Expand your listening horizons with the black A-S501 Integrated Amplifier from Yamaha. Featuring up to 100W per channel of RMS power at 6 ohms, this amp is equipped with digital inputs for connecting devices like televisions and Blu-ray/DVD players. It offers dual stereo outputs, giving you the ability to power two sets of speakers in different rooms and switch between them, or have them both playing at the same time. To increase the bass output of your sound system, there’s also a terminal for connecting a subwoofer.
To reduce distortion and degradation and produce the cleanest possible sound, the A-S501 employs Pure Direct Mode. Activated via a button on the front of the unit, this mode causes input signals to bypass unused circuits and cuts off those circuits’ power supply. To further ensure quality sound, the amplifier’s continuously variable loudness control allows you to balance low and high frequency sounds so you can hear a full tonal range at any volume.
This Yamaha amplifier was built with energy efficiency in mind, and uses a power management system to switch itself to idle mode when not in use. The A-S501’s internal circuitry mirrors itself symmetrically to produce higher signal purity and lower degradation. The chassis is reinforced with a solid center bar to reduce vibration and features a brushed aluminum front panel and knobs. The system comes with a remote control for easy operation.
Amplifier Type | Integrated Amplifier (Preamp/Power Amp Combo) |
Channels | 2.0 |
Power Output per Channel | 100 W at 6 Ohms / 20 Hz to 20 kHz / 0.038% THD (RMS) 85 W at 8 Ohms / 20 Hz to 20 kHz / 0.019% THD (RMS) |
Dynamic Power per Channel | 130 W at 8 Ohms 150 W at 6 Ohms 185 W at 4 Ohms 220 W at 2 Ohms |
Frequency Response | 20 Hz to 20 kHz ±0.5 dB (Pure Direct Mode) 10 Hz to 100 kHz ±1 dB |
Residual Output Noise | 40 µV (IHF-A) |
Tone Control | Bass (20 Hz): ±10.0 dB Treble (20 kHz): ±10.0 dB |
Damping Factor | ≥ 240 (8 Ohms, 1 kHz) |
Supported File Formats | PCM |
Supported Sample Rates | Up to 192 kHz (PCM) |
DAC | 192 kHz / 24-Bit |
Rear A/V Inputs | 5 x Stereo RCA 1 x Stereo RCA (Phono) with Ground Screw 1 x Optical TOSLINK 1 x Digital Coaxial |
Rear A/V Outputs | 2 x Stereo RCA 1 x RCA Subwoofer |
Front I/O | 1 x 1/4″ / 6.35 mm Headphone Output |
Other Rear I/O | 1 x USB Type-A (Power) |
Speaker Connectors | 4 x Binding Post Pair 4 x Binding Post Pair |
Input Impedance | Phono (MM): 47 Kilohms Line: 47 Kilohms |
Input Sensitivity | Phono (MM): 3 mV Line: 200 mV |
Max Input Level | Phono (MM): ≥ 45 mV (1 kHz / 0.03% THD) Line: ≥ 2.2 V (1 kHz / 0.03% THD) |
Phono RIAA EQ Deviation | ±0.5 dB |
Rated Output / Impedance | Headphone: 430 mV / 470 Ohms Line: 200 mV / 1 Kilohms Subwoofer: 3.5 V / 1.2 Kilohms |
Signal to Noise Ratio | Phono (MM): ≥ 82 dB (Input Shorted) Line: ≥ 99 dB (Input Shorted / Direct Mode) |
Total Harmonic Distortion (THD) | Phono (MM) to Line Out: ≤ 0.03% (20 Hz to 20 kHz / 2.5 V Input) Line to Speaker Out: ≤ 0.019% (20 Hz to 20 kHz / 45 W Output / 8 Ohms) |
Channel Separation | Line, Phono, RCA: ≥ 65 dB (5.1-Kilohm Input Shorted / 1 kHz) ≥ 50 dB (5.1-Kilohm Input Shorted / 10 kHz) |
Wi-Fi | None |
Bluetooth | None |
AC Input Power | 120 VAC, 60 Hz |
Power Consumption | Active: 240 W Maximum: 510 W Standby: 0.5 W |
Dimensions (W x H x D) | 17.1 x 5.9 x 15.2″ / 43.5 x 15.1 x 38.7 cm |
Weight | 22.7 lb / 10.3 kg |
Package Weight | 26 lb |
Box Dimensions (LxWxH) | 21 x 8.5 x 7.5″ |