So I’m guessing this does not work for car radios

This microphone is omni-directional, meaning it picks up sound from all directions equally. Although it will work as a microphone for many applications that use an 1/8" mono connector, it is not ideal for voice applications. It is also incorrect for Alpine car systems that came with an Audyssey microphone. Those used an earlier version that is the same shape, but has different characteristics. This mic may still work reasonably well for those systems, but it is recommended to source an original ACM1 (no longer produced or available for sale from Audyssey).

Will this work on the onkyo tx-sr604?

I believe the 604 is early 2000s (2006/2007) and used the original flat hockey puck style mic, so this tower style mic is most likely not compatible and won't work as it uses a different calibration file than does the hockey puck mic. However, you can buy the correct mic MIC-5000 (#1B068MIC) from Onkyo directly. Just go to their site and enter the model number TX-SR604.

The Onkyo TX-NR676 is not compatible with this microphone as it does not have Audyssey MultEQ room correction. This microphone may function in certain respects, but is not correct.

Will this audyssey mic work on my Onkyo Tx-Rz820

If the electronics are the same as Denon or Marantz then yes.

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Audyssey Official ACM1HB Replacement Calibration Microphone for AVRs, Audyssey Measurement Microphone for Denon, Marantz, Onkyo, Integra, Teac & Tascam AV Receiver, Supports MultEQ, XT & XT32

Product ID: 315521002

🎯Omnidirectional precision

🔌3.5mm jack connectivity

🎚️Supports MultEQ XT32 calibration

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Description

🎧 Elevate your home theater sound with the mic that knows every corner.

PLUG PLAY CONVENIENCE - Simple 3.5mm jack connection means zero hassle, just pure sound optimization.
TRUSTED AUDYSSEY QUALITY - Backed by industry-leading acoustic research powering top home theaters worldwide.
NEXT LEVEL MULT EQ SUPPORT - Works flawlessly with MultEQ, MultEQ XT & XT32 for pro-grade audio tuning.
SEAMLESS AVR COMPATIBILITY - Tailored for Denon, Marantz, Onkyo, Integra, Teac & Tascam AVRs—no guesswork.
PRECISION SOUND CALIBRATION - Omnidirectional mic captures every nuance for flawless room acoustics.

The Audyssey Official ACM1HB Replacement Calibration Microphone is a genuine, omnidirectional mic designed exclusively for select Denon, Marantz, Onkyo, Integra, Teac, and Tascam AV receivers. Supporting advanced MultEQ variants including XT and XT32, it ensures precise room acoustic measurements and optimal speaker calibration. Featuring a convenient 3.5mm jack and trusted Audyssey engineering, this mic restores professional-grade sound tuning for immersive home theater experiences.

Specifications

ASIN	B08ZT3MR7G
Antenna Location	Speech
Audible Noise	78 Decibels
Best Sellers Rank	#35 in Two-Way Radio Headsets & Microphones
Brand	Audyssey Laboratories, Inc.
Built-In Media	microphone
Color	Black
Compatible Devices	Denon AVRs, Marantz AVRs, Onkyo AVRs, Integra AVRs, Teac AVRs, Tascam AVRs
Connectivity Technology	1/8" (3.5mm)
Connector Type	3.5 mm Jack
Customer Reviews	4.4 4.4 out of 5 stars (683)
Enclosure Material	Plastic
Frequency Response	20 KHz
Impedance	250 Ohms
Item Weight	0.09 Kilograms
Manufacturer	Audyssey Laboratories, Inc.
Mfr Part Number	ACM1h
Microphone Form Factor	Table Array
Model Name	Replacement Microphone
Model Number	YA-5B46-PTFU
Number of Channels	1
Polar Pattern	Omnidirectional
Power Source	Not powered
Signal-to-Noise Ratio	78 dB
Special Feature	Stand
UPC	195893319688
Unit Count	1.0 Count
Warranty Description	1 Year

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