Warm Audio WA273 1073-Style Two-Channel Microphone Preamplifier

What's better than a 1073-clone mic pre? Two of them! Warm up two channels with Warm Audio's hand-wired homage to the classic Class A British console preamp.

If there's one style of preamp that professional engineers would unanimously agree has defined the tone of pop/rock records for decades, it would most definitely be the venerable '73-style of mic pre. '73-style preamps have been massively used in recording and live applications for many years and are still considered to be the "Holy Grail" of preamp choices today. The Warm Audio "WA73 Family" consists of single and dual channel '73-style preamps (with & w/out EQ), that each pay careful homage to British audio history.

When Warm Audio decided to release the WA273 it was imperative that it met vintage expectation in both design and performance. The tone and sweet character that vintage '73-style mic preamps impart is so unique and familiar, that they had only the pure desire to release sonically accurate reproductions. After years of R&D, careful reverse-engineering, and countless hours of auditioning, the WA273 has been born!

The WA273 is a "Desert Island" boutique preamp, but it can also be classified as a studio and live work-horse. Classic '73-style preamps are known for being versatile tools that work with all kinds of microphones from Condenser, to Dynamic, to Ribbon. The WA273 equally shines on all types of microphones and sources including; vocals, acoustic/electric guitars, bass, drums, percussion, orchestras, keyboards, and even as a tone shaping tool to run partial or complete mixes through. With 80dB of gain and a fully discrete Carnhill Transformer balanced signal read more path, there's no recording, mixing or engineering task that the WA273 can't handle.

UK Custom Carnhill Transformers

Enthusiasts unequivocally get excited about the components used in classic '73-style British preamps. The signal transformers are a common topic of conversation. Vintage units used various versions of transformers throughout the years, but the most coveted were the earliest versions. These are regarded as the most desirable choice due to their fluid and forgiving nature. They saturate sweetly when pushed, and have been known to make engineers cry when they hear how beautiful their mixes sound through them! Warm Audio worked closely with Carnhill Transformers of Cambridgeshire, UK, to design faithful reproductions of these most coveted, early version transformers.

Hand Wired & Hand Assembled

Classic '73-style preamps were often hand-wired and so is the WA273! Guru's claim that a portion of the sought after classic British tone can be attributed to the hand-wired nature of the build. The WA273 is hand-wired and hand assembled, including the pcb components that are all populated by hand.

Capacitors & Signal Path

An important part of classic British tone not often discussed are the different styles of capacitors and output transistor used in '73-style circuits. We found it important to maintain integrity to early British designs by using tantalum and polystyrene capacitors in the signal path and an output transistor choice that is much smoother in the high gain settings than what is typically found in modern '73-style preamps.
WARNING: Cancer and Reproductive Harm - www.p65Warnings.ca.gov.
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- Dual Channel, Class A, '73-Style British Microphone Preamp
- UK made Carnhill Transformers
- Hand Wired, hand assembled
- 80dB of gain - resistor stepped gain switch
- Fully discrete
- TONE button - Changes input transformer impedance for varying tone
- Polarity switch
- 48v phantom power
- 4 position inductor based hipass filter - 50, 80, 160, 300 Hz
- XLR mic input
- Line level TRS input
- TS Send/Receive insert jacks
- XLR & TRS line level outputs
- Direct In, instrument input
- Freq response 20Hz - 20kHz +/-.5 dB
- 19" rackable
- Internal IEC 115v/230v power inlet
Dimensions and Weight in Packaging
Base Item
Shipping Weight: 14.5 lbs
Shipping Dimensions: 25 x 16 x 4 in
Manufacturer Part Number (MPN): WA273

For support or warranty questions, please contact the manufacturer:
Web: https://warmaudio.com/contact-support/

Reviewers gave this product an overall rating of 4 out of 5 stars. (1 ratings)
Submitted June 27, 2023 by Matt W in Philadelphia, PA

"Excellent 73 Style Preamp!"

Overall: 4 out of 5 stars
(see rating details)
This is an excellent 1073 style preamp at an affordable price! I use them in my home studio on an almost daily basis. I love that they have an xlr in on the front, this makes it really easy for me to record stuff in the my control room on the fly or use the input from my snake at the click of a button. The knobs do feel a bit cheap but for the price you can’t beat the sound!

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