Singular Audio has announced the release of a stereo tube saturator for the API 500 series also known as the ‘lunchbox’ format.

This mastering version is the same as the original tubedrve, but with indented/stepped controls for easier recall and stereo matching. It also has a low gain setting which provides an extra -10dB of gain which comes in handy when using it on the mixbus or when mastering.

The tubedrve utilizes 2 pentode tubes per channel, for a total of 4 tubes per module. The first one is an EF86 and the second one a 6AS6. The 6AS6 can be switched from pentode to triode operation. Triode mode provides a smoother type of overdrive with more ‘even harmonics’. Pentode mode provides an aggressive distortion with more ‘odd harmonics’. Switchable bypass and a mix knob for parallel processing provide pro audio requirements.

Singular Audio Tubedrv Mastering front

The two channels are controlled independently from one another. The module can be controlled with an input or ‘drive’ level, controlling the audio signal going to the tubes. A bias control sets the operating point for the distortion tube, allowing the user to control the bias current. With high and low settings this introduces asymmetrical waveform clipping, providing a more aggressive sound.

Input gain can be selected with a 3-way switch and fine tuned with the input knob. An output level control controls the level coming from the tubes. An output level control controls the level coming from the tubes. The mix knob provides full dry and wet operation, allowing for parallel processing. This is a great feature to have in a saturator since they tend to compress audio. Parallel processing allows the user to dial in the exact amount of saturation they want and provides full control over dynamics.

An anodized black aluminum front panel is used, providing a long and lasting finish. Plate voltage for the tubes is 240VDC, due to a DC-DC converter which generates the high voltage from the +- 16V power supply of the API 500 format. This is needed for the best possible overdrive sound. NOS (‘New Old Stock’) tubes are used.

Pricing for the tubedrve mastering will be 709 EUR excl. any applicable sales tax. Modules can be purchased at the Singular Audio store, and will also be available through dealers such as Vintage King, Perfect Circuit and Front End Audio.

More information: Singular Audio