API 3124V 4-Channel Microphone/Line Preamp
Best professional tool for capturing character rich studio audio.
Experience classic analog sound with this versatile 4-channel preamp, housed in a space-saving 1U rackmount chassis. It offers 65 dB of gain and Hi-Z instrument inputs for flexible signal routing. Achieve rich sonic character with premium components and an optional 3:1 output transformer tap for vintage harmonic saturation. Fine-tune your levels using variable output controls. Each channel features convenient front-panel switches for a 20 dB pad, 48V phantom power, and polarity reversal, making it ideal for studios and live sound.
$3295.00
Owner Satisfaction
4.7
/ 5
Category Rank
58
/ 606
#58 in Microphone Preamps
Price vs Category Average
+121%
Above average
Channels
4
/ -Channel
Who it's for
- Audio engineers seeking a classic, vibrant sound for their recordings
- Producers and engineers desiring creative tonal shaping and precise level control
- Recording professionals needing dependable, long-lasting equipment for daily use
Who should skip it
- Aspiring engineers and home studio owners with limited equipment budgets
- Engineers prioritizing absolute sonic transparency above all else
- Users expecting an all-in-one solution for comprehensive signal processing
Performance breakdown
Sonic Character
Legendary API circuitry delivers that punchy, classic analog warmth effortlessly.
Saturation Versatility
The 3:1 transformer tap adds rich, vintage harmonic grit on demand.
Gain Headroom
65 dB of clean gain handles even the quietest ribbon microphones easily.
Rack Efficiency
Four channels packed into a single rack space saves precious studio real-estate.
Input Flexibility
Front-panel Hi-Z inputs make tracking instruments quick and seamless.
Build Quality
Rugged, professional-grade construction built to survive years of daily studio abuse.
Key Specs
Channels
4-Channel
Chassis
19-inch Rack-Mount
Rack Spaces
1U
Input Connectors
Analog XLR, TRS
Output Connectors
Analog XLR
Phantom Power
48 V per channel
Input Pad
20 dB
Polarity Reverse
Yes
Know before you buy
Yes, the unit features front-panel Hi-Z instrument inputs on each channel, allowing you to plug guitars, basses, or synths directly into the preamp without needing an external DI box.
The 3:1 output transformer tap is a selectable option that changes the impedance loading on the output transformer. This introduces more harmonic saturation and a slightly compressed, vintage character to your signal, which is useful when you want to add grit or weight to a track.
With 65 dB of available gain, the 3124V is capable of driving most ribbon microphones effectively. However, if you are recording very quiet sources with low-output ribbon mics, you may find yourself pushing the gain near its maximum.
Yes, the 3124V includes variable output level controls for each channel. This allows you to drive the preamp harder to get more coloration from the circuitry while keeping the final output level at a safe, manageable volume for your converters.
Absolutely. Its 1U rackmount design, rugged build quality, and front-panel access to essential controls like phantom power, polarity, and pads make it a reliable and convenient choice for both professional studio racks and live sound rigs.
These controls are per-channel. You can independently engage the 48V phantom power, 20 dB pad, and polarity reverse switch for each of the four channels, giving you complete flexibility when mixing different types of microphones.
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