Does this come with all the necessary cords to connect this to a computer? Is it rca trs or xlr?

It depends on which speakers you order. The 3.5 and 4.5 come with everything necessary, but the 5 and higher definitely do not come with everything you need. Just the speaker and AC adapter.

Is the the Presonus E3.5 woofer speaker cone unprotected? It appears to have no fabric covering as many speakers would have.

Take a piece of t-shirt and bring it back and forth between your face and the monitors.. you will hear that even something like a tshirt of pantyhose, has a considerable effect on the sound projection. Also, having grills on the speaker looks cheap imo..

I am a Motivational Speaker, can I use these with a microphone when speaking to an audience of 75 people?

There are better choices for that -- you want speakers with a built-in mic preamp, and probably higher wattage amplifiers. You may also want folding speaker tripods. I suggest you puchase speakers designed for this, with a tripod screw hole on the bottom, and XLR mic inputs. For example, Bose EONS sound amazing for music as well. You may also wish to purchase a good wireless mic. Think of it as a system. The size of the room and the audience determine the required size and power of speakers.

Do the Eris 4.5 mute themselves when a headphone is connected?

Ideally they should, unless you’re using the Presonus Audiobox (or any other audio interface) and you connect headphones to that. In which case, they won’t mute.

ASIN	B0C88YW1ZR
Audio Driver Type	Dynamic Driver
Best Sellers Rank	#178 in Musical Instruments ( See Top 100 in Musical Instruments ) #1 in Studio Subwoofers
Bluetooth Range	100 Meters
Color	black
Compatible Devices	Smartphone, Tablet, Laptop
Control Method	Touch
Customer Package Type	FFP
Customer Reviews	4.5 4.5 out of 5 stars (23,403)
Date First Available	August 15, 2023
Included Components	1 pair of Eris 4.5BT monitors
Is Waterproof	FALSE
Item Weight	9.9 pounds
Item model number	Eris 4.5BT
Manufacturer	PreSonus
Material	Metal, Plastic
Model Name	Eris 4.5BT
Mounting Type	Shelf Mount
Number of Items	2
Number of Power Levels	1
Power Source	Corded Electric
Product Dimensions	6.4"D x 7"W x 9.5"H
Recommended Uses For Product	Multimedia, Gaming, Studio-Quality Music Production
Set Name	2
Shape	rectangular prism
Signal-to-Noise Ratio	74 dB
Speaker Size	4.5 Inches
Speaker Type	Monitor
Special Feature	Featuring an integrated headphone output, flexible connection options, Bluetooth 5.0, and easily adjustable high- and low-frequency controls to fine-tune speaker response, Eris 4.5BT powered desktop speakers ensure optimal performance in any environment – from the home studio, to the dorm room, and more. Eris 4.5BTs deliver clear, accurate, studio-quality sound, with a powerful low-end punch and e…
Specific Uses For Product	Multimedia, Gaming, Studio-Quality Music Production
Style	Gen 2 BT
Subwoofer Connectivity Technology	Wireless
Subwoofer Diameter	8 Inches
Surround Sound Channel Configuration	2.0
Tweeter Diameter	1 Inches
UPC	673454011894
Unit Count	2.0 Count
Warranty Type	Limited
Wireless Communication Technology	Bluetooth
Woofer Diameter	4.5 Inches

PreSonus Eris 4.5BT Bluetooth Studio Monitors, Pair — 4.5" Powered, Active Monitor Speakers for Near Field Music Production, Audio Mixing & Recording

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