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Rolls RS81B Quartz PLL Synthesized AM/FM Tuner

BH #RORS81B • MFR #RS81B
2 reviews
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Rolls RS81B Quartz PLL Synthesized AM/FM Tuner
Key Features
  • Quartz Phase Locked Loop (PLL)
  • 30 Memory Presets for FM and AM Stations
  • Retains Presets When Powered Off
  • Auto Search Function
The RS81B from Rolls is a single-rack space quartz Phase Locked Loop (PLL) digital AM/FM tuner, well suited for remote radio station trucks and repeaters, houses of worship and school installations, night clubs, restaurants, and other professional applications. The unit can store up to 30 FM and AM stations and retains its memory even after powering off. The system offers Radio Data System (RDS) display via its large and easy-to-read digital LCD. The RS81B also features an auto search function, a signal strength LED meter indicator, and a wireless remote control.
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Rolls RS81B Overview

The RS81B from Rolls is a single-rack space quartz Phase Locked Loop (PLL) digital AM/FM tuner, well suited for remote radio station trucks and repeaters, houses of worship and school installations, night clubs, restaurants, and other professional applications. The unit can store up to 30 FM and AM stations and retains its memory even after powering off. The system offers Radio Data System (RDS) display via its large and easy-to-read digital LCD. The RS81B also features an auto search function, a signal strength LED meter indicator, and a wireless remote control.

  • Up to 30 FM and AM stations may be stored
  • RDS (Radio Data System) Display
  • Retains presets when power is off
  • Large LCD digital display
  • Auto Search function
  • Standard 1 space EIA rack chassis
  • 1/8" Headphone output, Stereo XLR and RCA outputs
  • Signal strength LED meter indicator
  • Remote included
     
UPC: 675889008111

Rolls RS81B Specs

Connectors
Inputs
FM Antenna 75 Ohm: Connects to the included 75 Ohm FM antenna
AM Loop Antenna 300 Ohm: Connects to the included 300 Ohm AM Loop antenna
Outputs
Balanced: 2 x XLR line level
Unbalanced: 2 x RCA line level
Headphone (Front Panel): 1/8" / 3.5 mm
FM Section
Tuning Range
87.5 to 108 MHz
Limiting
3 dB Limiting: 12 dB
Image Rejection
53 dB
Usable Sensitivity
Mono IHF: 9 dB
Selectivity
-70 kHz to +90 kHz
Signal-to-Noise Ratio (SNR)
52 dB @ 1 mV Mono
Stereo
50 dB
THD
At 1 mV 40 kHz Deviation: 0.18%
Stereo Separation
28 dB
Auto Scan Sensitivity
23 dB
AM Suppression Mod.
52 dB
Antenna Input Impedance
75 Ohms
AM Section
Tuning Range
530 to 1710 kHz (10 kHz increments)
522 to 1611 kHz (9 kHz increments)
IF Frequency
450 kHz
Usable Sensitivity
28 dB
Auto Scan Sensitivity
41 dB
S/N Ratio
46 dB @ 5 mV/M
6 dB Bandwidth
7 kHz
Image Rejection
42 dB
ACA
±9 kHz: 46 dB
AGC Action
43 dB
THD
0.40% @ 5 mV/M
Antenna Input Impedance
300 Ohms
General Specifications
Power Requirements
Power Select Switch: 115 V (110-120 VAC) or 230 V (220-240 VAC), 60/50 Hz, 45 W
IEC
AC: Three connector IEC power cord
DC Power Input
24 VDC input for powering the RS81B when main power is not available
Dimensions (WxHxD)
19.0 x 1.8 x 7.0" / 482.6 x 44.5 x 177.8 mm
Weight
7.1 lb / 3.2 kg
Packaging Info
Package Weight
7.35 lb
Box Dimensions (LxWxH)
23.8 x 11.5 x 5.3"

Rolls RS81B Reviews

Better than my RS78B

By Jay
Rated 5 out of 5
Date: 2024-02-20

After 23 years my Rolls RS78B bit the dust so I replaced it with this unit. Much better reception (now with a uni outdoor antenna), the RDS display is nice and there are more presets. Like very much.

Not Recomended

By Anonymous
Rated 2 out of 5
Date: 2017-02-17

Purchased 3 of these units. All 3 failed in less than 12 months. When the first unit failed is when I discovered the warranty is only 90 days for what Rolls' calls Signal Source devices. Despite each unit failing in less than 12 months and this comment I found on the Rolls' web site Regardless of age we don't usually charge for repairs, a lot of people really like this. they still charged $50 - $60 dollars to fix each unit. They seemed like a nice unit but 3 strikes is enough. Gonna try a different brand next time.

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