for Boss PSA Adapter 9V DC Guitar Pedal Power Supply 1A Power Cord for BOSS Effects Pedal,One Spot,Casio Keyboard,Roland Musical Instruments,Distortion,PSA-120S,Center Negative with Daisy Chain Cables

No more batteries needed, constant power supply to my pedals.

Al momento todo bien..fue para un regalo y no me han dicho lo contrario

Not all of these "brick" or "wall wort" power supplies are built the same. Although the standard center negative adapters are common-place, not all of them have sufficient filtering. The adapter's purpose is to transform the wall voltage (120VAC in the USA) down to 9V DC. It does this by rectifying and then filtering the resulting voltage. In non-musical applications, a certain amount of AC "ripple" voltage can be acceptable, but NOT in the case of audio products, like the effects pedals used for electronic music reproduction. In these applications, almost no amount of ripple is acceptable. At any rate, this converter produces negligible ripple. I am using it, through a "daisy chain" to power two pedals and the result is excellent - no external noise is introduced. In most pedals, to keep the cost down, the use of high quality filter capacitors is minimal to non-existent. Pedal manufacturers rely on end users either using a 9v battery to power the effect (pure DC = absolutely NO ripple) or a power supply that has excellent filtering. That is why choosing the correct power supply for your pedals is so important. This one definitely does the job!

Works well, no issues.

Very good product at a reasonable price.