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
1 / of8
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.
1/of6
Verfified Roswell Customers
Testimonials
Thank you Roswell Pro Audio for making mics that are so useful and affordable.
David H.
In a world of impersonal services, and generic products, this company stands out.
Rodrigo C.
Matt was awesome at helping me select mics for my studio and what I was trying to do musically.
Joel J.
If you're on the fence about any of Matt's creations, don't be... prepared to be amazed!
Tom E
No matter which Roswell mic I purchase, I feel I've received tremendous value for my money.
Doug F.
Matt is super serious about what he's doing. Don't doubt him for a second!!!
Matthew C.
Absolutely phenomenal microphone and company as a whole!
Brae Jervis P.
Shopping at Roswell was not only easy, but they are very customer oriented. I couldn't be more happy.
Charles C.
I think you build an amazing microphone and the average Joe can afford one. Good on you guys!
Real M.
Matt is passionate about his product and it shows in the care and attention he gives.
Taylor R.
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)
Comparison to Alternative Models
Aztec (another multi-pattern powerhouse)
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).
Colares
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).
Mini K87 (single-pattern Delphos II)
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.
Variant picker
Choosing a selection results in a full page refresh.