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AudioSource AMP310VS

Stereo multi-source power amplifier

Item # 021MP310VS

This amp provides a ton of juice to drive your power-hungry speakers.

This amp provides a ton of juice to drive your power-hungry speakers.

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About the AudioSource AMP310VS

Kramer Crane

A powerful amp with flexible options

Need a ton of juice to drive your power-hungry speakers? The AudioSource AMP310VS power amp combines robust amplification with useful customization and control options. Use it as a standalone amp in a stereo music system. Or connect it to your home theater receiver's zone 2 output to drive speakers in other parts of your house.

A powerful amp with flexible options

Need a ton of juice to drive your power-hungry speakers? The AudioSource AMP310VS power amp combines robust amplification with useful customization and control options. Use it as a standalone amp in a stereo music system. Or connect it to your home theater receiver's zone 2 output to drive speakers in other parts of your house.

Easily play music in two rooms

The AMP310VS is a great amp for setting up a two-room music system. It can drive two separate pairs of speakers connected to its A and B binding posts. Play music indoors through one set of outputs, and listen to the same source outside through the other set. When it's time to come inside for the night, simply switch off the outdoor pair and let the party continue inside. 

AudioSource AMP310VS stereo multi-source power amplifier

The AudioSource AMP310VS power amp offers two pairs of high-quality speaker connections.

Lots of power under the hood

At its heart, the AMP310VS is an old-school power amplifier. It offers 150 watts of continuous power per channel when connected to a pair of eight-ohm speakers. It also cranks out 225 watts at four ohms.

Want to bridge the channels and use it as a mono amp for a single speaker? You'll get a whopping 450 watts of clean power from this amp. 

Multiple source and power-on options

The '310VS offers two pairs of analog RCA inputs for your music sources, and can switch sources automatically when a signal is detected. It can be set up to automatically turn on when it detects a source, or you can turn it on manually.

This amp is also 12-volt trigger compatible, so you can have it turn on when another piece of equipment is fired up. Rear-mounted bass and treble controls provide tone adjustment for your room.

Never worry about blowing your speakers

One of the features I like the most about the AMP310VS is the ability to set maximum volume limits. These let you set a volume "ceiling" for each channel, so even if some over-enthusiastic listener maxes out the volume knob on the front of the amp, there won't be any damage to the speakers.

This is a great way to make sure that guests or kids don't accidentally turn the system up to distortion levels.


Product highlights:

  • 150 watts per channel into 8 ohms (10-30,000 Hz) at 0.2% THD with 2 channels driven
  • 225 watts x 2 into 4 ohms
  • 450 watts (mono) in bridged mode
  • high-current Class AB amplifier design
  • ideal for use as a second zone amplifier
  • front-panel volume and balance controls
  • front-panel A/B speaker switching
  • rear-panel bass and treble controls
  • main and secondary ("Interrupt") audio line inputs with automatic source switching
  • loop output on the main line input passes that audio signal on to another amp, giving you flexibility in designing a multi-room system
  • speaker-level input allows integration into an existing system where no RCA level signal is present
  • master volume feature allows installer to set maximum volume so connected speakers cannot be distorted or damaged
  • adjustable delay so that the amp doesn't switch to another source at the end of a song
  • signal-sensing "Power On" and 12-volt Trigger modes
  • auto-on select switch allows manual or signal sensing power on/off
  • front-panel dual LED indicator and diagnostic lights
  • rear-panel dual voltage switch (115 and 230 volts)
  • frequency response: 10-30,000 Hz (+0 dB, -3 dB)
  • signal-to-noise ratio: 100 dB
  • binding post A and B speaker connectors
  • rack-mountable
  • 16-1/2"W x 5-1/2"H x 13-3/4"D
  • weight: 33.1 lbs.
  • warranty: 3 years
  • Our 60-day money-back guarantee
  • MFR # AMP310VS

What's in the box:

  • Stereo power amplifier
  • 6' AC power cord
  • 2 Rack-ear mounts
  • 6 Screws
  • Owner's Manual

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More details on the AudioSource AMP310VS

Stacey B.

Features & specs

Number of Channels 2
Power Output per Channel (8 ohms) 150
Power Output per Channel (6 ohms) ---
Power Output per Channel (4 ohms) 225
Frequency Bandwidth 10-30k
THD 0.2%
Minimum Impedance 4
Bridged Power per Channel 450 watts
Speaker Outputs 4
THX Certification No
Width (inches) 16-9/16
Height (inches) 5-1/2
Depth (inches) 15-13/16
Weight 33.1 pounds
Parts Warranty 3 Years
Labor Warranty 3 Years
Inputs & Outputs
Number of Inputs 3
Input Type RCA, Speaker-Level
Removable Power Cord IEC 3-prong
Level Controls Yes
Speaker Connectors Binding Post

Product Research


AudioSource Amp Series: AudioSource AMP series amplifiers are designed for home and commercial audio distribution systems where high quality sound, flexibility, and reliability are essential. The AMP series offers exceptional value and many features that will make their installation and use easy and convenient.

Stereo Power Amplifier: The AudioSource AMP310VS stereo power amplifier is designed for dedicated stereo & distributed audio applications. It offers A & B speaker outputs. The amplifier can be configured for Stereo or Bridged output.

  • Stereo (8-ohm): 150 watts x 2 channel, 10-30kHz, <0.2% THD+N
  • Stereo (4-ohm): 225 watts x 2 channel, 10-30kHz, <0.2% THD+N
  • Bridged Mono (8-ohm): 450 watts x 1 channel, 1kHz, <0.2% THD+N

Front-Panel Controls: The AudioSource AMP310VS stereo power amplifier features the following front-panel controls.

  • Power Switch: The front-panel Power Switch turns the AMP310VS on or off. A red LED indicates connection to AC power while in standby mode and turns green indicating audio signal is present.
  • Volume: The front-panel rotary volume knob allows you to adjust the amplifier's overall volume level.
  • A/B Speaker Selector: You can select Speakers A, Speakers B, or Both for playback.
  • Balance: The Balance control lets you fade the amplifier's speaker output between the Right & Left channels.

Rear-Panel Controls: The AudioSource AMP310VS offers the following rear-panel controls.

  • Master Level: The Master Level control sets the overall power output level and upper limit of the amplifier's left & right channel outputs, independently.
  • Bass & Treble: Bass (100Hz) & Treble (10kHz) can be adjusted from -12dB to + 12dB.
  • Stereo or Bridged Mode: Select Stereo mode for connecting one or two pair of loudspeakers. When set to Bridged mode, the AMP310VS becomes a single channel mono amplifier for powering one speaker. Only the Right audio input is used during bridged-mode. Only one zone (A or B) can be bridged; not both.
  • Delay Time: Allows for a 3 to 15 second delay to be set when switching between the amplifier's Main and Interrupting line inputs.
  • Power Mode: Set the Auto On switch to Normal for manual power on/off. Set the Auto switch to Auto for signal sensing; the amp will turn on when audio signal (>5mV) is detected at the inputs The front-panel power switch must be in the On position (pushed in) for the Auto On feature to operate. Or, select 12V Trigger which allows the AMP310VS to be powered on by other electronic component or to power on other electronics via a 3.5 minijack cable (between 3-20VDC).

Rear-Panel Connections: The AudioSource AMP310VS digital stereo power amplifier is equipped with the following inputs & outputs.

  • Main Input/Output: The AMP310VS Main Input consists of stereo RCA jacks and are used as the amplifier's primary audio inputs. The Main Output also consists of stereo RCA jacks and passthrough the AMP310VS's Main Input audio signal to another amplifier.
  • Interrupting Line Input: The Interrupting Input consists of stereo RCA Jacks. This input can be used if a second source is desired and takes over when signal is present and has at least a 5mV level. When there is no signal, or a signal with less than 5mV level, the amp switches back to Main input after a brief delay.
  • Speaker-Level Inputs: The spring-clip speaker-level inputs can be used to connect a source with speaker-level output instead of line-level outputs. Route this high-level input signal to either the amplifier's Line 1 or Line 2 input.
  • Speaker A/B Terminals: The AudioSource AMP310VS is fitted with binding-post terminals for A & B speaker connection for powering up to two pair of speakers. The minimum impedance for each speaker section is 4-ohm in Stereo mode and 8-ohm in Bridged mode. The binding post terminals will accept bare wire (up to 10AWG), pin-connectors, and banana plugs (single or dual).
  • Trigger In/Out: The 12V trigger input and output allow the AMP310VS to be powered on by other electronics or to power on other electronics via a 3.5mm minijack cable.
  • Power Cord: The stereo power amplifier features a detachable 6' AC power cord (IEC 3-prong).

Front-Panel LEDs: The AudioSource AMP310VS features front-panel LEDs to indicate Power/Standby, Audio Signal, and Clipping.

  • Power/Standby Indicators: Red LEDs behind the faceplate indicate power status. Whenever the amplifier's power switch is in the "On" position the ring around the button is illuminated. During "Standby" status (no signal) the side lenses are not illuminated and the signal LEDs show orange.
  • Audio Signal Indicators: When the amp is "Active" (receiving signal) the side lenses become illuminated and the signal LEDs show green.
  • Clipping Indicator: There are two LEDs on the front-panel of the AMP310VS that indicate signal clipping on the left and right channels of the amplifier.

Mounting Options: The AudioSource AMP310VS stereo power amplifier features four rubber feet and can simply be placed on top of a flat surface; like a table-top, shelf, or stand. It can also be rack-mounted (rack-ears included).

Applications: The AudioSource AMP310VS can be used a remote amplifier, single or dual zone amplifier, rear channel amplifier for a home theater setup, or a stand-alone stereo amplifier.

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Customer Q&A

10 questions already asked

I plan to power two SVS ULTRA TOWER speakers with two of these amps Bridged as a mono amp. I know the speakers are rated at 300 watts in 8 ohms. Is this to much amp? Right now I am powering them with a Yamaha RX-2060 140 watts by two and I would like to get a little more out of them.
[ William  Mar 27, 2023 ]
1 answer
Technically speaking William, The AudioSource would be overpowering each tower in bridge mode by about 150-watts. Since the AMP310VS does come with a rotary volume knob and rear panel master level control, you could certainly set these up properly for your SVS Ultra Towers and also use discretion when listening loudly. I have personally been a huge AudioSource fan for years, reliable and extremely potent amplifiers! Dual AMP310VS's would be an excellent way to increase the wattage to your speakers without breaking the bank.
[ Bo  Mar 28, 2023 ]  Staff
Can this amp run A/B speakers when it is in bridge mode?
[ William  Mar 27, 2023 ]
1 answer
When in bridged mode, this unit is not designed to run both A and B speakers. Technically, you could have A or B going if both terminal sets are connected to speakers in a bridged configuration.
[ ZACHARY  Mar 27, 2023 ]  Staff
Will this amp hold up to running two passive subwoofers? 4ohm rated at 300 watts RMS. I plan on dialing back the master volume a little. Thoughts?
[ MARK A.  Jan 20, 2023 ]
1 answer
This amplifier with provide 225 watts x 2 into 4 ohms. Although this is somewhat less than the subwoofers are rated to handle, it would generally be considered within the margin of acceptable power output. This should work nicely, but our advisors would be happy to review the project in more detail via online chat or phone at 1-800-324-9695.
[ ZACHARY  Jan 20, 2023 ]  Staff
Would this AudioSource AMP310VS work well as a subwoofer amp? (LFE from pre amp.. powering two 150 watt rms subs.. ((would verify their impedance prior to purchase.))
[ James  Oct 11, 2022 ]
1 answer
Greetings Boom Boom, and thank you for your question. If your subwoofers are 8 ohms, and rated for the 150 watts, that amp will run them at their full capacity.
[ THOMAS  Oct 11, 2022 ]  Staff
can i use a pra sound pre amp with the amp 310vs ?
[ TIMOTHY  Jun 26, 2022 ]
1 answer
Greetings Tim, and thank you for your question. You can use any preamp that has an RCA type connection for the output.
[ THOMAS  Jun 26, 2022 ]  Staff
Can A pre-amp like the Denon 600 NE be used with this amplifier?
[ M.  Feb 21, 2020 ]
1 answer
I run mine off a Denon 3400h. Just tapped into an audio out port and began rocking 2 more speakers in 9.2.
[ RONALD  Mar 11, 2020 ]
how many microfarads per channel ? AMP310VS
[ mohan  Mar 08, 2019 ]
1 answer
This is not a published specification by the manufacturer. You can reach their Customer Support department by dialing: 877-715-5439
[ Ryan  Mar 16, 2019 ]  Staff
My Marantz seems to be a big longer and wider, will it be ok to put this amp on top? Thanks
[ FELIX  Feb 22, 2019 ]
1 answer
They vent the heat through the top and that can lead to more heat buildup with the amp on top. I don't recommend stacking anything on top of an amp or a receiver My Bio:
[ JASON  Mar 04, 2019 ]  Staff
what happens to wattage if you play both A & B or two pair? Do they each get 25% of total? Is this safe? So could this be a 300x1 150x2 or 75x4?
[ Tom4M  Feb 21, 2019 ]
2 answers
I run both A+B at the same time. I was told by Crutchfield that running both at the same time turns this into a 4ohm system. I'm running 2 Marantz Imperial 7s 8ohm loud speakers and 2 8ohm Technic SB CR77s. All for have 12in subs. I play for hrs and I jam. I've had this amp and set up for over a yr and I've had no issues. VERY happy with it.
[ Bryan  Feb 21, 2019 ]
It probably won't help you, because I've had the same question. I want to drive 4, 120 watt speakers with this power amp. The best I can guess is that each speaker is going to receive 75 watts. i.e. 75x4. I've had reasonably large tuners in the past, and seldom had the volume past 50%; these 4 speakers did fine. Now I want to drive the same speakers with this thing. I'll hook it up tomorrow and if there's a way for us to stay in touch I'll let you know.
[ Steven  Feb 21, 2019 ]
Can you run this in bridged mode with 4 ohm speakers without taxing the amp?
[ Tsar Bomba  Oct 06, 2017 ]
1 answer
I'm afraid not. AudioSource lists the minimum bridged impedance at 8-ohm for this AMP310VS model. There may be another amplifier better suited for your 4-ohm speaker(s) though--please feel free to contact an Advisor by phone (888.955.6000) or online chat to discuss other amplifier options in more detail.
[ DAVID  Oct 10, 2017 ]  Staff

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