PATCHBAY TIPS
WARRANTY
Limited Warranty
This warranty is valid only for the original purchaser. We warrant dbx products against defects in material or workmanship for a period of two years
from the date of original purchase for use, and agree to repair or, at our option, replace any defective item, except external power transformers, without
charge for either parts or labor.
IMPORTANT: This warranty does not cover damage resulting from accident, misuse or abuse, lack of reasonable care, the affixing of any attachment
not provided with the product, loss of parts, or connecting the product to any but the specified receptacles. This warranty is void unless service or
repairs are performed by an authorized service center. No responsibility is assumed for any special, incidental or consequential damages. However,
the limitation of any right or remedy shall not be effective where such is prohibited or restricted by law.
Simply take or ship your dbx product prepaid to our service department. Be sure to include your sales slip as proof of purchase date. (We will not
repair transit damage under the no-charge terms of this warranty.) dbx will pay return shipping.
NOTE: No other warranty, written or oral is authorized for dbx products.
This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. Some states do not allow the exclu-
sion of limitations of incidental or consequential damages or limitations on how long an implied warranty lasts, so the above exclusion and limitations
may not apply to you.
S
PECIFICATIONS
Patch Points: 48 (2 rows of 24)
Jacks: 1/4” phone, balanced or unbalanced, nickel-silver, self-cleaning contacts
Normalling: Half-normalled or de-normalled (user configurable)
Chassis Dimensions (H x W x D): 1.75” x 19” x 2.6” (44mm x 482mm x 68mm)
Module Dimensions (H x W x D): 1.4” x 0.6” x 2.6” (40mm x 18mm x 68mm)
Shipping Weight: 2.3 lb (1.1 kg)
This manual is part number 18-2128-B. © Copyright 1996 by dbx Professional Products.
❒ Make sure you always label the front panel jacks, so you remember
how the patchbay is connected to your system. Use a colored pencil
that won’t rub off easily, but that can be erased if you make changes.
Furthermore, it might prove helpful to use one color for normalled patch
points and another color for de-normalled patch points. (Note: Use of
solvents could damage the front panel finish.)
❒ The PB-48’s jacks have pure nickel-silver, self-cleaning contacts
which will provide many years of use. Use only standard audio 1/4”
plugs. Other styles of plugs while appearing to fit, can in fact deform the
contacts.
❒ Keep cables to a minimum length. Generally, most professional equip-
ment will drive at least 50 feet of commonly used shielded cable without
audible signal loss. Note that the longer the cable run, the more the
quality of the cable becomes critical.
❒ Maintain a supply of patchcords of various cable lengths, so you can
make connections rapidly and effectively.
❒ When mounting the unit in a rack; do not wedge it between two other
units that are much deeper, as measured from front to back; for easy
access to rear-panel jacks.
❒ Set the patchbay as close to eye level as possible to complement the
patchbay’s ability to simplify your system connections. (Consider if your
eye level is usually from a sitting or standing position).
❒ Although a normalled circuit board can support two “straight” signal
lines, we recommend you de-normal the circuit board, for situations pre-
viously described, to reduce feedback or the chance of oscillations
through unintentional signal loops.
❒ Do not waste real estate. Set up your patchbay to meet as many of
your needs as possible, while providing the most flexibility. Remember,
de-normalled operation reduces the chance of feedback.
❒ Do not overpatch. If there is a simple route, take it. Even if it means
having to de-normal a patch. This feature is provided to serve long term
needs. Use it.
❒ Do not be afraid to change your patchbay setup. New connections
might serve you better. Chances are if you’re thinking about a change,
then the change has merit. If you are concerned about forgetting a pre-
vious setup, just jot it down clearly.
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