Mixer Amplifier & Passive Speakers for Halls & Large Rooms
A mixer amplifier with built-in microphone, Bluetooth, USB and FM inputs, paired with passive wall and line-array speakers — the classic way to fill an auditorium, hall or large classroom from a single rack unit.
The Amplifier & the Speakers
Pick an amplifier by the power your room needs, then add the passive speakers it drives. The amplifier supplies the power; the speakers have none of their own.
Mixer Amplifier — choose your power
| Power | Inputs | Outputs | Best for |
|---|---|---|---|
| 60 W | 5 mic + 2 aux, USB/BT/FM | 70V / 100V / 4–16Ω | Small hall, large classroom |
| 120 W | 5 mic + 2 aux, USB/BT/FM | 70V / 100V / 4–16Ω | Mid hall |
| 240 W | 5 mic + 2 aux, USB/BT/FM | 70V / 100V / 4–16Ω | Large hall |
| 350 W | 5 mic + 2 aux, USB/BT/FM | 70V / 100V / 4–16Ω | Auditorium |
| 500 W | 5 mic + 2 aux, USB/BT/FM | 70V / 100V / 4–16Ω | Large auditorium |
| 650 W | 5 mic + 2 aux, USB/BT/FM | 70V / 100V / 4–16Ω | Very large venue / many speakers |
Passive Speakers — driven by the amplifier
| Speaker | Drivers | Power | Use |
|---|---|---|---|
| Wall 20W | 4.5" woofer + 1.5" tweeter | 20 W | Classroom / distributed |
| Wall 30W | 6.5" woofer + 1.5" tweeter | 30 W | Larger room / distributed |
| Line array | 10" + 2 × 1.75" neodymium | 350 W (700 W peak) | Halls & auditoriums |
One Amplifier, Many Speakers
This is the traditional approach to filling a large space: a single mixer amplifier powers a set of passive speakers spread around the room. The amplifier does the mixing too — plug in up to five microphones and two line/aux sources, or use the built-in Bluetooth, USB and FM, and route it all to your speakers. A teacher or presenter microphone connects straight into the front panel.
The amplifier offers both 70V/100V constant-voltage outputs — for many speakers on long runs — and 4–16Ω low-impedance outputs for a smaller, direct setup. Pair it with passive wall speakers for distributed coverage, or with the line-array speaker for a focused, high-output throw down a hall.
All models are CE, FCC and RoHS certified and available for OEM customisation.
Core Features
- 60–650W across six power tiers.
- 5 mic + 2 aux inputs — built-in mixer.
- USB, Bluetooth & FM sources built in.
- 70V / 100V & 4–16Ω outputs.
- Passive wall speakers — 20W & 30W, distributed.
- Line-array speaker — 350W for halls, 129 dB max SPL.
- One central rack unit drives the whole room.
- CE · FCC · RoHS certified, 2-year warranty.
Specifications
| Mixer amplifier | |
|---|---|
| Type | Mixer amplifier (mixer + power amplifier in one) |
| Power options | 60W · 120W · 240W · 350W · 500W · 650W |
| Microphone inputs | 5 |
| Aux / line inputs | 2 |
| Built-in sources | USB, Bluetooth, FM tuner |
| Outputs | 70V / 100V constant-voltage and 4–16Ω low-impedance |
| Zones | 5-zone output |
Full electrical datasheet (frequency response, S/N, THD, dimensions, weight) available on request for the selected power model.
| Passive wall speakers | |
|---|---|
| Wall 20W | 4.5" woofer + 1.5" tweeter, rated 20W |
| Wall 30W | 6.5" woofer + 1.5" tweeter, rated 30W |
| Line-array speaker | |
| Drivers | 1 × 10" (65 mm) neodymium LF + 2 × 1.75" (44 mm) neodymium full-range |
| Frequency range | 60 Hz – 16 kHz |
| Sensitivity | 100 dB |
| Impedance | 8 Ω |
| Rated / max power | 350 W / 700 W |
| Max SPL | 129 dB |
| Coverage (H × V) | 80° or 120° × 10° |
| Connectors | 2 × Speakon NL4 |
| Cabinet | 15 mm birch plywood, black, 1.5 mm steel grille |
| Dimensions (H×W×D) | 275 × 500 × 355 mm |
| Weight | 18 kg |
| General | |
|---|---|
| System | Amplifier + passive speakers (amplifier required to drive speakers) |
| Typical use | Auditoriums, halls, large or distributed classrooms |
| Certifications | CE · FCC · RoHS |
| Warranty | 2 years from shipment date |
| OEM | Custom branding available from low MOQ |
Smart Classroom
For auditoriums and large lecture halls, the amplifier and passive speakers provide the main sound in an advanced smart classroom solution.
Explore the Smart Classroom solution →Video Conference Room
For large multipurpose rooms, combine the amplifier with a PTZ camera and conference audio.
Explore the Conference Room solution →Frequently Asked Questions
What is a mixer amplifier?
A mixer amplifier combines an audio mixer and a power amplifier in one unit. You connect microphones and sources directly to it, balance them, and it amplifies the result to drive your speakers — without a separate mixer and amplifier. The Tralltech mixer amplifier has five microphone inputs, two aux inputs, and built-in Bluetooth, USB and FM.
Do passive speakers need an amplifier?
Yes. Passive speakers have no amplifier inside, so they must be driven by an external amplifier such as this mixer amplifier. This is different from an active speaker, which has its own amplifier built in and only needs a line-level signal.
Should you choose active speakers or an amplifier with passive speakers?
An amplifier with passive speakers is efficient when you need to drive many speakers from one central unit — for example distributed speakers around a hall or several rooms. Self-powered active speakers are simpler for one or two positions because the amplifier is already inside. Both approaches are valid; the choice depends on how many speakers you are driving and where.
How much amplifier power do you need for a hall?
As a rough guide, a large classroom or small hall is well served by 60–120W, a mid-size hall by 240–350W, and a large auditorium by 500–650W — but the real figure depends on the number and sensitivity of the speakers and how loud the room needs to be. We are happy to help size the amplifier for your specific venue and speaker layout.
What is the difference between 70V/100V and 4–16Ω outputs?
A 70V or 100V constant-voltage output is designed for distributed systems, where many speakers run on long cables across a building. A 4–16Ω low-impedance output drives a small number of speakers directly, as in a single room or stage. This amplifier provides both, so it suits a single hall or a distributed installation.
Can you connect microphones directly to the amplifier?
Yes. The amplifier has five microphone inputs on the front, so a teacher's or presenter's microphone — wired, or the receiver of a wireless microphone system — connects straight in. You can mix several microphones with the Bluetooth, USB and FM sources at the same time.
Start with a sample. No commitment required.
Tell us about your hall or venue and we'll size the amplifier and speakers for you — with factory-direct pricing for system integrators.
Guangzhou Tralltech Technology Co., Ltd. is a smart classroom and video conference room solution provider, manufacturing most of our hardware in-house and serving system integrators in 70+ countries since 2012.
Last reviewed: May 2026 by Tralltech Technical Team