The Tube-Tech recording channel MEC 1A is a combined microphone and DI preamplifier, equalizer and optical compressor intended for recording directly to any recording media. Microphone preamp: The microphone preamplifier consists of a microphone input transformer (with a static screen) with a step-up of +10 dB, two dual tube preamplifiers with two ... Click To Read More About This Product
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The Tube-Tech recording channel MEC 1A is a combined microphone and DI preamplifier, equalizer and optical compressor intended for recording directly to any recording media.
The microphone preamplifier consists of a microphone input transformer (with a static screen) with a step-up of +10 dB, two dual tube preamplifiers with two stepped gain switches, one with 10dB/step (coarse) and one 1dB/step (fine) giving a total gain range of +20dB to +70dB. The microphone input is provided with a switchable -20dB attenuation (PAD), switchable +48 V phantom-power and phase reverse. A highpass filter for the microphone and the DI input is switchable between off, 20 Hz and 40 Hz.
The microphone input is capable of accepting levels of up to +6 dBU (1.55V) at 40 Hz without the PAD. With the PAD switched into the circuit, the MEC 1A can be used as a unity gain line amplifier accepting levels up to +26 dBU (15.5V) at 40 Hz. The high impedance DI input is unbalanced and placed in the circuit directly after the input transformer. The gain range for this input is +10dB to +60dB. When in use, the microphone input is disabled.
The equalizer has low and high shelving filter with a gain range of +/- 15dB, each with 6 switchable frequencies and a band filter with a gain range of +/- 20dB, 12 switchable frequencies and a bandwidth control. The shelving and the bell filters are designed around a dual tube operational amplifier. The equalizer has a separate in /out switch.
The compressor is of the optical device type. It has controls for ratio, threshold, attack and release. A switch selects between manual attack and release and fixed attack and release. With the link switch it is possible to link several units together on two independent bi- directional buses. The compressor has a separate in /out switch. In normal operation the equalizer is in front of the compressor, but a switch enables the compressor to be in front of the equalizer.
Tube based "All-in-one" recording channel
+20 dB to +70 dB Gain mic preamp
Phantom Power (+48 V)
-20 dB pad
High-impedance DI-input (>1 Mohm) for direct connection of guitar, bass or keyboard
Three band equalizer
6 Low shelving frequency choices
6 High shelving frequency choices
Bell type Mid section with 12 switchable frequencies
Separate in/out switch
Compressor with optical gain reduction element
Linkable for stereo applications
Variable Attack and Release parameters
Ratio 1.5:1 to 10:1
Separate in/out switch
Impedance Input Mic. Preamp: >1.2 kohm Input,
Impedance Input DI: 1 Mohm/82pF
Impedance Output: < 60 ohm
Frequency response @ -3 dB: 15 Hz to 80 kHz
Distortion THD+N @ 40 Hz 0 dBu: < 0.10 % +10 dBu: < 0.10 %
Noise Rg=200 ohm Output Gain @ 20 dB 60 dB 22 Hz-22 kHz: < -82 dBu < -60 dBu CCIR-468-4: < -72 dBu < -50 dBu
CMRR @ 10 kHz: < -60 dB
Max. output @ 1 % THD+N: > +26 dBu
Gain Mic. Preamp: 20 dB to 70 dB DI: 10 dB to 60 dB
Compressor Ratio: 1.5:1 to 10:1 Threshold: off to -20 dBu Attack: 1 ms to 100 ms Release: 60 ms to 2 s
Tubes ECC 81 3 pcs ECC 82 1 pcs ECC 83 3 pcs
Dimensions (H x W x D): 3.5" x 19.0" x 8.1" (2 units), 88 mm x 483 mm x 205 mm
Weight: 12.1 lbs, 5.5 kg
Power requirements @ 115 V/230 V, 50-60 Hz: 30 W
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