The Delphos® II is a premium studio condenser microphone, featuring unhyped and natural frequency response, very high sensitivity, and very low self-noise. It has 3 polar patterns (True Cardioid, Omni, Figure 8) and a switchable 10dB pad.
The Delphos always makes it to my final round of favorite vocal mics. It has won many unexpected blind comparisons. It’s a desert island mic for sure.
Tommy Torres multiple Latin Grammy winning artist/producer
The Delphos II is an upgrade to the original Delphos, which helped establish Roswell as a source for no-compromise studio microphones -- devices that regularly compete with and best competitive models that cost three times as much, or more.
The microphone uses a highly optimized transformerless circuit, which provides a pristine signal path. The microphone's circuit boards are manufactured and populated in the US, using the finest components sourced from around the world, including low-noise NOS transistors and custom US-made signal capacitors.
Two switches located on the front of the microphone provide pattern control and pad features. The mic's "True Cardioid" mode increases sensitivity and signal-to-noise ratio by removing the capsule's rear diaphragm from the circuit.
Each Delphos II is built in California, hand-tuned, "burned in," and extensively tested after manufacturing to ensure the best possible performance.
The microphone is painted with a multi-stage enamel finish. The color is dark blue metallic. The ROSWELL logo nameplate is embossed brass.
The mic's Cutaway™ Shockmount allows the microphone to be easily positioned close to a singer or instrument without mount hardware standing in the way. This allows you to take advantage of the microphone's natural proximity effect.
The Delphos II includes the Cutaway Shockmount, a Roswell branded microfleece mic sock, and a flight case.
Hand-selected large-diaphragm condenser capsule captures detail and articulation
Ultra-pristine transformerless circuit reduces noise and distortion
Upgraded DC circuitry eliminates ultrasonic noise
True Cardioid mode increases signal to noise ratio
Omni pattern reduces proximity effect naturally
NOS parts capture vintage FET sound
Custom metallic enamel finish provides durable good looks
Extensive QA/QC procedure ensures that every Delphos II sounds fantastic
Component Details
The transistors in the Delphos II are all NOS parts, no longer made but ideal for this circuit. The JFET is selected for low input capacitance, then manually biased in our shop to maximize signal level without distortion.
Every resistor in both the audio circuit is a low-noise, high-precision metal film type. Special care was taken to select signal-path capacitors for the best sound. The components in the DC circuit were also selected by ear.
Tech Data
Model:
Delphos II
Acoustic Principle:
Pressure gradient transducer
Capsule:
Selected 34mm large-diaphragm design
Diaphragm:
Gold-plated, ultra thin Mylar
Frequency Range:
20 - 20,000 Hz
Sensitivity:
35 mV/Pa
Impedance:
200 Ohms
Signal-to-noise:
>82 dBA
Equivalent noise:
<12dBA
Supply voltage:
48±4 VDC
Output:
Electronically balanced (transformerless)
Physical dimensions:
208 × 60mm; 850g (mic only)
Frequency Response
Couldn't load pickup availability
Delphos II Condenser Microphone
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Three-time Latin Grammy winning artist Pedro Capo records vocals for his 2025 release, "La Carretera," with a Roswell Delphos II.
Photo by Ivan Rodriguez
Gabby Gordon records vocals with the Delphos II.
Javier Reyes (Animals as Leaders) demos the Roswell Aztec, Colares, and Delphos II on classical guitar.
Nyke Van Wyk tracks violin with a Roswell Delphos II. This image is from "The Weight" session; see the entire music video on the @roswellproaudio Youtube channel.
Joseph Mecham uses a Roswell Delphos II on a Fender Reverb amp.
“The Delphos fulfills what I need in a mic—something with character that I can plug in, turn on and have it already sound good without tweaking and EQing the heck out of the recording to get the best sound. I have used the heck out of it!"
“For me, what makes Delphos a great microphone is that it gives amazing character on a recording, especially on the vocals, that I can’t find on any other mics—even those that are double and triple the price. It gives me special textures in the whole frequency range, a sense of both ‘naturality’ and vocals that feel supernatural. The Delphos delivers a perfect vocal that sounds how you would hear it if the person was in front of you singing in your ear. It allows me to create big vocals that are smooth, not boxy, boomy or invasive in the mix. I have never found a mic that can give me the smooth high end the way the Delphos can.”
“The first session I used the Delphos for was when we recorded the trumpets and trombone on Ricardo Montaner’s new album. Horns are particularly hard to mic. They sound one way live but it usually takes a lot of processing to translate accurately on a recording. When I heard the way they sounded through the Delphos, I was blown away. The mic totally captured how the room was sounding organically, but with a depth of character that cut through the mix.
“The mic’s versatility allows me to use it with portable rigs, vocals, acoustic and electric guitars and drums. It has a unique presence on male vocals, achieving great clarity without added sibiliance. It gives me a more authentic tone without having to manipulate the track in the EQ process.”
“One of the first things that struck me about the Delphos is just how good it sounds by itself with nothing on it. It’s the warmest mic I have ever used, comparable to but even better than the Neumann U87. I just plug it into the pre-amp, bring the gain up and get an amazing sound. It’s also the quietest mic I have ever worked with as far as noise floor is concerned. It creates a magical combination with the UAD Apollo pre-amp. I have $12,000 mics in the studio and haven’t turned them on in years because I have the Delphos.”
If you are shopping for a multi-pattern condenser, the Aztec and Delphos II cover a huge amount of sonic territory. The Aztec offers 9 polar patterns, switchable pad, and switchable HPF. Its voicing is closer to the Colares than to the Delphos II, and it creates even-order harmonics (like vintage tube microphones).
Both the Delphos II and Colares are best-sellers for vocals. The Delphos II is often preferred for productions that use heavy processing (tuning, compression, EQ), while the Colares is often preferred for productions where a more natural sound is needed. If you use solid-state preamps without phony DSP "console sim" effects, the Colares will capture tracks like a vintage tube mic would (albeit with less noise).
The Mini K87 uses a similar capsule design, audio circuit design, and voicing as the Delphos II. It has fewer features (no pad, single pattern), and it lacks the "dimensionality" that the Delphos II is known for. If you would use this mic just for VO, choose the Mini K87. Most customers prefer the Delphos II on vocals and acoustic guitar, but if your budget will not accommodate the Delphos II, the Mini K87 is a close 2nd place.
Detailed Specifications
acoustic principle
Pressure gradient transducer
polar pattern
3 Pattern: Cardioid, Omni, Figure 8
capsule
Selected 34mm large-diaphragm design, gold plated
frequency range
20 - 20,000 Hz
sensitivity
35 mV/Pa
impedance
200 Ohms
equivalent noise
<12dBA
supply voltage
48±4 VDC
output
Electronically balanced (transformerless)
physical dimensions
208 × 60mm; 850g (mic only)
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