Manley Labs TNT 2-Channel Microphone Preamp

Manley Labs TNT 2-Channel Microphone Preamp

Manley Labs TNT 2-Channel Microphone Preamp

B&H # MAMTNT MFR # MTNT
Important Notice: This item is non-cancelable and non-returnable
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Expected availability: 7-14 business days 
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Product Highlights

  • Two Distinct Microphone Preamps
  • Class A Tube Preamp
  • Solid-State Preamp
  • Variable Impedance
  • Variable Transformer Control
  • Vintage Tape Compression Circuit
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  • 1Description

The TNT 2-Channel Microphone Preamp from Manley Labs offers two distinct preamps with vastly different characteristics allowing for a broad spectrum of colors for processing audio. The tube channel offers a transparent sound with tube warmth, while the cool channel's solid-state design offers a palette of clean tones to heavy distortion. The unit is constructed with professional-grade components, hand-wound transformers and hand-selected tubes.

The tube channel is based on the Manley Slam! JFET / Vacuum Tube Triode cascade circuit that allows for high gain, low noise, and low distortion without using negative feedback. The three variable impedance settings offer near-zero gain change, which allows the user to focus on the differences in mic and cable characteristics.

Inspired by vintage British designs, the solid-state cool channel uses opposite topologies from two different preamps. These high and low impedance preamps are used in tandem. The preamps can be controlled via the variable impedance switch. The high impedance preamp operates in voltage mode and uses a paralleled cascaded ultra-low-noise FET / op-amp circuit. The low impedance preamp operates in current mode with a special Lundahl input transformer, paired with an ultra-low noise, ultra-low distortion op-amp. With a medium impedance setting, both voltage and current preamps are engaged and blended at the output. The iron control knob reduces or exaggerates the effects of the custom-wound output transformer. The '60s / '70s color switch engages a circuit simulating the qualities of vintage discrete nonlinearities, tape overload (tape compression) and changes in frequency response.

The front panel for both preamps feature phantom power, a high pass filter, a phase reversal switch, an instrument input, and LED indicators for level and overload. Hand-made in the USA, the unit is housed in a 1U steel chassis with a CNC-machined 1/4" faceplate that is also inlaid with laser-engraved inserts. The TNT ships with an IEC power cable.

Tube Channel
  • Class A tube preamp
  • 48V phantom power
  • Phase reverse switch
  • 80 Hz high pass filter switch
  • Variable impedance for microphone and instrument inputs
  • Gain matching when switching impedances
  • 1/4" instrument jack for direct injection (DI)
  • Gain Switch: +20 to +70 dB (in +5 dB increments)
  • Trim Knob: up to +10 dB of gain
Cool Channel
  • Inspired by vintage British solid state design
  • 48V phantom power
  • Phase reverse switch
  • High Pass Filter: Flat, 60 Hz, 120 Hz
  • Variable impedance for microphone and instrument inputs
  • 1/4" instrument jack for direct injection (DI)
  • Gain Switch: +20 to +70 dB (in +5 dB increments)
  • Trim Knob: up to +10 dB of gain
  • Color Switch: Clean, '60s, and '70s
  • Iron Knob: Variable knob to reduce or exaggerate the effects of the custom nickel output transformer
Additional Features
  • LED Meters indicate signal presence, input overload, +10 output, +22 output (1st stage clipping)
  • Cool Channel Output Mode Switch: Rear-panel toggle that sets both output level and whether XLR/1/4" jacks are balanced or unbalanced
UPC: 890833000168
In the Box
Manley Labs TNT 2-Channel Microphone Preamp
  • IEC Power Cable
  • Limited 90-Day Warranty, Extends to 5 Years with Registration
  • Table of Contents
    • 1Description
    Number of Channels 2
    Input & Output Input
    Tube Channel Mic: 1 x Combo XLR/1/4" Neutrik Connector
    Cool Channel Mic: 1 x Combo XLR/1/4" Neutrik Connector
    Tube Channel Instrument: 1 x 1/4"
    Cool Channel Instrument: 1 x 1/4"
    Output
    Tube Channel: 1 x XLR transformer balanced
    Tube Channel: 1 x 1/4" unbalanced (+4 dB)
    Cool Channel: 1 x XLR transformer balanced
    Cool Channel: 1 x 1/4" unbalanced (+4 dB)
    Gain Range Tube Channel: +10 to +80 dB (20 to 70 dB in 5 dB steps)
    Cool Channel: +10 to +80 dB (20 to 70 dB in 5 dB steps)
    Maximum Output Tube Channel for 1% THD via balanced +4 XLR: +31 dBu
    Cool Channel for 1% THD:
    via balanced +4 XLR: 30 dBu
    via unbalanced +4 output: 24 dBu
    via unbalanced -10 output: 16 dBu
    Tubes Tube Channel Vacuum Tubes: 1 x 12AT7EH + 1 x NOS 6414 or 6414W
    Input Impedance Tube Channel Mic: 600, 2400, 10,000 Ω
    Tube Channel Instrument: 300 k, 1 Meg, 3 Meg Ω
    Cool Channel Mic: 300, 600, 2000, 2 Meg Ω
    Cool Channel Instrument: 100 k, 300 k, 1 Meg, 3 Meg, 10 Meg Ω
    Frequency Response (Audio) Tube Channel: (-1 dB) 10 Hz to 30 kHz; (-3dB) 5 Hz to 45 kHz
    Cool Channel: (-1 dB) 15 Hz to 30 kHz; (-3dB) 5 Hz to 50 kHz
    THD & Noise Tube Channel (1 kHz @ 20 dB gain): 0.035% typical (-68 dB)
    Cool Channel (1 kHz @ 20 dB gain): 0.01% typical (-80 dB) no distortion products measurable, noise dominates measurement
    Noise Floor Tube Channel: -60 dB typical referenced to +4 dBm
    Cool Channel: -66 dB typical referenced to +4 dBm
    EIN Tube Channel: -120 dB
    Cool Channel: -126 dB
    S / N Ratio Tube Channel @ 70 dB Gain: 95 dB (TRIM has major effect)
    Cool Channel @ 70 dB Gain: 85 dB (TRIM has little effect)
    Distortion Cool Channel Distortion @ 1 kHz using '60s / '70s switch:
    1.5% typical with LED onset (+4 dBu out)
    3% typical with LED fully lit (+7 dBu out)
    Power Specifications 200 mA @ 120 VAC
    30 W
    Fuse: 500 mA Slo-Blo
    Rackmount 1U
    Dimensions (W x H x D) 19.0 x 1.8 x 10.0" / 48.3 x 4.4 x 25.4 cm
    Weight 11.0 lb / 5.0 kg
    Packaging Info
    Package Weight 13.0 lb
    Box Dimensions (LxWxH) 22.5 x 14.6 x 7.9"

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