The S&L Catalog
50W Mono Audio Amplifier - 70V or 100V
Model: SF-PA50A
- 50 Watts RMS constant voltage amplifier
- 70V or 100V Output
- Plenum rated per UL 2043 Standard
- Analog balanced Mono Input or unbalanced stereo mini-jack Input
- Adjustable gain with dual-LED VU metering
The SF-PA50A is a 50 Watt audio power amplifier that converts one analog input to a 70 V or 100 V constant voltage amplified output.
An analog audio source may be connected to either the mono balanced terminal block input or to the unbalanced Mini-Jack which sums the left and right channels to mono. Amplifier gain is set by the installer using a rear-panel single-turn potentiometer with an associated dual-LED VU meter calibrated to 20 dB below maximum power output.
The SF-PA50A is equipped with an internal VCA for setting the amplifier output level. A detachable terminal block provides for the connection of an external 10kohms potentiometer or a 0 to 10 Vdc control voltage. RDL remote controls are available to provide single-turn, multi-turn (rotary encoder) or pushbutton (ramp or fixed level selection) user level control. VCA control insures long term noise-free level adjustment.
The module is equipped with both thermal and output short-circuit protection. The high-efficiency Class D output stage produces minimal heat for all levels of expected voice or music modulation. Upon power-up and during overloads or overheating, an LED MUTE indicator glows yellow and the output is muted.
- 50 Watts RMS constant voltage amplifier
- 70V or 100V Output
- Plenum rated per UL 2043 Standard
- Analog balanced Mono Input or unbalanced stereo mini-jack Input
- Adjustable gain with dual-LED VU metering
- Automatically limits supply current to protect against power supply shutdown
- VCA control on detachable terminal block
- External control using 10kohms Potentiometer or 0 to 10Vdc
- Compatible with RDL remote level controls
- LED Indicators: Power, Amplifier Mute, Analog Input Level
- High-efficiency Class D operation
- Thermal and short-circuit protection
- Amplifier Type - Power Amplifier
- Dante Enabled - Yes
- Warranty - Yes
- Loudspeaker Voltage - 70V
- Loudspeaker Voltage - 100V
- Spec Sheet available - Yes
- Depth: 6.45 in
- Height: 1.70 in
- Noise: <-90dB (below maximum power); <-80dB (below 1/8 power)
- Width: 5.83 in
- Shipping Weight: 4.22 lbs
- DC Voltage: 24 Volts
- 70V Taps: 50 Watt
- 100V Taps: 50 Watt
- Warranty (Length/Type): 3 Years
- Minimum Frequency Response (Bandwidth): 50 Hz
- Minimum Frequency Response (Bandwidth): 0.05 kHz
- Maximum Frequency Response (Bandwidth): 20000 Hz
- Maximum Frequency Response (Bandwidth): 20 kHz
- Number of Inputs: 2
- Total Harmonic Distortion + Noise (THD+N): 1 %
- Operating Temperature (Maximum): 104 F
- Operating Temperature (Minimum): 32 F
- Current Draw: 2.70 Amps
- AC Voltage (Minimum): 100 Volts
- AC Voltage (Maximum): 240 Volts
- Shipping Width (with packaging): 2.25 in
- Shipping Height (with packaging): 7 in
- Shipping Depth (with packaging): 10 in
- Analog Input Connectors (2): Balanced terminal block or stereo unbalanced Mini-Jack (L and R inputs summed to mono)
- Balanced Input Level: +4dBu nominal, adjustable; -10dBu minimum (for 20dB below full output power); +25dBu maximum (before clipping)
- Unbalanced Input Level: -10dBV nominal, adjustable; -25dBV minimum (for 20dB below full output power); +10dBV maximum (before clipping)
- Gain Adjustment: Single turn audio taper (with associated Dual-LED VU Meter calibrated to 20 dB below full output power)
- Input Impedance: >10kohms balanced, >5kohms unbalanced
- Common Mode Rejection: > 60dB (balanced, 50Hz to 120Hz
- Power Amplifier Output: 50 W RMS (70 or 100V)
- Indicators (5): Front-panel: Power (blue), Amplifier muted (yellow), Rear-panel: Overload Protect (red), dual-LED VU meter (2)
- VCA: 0 to 10 Vdc control, detachable terminal block (compatible with RDL VCA wall controls)
Suggested Products
S&L Integrated
7 Midway Road
Thomasville, GA 31757
USA
(229) 378-8866
https://slintegrated.com/