9V AC-AC power adapter with 1110mA output and 2.1mm x 5.5mm right-angle plug, by PHC Enterprise Inc.

PHC Enterprise 9V AC-AC power adapter with 2.1mm x 5.5mm right-angle plug, AC-091A

9V AC-AC Power Adapter 1110mA (1.11A) | 2.1mm x 5.5mm Right-Angle Plug | AC-091A

Name: 9V AC-AC Power Adapter 1110mA (1.11A) | 2.1mm x 5.5mm Right-Angle Plug | AC-091A
Rating: 5.00 (3 reviews)

by PHC Enterprise, Inc.

$13.00 - $13.00

$13.00

$13.00 - $13.00

$13.00

9V AC-AC Linear Wall Transformer — 1110mA (1.11A)

Part AC-091A

The AC-091A is a wall-mount linear AC-to-AC power adapter delivering 9V AC output at 1110mA (1.11A). Its 2.1mm x 5.5mm right-angle barrel plug helps with equipment mounted in racks or positioned close to walls. Use this adapter only when your device specifically requires 9VAC alternating current (~) and the connector dimensions match.

⚠️ Important: This is a non-regulated AC-AC adapter that outputs 9VAC, not DC. Before ordering, confirm your device label shows 9VAC or the ~ symbol and that it uses a 2.1mm x 5.5mm right-angle connector. The output may measure higher than 9V with no load, which is normal for this type of transformer.

Technical Specifications

Model: AC-091A
Input: 120V AC, 60Hz
Output: 9V AC at 1110mA (1.11A)
Connector: 2.1mm (ID) x 5.5mm (OD) right-angle female barrel plug
Type: Wall-mount linear transformer (non-regulated)
Safety: UL/cUL Listed

Common Use Cases & Compatible Devices

Specialty Audio Equipment: Equipment that specifically requires 9VAC and a 2.1mm x 5.5mm connector
Rack and Wall-Adjacent Equipment: Devices where a right-angle plug helps provide clearance around the power port
Specialty Control and Security Equipment: Equipment requiring 9VAC input and no more than 1110mA

Common Replacement Compatibility

Use as a replacement only when the original adapter or device label specifies 9VAC, a compatible 2.1mm x 5.5mm connector, and current requirements of no more than 1110mA (1.11A). Confirm the connector fit, right-angle clearance, and AC output requirement before connecting.

Frequently Asked Questions

Q: How do I know if my device needs AC or DC?
A: AC is shown by the ~ symbol or the letters VAC. DC is shown by VDC or the DC symbol. This adapter is not for DC-only devices.

Q: Will the right-angle plug fit my device?
A: Confirm the connector measurements, 2.1mm inside diameter and 5.5mm outside diameter, along with the available clearance around the power port.

Q: Why can a voltmeter show more than 9V?
A: This is a non-regulated linear transformer. Its no-load voltage can measure higher than the rated output until a device is connected.

Q: What should I verify before ordering?
A: Confirm that your device requires 9VAC, accepts up to 1.11A, and uses a 2.1mm x 5.5mm right-angle barrel connection.

5 stars: 3 (100%)
4 stars: 0 (0%)
3 stars: 0 (0%)
2 stars: 0 (0%)
1 star: 0 (0%)

Works for non-standard audio effects

Most guitar pedals and effects boxes are standard 9V center negative DC, but my Alesis Phlngr actually needs 9V AC. I had to find the right plug size which ended up being 2.5 mm inner diameter instead of 2.1mm like this adapter. This site also sells the converter from 2.1x5.5 mm to 2.5x5.5 mm that allows me to interface with this unit. Works as intended.

Dear Nikolai,

Your positive review and the wonderful pictures you shared mean the world to us! We appreciate your support and look forward to serving you again.

Exactly what I needed

Arrived in good condition and is exactly what I needed.

Great service

Actually spoke with a knowledgeable person that returned my call!

Thank you for your business and postive feedback. We are delighted that you called us prior to purchasing to make sure the right power supply and plug size fits your need.

5 stars: 3 (100%)
4 stars: 0 (0%)
3 stars: 0 (0%)
2 stars: 0 (0%)
1 star: 0 (0%)

Works for non-standard audio effects

Dear Nikolai,

Your positive review and the wonderful pictures you shared mean the world to us! We appreciate your support and look forward to serving you again.

Exactly what I needed

Arrived in good condition and is exactly what I needed.

Great service

Actually spoke with a knowledgeable person that returned my call!

Thank you for your business and postive feedback. We are delighted that you called us prior to purchasing to make sure the right power supply and plug size fits your need.

5 stars: 3 (100%)
4 stars: 0 (0%)
3 stars: 0 (0%)
2 stars: 0 (0%)
1 star: 0 (0%)

Works for non-standard audio effects

Dear Nikolai,

Your positive review and the wonderful pictures you shared mean the world to us! We appreciate your support and look forward to serving you again.

Exactly what I needed

Arrived in good condition and is exactly what I needed.

Great service

Actually spoke with a knowledgeable person that returned my call!

Thank you for your business and postive feedback. We are delighted that you called us prior to purchasing to make sure the right power supply and plug size fits your need.