Your cart
Contact us
Close contact box
Connect ID #
623 120 322 4
Connect ID #
623 120 322 4
All finished with your chat session?

We’ll email you a transcript of this conversation for your records.

Our contact center is currently closed.

Please enter your name.  
Please enter a valid email address. Why is this required?

For Tech Support, call 1-888-292-2575

All web chat conversations are recorded. We use automated technology to connect you with an Advisor and to answer some common questions. If you do not consent, please do not continue with chat assistance.

Thank you, !
Our conversation will be emailed to
Chat Advisor Image

Your Advisor,

More about me
Please enter a question  
Don't wait on hold. We'll call you back when it's your turn to talk with the next available .
Please enter your name  
Please enter your phone number  
Please enter a message  

Calls may be recorded for training and quality control purposes.

We are located in Virginia USA.


TOSLINK adapter for PAC's AmpPRO interface: send an optical digital signal to your amp or processor

Item # 541APATOS1

Item # 541APATOS1

In stock

60-day returns

If you don't love it, send it back.

60-day price protection

We’ll reimburse you if the price drops.

Free lifetime tech support

Whenever you need a hand.

About the PAC APA-TOS1

For best sound quality, keep it digital

Wish you had a way to connect your PAC AmpPRO interface to your high-end sound processor or amplifier with an optical digital input?  Install this APA-TOS1 TOSLINK adapter inside your AmpPRO's chassis, and you'll get a TOSLINK connection for an optical fiber run to your amp or processor with a compatible S/PDIF optical input. Warranty: 1 year.

What's in the box:

  • Toslink fiber optical output add-on module (for PAC AmpPro)

Customer reviews

Loading reviews...

PAC APA-TOS1 reviews

Average review:

3 reviews

Thanks for submitting your review

Filter by rating

Customer photos

Sort reviews

Sort by:
Items per page:
View page:

Verified customer (What's this?)
Verified employee review (What's this?)



Crutchfield response

<< >>

More details on the PAC APA-TOS1

Stacey B.

Product Research


Toslink Fiber Optical Output Add-on Module: The APA-TOS1 is a fiber-optic audio output add-on module for use with PAC AmpPRO advanced amplifier interfaces (sold separately). The APA-TOS1 quickly and easily installs inside a AmpPRO interface and provides a digital toslink output. Connect any brand and length of toslink fiber-optic cable (not included), so you can connect a toslink equipped DSP or amplifier into your vehicle.

  • Quick and easy installation into any AmpPRO interface.
  • Provides a digital fiber-optic variable audio signal output (up to 2ch).
  • Compatible with toslink equipped DSPs or Amplifiers.
  • Digital audio signals are less susceptible to noise or interference.
Note: The APA-TOS1 must be used in conjunction with a PAC AmpPRO advanced amplifier interface (sold separately). No toslink fiber-optic cable is included and must be purchased separately.

Loading accessories...

Customer Q&A

3 questions already asked

Any idea what the bit depth and sample rate is for the Toslink output?
[ don  Sep 06, 2019 ]
1 answer
This will send the audio quality that is is given. When using a factory CD/radio. The highest you will get is CD quality, so 16 bit/44.1 kHz.
[ Calvin  Sep 17, 2019 ]  Staff
How come the stereo shops don't sell you this from the get-go? they keep telling me I have a weak signal and I need to put a new deck in. I have already bought a bigger amp and it still hasn't fixed the problem. Now they're telling me I need to put in new door speakers in with a 4 channel amp. Sounds like they're really sticking it to me.
[ David  May 26, 2018 ]
1 answer
Sorry to hear that! For more personalized advice for your vehicle's system, please contact an Advisor directly by phone (888.955.6000) or online chat. They can go over what you have now and help explain the best option(s) for installation so you can make a more informed buying decision :)
[ Larry  Jun 06, 2018 ]  Staff
Will I still need to have a line out converter. Wanting to add 4 channel amp. And also mono amp replacing all factory speaker and sub?
[ Chris  Dec 20, 2017 ]
1 answer
When using a compatible PAC AmpPRO Amplifier Replacement Interface, no, you do not need to use a separate line output converter: For additional assistance and personalized recommendations, feel free to contact us directly by phone or through our online chat service:
[ Ryan  Dec 27, 2017 ]  Staff

Loading articles...

Compare the sound