TL Audio A3 Channel Strip

TL Audio A3 Channel Strip

The TL Audio A3 Channel Strip is a single channel unit, accepting mic, line and instrument inputs. Processing includes gain and phase control, compression and equalisation. A tube stage may be switched into the signal path, with variable drive control.

TL Audio A3 Channel Strip Details

A discrete Class A electronically balanced mic input amplifier is used, delivering superior audio performance with very low noise, low distortion and wide bandwidth. The mic input is suitable for low impedance (150-600 ohm) microphones, with a gain control range of +16 to +60dB. Front panel switches provide 48V phantom power, and 30dB pad for high output mic applications.

The front panel mounted jack socket is suitable for a variety of sources, including electric guitar, acoustic pickup and keyboard. The instrument input has high/low switching, and a dedicated valve input stage.

TL Audio A3 Channel Strip features Phase reverse and high pass filter switches, affecting whichever of the mic, line and instrument inputs are selected.

The tube stage has a variable drive control, with the signal level indicated by the variable intensity “Drive” LED and “Peak” LED. Use of this feature typically introduces 1% to 10% harmonic distortion, predominately second harmonic, without changing the output level from the unit. The tube stage can be selected or bypassed as required.

The Compressor of the TL Audio A3 Channel Strip has continuously variable threshold, ratio and gain make-up, and switched settings for hard or soft knee and fast or slow attack and release times.

The Equaliser of the TL Audio A3 Channel Strip has 3 bands. The HF and LF controls are shelving whilst the mid control is a swept, peaking filter.

Comprehensive switching (via relays) allows the A3 to be configured with the equaliser pre or post the compressor, or with the equaliser in the sidechain, for deessing or frequency variable compressor effects.

A VU meter is provided, which can be selected to either input or output signals. It may also be selected to display the compressor Gain Reduction. In this mode the meter normally indicates 0dB, falling back as the signal is compressed. The amount of compression may be read directly from the dB scale. The meter is also provided with a
“+10dB” switch, which keeps the reading on the scale when driving a high level out (to a DAW, for example). In the +10 mode, 0VU is calibrated as +14dBu out.

Features

  • Discrete Class A and Tube Mono Channel Strip
  • Quality discrete class A preamp
  • DI input for high/low impedance instrument input
  • Phantom Power
  • 30dB Pad
  • 90Hz High Pass Filter
  • Phase Reverse
  • Switchable tube stage with rotary drive control
  • Insert send and return point for attaching additional equipment
  • Direct output for short path audio via insert sends.
  • 3 band EQ with swept mid
  • Compressor section with variable ratio, threshold, attack, release, knee and gain make up.
  • EQ switchable pre and post compression stage
  • Analogue style VU metering for level / gain reduction
  • +10dB metering for use with DAW
  • Compatible with DO-2 card for SPDIF digital output

Specifications

  • Mic Input
    Discrete Class A circuitry from input to output (unless Tube stage In)
    Gain Range: +16dB to +60dB (-14dB to +30dB with pad)
    Maximum Input level: +10dBu (without pad), +30dB (with pad)
    Frequency Response: 10Hz to 40KHz, +0, -1dB, @ 40dB gain
    Distortion (THD + Noise): 0.035%, 20Hz to 20KHz @ 40dB gain
    Noise (EIN): -127dBu unweighted, 22Hz to 22KHz, 150 ohm source termination.
  • Line Input
    Discrete Class A circuitry from input to output (unless Tube stage In)
    Gain Range: -20dB to +20dB
    Maximum Input level: +26dBu
    Frequency Response: 10Hz to 35KHz, +0, -1dB
    Distortion (THD + Noise): 0.03%, 20Hz to 40KHz,
    Noise: -85dBu, 22Hz to 22KHz, @ 0dB gain at input and output.
  • Instrument Input
    Tube input stage, plus discrete Class A circuitry to output
    Gain Range: +8dB to +40dB (“High”), -10dB to +22dB (“Low”)
    Input Impedance: 1Mohm (“High”), 70Kohm (“Low”).
    High Pass Filter: -3dB @ 90Hz, second order.

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The details provided above are drawn from historical documents like advertising brochures or user manuals. They’re shared without bias or review. This info is given solely for your consideration, helping you gauge its usefulness to you.

TL Audio A3

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MXR MODEL 113 DIGITAL DELAY

By Art Boffi

Sound Quality 100%
Build Quality 100%
Usefullness 100%
Mojo/Funk 100%
Reliability 100%

Great unit. Durable (40 years old and still going unlike the imported stuff being offered today). I own several different delays (I.e. ADA, Lexicon, and multi effect units) and this thing matches up to the best of them. Recommended!

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