Pro Co HJ4P Four Output Headpone Junction Box


Pro Co

$ 179.99


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  • Pro Co HJ4P Four Output Junction Box

    The Pro Co TradeTools HJ4P Professional Headphone Junction Box is designed to provide trouble-free distribution and control of audio signals from stereo power amplifiers to up to four sets of 150-600O stereo headphones (lower impedance phones may be used with some loss in power efficiency). The HJ4P is intended primarily for use in recording or broadcast studios to deliver cue or foldback mixes to groups of musicians or vocalists. It may also be used in sound reinforcement systems where headphones for hearing-impaired individuals are required.

    The XLR-type input and loop- through connectors are compatible with most studio cue system outputs, and permit the HJ4P to be connected with standard low-impedance microphone cables. The loop-through function allows multiple HJ4Ps to be “daisy-chained” if necessary. The STEREO/MONO and LEFT/RIGHT switches allow the HJ4P to be used to select either a stereo cue mix, or either of two monaural mixes. This is very useful in tracking sessions when, for example, the drummer may require a drastically different mix from the rest of the musicians. This feature could be used in bilingual sound reinforcement applications, with the speaker’s voice on one channel and a translator’s on the other. The LEFT VOL and RIGHT VOL controls allow stereo balancing to be individually tailored, and by switching to MONO and turning one VOL control to minimum a mix can be delivered to one ear only, leaving the other free for “natural” listening.

    The four 1/4” (6.3mm) headphone outputs are individually isolated with resistors to prevent the amplifier output from momentary short-circuits when plugging in or out, thus eliminating annoying pops from the cue system. Resistive isolation also prevents one defective set of headphones from affecting the levels of the others, or from completely “shorting out” the system.

    The HJ4P is ruggedly constructed of 16 gauge steel, painted with durable black semigloss epoxy paint, and has all controls and connectors clearly identified with white silkscreened labels. All components are of top-grade quality, including the sealed “J”-style level controls and the miniature “rocker” switches. The heavy base and non-skid feet prevent tip-over problems, and the enclosure design effectively recesses all controls and connectors to prevent accidental damage.


    • For studio cue systems or sound reinforcement
    • XLR input and loop out
    • Left/Right switch selects 1 of 2 mono mixes
    • Mil-Spec left and right volume controls
    • Resistive isolation protects amplifier
    • Heavy-duty steel enclosure
  • We understand that when you make an order, you want your gear as quickly as possible and we'll do our best to make that happen! Most of the items we sell will ship quickly and be at your door fast. In most cases, orders ship within 1-3 business days. Shipping and delivery dates are not guaranteed unless otherwise specified.

    Most orders $100 and over qualify for FREE shipping within the Continental United States. Some exclusions may apply.

    See our full Shipping Policy for further details.

    Buy Online, Pick Up In Store

    Most orders are usually ready within 24 hours for same-day pickup or get free shipping to your local store. Just choose the "Ship to store" option at checkout.

    See our full Shipping Policy for further details.

    Local Same Day* Delivery to your Doorstep

    Get your musical dreams filled faster! - Get Same Day Delivery starting at $35*

    Making your online shopping a little easier. We offer an easy “Order Online, Deliver to your Doorstep”.

    This service is currently available for these towns within California: San Rafael, San Anselmo, Fairfax, Larkspur, Greenbrae, Corte Madera, Novato, Sausalito, Belvedere/Tiburon, Ross, Kentfield, and Mill Valley. Shipping rates are shown at checkout. Got questions?... Contact us!

    *Get same day delivery for instock orders received and processed by 2pm, otherwise will deliver the following business day. Delivery fee is based on weight, delivery location and courier fees. Any amounts over $35 - You will be notified to approve before delivery. This is a convenience option only. Deliveries are by a 3rd party delivery service and will deliver to doorstep only. By accepting this delivery process you hereby indemnify Bananas At Large Inc of all responsibility as Bananas At Large is not the delivery agent and assumes no liability on lost or stolen products.

    By choosing this option you understand and agree to the following terms:

    • Some restrictions apply. For in-stock & available items only.
    • You are requesting Bananas at Large to contract on your behalf with a 3rd party service.
    • Bananas At Large guarantees the product to be delivered to your doorstep, with photo proof of delivery.
    • Bananas cannot and is not responsible for the package safety or security once it is delivered to your doorstep.
    • You understand and accept the risk and responsibility of your package once it is delivered.
    • Large items, overweight items may incur additional charges.
    • Certain delivery zones and homes with access issues may incur additional charges or may not qualify for delivery.
    • If the last inventory unit is located at our Santa Rosa store location, there may be a delivery delay that may take an additional business day to have it transferred down to our San Rafael location.

    Local Pickup Only

    Some products are available for local pickup only. If you’d like this item shipped, please call or text us at 1 (888) 900-1959 to discuss shipping options. 


    Bananas does not warranty tubes in transit. We offer tube removal and individual bubble wrap service for $45 per customer request (for standard amps, more complex amps that take more time may be a higher fee). Customers buying any tube product and having it shipped should understand and realize that Bananas cannot be responsible for damaged tubes from transit. This applies to all new and used products. Certain manufactures offer a tube warranty on their new products as a courtesy, and that is available thru the manufacturer warranty process for all new products where it applies.


    Any new item (other than as noted in our full Return Policy) purchased from Bananas at Large may be returned within 14 days of the invoice date, for a full refund, exchange or credit. All Pre-Owned Products may be returned in 48 hours. All Clearance, “additional mark down”, additionally discounted, “blow out”, “door buster” or otherwise identified as on sale are all sales final.

    For online orders, the above return policy begins on the day the items were delivered. We must receive an active tracking number within the specified time.

    See our full Return Policy for all of the pertinent details.


  • Play now & Pay later!

    Make music more affordable with these easy payment plans. It only takes a few minutes to apply or just choose the payment option at checkout. Bananas at Large offers these online and in-store financing options: Affirm, QuadPay, Acima Credit, GetFinancing, Synchrony and more!

    Click Here for details.

  • Clyde Extended Warranty

    Bananas has teamed up with Clyde to offer product protection. Clyde partners with A-rated insurance carriers to offer warranty coverage on your musical instrument or audio equipment.

    How does it work?

    • Warranty coverage will replace or repair your product if your equipment or instruments breaks.
    • To purchase, select the term-length and review the summary of coverage.
    • After purchase, you’ll receive your contract via email.
    • To file a claim, visit and submit the contract ID found in your email.

    What’s Covered?

    • Power Surges
    • Wear and Tear

    Learn more


Warning: Some of the products purchased at Bananas At Large can expose you to chemicals, which are known to the State of California to cause cancer and/or reproductive harm. For more information go to