IGS Audio Double Triode Limiter

Where the great sound begins The Double Triode Limiter (DTL) is more than classic tube triode microphone preamp. The old-fashioned design was upgraded with a musical opto-limiter. The limiter is based on circuit used in 60's and 70's.

The Preamp The DTL is a tube microphone preamp adapted to work with any type of microphone. A wide range of amplification makes it possible to record drums as well as the quietest ribbon microphone. DTL does a great job of recording tracks from external devices such as synthesizers or drums machines (like Akai MPC). Great results are achieved with reamping tracks from DAWs. The DTL adds a nice tube saturation to the sound. The high impendance inputs (HiZ) allow for connecting an electric or bass guitar directly into the grid of the first step of tube amplification (Typical HiZ solution).

The Limiter Additional device capabilities are activated by the Limiter section. This can be used to limit peak levels of the input signal. The component in charge of compression is an IGS Audio custom designed photocell. When the limiter is working it is indicated by a LED labeled "Limit" on the front panel. The limiter controls the louder parts of the signal and prevents from the digital clipping at the inputs of you ADC. Another trick could be using the DTL as a drum compressor or mix buss compressor. It can improve the overall dynamics of the mix and give it a brighter sound. This is a very versatile device for audio processing.

Full of features The audio path of the preamp is a two-stage tube amplifier with an individual drive on both steps. The saturation at the first step depends on the input signal level (with possibility to use Pad -20dB). The saturation of the second step is dependent on the Output regulator. Inputs and outputs are balanced with Carnhill (UK) and Edcor (USA) transformers. The anode voltage is set close to 300V DC. For each of the channels Output and Limiter threshold can be regulated smoothly. The featured switches are: GAIN, +48V, Mic/HiZ, Phase, Pad -20dB. Hi-Z inputs are located on the front panel. The meters show the output signal level.

DEVICE TYPE:

Optical Compressor : Yes

INPUT & OUTPUT:

Input Pad : Yes, -20 dB

Input Impedance (balanced) : 300 Ohm, Carnhill transformer or 1M Ohm for Hi-Z instrument input

Phantom Power : Yes

Output Impedance (balanced) : 600 ohm, Edcor transformer

Audio transformers : Yes

LEVELS:

Operating Level : +4 dBu

Max output level : +22 dBu

Max. gain : 60 dB

Max Gain Reduction : 18 dB

BANDWIDTH:

Frequency response : 20Hz to 20kHz; +/- 0.3dB

DISTORTION (@ 20 HZ - 20 KHZ):

THD+N : <0.1%

FRONT PANEL:

VU Meters : Yes, output level

POWER:

Voltage :115/230V AC, 50 - 60Hz

Power consumption : 40W

Power supply : internal

PACKING BOX:

Dimensions : 70x50x30 cm

Shipping weight : 7kg

OTHERS:

Tube set : 6N1P, 6N2P