The QSC SPA4-100 4-Channel Power Amplifier (100W) is an efficient Class-D amplifier designed for smaller installations, including meeting rooms, background music systems, and distributed audio zones. Its ENERGY STAR-qualified design helps reduce energy consumption and operating costs.
The convection-cooled amplifier is designed to conserve energy without requiring a fan.
An automatic ramp circuit provides quiet, fast power-up from standby when an audio signal is detected and seamless power-down after 25 minutes of inactivity, helping reduce power consumption.
The rear panel features Euroblock connectors for audio inputs, speaker outputs, and remote inputs.
Each channel delivers up to 100W, while bridged operation provides up to 200W into 4- or 8-ohm loads and up to 175W into 70V/100V distributed audio systems.
QSC SPA4-100 4-Channel Power Amplifier Features:
- Four amplifier channels delivering up to 100W per channel into 4- or 8-ohm loads
- Energy-efficient Class-D design with ENERGY STAR qualification
- Bridged output of up to 200W into 4/8 ohms or 175W into 70V/100V systems
- Convection cooling for quiet operation
- Automatic standby and signal-triggered power-up to help reduce energy consumption
- Compact 1U, half-rack-width design with included mounting hardware
- Euroblock connections for audio inputs, speaker outputs, and remote control
QSC Certified Expertise
Knowledgeable Support for QSC Products
HDTV Supply has QSC Level 1 certified expertise. Our team has completed QSC Level 1 Training, demonstrating foundational knowledge of the QSC platform, including system design, hardware and software, programming, and troubleshooting.
This training helps us provide knowledgeable product guidance when customers are selecting and deploying Q-SYS solutions. When you purchase Q-SYS products from HDTV Supply, you are working with a team that understands the Q-SYS platform and can help you make informed product and system decisions.
Why Buy the QSC SPA4-100 from HDTV Supply?
Choose the QSC SPA4-100 from HDTV Supply for compact, energy-efficient amplification in meeting rooms, background music systems, and distributed audio installations. Its flexible output configurations and space-saving design make it a practical option for a variety of commercial audio applications.
Ask a Question
Need help choosing the QSC SPA4-100 4-Channel Power Amplifier for your audio installation? Contact our team for assistance with product specifications, connectivity, and system compatibility.
QSC SPA4-100 4-Channel Power Amplifier Specifications
| General | |
|---|---|
| Brand | QSC |
| Model / Part Number | QSC-SPA4-100 |
| Product Type | 4-Channel Power Amplifier |
| Form Factor | Tabletop; rack-mountable with included hardware |
| Number of Amplifier Channels | 4 |
| Amplifier Class | Class-D |
| Load Impedance Support | 4 ohms and 8 ohms |
| Distributed Line Voltage Support | 70V and 100V |
| Power Rating per Channel | 4 × 100W |
| Bridged Output Power | 1 × 200W bridged at 4/8 ohms |
| Bridged Distributed Output | 1 × 175W bridged at 70V/100V |
| Performance | |
| Frequency Response | 20Hz–20kHz, ±0.1dB at 4/8 ohms |
| Signal-to-Noise Ratio | Greater than 100dB SNR |
| Signal Processing | |
| Digital Signal Processing (DSP) | No |
| Audio Delay | No |
| EQ and Filters | High-pass filter |
| Dynamics Processing | No |
| Connectivity | |
| Analog Audio Inputs | 1 × 10-pin block line input connection (as listed in supplied specifications) |
| Speaker Outputs | 2 × 4-pin block speaker outputs |
| Digital Audio I/O | No |
| Network I/O | No |
| USB I/O | No |
| Phantom Power | No |
| Wireless Connectivity | No |
| Power | |
| AC Input Power | 100–240VAC, 50/60Hz |
| AC Power Connector | 1 × IEC 15A / NEMA 5-15 |
| Physical | |
| Display | Single-LED indicators only |
| Rackmount Size | 1U, half-rack width with included hardware |
| Cooling | Convection |
| Certifications | CE, ENERGY STAR, FCC, RoHS, UL, WEEE |
| Dimensions (H × W × D as provided) | 9.5 × 8.7 × 1.8 in / 241.3 × 221 × 45.7 mm |
| Product Weight | 4 lb / 1.81 kg |
| Packaging Information | |
| Package Weight | 7.02 lb |
| Box Dimensions (L × W × H) | 15.4 × 11.4 × 3.4 in |
Manuals and Documentation
Q/A: QSC SPA4-100 4-Channel Power Amplifier
Q1: What is the QSC SPA4-100?
The QSC SPA4-100 is a four-channel Class-D power amplifier designed for compact commercial audio installations such as meeting rooms and background music zones.
Q2: How much power does the SPA4-100 provide per channel?
It provides up to 100W per channel into 4- or 8-ohm loads.
Q3: Can the SPA4-100 operate with 70V and 100V distributed audio systems?
Yes. Its specified bridged configuration supports up to 175W into 70V or 100V distributed audio systems.
Q4: What is the bridged output power at low impedance?
The supplied specifications list up to 200W in bridged operation at 4 or 8 ohms.
Q5: Does the SPA4-100 have built-in DSP?
No. The supplied specifications list no DSP, audio delay, or dynamics processing. A high-pass filter is listed.
Q6: What type of amplifier does the SPA4-100 use?
It uses Class-D amplification, designed for efficient operation and reduced energy consumption.
Q7: Does the SPA4-100 require a cooling fan?
No fan is specified. The amplifier uses convection cooling for quiet operation.
Q8: What input voltage does the SPA4-100 accept?
The supplied specifications list an AC input range of 100–240V at 50/60Hz.
Q9: Can the SPA4-100 be rack-mounted?
Yes. It has a compact 1U, half-rack-width design and can be rack-mounted using the included hardware.
Q10: What connectors are available on the SPA4-100?
The supplied specifications list block-style audio input and speaker output connections. The rear panel also includes remote input connections according to the product description.
Q11: Is the QSC SPA4-100 suitable for meeting rooms?
Yes. Its compact design, four channels, and efficient Class-D operation make it suitable for smaller commercial installations, including meeting rooms and background music zones.
Q12: How does the SPA4-100 reduce energy consumption?
Its efficient Class-D design and automatic standby behavior help reduce power consumption. The amplifier can power up when a signal is detected and power down after 25 minutes of inactivity, as described in the supplied product information.
Q13: Does the SPA4-100 support network or USB audio?
No. The supplied specifications list no network I/O, USB I/O, or digital audio I/O.
Q14: What are the dimensions and weight of the SPA4-100?
The supplied specifications list dimensions of 9.5 × 8.7 × 1.8 inches (241.3 × 221 × 45.7 mm) and a product weight of 4 lb (1.81 kg).
Q15: Where can I find the QSC SPA4-100 user manual?
The manual is linked in the Manuals section of this product page. Contact HDTV Supply if you need assistance with product information or installation requirements.
Warranty Information
Warranty coverage for the QSC SPA4-100 is subject to the manufacturer's applicable terms. Contact HDTV Supply or consult QSC's official warranty documentation to confirm the current coverage for this amplifier.
Customer Reviews
Read customer reviews for the QSC SPA4-100 4-Channel Power Amplifier or share your experience with the product.
Product Videos
Contact HDTV Supply for additional product information or available video resources for the QSC SPA4-100 4-Channel Power Amplifier.
