The DSPPA D7821 is a UHF kit with a true diversity receiver and two wireless mics that work at the same time, reaching 150 m in open space. It suits mosques, schools and event halls where two people speak.
====
The DSPPA D7821 is a ready-to-use UHF wireless microphone kit: one receiver and two wireless microphones that work at the same time on separate channels, with up to 150 m of range in open space. It fits mosques, school assemblies, hotel ballrooms and event halls where two people need to speak.
DSPPA D7821 key specs
- True diversity receiver with two channels, one per microphone.
- 200 selectable channels per transmitter, spaced 300 kHz apart.
- Signal-to-noise ratio of 105 dB or better, THD at or below 0.5%.
- Frequency response of 45 Hz to 16 kHz.
- Two AA alkaline batteries per mic for about 7 hours of continuous use.
Four-antenna reception and digital pilot lock
The receiver uses a four-antenna circuit to cut dropouts when the speaker walks between rows or stands behind a pillar. Digital pilot technology gives every channel its own D-code, so the receiver ignores nearby transmitters and several kits can run in the same building. During setup, one button scans for a clean channel and infrared pairing syncs the mic to the receiver, so nobody has to dial in frequencies by hand.
Battery life for a full event
Each transmitter draws little power, so a pair of AA cells lasts around 7 hours. The receiver shows the battery level of each transmitter, which lets the sound operator swap batteries before a Friday sermon or a graduation ceremony, not in the middle of it. Operating temperature is rated from -10 to +50°C.
Where it fits in Saudi Arabia
- Mosques: one mic for the imam at the mihrab, one for the khateeb or muezzin.
- Schools: principal and student mics for the morning assembly and school radio.
- Hotel and wedding halls in Riyadh and Jeddah: host and guest microphones.
- Majlis gatherings, rest houses and lecture rooms.
Connecting to your amplifier or mixer
The receiver offers balanced XLR and unbalanced 6.3 mm outputs, so it plugs into the mic or line input of the mixer amplifier you already have. It runs from a DC 12V / 1A adapter.
Need more than two mics?
Look at the D5841, which runs four handheld mics on one receiver.
Frequently Asked Questions
How many microphones come with the DSPPA D7821?
Two wireless mics and one dual-channel receiver, and both mics can be used at the same time.
How long do the batteries last?
About 7 hours of continuous use on two AA alkaline batteries per mic, with battery level shown on the receiver.
Can I run two kits in the same building?
Yes. There are 200 channels and a digital code per channel to prevent crosstalk, plus a one-touch scan for a clean channel.
Specifications
- Model: D7821
- Kit contents: Receiver ×1 + wireless microphones ×2
- Receiver type: True diversity, dual channel
- Frequency band: UHF
- Frequency stability: ±0.005%, PLL controlled
- Modulation: Wideband FM
- Channels: 200, 300 kHz spacing
- Effective range: 150 m (open environment)
- Receiver sensitivity: -98 dBm
- Max deviation: ±75 kHz
- Frequency response: 45 Hz - 16 kHz (±3 dB)
- Signal-to-noise ratio: ≥105 dB (1 kHz, A-weighted)
- THD: ≤0.5%
- Receiver outputs: Balanced XLR; unbalanced 6.3 mm (max +10 dB)
- Receiver power: DC 12V / 1A
- RF output power: Below 10 mW
- Transmitter antenna: Built-in
- Spurious suppression: -50 dB
- Transmitter battery: 2× AA alkaline, about 7 hours continuous use
- Operating temperature: -10°C to +50°C
- Operating features: Digital pilot with a unique D-code per channel, four-antenna circuit, one-touch clean-channel scan with infrared pairing, transmitter battery level shown on receiver
Features
- Two mics on one receiver: imam and khateeb, or host and guest, speak without swapping mics.
- Up to 150 m range in open space: speakers move around the hall or courtyard without dropouts.
- 200 channels with a digital code per channel: run several kits in one building without crosstalk.
- Signal-to-noise ratio of 105 dB or better: clean speech with no background hiss.
- About 7 hours on two AA batteries: a full sermon or event per set, with battery level shown on the receiver.