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Section 2: Introduction
Congratulations on your purchase of JBL Professional 104 Reference Monitors. These monitors meet JBL’s
high standards for accuracy and long-term reliability in demanding applications. All 104 Reference Monitors
incorporate JBL Professional transducer technologies to provide accurate frequency response, low frequency
extension and impressive output for their compact size. Each speaker is equipped to interface with a range of
signal sources, including high-output professional audio equipment.
JBL COAXIAL TRANSDUCER
The heart of the system is an innovative 4.5" JBL coaxial transducer that provides several benets:
• The coaxial high and low frequency transducer design delivers smooth, extended frequency response
from 60 Hz to 20 kHz, in a compact, integrated form factor.
• The low frequency cone is precisely contoured to serve as the "wave guide," delivering detailed imaging
and a broad sweet spot so you don't have to sit directly in front of the speakers to hear accurate and
natural sound.
FEATURES
The JBL 104 Reference Monitors include a range of features for professional audio production where accuracy
and a compact form factor are essential:
• JBL coaxial 4.5" low-frequency and integrated high-frequency transducers deliver extended frequency
response and detailed imaging
• Integrated 60-watt power amplier, with 30 watts driving each speaker for impressive output
• 60 Hz – 20 kHz frequency range, acoustically optimized to provide neutral performance when placed on a
desktop or work surface
• Balanced 6.5 mm (1/4”) and unbalanced 3.5 mm (1/8") inputs allow connection of a broad range of
professional and consumer audio equipment
• Front-panel AUX IN jack allows convenient connection of personal music players, mobile phones and
other audio playback sources
• Front-panel VOLUME control
• Front-panel HEADPHONE jack with automatic speaker mute feature
• The MASTER MONITOR includes an integrated power supply, power inlet and all the electronics for the
EXTENSION MONITOR, eliminating clutter
JBL PROFESSIONAL RELIABILITY
Prior to becoming a production-ready design, the 104 Reference Monitors are subjected to JBL’s tough 100-
hour power test, in which the speakers are required to play continuously at full output for 100 hours without
failure. This demanding test ensures the 104 Reference Monitors deliver years of reliable performance. To get
the most out of your speakers, please review this user's guide and keep it on hand for future reference. Also,
please register your new speakers at www.jblpro.com/registration.
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