The DA-550F from TOA Electronics is a high-quality, rack mountable four-channel digital amplifier. Designed for highly efficient operation, the DA-550F is capable of outputting 550W per channel at four Ohms. Each channel has an individual level control knob, and all input connections are via 3-pin removable terminal block. Output connections are made on a standard screw terminal strip.

The DA-550F has an internally settable high-pass filter, as well as built-in protection circuitry to protect against damage from overheating and overloads. Four front-panel air vents each offer removable dust filters for easy maintenance to ensure your amplifier keeps running smoothly. Bridged operation is available via simple push-button operation if desired.

Low Power Consumption    Electronically-Balanced Inputs    Built-In Protection Circuitry

Lightweight 2RU unit

Four removable terminal block inputs and four XLR inputs with front-panel level controls for each channel

Four outputs on a screw terminal strip

Built-in limiter and high pass filter

Efficient Class D circuitry

Low heat dissipation and power consumption

Protection circuitry prevents damage from overheating and overloads

Front panel LEDs for power, input, output, peak, and protect

Includes volume control caps to prevent unwanted level changes

Related Questions and Answers

Q: 1. this unit does not have a encoder right??

A: The video switcher does not come with a built-in encoder.

Q: 2. Does this come with a microphone for set up?

A: According to the 'In The Box' contents, it will come with a 'YPAO Setup Microphone'.

Q: 3. Can this unit do its own scaling? Example, having a camera at 1080p29.97 and one at 59.97... Frusterated that Blackmagic inputs all have to be the same to show up when we have PCs feeding into it and have to have a scaler for each of those feeds.

A: Yes. The unit auto detects input format and uses it and one can select output format, which will apply to all signals processed and mixed via this switcher.

Q: 4. How many Cameras can be keyed with chroma and luma keys

A: This switcher has one Keyer that would support one camera input.

Q: 5. Hello! What is the difference between PIP and POP? With POP can I control the size of the two Windows? Thank you!

A: PIP means Picture in Picture. The Program is display on the full screen, at same time the Preview source will be displayed in the Program window as an inset window. The size and position of the inset window can be adjusted from the menu. POP means Picture outside Picture. This is the same function as PIP only this allows you to see the Program source and Preview source side by side. The size is not adjustable with POP.

Q: 6. My audio and video are out of sync. Is there a fix?

A: Yes there is an audio delay function built into the switcher. This will allow you to adjust the timing of the audio to match your video. please check page 22 of the manual for more information.

Q: 7. Is there any way to format memory card which is being inserted in the slot for recording?

A: The AVMATRIX PVS0615U Portable 6-Channel Switcher with USB Streaming & 15.6" Display does not format SD cards. You would need to format the SD card in a computer to exFAT or FAT32 to use with the switcher.

Q: 8. Can three separate cameras have there own background image for multi cam green screen?

A: That is not possible with this switcher. You would not be able to have 3 separate camera and green screens set up.

Q: 9. Wait, so these are technically second gen HDMI 2.1 receiver and you still have to wait for a firmware update to use 4k120hz?

A: Via a future firmware update, this receiver will support end-to-end 8K and 4K resolutions and higher refresh rates, giving you a smoother and more realistic viewing experience.

Q: 10. Can this connect to blue-tooth headphones as well as the 5.0 surround speakers?

A: Yes