Warm Audio WA273 1073 Style Two Channel Microphone Preamp And EQ
5
12 Reviews
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There is no recording, mixing or engineering task the WA273-EQ can’t handle. If there’s one preamp-EQ that professional engineers would unanimously agree has defined the tone of pop/rock records for the last 50+ years, it would most definitely be the venerable 1073. The 1073 has been massively used in recording and live applications for decades and is still considered to be the “Holy Grail” of preamps today. The Warm Audio WA273-EQ dual channel re-creates this classic British preamp with EQ that each pay careful and humble homage to the original circuit.
Warm Audio WA273-EQ 1073 Style Microphone Preamp And EQ Features:
Dual Channel, Class A, 1073-style British Microphone Preamp with EQ
UK Made Carnhill Transformers
UK made Blore Edwards EQ dual-concentric switch potentiometers
Hand Wired, Hand Assembled
80 dB Of Gain - Resistor Stepped Gain Switch
Fully Discrete
Additional high band frequency EQ points added (compared to vintage 1073)
Led Level Indication
19" Rackable
Internal IEC 115V/230V Power Inlet
When Warm Audio decided to release the WA73 Family it was imperative to them that the products pay respectful homage to the sacred British console history in both design and performance. The tone and sweet character that the vintage units impart is so unique and familiar, that Warm Audio had only the pure desire to release truly sonic accurate replicas. After years of R&D, careful reverse-engineering, and countless hours of auditioning, the WA73 Family has been born!
The WA73 Family of preamps are “Desert Island” boutique preamps but can also be classified as studio and live work-horses. The classic 1073 is known as a versatile tool that works with all kinds of microphones from Condenser, to Dynamic, to Ribbon. The WA73 Family 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, fully discrete Carnhill Transformer balanced signal path, and versatile 3 band inductor EQ.
Hand Wired, Hand Assembled
The classic 1073 was hand-wired and so is the WA73 Family! Guru’s claim that a portion of the 1073’s classic tone can be attributed to the hand-wired nature of the build. The entirety of the WA73 Family of preamps is authentically hand-wired and hand assembled, including the PCB components that are all populated by hand.
UK Custom Carnhill Transformers
1073 enthusiasts unequivocally get excited about the component history in these classic circuits. The signal transformers are a common topic of conversation. The classic vintage units used various versions of transformers throughout the years, and the most coveted were the very first versions made by Marinair Radar. Marinair Radar Transformers are regarded as the most desirable 1073 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 replicas of these most coveted, early version transformers. The entire WA73 Family proudly utilizes these fantastic Carnhill Transformers. We at Warm Audio have not yet heard a modern day 1073-style preamp sound as close to the early vintage 1073 design as do our WA73 Family units with these beautiful custom Transformers.
Capacitors & Signal Path
An important part of these classic British circuits not often discussed is the different styles of capacitors and output transistor used. We found it important to maintain integrity to the original design 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 1073-style replicas.
UK Blore Edwards Switch-Pots
A great sounding 1073-style circuit should be just as reliable as it is great sounding. The complex dual concentric switch potentiometers in the EQ section of the WA73-EQ.
Warranty: 5 Year as of January 23, 2025. 1 Year previous.
Warm Audio WA273 1073 Style Two Channel Microphone Preamp And EQ Specifications
Item #:
WAU WA273EQ
Manufacturer Part Number:
WA273-EQ
UPC:
713541493148
Product Specifications
Warm Audio WA273-EQ 1073 Style Preamp And EQ Specifications
EQ: Inductor based 3 band
Low Band Boost/Cut: 35, 60, 110, 220 Hz
Mid Band Boost/Cut: 360, 700, 1600, 3200, 4800, 7200 Hz
High Band Boost/Cut: 10, 12, 16 kHz
Frequency Response: 20 Hz - 20 kHz +/-.5 dB
Controls: TONE Button, Polarity Switch, 48V Phantom Power, Ground Lift Switch, Output Control
Hipass Filter: 4 Position Inductor Based (50, 80, 160, 300 Hz)
Connections:
XLR Mic Input
Line Level TRS Input
TS Send/Receive Insert Jacks
XLR & TRS Line Level Outputs
Direct In, Instrument Input
Warm Audio WA273 1073 Style Two Channel Microphone Preamp And EQ Specifications
Product Specifications
Warm Audio WA273-EQ 1073 Style Preamp And EQ Specifications
EQ: Inductor based 3 band
Low Band Boost/Cut: 35, 60, 110, 220 Hz
Mid Band Boost/Cut: 360, 700, 1600, 3200, 4800, 7200 Hz
High Band Boost/Cut: 10, 12, 16 kHz
Frequency Response: 20 Hz - 20 kHz +/-.5 dB
Controls: TONE Button, Polarity Switch, 48V Phantom Power, Ground Lift Switch, Output Control
Hipass Filter: 4 Position Inductor Based (50, 80, 160, 300 Hz)
Connections:
XLR Mic Input
Line Level TRS Input
TS Send/Receive Insert Jacks
XLR & TRS Line Level Outputs
Direct In, Instrument Input
Customer Reviews
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Bob 🇺🇸
Verified Buyer
Just buy it already!!!
Got this about a month ago, a scratch and dent deal. However, there wasn't a scratch or a dent anywhere on the unit or even the box, after arriving lightening fast. Such a great looking piece of gear, knobs/pots and buttons all feel smooth but firm. Immediately hooked it up via line in to run some t...
Published date
01/05/24
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Jon H. 🇺🇸
Verified Buyer
That 1073 Vibe at a fraction of the cost
Love this stereo preamp-EQ combo from Warm. Feels like a high-quality piece of kit should. Sounds even better! Such a convenient package - 2 preamps into 2 EQ's. So easy to plug-in, dial up your desired tone, then sit back and let that 1073 magic happen! Controls are laid out very well and easy to u...
Published date
01/26/23
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Jose D. 🇺🇸
Verified Buyer
Best pre for the price
Got this recommended by a friend who mentioned that If you cannot afford Neve you should get these amps Great emulation of Vintage british pres And he wasn’t wrong Used mainly for drums but have used on voice and bass and couldn’t be happier with my purchase Great one!
Published date
10/05/22
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Fair R. 🇺🇸
Verified Buyer
Sweet Neve Sound
The preamps and EQ have character. Just be careful, a little bit goes a long way but you can’t go wrong with this buy. Your tracks will sound a whole lot better and a lot sweeter.
Published date
05/30/22
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Ernst 🇺🇸
Verified Buyer
Creamy warm Neve sound
The preamps are awesome and the EQ is sweet. A little bit can go a long way with the EQ. It is very versatile, you can track with it and it can live on master Bus.
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