It may not be possible to use it to switch some digital amplifiers. For details, please read the instruction manual of the digital amplifier.

AS-4 (III) from up to 4 sources to 1 amplifier. Or conversely, it is used when switching from one source to up to four amplifiers. For AS-5 (III), select up to 4 speakers from one amplifier. Or you can switch between 4 amplifiers and listen to a set of speakers.
Discrete wiring with emphasis on sound quality Adoption of gold-plated terminals Parallel simultaneous output possible

Shipping by Airmail small deliveries; economy shippment takes about 8-22 business days
+ handling time about 3-4 business days.

You can choose Expedited Shipping; it takes about 2-4 business days with addtitional $10~

We accept PayPal only.
Usually, we will ship within 5 business days after receiving the clear payment.
Return policy is for unopened product packages only.
This product is shipped from Japan. Import duties, taxes, and costs are not included in the item price or shipping costs. These charges are the buyer's responsibility.

* Import duties, taxes and fees are not included in the item price or shipping charges. These charges are the buyer's responsibility.
* Please check with your country's customs office to determine what these additional costs will be before bidding / purchasing.
* These charges are usually collected by the shipping freight (shipping) company or when you pick up the item-don't confuse them for additional shipping.
* We do not mark the product value below the value or mark the product as a "gift".

* Customs procedures are time consuming and may delay delivery.