| Analog Class-D Mono Module |
15–100 W at 4–8 Ω |
20 Hz–20 kHz, typically ±1 to ±3 dB |
≤0.05%–0.1% at rated power |
85–100 dB, A-weighted |
Line-level analog, balanced or unbalanced |
High efficiency, generally low heat output |
Compact monitors, commercial speakers, built-in subwoofers |
Confirm load impedance, connector layout, cooling method, protection circuits, and power-supply compatibility. |
| Analog Class-D Stereo Module |
2 × 15–100 W at 4–8 Ω |
20 Hz–20 kHz, typically ±1 to ±3 dB |
≤0.05%–0.1% at rated power |
85–100 dB, A-weighted |
Stereo line-in, auxiliary input, sometimes balanced input |
High efficiency; shared power supply may require adequate headroom |
Desktop speakers, television speakers, small public-address systems |
Check channel crosstalk, simultaneous two-channel power, stereo balance, and maximum enclosure temperature. |
| DSP-Enabled Active Module |
20–500 W total, depending on channel count |
Typically 20 Hz–20 kHz; programmable equalization |
≤0.03%–0.1% at rated power |
90–110 dB, A-weighted |
Analog line-in, USB or digital audio, control interface |
High efficiency; DSP adds minimal heat but requires stable firmware |
Premium monitors, smart speakers, installed sound systems |
Define sample rate, bit depth, latency, firmware update method, tuning access, and long-term software support. |
| Bi-Amplified Two-Way Module |
2 × 20–250 W for woofer and tweeter channels |
Approximately 45 Hz–20 kHz, enclosure-dependent |
≤0.05%–0.1% at rated power |
90–105 dB, A-weighted |
Analog or digital input with active crossover |
High efficiency; needs careful thermal separation between channels |
Nearfield monitors, portable PA systems, high-output multimedia speakers |
Verify crossover frequency, slope, driver impedance, phase alignment, limiter behavior, and total power allocation. |
| Wireless-Enabled Active Module |
10–100 W continuous per channel |
Typically 60 Hz–20 kHz for compact systems |
Usually ≤0.1% at moderate output |
85–100 dB, A-weighted |
Bluetooth, Wi-Fi, analog auxiliary input, USB charging or service port |
High amplifier efficiency; radio operation increases standby power requirements |
Consumer audio, meeting rooms, education and hospitality spaces |
Check regional radio certifications, supported profiles, pairing security, antenna placement, and standby power consumption. |
| Battery-Powered Active Module |
20–200 W continuous output |
Approximately 50 Hz–20 kHz, depending on cabinet size |
≤0.1%–1% depending on battery level and output |
80–100 dB, A-weighted |
Analog input, wireless audio, microphone input, charging input |
Efficient Class-D amplification; battery and charger generate additional heat |
Mobile presentations, outdoor events, emergency and field applications |
Specify battery chemistry, capacity, operating time, charging cycles, transport requirements, and battery-replacement policy. |