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  • QSC SPA4-100 four-channel 100 W installation power amplifier, front angled view
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QSC SPA4-100: 4-Channel 100 W Installation Power Amplifier

Model SPA4-100

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  • Authorized QSC Reseller
  • Manufacturer Warranty
  • Pan-India Delivery
  • Expert Project Support
  • Four channels at 100 W into 8 ohm and 4 ohm
  • 200 W bridged at 8 or 4 ohm, 175 W at 70 V or 100 V (250 W peak)
  • Class D, fanless, Auto-Ramp standby after 25 minutes
  • Joining brackets for under-table and wall mounting
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Product Overview

Overview

The QSC SPA4-100 is a half-rack, 1U installation amplifier with four 100 W channels. It is the top four-channel model in the compact SPA family: 100 W per channel into 4 or 8 ohms, 200 W bridged, and 175 W on 70 V or 100 V lines (with a 250 W peak). It suits a room with two stereo zones that need more headroom than the SPA4-60 offers.

Corporate AV supplies, installs and supports Q-SYS systems from QSC across India. Request a quote for the SPA4-100 with supply, installation and commissioning.

Key features

  • Four channels at 100 W into 8 ohm and 4 ohm
  • 200 W bridged at 8 or 4 ohm, 175 W at 70 V or 100 V (250 W peak)
  • Class D, fanless, Auto-Ramp standby after 25 minutes
  • Joining brackets for under-table and wall mounting
  • 1U half-rack, 43 x 220 x 241 mm

Typical applications

  • Two-zone rooms needing more headroom
  • Boardrooms and training rooms
  • Small venues with four speaker feeds
Why choose the SPA4-100
it is a 4-channel installation power amplifier from QSC, it gives four channels of 100 W in the fanless half-rack SPA case for two-zone rooms.
Product Highlights

Key Benefits

Four channels at 100 W into 8 ohm and 4 ohm

200 W bridged at 8 or 4 ohm, 175 W at 70 V or 100 V (250 W peak)

Class D, fanless, Auto-Ramp standby after 25 minutes

Joining brackets for under-table and wall mounting

1U half-rack, 43 x 220 x 241 mm

Use Cases

Ideal Applications

Two-zone rooms needing more headroom

Boardrooms and training rooms

Small venues with four speaker feeds

Technical Details

Technical Specifications

Output power
Stereo, all channels driven 100 W at 8 ohm and 4 ohm
Bridged (per channel pair) 200 W at 8 ohm and 4 ohm; 175 W at 70 V and 100 V (250 W peak)
Specifications
Output circuitry Class D, no active cooling
Signal-to-noise ratio > 100 dB, A-weighted (20 Hz - 20 kHz)
Input sensitivity 1.23 Vrms (+4 dBu)
Maximum voltage gain 25 dB
Input impedance > 10 kOhm balanced or unbalanced
Maximum input level +24 dBu (12.3 V)
High-pass filter Switchable 80 Hz when bridged at 70 V and 100 V
Dimensions (H x W x D) 43 x 220 x 241 mm (1RU half-rack)

Documents & Downloads

Datasheet Q-SYS SPA4-100 Data SheetOfficial Biamp data sheet for the SPA4-100. The PDF may also cover other models in the same range. User Manual Q-SYS SPA4-100 ManualOfficial Biamp manual for the SPA4-100. The PDF may also cover other models in the same range. CAD Drawing Q-SYS SPA4-100 DrawingsOfficial Biamp drawings for the SPA4-100. The PDF may also cover other models in the same range.

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Why CorporateAV?

Sourced right. Installed right.

Genuine Manufacturer Stock
Every unit sourced through authorized distribution, backed by manufacturer warranty.
Expert AV Integration
Paired correctly with compatible systems and your room's existing AV infrastructure.
Pan-India Delivery & Support
On-site installation and ongoing technical support wherever your project is based.
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Additional Information

Why Buy The SPA4-100 From Corporate AV?
  • Genuine QSC stock with manufacturer warranty support
  • Custom pricing for bulk and multi-room / multi-site rollouts
  • Local after-sales support — a real team you can call or WhatsApp, not a call centre
  • Expert guidance on product selection and deployment planning
  • Professional installation across Bangalore, Hyderabad, Mumbai, Delhi NCR, and the wider India region
Contact us: +91 99452 30186, WhatsApp us or email avsupport@corporateav.in.
Distribution

Corporate AV supplies and installs QSC products across Bangalore, Hyderabad, Mumbai, Delhi NCR, Chennai, Pune, Kolkata, Ahmedabad, and the wider India region.

Frequently Asked Questions

What is the QSC SPA4-100?
The QSC SPA4-100 is a half-rack, 1U installation amplifier with four 100 W channels. It is the top four-channel model in the compact SPA family: 100 W per channel into 4 or 8 ohms, 200 W bridged, and 175 W on 70 V or 100 V lines (with a 250 W peak). It suits a room with two stereo zones that need more headroom than the SPA4-60 offers.
How does the SPA4-100 differ from the SPA2-200?
It has four channels at 100 W against two channels at 200 W, so it fits four speaker feeds where the SPA2-200 fits two heavier ones.
What power does it give at 70 V and 100 V?
Bridged, it delivers 175 W on a 70 V or 100 V line, and Q-SYS notes a peak power of 250 W for this model.
Do I need a fan or a ventilated rack?
No. Class D efficiency means no active cooling, though a plenum kit is listed by Q-SYS for ceiling installs.
Is Auto-Ramp automatic?
Yes, after 25 minutes without signal it ramps down to standby and ramps up quietly when signal returns.
What does the box contain?
A power cable, quick start guide, connector kit, rack-mount ears and mounting brackets.
Can Corporate AV supply and install the QSC SPA4-100 in India, and how do I get a quote?
Yes. Corporate AV supplies, installs and supports Q-SYS and QSC systems across India, with a site survey, commissioning and after-sales support. Use the Request a Quote button on this page or message us on WhatsApp.