Is the cooling fan supposed to be running all the time?

It runs all the time. And it’s loud.

Does this system produce stereo (left and right) channels for each zone on the 70v? In the pictures, it looks like it is bridged mono sound per zone.

No. Like most 70v amps, it can only output mono.

Anyone able to manage multiple zones with in wall knob amps?

Sure, why don't you crank each zone up and install in-wall volume controls to match the speaker settings re: 70 volt, 8 ohm, etc..

I bought these speakers https://www.amazon.com/dp/b014v4cva2/ref=cm_sw_r_cp_tai_csn2db2176sm3 how many can i connect per channel?

You need 70 volt speakers. These look like 8 ohm speakers

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Rockville RCS180-6 180W 6-Zone 70v Commercial Amplifier, Bluetooth, USB/SD/RCA, Mic, Optical Inputs, FM, for Restaurants/Offices

Product ID: 129139584

Details

Item dimensions L x W x H
19 x 16 x 4
Manufacturer
Rockville
Maximum Supply Voltage
120 Volts (AC)
Minimum Supply Voltage
120 Volts (AC)
Voltage
70 Volts

🎤3 mic inputs with echo & chime

📡Bluetooth + USB/SD/Optical inputs

🔊180W power across 6 zones

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Description

🎶 Elevate every space with pro-level sound control — don’t just play music, own the vibe!

MULTI ZONE MASTERY - Control 6 independent zones with dedicated volume knobs for tailored soundscapes in every corner.
SEAMLESS CONNECTIVITY - Stream effortlessly via Bluetooth or plug into USB, SD, RCA, and optical inputs—versatility that keeps you connected.
PRO GRADE MIC FEATURES - Echo control with speed & repeat plus a chime button makes announcements and events crystal clear and engaging.
BUILT IN FM DIGITAL READY - Tune into FM radio or connect digital devices like TVs with the integrated optical input for flawless audio integration.
DURABLE INSTALLATION FRIENDLY - Commercial-grade build with detachable Euro-block terminals and cooling system ensures reliability and easy rack mounting.

The Rockville RCS180-6 is a robust 180W commercial amplifier designed for multi-zone audio distribution in restaurants, offices, and retail spaces. Featuring Bluetooth, USB/SD, RCA, optical inputs, and 3 mic channels with advanced echo and chime controls, it delivers versatile, professional-grade sound management. Its durable, rack-mountable design with independent zone volume controls and built-in FM tuner makes it the ultimate all-in-one solution for dynamic commercial audio environments.

Specifications

ASIN	B07PW81N7N
Best Sellers Rank	#14,315 in Electronics ( See Top 100 in Electronics ) #72 in Audio Component Amplifiers
Brand	Rockville
Built-In Media	Quick Start Guide
Customer Reviews	4.4 4.4 out of 5 stars (241)
Item Type Name	180 Watt 6 Zone 70v Commercial/Restaurant Amplifier/Bluetooth
Manufacturer	Rockville
Mfr Part Number	RCS180-6
Model Number	RCS180-6
Unit Count	1.0 Count
Warranty Description	1 Year

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