Real power for the speakers that do the hard work.
The BasX A5+ Five-Channel Power Amplifier adds dedicated amplification to your main home theater speakers: left, center, right, and surrounds. That takes the load off your receiver, so it can focus on processing and control instead of trying to power everything at once. The payoff is cleaner dynamics, clearer dialogue, and a system that stays composed when scenes get loud.
The A5+ is rated at 95 watts RMS per channel into 8 ohms (20 Hz to 20 kHz, all channels driven, THD < 0.02%). Inside, a fully discrete Class A/B output stage and a linear power supply with a heavy duty toroidal transformer deliver stable, confident power without sounding edgy or strained.
The major BasX Plus upgrade is connectivity. The A5+ includes balanced XLR and unbalanced RCA inputs on every channel, so it pairs easily with everything from traditional AVRs to fully balanced processors. If your gear supports XLR, it can help keep things quieter, especially with longer cable runs. If not, RCA has you covered.
Built-in protection guards against common fault conditions, 12V trigger connections make system power control easy, and the A5+ is rated for 8 ohm speakers while supporting 4 ohm operation.
Common Uses
The power amplifier can be used to power a complete 5.1-channel speaker system when paired with a processor or an AVR featuring pre-outs. It can also upgrade an existing AVR setup by powering the main five speakers, providing greater headroom, control, and performance. Alternatively, it can power the LCR and surround speakers while allowing the AVR to handle the height channels.
Product Features
Product Features
Five Channels of Clean Power
The BasX A5+ delivers five dedicated Class A/B amplifier channels, providing 95 watts RMS per channel into 8 ohms with all channels driven. This gives your system improved control, cleaner dynamics, and reliable power during demanding movie and music sessions.
Balanced Inputs Included
Each channel features both balanced XLR and unbalanced RCA inputs, offering flexible connectivity with a wide range of audio equipment. XLR connections can also help reduce noise, particularly when using longer cable runs.
Toroidal Power Supply
A heavy-duty toroidal transformer and linear power supply provide stable current delivery to the amplifier. This helps maintain firm, controlled bass and clean performance during demanding listening levels.
Easy to Connect
The amplifier features audiophile-grade 5-way binding posts that support banana plugs, spade connectors, and bare wire. Trigger input and output connections also make it easy to integrate the amplifier with the rest of your home theatre system.
4-Ohm Capable
The BasX A5+ supports speakers with a minimum impedance of 4 ohms, making it compatible with a wide range of speakers. Built-in protection helps safeguard the amplifier against overheating, short circuits, ground faults, and other common operating conditions.
Technical Specifications
| Specification |
Details |
| Model |
BasX A5+ |
| Power Output Per Channel (All Channels Driven) |
95W RMS / Channel (20Hz–20kHz, THD <0.02%, 8Ω)130W RMS / Channel (1kHz, THD <1%, 4Ω) |
| Input Sensitivity |
1.2V (for Rated Power, 8Ω Load) |
| Gain |
29dB |
| Power Bandwidth |
20Hz – 20kHz (+/−0.07dB) or Better |
| Broadband Frequency Response |
5Hz – 80kHz (+0 / −1.8dB) |
| THD + Noise |
<0.02% (A-weighted, Rated Power, 1kHz, 8Ω) |
| Signal-to-Noise Ratio |
>112dB (Referenced to Rated Power, A-weighted)>95dB (Referenced to 1W, A-weighted) |
| Load Impedance |
Minimum: 4ΩRated: 8Ω |
| Damping Factor |
>500 (8Ω Load) |
| Speaker Output Connections |
Audiophile-Grade 5-Way Binding Posts |
| Power Supply |
Linear Power Supply with Heavy-Duty Toroidal Transformer |
| Input Connections |
Unbalanced (RCA): 1 per ChannelBalanced (XLR): 1 per Channel |
| Input Impedance |
27kΩ |
| Trigger Input |
5–12V (AC or DC), <10mA Input Current |
| Trigger Output |
12V DC, up to 120mA |
| Power Requirements |
115VAC or 230VAC, 50/60Hz (Automatically Detected) |
| Protection |
Protection against excessive operating temperature, shorted speaker connections, ground faults and other common fault conditions |
| Dimensions (W × H × D) |
17 × 4.25 × 15.5 in. (Unboxed, including feet)17 × 3.5 × 15.5 in. (Unboxed, without feet) |
| Weight |
25.2 lbs (Unboxed)32.2 lbs (Boxed) |
| Ventilation |
Adequate ventilation is required during extended high-power operation; vents should not be blocked |
