WA-2MPX
intermediate
$1,399
Used market: $1,145*
Specifications
3 of 8 values have a recorded source- Type
- outboard_preamp·
- Added Gain dB
- 90✓
- Input Connector
- 2x 3-Pin XLR Mic (600 Ω / 150 Ω transformer)·
- Output Connector
- 2x 3-Pin XLR + 2x 1/4" TRS Line Level·
- Expert Description
- En: Two channels of an all-tube preamp with three tubes per channel and a 300 V plate supply. Base gain is 70 dB; a high-gain switch adds a further 20 dB for 90 dB total. The tone control swaps the input transformer between a 600 Ω winding (rated 6000 Ω) and a 150 Ω winding (rated 1500 Ω), and there is a 600 Ω output attenuator plus an 80 Hz high-pass and a tape-saturation circuit. · Uk: Два канали суто лампового преампа — три лампи на канал і анодне живлення 300 В. Базове підсилення 70 дБ; перемикач high gain додає ще 20 дБ, разом 90 дБ. Регулятор tone перемикає вхідний трансформатор між обмоткою 600 Ω (розрахованою на 6000 Ω) і 150 Ω (розрахованою на 1500 Ω); є ще вихідний атенюатор 600 Ω, фільтр 80 Гц і схема стрічкової сатурації.·
- Provides Phantom Power
- yes✓
- Requires Phantom Power
- no✓
- Updated At
- 2026-08-05T22:03:05.121Z·
Expert Audio Engineering Commentary
Gain Staging Advice
The 90 dB figure is only reachable with the high-gain switch engaged, which is a second tube stage rather than more of the first. On a modern condenser the standard 70 dB position is already more than the source needs; the high-gain position exists for ribbons and quiet rooms, and it brings its own noise with it.
Production Warning
The catalogue holds this record as a draft on purpose: Warm Audio publish 90 dB of gain per channel, and the schema's upper bound for this field is 80 dB. The figure is sourced and unambiguous — the bound needs raising before the record can be published, and nothing here should be rounded down to fit.
What the datasheet actually says
Quoted verbatim from the manufacturer’s own page, with the date we checked it. We state what is printed, not what anyone intended by it.
««90 dB, 300 v Single-Channel or Dual-Channel Tube Microphone Preamp» … MSRP $799 … "productName":"WA-2MPX","productType":"Dual-Channel Tube Mic Preamp" … "productPrice":"$1399"»
The same page and the same specification list cover the single-channel WA-MPX and the two-channel WA-2MPX; the headline MSRP shown is the single-channel one. The published gain is stated per channel in the list itself ("90dB Of Analog Tube Gain Per Channel"), so the number does not change between the two boxes.
checked 8/5/2026* Estimated with the depreciation fallback (~82% retained value). · checked on 8/5/2026