CONSUMER SAFETY ALERT

When the amplifiers are used with aftermarket metal base tubes, the bare metal can become electrified, posing a risk of serious injury or death from electrocution.
Official Consumer Product Safety Recall • August 27, 2026

AudioLineOut Recalls Studio Six Headphone Amplifiers Due to Risk of Serious Injury or Death from Electrocution Hazard

This recall involves Studio Six Headphone Amplifiers with model ST6. The amplifiers are black or silver. The amplifiers measure 15-3/4 inches high by 12 inches wide. The height for the lower level of the unit, top to bottom, is 5-3/4 inches; the height from the top of the upper level to bottom of the unit is 20-3/4 inches. In the front of the unit, there are four audio connectors for headphones. In the back, there are three sets (L and R) of RCA inputs. Also in the back is a connector for an auxiliary power device.

Required Consumer Action

Consumers should stop using the recalled amplifiers immediately and contact AudioLineOut for a free repair. Consumers should contact AudioLineOut at support@aloaudio.com for a prepaid shipping label to ship back the product for repair. Alternatively, consumers can utilize the originally supplied vacuum tubes.

Contact Information

AudioLineOut at 971-279-4357 from 8 a.m. to 5 p.m. PT Monday through Friday, email at support@aloaudio.com, or online at https://aloaudio.com/ and click on “Safety Notice” or go directly to https://aloaudio.com/pages/studio-six-headphone-amplifier-safety-recall for more information and to fill out a contact form.

Recall Details

Injuries
None reported
Remedy
Repair
Recall Number
26720

Product Information

Product Name
Studio Six Headphone Amplifiers
Product Type
Hi-fi and Stereo Equip., Amplifiers, Speakers
Number of Units
About 90
Distributed By
AudioLineOut LLC, of Portland, Oregon
Manufactured In
United States

Register This Product

Contact Manufacturer

Use the contact information below to reach out about this recall:

Phone 971-279-4357
Website aloaudio.com/
Full Contact Information

AudioLineOut at 971-279-4357 from 8 a.m. to 5 p.m. PT Monday through Friday, email at support@aloaudio.com, or online at https://aloaudio.com/ and click on “Safety Notice” or go directly to https://aloaudio.com/pages/studio-six-headphone-amplifier-safety-recall for more information and to fill out a contact form.