Cloudlifter CL-1 with a Rode NT1: why the microphone goes silent
The CL-1 eats the +48 V to run its own gain stage and passes none of it on. A condenser behind it receives no power at all — and it did not need the boost either: 35 dB against a card that offers 69.
Signal Chain Compatibility Matrix
Select gear and parameters for live gain, impedance and SPL calculations.
Input Equipment Setup
PASS: Optimal Signal Chain
Requires minimum +60dB of clean pre-amp gain. Most budget entry interfaces max out at +50dB to +56dB and introduce hiss at max pot. An inline preamp booster (Cloudlifter CL-1 / FetHead) is strongly recommended.
The interface preamp provides sufficient headroom.
$538
$405
-25%Tonal & acoustic characteristics: Flat, wide-range frequency response for clean music and speech. Smooth, warm acoustic character with air-suspension shock isolation.
Technical advisory: With +69dB max gain, the Gen 4 Solo can drive demanding dynamics like the Shure SM7B natively without requiring an external inline booster.
Physical Interconnect Topology
Shure SM7B
Direct Cable Connection (No Intermediate Box)
1x Shielded Balanced XLR Cable (3-Pin XLR Male to XLR Female)
Focusrite Scarlett Solo (Gen 4)
Host: Apple MacBook Pro (M1/M2/M3/M4)
Short answer: do not. The microphone will produce silence, and it did not need the booster in the first place.
The CL-1 is a phantom-powered device that is not a phantom power pass-through. It takes the +48 V arriving from the interface and spends it running its own JFET stage, which is where its +25 dB comes from. Downstream of it, on the pins going to the microphone, there is no phantom power left. A dynamic does not care — that is what the box was built for. A condenser has nothing to polarise its capsule with and nothing to run its impedance converter on, so it outputs silence or a faint hiss. People then test the microphone, the cable and the interface in turn and never suspect the small metal box in the middle.
The arithmetic says the booster was pointless anyway. The NT1 5th Gen is a −32 dBV/Pa condenser: at 85 dB SPL it puts about −38.8 dBu on the cable, and against the Scarlett Solo 4th Gen's +14 dBu ceiling a −18 dBFS target needs only 35 dB. The card offers 69. There is 34 dB of unused range.
What the arithmetic adds: even in the impossible case where the CL-1 passed phantom through, its +25 dB would leave the interface set to about 10 dB. That is not an improvement. A booster earns its place by letting a quiet microphone avoid a noisy preamp's top end; on a signal that already sits 34 dB inside the card's range, it only moves you closer to the input ceiling and raises the risk of clipping on a loud consonant. Boosters are for low-output passive microphones — dynamics and ribbons.