My Yahmaha amplifier has flip/squeeze plugs, not the round ones I'm seeing here. Will these work?

I tried it on a flip style and they were too big. The measurement of the plug is 0.15" or 3.85mm at the tip, at the widest 0.20" or 5.3mm. Your flip connectors may be larger than my example, a quick msr of the max gauge wire you can use will answer.

Has anyone tried to solder wires into these connectors for a better connection?

We have personally not done so, but other customers have done so to make their own cables and plugs. So it is quite possible to solder them. Since we have not done so ourselves, I cannot speak on the quality connection, but we have not heard any complaints for those that have. Hope this helps!

Are the outer sleeves/barrel "holding in place" after they're securely tighten? I have similar plugs from other company that "unscrew" themselves

They have not given me any connection problems so far after several months of use, but I went to check them after I saw your question. All the outer sleeves of the plugs inserted into my receiver were loose, a few (not all) going into the wall plates were loose, and none going into any of the speakers were loose. No explanation for how or why this occurred.

Yes you are correct, this is a 4mm Banana plug.

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FosPower Banana Plugs 2 Pairs / 4 pcs, Closed Screw 24K Gold Plated Banana Speaker Plug Connectors for Speaker Wire, Wall Plate, Home Theater, Audio/Video Receiver, Amplifiers and Sound Systems

Product ID: 261568051

Details

Brand
FosPower
Cable type
Speaker
Compatible devices
Speaker
Connector type
Banana Plug
Special features
Gold plated

🔌Fits 12-18 AWG speaker wire

🔧Dual screw secure fit

🟡24K gold plated corrosion-proof

Description

🎧 Plug into perfection — sound that commands attention

PREMIUM GOLD PLATING - 24K gold connectors resist corrosion for flawless signal transfer
ROCK SOLID CONNECTION - Dual screws lock wires tight, eliminating shorts and dropouts
LIFETIME PEACE OF MIND - Backed by FosPower’s limited lifetime warranty for lasting reliability
UNIVERSAL COMPATIBILITY - Works seamlessly with 12-18 AWG wires and all major audio gear
EFFORTLESS SPEAKER SETUP - Quick, no-fuss installation with closed rear-entry design

FosPower Banana Plugs (4 pcs) feature a closed rear-entry design with dual screws for secure, short-proof speaker wire connections. Their 24K gold plating ensures corrosion resistance and superior conductivity. Compatible with 12-18 AWG wires, these plugs are ideal for home theaters, amplifiers, and surround sound systems, backed by a limited lifetime warranty.

Specifications

ASIN	B06Y6CQCX1
Brand Name	FosPower
Cable Type	Speaker
Color	Closed Screw
Compatible Devices	Speaker
Compatible Phone Models	Not Compatible with Phone Models
Connectivity Technology	Banana Plug
Connector Gender	Male-to-Female
Connector Type	Banana Plug
Customer Package Type	FFP
Customer Reviews	4.5 4.5 out of 5 stars (4,878)
Ethernet Cable Category	Cat 5
Indoor Outdoor Usage	Indoor
Item Shape	Round
Item Weight	1.2 Ounces
Manufacturer	FosPower
Maximum Voltage	300 Volts
Model	FOSCBL-2312
Model Name	Closed Banana Plugs for Speaker Wire, Gold Plated Connectors with Dual Screws
Number of Items	4
Number of Pins	2
Other Special Features of the Product	Gold plated
Outer Material	Metal, possibly zinc alloy
Part Number	FOSCBL-2312
Recommended Uses For Product	Home Theater, Audio Systems, Speaker Installations
Specification Met	RoHS
UPC	813154023128
Unit Count	4.0 Count

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