Anthem P5 5-channel power amplifier with 325 watts per channel
Performance From The Heart
Edge-Of-The-Art Multi-Mono Design
By design, P2 and P5 amplifiers are powerful independent “monoblock” amplifiers. Each channel is self-contained on its own glass-epoxy circuit board and heatsink and benefits from an independent power supply. Since there is no common audio path between channels there is a complete absence of crosstalk. Frequency-response channel matching is superb. The musical picture is seamless and exquisitely detailed with a multichannel soundstage that is astonishingly transparent, cohesive and three dimensional.
Cascoded Complementary Feedback Input Stage
P2 and P5 amplifiers benefit from our proprietary input topology — a unique departure from the classical differential input stage. Eight low-noise bipolar input devices, hand-matched for superior balance, are configured in a complementary active-load cascoded feedback arrangement. Heat shrink tubing applied around each critical input pair ensures superior thermal tracking.
Designed to reduce distortion, this arrangement not only ensures exceptionally linear response, but also superior bandwidth and superb amplifier reliability.
Independent Power Supplies
P Series amplifiers are the cleanest, quietest amplifiers in the industry. Each amplifier channel features two separate and autonomous power supplies fed from separate transformer windings. The amplifiers are thus able to deliver stable, continuous power at maximum output, regardless of the number of channels being driven.
While some amplifiers tend to oscillate when driving lower impedance loads, the P2 and P5 remain perfectly stable under all conditions. If pushed into clipping, the proprietary anti-saturation tracking power supply circuit takes over to ensure a seamless recovery. Since the use of a regulated power supply in the driver stage removes noise emitted by the bridge rectifier (often heard as an audible hum at 120 Hz and its harmonics), the P2 and P5 achieve an utterly silent noise floor.
Massive Toroidal Transformers
Conservatively rated, in a low-profile design, these low-impedance toroidal power supplies—one per amplifier channel—make no sacrifices when it comes to delivering a continuous supply of pure, clean low noise power.
They are shaped to minimize hum while a sequence-controlled soft turn on significantly reduces power line transients and in-rush current during start up, thereby preventing accidental tripping of the circuit breakers.
“No Fuse” Design
P2 and P5 amplifiers are Direct-Connected to the power supply capacitor bank. This keeps output impedance remarkably low while making more power available to the amplifier. Even when driving lower- or complex impedance loads, the result is audibly superior performance. If an output short circuit does occur, only the AC line breaker will trip — there are no fuses to replace.
The standby low-power supply is protected by self-resetting Positive Temperature coefficient thermistors (PTCs). Once the condition that tripped the PTC disappears, the circuit restores itself automatically.
Oversize Gold-Plated Binding Posts
Our custom-designed binding posts are easy to use, ensure full power delivery at all times and facilitate large speaker cable connectors.
Three Power On/Off Options
P2 and P5 amplifiers can be powered On/Off three ways:
- Manually, with the On/Off switch on the front panel.
- Remotely, via the 12-volt trigger input on the rear panel.
- Automatically, with our patented Auto-On/Off circuit. Auto-On turns the amplifier on when it senses an input signal and turns off 20 minutes after the input signal ends.
RCA and XLR True-Balanced Inputs
A three-way switch on the amplifier’s rear panel offers an RCA input, a professional quality XLR balanced input and an attenuated XLR balanced connection (for preamplifiers that require it). Gold-plated female RCA jacks and gold-plated XLR balanced connections provide the highest quality input connections.
Oversize Aluminum Headsinks
With more than 1125 square inches (7258cm2) of computer modeled heatsink (including large serrated fins) per channel, P2 and P5 amplifiers are superbly equipped to dissipate the heat generated by their high power levels. This, in turn, eliminates the need for noise-inducing cooling fans. A thermal sensor on each heatsink continuously monitors safe operating temperature.
Designed and Built in North America
Fine-grain brushed aluminum cover and extruded aluminum handles. Heavy-gauge, low-resonance 12-awg steel chassis and oversize aluminum heatsinks generate serious high-end weight and authority.
IEC AC female sockets and detachable high-power, high-quality 14-awg AC power cords.
Can be ordered with rack-mount handles.
- 5 Single-Ended
- 5 Balanced
- 1 Relay Trigger (3.5 mm Mono Jack)
- 5 Pairs Speaker Binding Posts
- 1 Relay Trigger (3.5 mm Mono Jack)
- THD+N (225 W into 8 Ω) 0.0007% at 1 kHz, 0.008% at 20 kHz
- IMD: 0.00019% (CCIF, 325 W into 8 Ω)
- Power Bandwidth: 10 Hz to 150 kHz (+0 -3 dB, 325 W into 8 Ω)
- Frequency Response: 20 Hz to 20 kHz (+0 -0.15 dB)
- Input Sensitivity: (RCA and XLR 0 dB inputs) 1 Vrms in for 28.3 Vrms out (100 W into 8 Ω)
- Input Impedance: 18 kΩ (RCA), 22 kΩ (XLR)
- S/N Ratio: 125 dB, A-weighted (ref. 325 W)
- Dimensions (H x W x D): 23.8 x 49 x 57.2 cm
- Weight: 59 kg