Now hear this!

Are you and your session players and bandmates tired of straining to hear underpowered headphones? We were too, so we created the HP4 headphone-distribution system. These headphone amps are louder than you’re ever likely to need for session and stage use, so be careful with that level control! Yet the sound is clear and clean, with a wide dynamic range. At last, everybody will be able to hear!

Simple and versatile

Simplicity is the HP4’s hallmark. You get left and right line inputs, left and right line outputs with level control, and the four headphone outs. You can globally mute the headphone outs and sum the stereo signals to mono, adjust the individual headphone levels, and mute the rear-panel Monitor outputs while leaving the headphone outputs active. So while the HP4 is simple to set up and use, it has all the features you need to create a versatile headphone system.

Compact and expandable

The compact HP4 can sit on a tabletop or can be screw-mounted to a standard rack tray (not included), where it requires just 1/3 rackspace. And if your needs grow, you can use the line outputs to feed the inputs of a second HP4 or the larger HP60 headphone amplifier. So quit struggling with mediocre headphone amps. Get the HP4 and hear everything loud and clear. You owe it to your music.

Input/Output

  • 4 screaming-loud (150 mW per channel) stereo ¼” headphone outputs (front panel)
  • 2 balanced ¼” line outputs (monitor outputs)
  • 2 balanced ¼” line inputs

Meters, Controls, and Features

  • Headphone level control for each channel
  • Mono summing switch for each channel
  • Monitor level control
  • Monitor mute switch
  • Daisy-chain multiple units via monitor outputs

Physical

  • Compact 1/3U rack-mount chassis
  • Sealed, detented, metal rotary controls
  • External 16 VAC power supply

Inputs

  • Connector Type: ¼” TRS, balanced
  • THD+N: 0.0025%, 1 kHz, unity gain
  • Max Input Level: +18 dBu, <0.5% THD+N, unity gain
  • Input Impedance: 10 kΩ
  • Frequency Response: 20 Hz - 20 kHz, ±0.5dB

Monitor Outputs

  • Connector Type: ¼” TRS, asymmetrical, impedance-balanced
  • THD+N: 0.0025%, 1 kHz, unity gain
  • Max Output Level: +18 dBu, <0.5% THD+N
  • Output Impedance: 51Ω
  • Frequency Response: 20 Hz - 20 kHz, ±0.5dB

Headphone Outputs

  • Connector Type: ¼” TRS, stereo
  • Max Output Power: 130 mW/Ch., <0.5% THD+N, 60Ω load
  • Frequency Response: 20 Hz - 20 kHz, ±0.5 dB, 60Ω load
  • Headphone Impedance Working Range: 32Ω - 600Ω

Power

  • External Adapter Type: +12 VDC, 1000 mA, center pin positive

Physical

  • Dimensions: 1/3U rack-mount (with standard rack tray, not included)
  • Height: 1.75” (44.45 mm)
  • Depth: 5.5" (139.7 mm)
  • Width: 5.5” (139.7 mm)
  • Weight: 5 lbs (2.27 kg)
  • MPN: 125085
  • UPC: 673454000423

Audio MIDI Plus is committed to deliver the best experience for our customers. If for some reason you are not satisfied with your purchase, you may return it for a refund of the purchase price, an exchange or a store credit within 30 days from the ship date. 

In the unlikely event that you received a defective product, a wrong product, or damaged product, Audio MIDI Plus will replace it at no charge of any additional shipping cost. We will send you a prepaid label to return the item, and ship you a replacement. You will not incur any shipping charges. Please notify us of any of damaged, defective or misshipped products within 14 days.

After 30 days, you may request manufacturer warranty if your item malfunctions. Unless otherwise specified, Audio MIDI Plus is an authorized dealer for all the brands we represent.

How to request a return:
Please email us or call us to obtain a RMA number. All returns must be in a re-sellable condition and include all packing materials, accessories and paperwork. We may apply a restocking fee if the returned products fall into these following categories:

  • Missing original packaging, manuals, accessories, or any contents that was included
  • RMA number was not associated with the return
  • Items not in original like new condition

Please send all returns to:
Audio MIDI Plus Returns
3725 Saddle Drive,
Carlsbad, CA 92010

The following items are not returnable, unless received DOA, in which we will send a replacement:

  • Software
  • Electronic Delivery of Software
  • Special orders
  • DVD’s

Items that fall into the in mouth and in ear use category, such as mouthpieces, earphones, ear plugs, harmonicas, cannot be returned due to health regulations

Thank You for shopping with us!

If your item is eligible for shipment outside of the United States, Tax, Duty, and/or VAT and brokerage fees are the buyer's sole responsibility. Please check with your local authorities to assess these extra fees.

Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyer's responsibility. Please check with your country's customs office to determine what these additional costs will be prior to bidding or buying.

International Friends: If you refuse a delivery due to Tax and/or Duty, we reserve the right to refund you only when the package is successfully returned back to us, and MINUS all shipping charges

Most software items are now Electronic Delivery Only. Once payment is received, we will Email you the necessary codes and/or download links. Please be sure to check your junk mail and spam folders for this Email.

While most items are in stock either in our retail store or fulfillment warehouse in Carlsbad, CA, in some cases items may need to be ordered and/or drop shipped from the manufacturer. Please allow 3-10 days for order processing, fulfillment, and setup, as well as transit and delivery time. Tracking will be available within 48 hours in most cases.

Please call us at (844) 577-4502 10AM-6PM PT M-S for an IN-HAND description of the item that you are interested in. We are always happy to help, and look forward to speaking with you if needed. Live Skype may also be available for you.

Related Products

< >