The highly flexible QSC SPA4-100 4-Channel Power Amplifier is an advanced Class-D amplifier with Energy Star rated efficiency well suited for smaller installations including meeting rooms or BGM zones. The convection cooled amplifier is designed to conserve energy. An auto-ramp circuit ensures quiet and fast power up from standby when a signal is present and seamless power-down following 25 minutes of inactivity, dramatically reducing power consumption.

The rear panel utilizes Euroblock connectors for inputs and outputs as well as remote inputs. Each channel of the SPA4 provides 100W of power, while the bridge mode provides 200W into 4 or 8 ohms and 175W into 70/100V.

Energy Star Qualified    Class-D Topology    4 and 8 Ohms + 70/100V Operation    Bridgeable Outputs for Higher Power    Auto-Ramp Provides Quiet Power Up/Down    Euroblock Input, Remote Input, Output    Rack-Mountable 1 RU, 1/2 Rack Width    Includes Rack Ears + Mounting Brackets    Connector Pack and Power Cord Included

• Provides up to 100W per channel into Low-Z loads at 4 and 8 Ohms
• Energy Star qualified SPA Series employ an efficient class-D design to conserve energy and reduce operational cost
• Delivers up to 175W into 70/100V when bridged
• Rack-mountable 1 RU, half-rack width enclosure—the SPA Series can be mounted in 1 RU, 1/2 rack space, and their clever joining brackets enable easy under table and wall mounting

Related Questions and Answers

Q: 1. Will this lens work with a GH-2 body?

A: The Panasonic Lumix G Vario 100-300mm f/4-5.6 II POWER O.I.S. Lens is compatible with the Panasonic Lumix DMC-GH2 camera.

Q: 2. How long is the 4pin XLR cable that is included?

A: The POWERANGE PR-PL-1680B Dual-Channel 100W Portable Charger for V-Mount Lithium-Ion Batteries with 16.7 VDC Output's included 4-pin XLR cable is 10.17 feet in length.

Q: 3. will this work on an olympus EM1 mark ii? New to the 4/3 camera counts, trying to learn. it would be awesome on the olympus if it would work

A: Yes, it will work. M4/3 is an interchangeable system. I use Panasonic and Olympus cameras and lenses together. It's a versatile, mix and match system. I'm very happy.

Q: 4. B&H specs show the maximum magnification for this lens is 0.21x. A 2x multiplication factor to convert from micro 4/3 sensors to a 35mm equivalent for lens focal length and f/stop. Should the 2.1x max magnification be multiplied by 2 to yield a 4.2 max magnification?

A: If you are comparing the size of the subject you are photographing on the Four Thirds sensor compared to the size of the subject with an equivalent lens on a full-frame sensor, then yes, the subject photographed on the Four Thirds sensor would appear twice as large as the subject on the full-frame sensor. As such, the equivalent full-frame magnification would be 0.42x, which is slightly under 1/2 life-size (NOT 4.2x, which would be slightly over four times larger than life-size).

Q: 5. What is the maximum frames per second with the 100-300 mark ii and the Panasonic G9 in continuous autofocus mode?

A: the G9 with shoot continuously from 9fps to 60 fps with 20.3 MP.

Q: 6. Will this lens work on a Lumix Gx7?

A: The Panasonic Lumix G Vario 100-300mm f/4-5.6 II POWER O.I.S. Lens is compatible with the Panasonic Lumix DMC-GX7 camera.

Q: 7. Hi. Will this Panasonic 100- 300mm lens work with an Olympus E-M10 Mark2 and if so are they any features of this lens which would be limited by using on the Olympus? Thanks in advance.

A: I use this lens on an em1, and am thrilled with its performance. It is sometimes underrated vis a vis the longer,more expensive Panasonic, but don't let that deter you; this is a great lens at a great price. Just be sure to turn off the in-lens image stabilization and rely on the in-camera stabilization on your Olympus body. Go for it. You won't be sorry.

Q: 8. How does this differ from the original version of this lens?

A: Upgraded support for harsh weather conditions (Splashproof / Dustproof).Panasonic POWER O.I.S. compatible with LUMIX Dual I.S. 2.0 LUMIX Mirrorless cameras.Faster focus tracking via a 240 fps linear motor.

Q: 9. What optical zoom would this lens be equivalent to when comparing to profressional camcorders? Being used on a GH4.

A: Equivalent to 200 to 600 mm on a full frame camera. Not certain how it would compare to professional camcorder.

Q: 10. Does anyone know the difference between the US and the international version? is it the size, weight, glass, motor? what exactly makes them different?

A: The US model comes with a warranty for US customers. This is the only difference.