Frequently Asked Questions

Please contact your regional distributor for guidance on how to proceed with repairs, if necessary. Depending on the nature of the repair, we may find it more efficient to work with a local (trusted) tube amplifier repair shop, rather than incur the expense and time required for shipping.
Yes! The Line Out is always transmitting an audio signal, regardless of whether the speaker is on or off.
Generally speaking, if you are sending the signal to recording equipment that has a TRS or XLR +4dBU line input (such as an audio interface or mixer), you should have the Balance Switch in the up (balanced) position. If you are sending the signal to an effect pedal or other guitar amplifier, put the Balance Switch in the down (unbalanced) position.
Yes, but voltage connectors inside the amp may have to be reconfigured if the country uses different voltage mains than your current country, or damage could occur. Please contact your regional distributor for further guidance.
While certain dynamic, high output microphones will work with the Audity One – the Shure Green Bullet as an example – it is not specifically a microphone preamp and isn’t likely to provide enough gain to amplify the signal from most studio-grade professional mics.
The heat is a normal byproduct of the operation of the vacuum tubes and power supply (that black thing on the top of the amp). However, in the extremely unlikely event that you notice any smoke or burning smell, it is advised to immediately turn off the amp and contact your regional distributor for assistance. We give every amplifier a 24 hour performance test before shipping them out, and unequivocally stand behind the quality of our products. If you are using the amplifier as intended, an Audity One amp should give you many years of reliable enjoyment. In any case, we do recommend that you use the amplifier in a reasonably well-ventilated area, and avoid touching the tubes and power transformer when the amp is operating, as they will be hot to the touch.

Version 1: US-only power supply, no master volume channel.

Version 2: International power supply, no master volume channel.

Version 3: Custom-wound international power supply (allows for use of more preamp tube types), master volume channel.

Version 4: Custom-wound international power supply, master volume channel, improved tremolo circuitry.

All new build Audity One Recording Amplifiers are wired with the most recent version circuitry.

Just on its own, the V knob is clean up to about 12 o’clock and increasingly dirty past that point. The point of the OD channel, an extra gain channel, is to give the amp two extra capabilities – loud and clean, or quiet and dirty. To achieve loud/clean, turn the V knob to 9 o’clock but start with the OD knob at 12 o’clock and move up as needed. For quiet/dirty start with V at 12 o’clock and OD around 9 – the more you turn up the V knob the more tube distortion you’ll get. But it’s an extra gain channel, so if you end up with both knobs past 12 o’clock, you might notice it starting to feedback or squeal.

This is expected behavior and the simple solution is to set either the V knob or OD knob at a slightly lower level than where the feedback starts. However, if your Audity is feeding back or squealing at lower levels, that could be indicative of a problem – see the next question.

This is behavior typical of either an audio circuit that has been overdriven beyond its limits, or a preamp tube that is microphonic.

First, ensure that both preamp tubes (in the two leftmost sockets) have tube shields on them, as this should significantly decrease the chance of any feedback or squealing.

If tube shields are already in use, remove them temporarily to check the preamp tubes for microphonics. This check can be conducted by first turning OD mode off and setting the V knob at 12 o’clock, and tapping the tube in the leftmost socket with a chopstick or pen as you slowly increase the level on the V knob. If you can hear the tapping clearly through the speaker, or the tapping seems to produce hints of the feedback or squealing, the tube is microphonic, and it needs to be replaced. If that tube checks out fine, test the preamp tube next to it by setting the V knob to 9 o’clock and the OD knob to 12 o’clock, then turning the OD mode on and performing the microphonics test on the second preamp tube from the left as you slowly increase the level on the OD knob. Same procedure- if you can hear the tapping, feedback, or squeal through the speaker, the tube is microphonic and should be replaced.


Audity One Recording Amplifier

Audity One Manual v4 (pdf)
Audity One Manual v3 (pdf)

Warranty Service

Authorized Distributors

Curious Audio LLC
200 E. Main Street
Newburgh, IN 47630 USA

p: (+1) 828-708-7025