amplifier shall be the QSC Model USA 1310.