Question 1

When using the built in battery, is there any noise? Some people are saying that this unit isn't isolated

Accepted Answer

No noise.  Just like a big 9 volt battery.  The noise comes from the transformer,  the power supply.  Even plugged in, it is pretty quiet.  Love it!

Question 2

are all the  outputs are isolated? No they are not

Accepted Answer

I have read definitions in terms of multi-output devices, that the grounds must be isolated, and this is not the case here. 0 ohms from center pin to center pin on adjacent connectors is enough to disqualify. However, as long as there are no ground loops in your rig, and clean connectors and cables, this shouldn't be a problem, and has never been a problem to me. This supply has inside a lot of engineering design. I opened it up and spotted a STM8S003 micro-controller and an FP5139 Boost convert chip. I wish I could get a look at the schematics to see what's really going on in there.

But I've been using mine for about a year now, and it has been great. It powers my Electro-Harmonix 5MM power amp with 3 or 4 pedals running for hours on a charge. Never any hum or apparent interaction between pedals.

Question 3

When the internal battery is dead, can it be plugged in the wall to use still?

Accepted Answer

It is a rechargeable battery. The performance of a dead battery being used while being charged (It is charging if it is plugged in) will be greatly diminished. If you can plug it in there is no need for a battery powered unit. Try this instead. https://www.amazon.com/dp/B07D8NZKS6/ref=sspa_dk_hqp_detail_aax_0?psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEzVFNLSFdSR0JEV0FRJmVuY3J5cHRlZElkPUEwOTcyMDM4SzlIQUpZSlFaUFYxJmVuY3J5cHRlZEFkSWQ9QTA0MTYyODIzRjNXOU44WERQWkRFJndpZGdldE5hbWU9c3BfaHFwX3NoYXJlZCZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=

Question 4

How long are the are the 8 power cables ?

Accepted Answer

These cables are about 22 inches. (55cm) I hope this helps.

ASIN	B0871RLGH3
Amperage	100 Milliamps
Best Sellers Rank	886 in Musical Instruments & DJ ( See Top 100 in Musical Instruments & DJ ) 7 in Guitar Pedal Power Supplies
Box Contents	DC 9V/2A Power Adapter, DC Power Cable, Power Supply, Reversed Polarity Cable
Brand Name	JOYO
Colour	Black
Connector Types	DC, USB type A
Country of Origin	China
Customer Reviews	4.7 4.7 out of 5 stars (573)
Enclosure Material	Metal, Other, Plastic
Form Factor	Compact, rectangular shape with dimensions of approximately 146mm65mm35mm.
Input Voltage	9 Volts (DC)
Item Dimensions	14.6 x 6.5 x 3.5 centimetres
Item Type Name	Pedal Power Supply
Item Weight	620 Grams
Manufacturer	JOYO Technology
Manufacturer Part Number	061-0JP05-0012
Maximum Power	1800 Milliwatts
Model Number	JP-05
Output Current	1 Amps
Output Voltage	9 Volts (DC)
Output Wattage	18 Watts
Product Warranty	We provide one year after-sales service, if Claimed the item was not as described when that wasn't true, Returned a completely different item or an empty box, Returned the item with missing parts, We will report to Amazon after checking the returns.
Specification Met	FCC, UL, RoHS
Unit Count	1.0 count

JOYO Built-in 4400mAh Rechargeable Battery Guitar Effect Pedal Power Supply 8 Outputs 9V 12V 18V (100mA, 500mA) Jacks & 5V/1A USB Port (JP-05)

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