Ahuja AMX 812 Mixer (8 Channel)

Ahuja AMX 812 Mixer (8 Channel)

The Ahuja AMX-812 is an 8-channel PA audio mixing console built for everyday public address work in halls, houses of worship, schools and event venues. Every channel accepts either a microphone or a line-level source through a single 1/4 inch phone jack, and each channel carries its own gain, bass, treble, pan, echo and level controls with a clip LED, so the operator can balance voices and music sources channel by channel instead of relying on one global setting. A separate stereo input, a DSP echo section and a tape record and playback section complete a console that covers the core jobs of small and medium PA systems without external processors.

Key features

• 8 input channels, each with a 1/4 inch phone jack selectable for mic or line
• Channels accept both balanced and unbalanced signals
• Gain, bass, treble, pan, echo and level controls on every channel
• Clip LED indicator on each channel for safe gain setting
• Independent stereo input through separate left and right 1/4 inch jacks
• Echo section with delay, repeat and level controls, using digital signal processing
• Tape section providing record and playback facility
• Operates on AC mains and 24V DC

Channel inputs and control layout

Each of the eight channels starts with a 1/4 inch phone jack that can be switched between microphone and line duty. The microphone input is specified at 2 kilohms impedance with 62 dB of gain, while the line input offers 20 kilohms balanced or 10 kilohms unbalanced at 42 dB gain, which lets the same console handle dynamic microphones, keyboards, media players and the output of other mixers. Because the jack accepts balanced and unbalanced wiring, existing cable stock in most venues connects without adapters or rewiring.

Once a source is connected, the channel strip gives the operator direct control over its sound. The gain control sets the input sensitivity, the bass and treble controls shape tone with up to 12 dB of cut or boost at 100 Hz and 10 kHz, the pan control positions the channel between the left and right outputs, and the level control sets its place in the overall mix. The clip LED warns before the channel overloads, which keeps speech clear and prevents the harsh distortion that comes from overdriven inputs.

Echo and tape sections

The built-in echo section uses digital signal processing and provides delay, repeat and level controls, so the amount and character of the echo can be matched to the room and the programme. A small amount of echo adds presence to singing and announcements in dry halls, while turning the per-channel echo control down keeps formal speech completely dry. Each channel has its own echo send, so echo can be applied to one singer or speaker and left off the others.

The tape section adds a simple record and playback path. A recorder connected to the tape output captures the main mix for archives, rehearsal review or later broadcast, and the playback input returns recorded material or background music through the console. For venues that record services, classes or functions as a routine, this removes the need for a separate recording mixer or splitter.

Output quality and system connection

The AMX-812 line output is rated at 0 dBm nominal and +17 dBm maximum, equivalent to 775 mV and 5.5 V, which is enough to drive power amplifiers and booster amplifiers directly. Distortion is specified below 0.08 percent and the frequency response runs from 30 Hz to 20 kHz within +0 and -1 dB, so the console passes the full audible range without colouring the sound of the amplifiers and loudspeakers that follow it. The separate stereo input, on left and right 1/4 inch jacks, is the natural place for a laptop, phone or media player used for music between announcements.

Power, size and everyday use

The console operates on AC mains and can also run from a 24V DC supply, which keeps the mixer working from batteries where mains power is unreliable or unavailable. It measures 423 mm wide, 93 mm high and 302 mm deep and weighs 5.10 kg, a size that sits comfortably on a table or in a compact equipment rack at the side of a hall. For installers and venue teams that need a straightforward eight-channel console with per-channel tone, pan and echo controls, tape recording and dependable Ahuja construction, the AMX-812 remains a practical, proven choice.