How many headphones can it drive at once?

Up to eight. Each of the four channels has a 1/4-inch and a 3.5 mm output wired in parallel, so two headphones can share each channel.

Can I use it with high-impedance studio headphones?

It is rated for a minimum 16-ohm load with 20 dB maximum gain per channel. Very high-impedance headphones may play quieter than on a dedicated studio amp.

Does it need a wall outlet?

No. It runs from a 5V USB supply, so a laptop USB port or a power bank can power it.

Can I switch between stereo and mono?

Yes. A stereo/mono switch lets you feed both ears the same signal, useful for checking a mix or for single-ear monitoring.

What connections does it accept?

One 1/4-inch and one 3.5 mm input, feeding all four channels.

What comes in the box?

The amplifier, a USB-to-barrel-jack cable, a 5V USB power supply, an owner's manual and a warranty card.

Rockville RHPA4 4 Channel Professional Headphone Amplifier Stereo or Mono Amp

Best price now

$34.95at WalmartChecked Nov 9

Prices are checked against each store and labelled with when.

Visit Walmart

Rockville RHPA4 4 Channel Professional Headphone Amplifier Stereo or Mono Amp

Best price now

$34.95at WalmartChecked Nov 9

Prices are checked against each store and labelled with when.

Visit Walmart

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Price facts

Last seen at $34.95 at Walmart on Nov 9.

Our take on the Rockville RHPA4 4 Channel Professional Headphone Amplifier Stereo or Mono Amp

The Rockville RHPA4 is a compact 4-channel headphone amplifier for splitting one source across several listeners. Each channel has its own volume knob, and each channel carries both a 1/4-inch TRS and a 3.5 mm output wired in parallel, so up to eight headphones can run at once. A stereo/mono switch and 1/4-inch plus 3.5 mm inputs cover studio, podcast and band setups. It is a metal-cased desktop box powered over USB, so a power bank or laptop can run it. Against studio headphone amps it trades channel count and balanced I/O for simplicity and a very small footprint.

Best forSmall studios tracking several players at oncePodcast and streaming setups with multiple guestsBands rehearsing or recording togetherAnyone powering an amp from a laptop or power bank

Pros

Four channels, each with its own volume control
Two headphone jacks per channel, so up to eight listeners
Stereo or mono switch for checking mixes
1/4-inch and 3.5 mm inputs and outputs
Metal shell and USB bus power for portability

Cons

No balanced inputs or outputs
Max gain of 20 dB per channel is modest for high-impedance headphones
USB power supply only; no internal battery
Small knobs and a compact layout can feel cramped

Rockville RHPA4 4 Channel Professional Headphone Amplifier Stereo or Mono Amp prices at every store

WalmartNew
In stockSold by AudiosavingsReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
$34.95Free shippingChecked Nov 9
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About the Rockville RHPA4 4 Channel Professional Headphone Amplifier Stereo or Mono Amp

The Rockville RHPA4 is a 4-channel professional headphone amplifier for studio recording, podcasting, bands and similar uses. It accepts ¼" and 3.5 mm inputs and has a Stereo or Mono switch.

It has four ¼" TRS and four 3.5 mm headphone outputs, wired in parallel. This lets you run 8 headphones, 2 per channel. Each of the 4 outputs has its own volume control, using a high-quality potentiometer knob. A power LED shows when the unit is on.

The casing is thick metal, and rubber feet are fitted. The amp runs on 5V DC and has low power consumption. It is bus powered, so it can draw power from a power bank or from the USB port of a computer or laptop.

Channels: 4
Inputs: ¼" and 3.5 mm
Outputs: 4 x ¼" TRS, 4 x 3.5 mm, run in parallel (up to 8 headphones, 2 per channel)
Modes: Stereo or Mono switch
Controls: Individual volume knob for each output
Power: DC 5V via USB, 1000 mA; bus powered
Input impedance: 22K ohm
Max input level: +22dB
Output impedance: Min. 16 ohm
Max gain: 20dB per channel
S/N ratio: >98dB; >90dB (ref 0dBu)
Frequency response: 20 Hz - 20 kHz
Casing: Thick metal shell
Color: Black
Dimensions: 4.6" x 3" x 2.36"
Weight: 0.85 lbs
In the box: Headphone amplifier, USB to barrel jack cable, DC 5V USB power supply, owner's manual, warranty card

Specifications

color: BlackSource
size: 4.6 x 3 x 2.36Source

Questions and answers

How many headphones can it drive at once?: Up to eight. Each of the four channels has a 1/4-inch and a 3.5 mm output wired in parallel, so two headphones can share each channel.
Can I use it with high-impedance studio headphones?: It is rated for a minimum 16-ohm load with 20 dB maximum gain per channel. Very high-impedance headphones may play quieter than on a dedicated studio amp.
Does it need a wall outlet?: No. It runs from a 5V USB supply, so a laptop USB port or a power bank can power it.
Can I switch between stereo and mono?: Yes. A stereo/mono switch lets you feed both ears the same signal, useful for checking a mix or for single-ear monitoring.
What connections does it accept?: One 1/4-inch and one 3.5 mm input, feeding all four channels.
What comes in the box?: The amplifier, a USB-to-barrel-jack cable, a 5V USB power supply, an owner's manual and a warranty card.
Where is the Rockville RHPA4 4 Channel Professional Headphone Amplifier Stereo or Mono Amp cheapest?: At Walmart, for $34.95, as of our latest check.