Monitor 4 vs Monitor 5jr+
The Monitor 5jr+'s impedance is 6Ω against the Monitor 4's 8Ω and its high-frequency extension 26 kHz against 25 kHz. Both share sensitivity (91 dB) and ways (2).
AI-generated product photo — not official manufacturer imagery.
LoudspeakersBookshelf SpeakersDiscontinued
Estimated price (community-sourced)
$65
Around — community and catalog average, updates slowly
About the Monitor 4
The Polk Audio Monitor 4 is a vintage 2-way bookshelf loudspeaker produced from 1982 to 1985. It uses a 1-inch SL1500 dome tweeter and a 6.5-inch midrange driver in an 8-ohm enclosure. Published specifications include a 35Hz–25kHz frequency-response range, 91dB efficiency, and recommended amplifier power of 20–100 watts per channel. The cabinet measures approximately 14.5 inches high by 8.5 inches wide by 7.5 inches deep, with a listed weight of about 24 pounds per pair.
Specifications
Transducer Specifications
Driver and acoustic performance characteristics
- Sensitivity
- 91 dB SPL @ 1W/1m
- Impedance
- 8Ω
- Frequency Response
- 35 Hz - 25 kHz
- Power Handling
- 100W
- Min. Amplifier Power
- 20W
- Max. Amplifier Power
- 100W
Speaker Design
Driver configuration and enclosure design
- Configuration
- 2-way
- Driver Type
- dynamic
- Driver Size
- 6.5"
- Driver Count
- 2
- Enclosure Type
- sealed
- Crossover Frequency
- 3.0 kHz
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 216 × 368 × 191 mm (W × H × D)
- Weight
- 10.89 kg (24 lbs)
Key Specifications
Sensitivity: 91 dB
Impedance: 8Ω
Frequency: 35-25000 Hz
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions