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ProAudioStar DJ GEAR INSTRUMENT GEAR LIVE SOUND RECORDING MICROPHONES HEADPHONES ACCESSORIES SOFTWARE LIGHTING BUNDLES Authorized Dealer Warm Audio WA-2MPX 2-Channel Tube Microphone Preamp Dual Mic Pre Ampex 351 2-Channel Tube Microphone Preamplifier - Open Box - Description Some History Is Worth Repeating The WA-MPX is an authentic reproduction of the vintage tape machine tube preamp that started the birth of rock ‘n’ roll known for pure analog warmth, delivering an impressive 300v of raw power & 90dB of tube gain. During the golden era of tape recording, the original 351-style tube preamp became the kings of studio tech and signature sound in the signal chain of hit recordings for artists including Elvis Presley, Bing Crosby, Les Paul, Nat King Cole, and Roy Orbison and producers like Steve Albini- a timeless sound that continues to be pursued by elite audio engineers today. With premium components, true-to-original circuit design, and selectable tape saturation, the WA-MPX authentically reproduces all the analog tone of the original to bring vintage warmth & color to your sound. An Authentic Vintage Experience The WA-MPX preamps are hand-wired with 100% discrete electronics. Each channel boasts three tubes that, with the high-gain switch engaged, bring the WA-MPX up to an incredible 90dB of gain. Each channel has custom-wound, large-core CineMag transformers on the inputs and outputs - bringing each preamp circuit to 300v. WA-MPX pres are housed in steel chassis with a brushed aluminum faceplate, vintage-style bakelite knobs, and amber-tinted VU meters. All of these key components paired with traditional build technique deliver not only a legendary “tape-era” tube pre but one of the best values in an all-tube microphone preamp on the market today. Following the Warm Formula of true-to-original tone driven by premium components, all WA-MPX are carefully hand-inspected & tested at Warm Audio Headquarters in Austin, Texas. A Tube-Based Tone-Shaping Workstation As a premium tube mic pre, WA-MPX delivers a wide range of analog tone; from clean volume with preserved clarity for quieter sources to richer distortion that can be driven harder as the tubes are pushed to saturation. The WA-MPX sports a set of critical controls that meet the demands of everyday professional audio use including input impedance switching, +48v, polarity inversion, and input/output gain. In addition to the 80Hz hi-pass filter that can help tame unwanted bass frequencies, the WA-MPX also houses a 2kHz low-pass filter to shave off excess highs for a more vintage tone profile. The classic Warm Audio “tone” control alters the input transformer impedance for extra analog color. A “high gain” control engages an extra 20dB of tube gain to take the WA-MPX all the way to 90dB - very useful on lower output dynamic and ribbon mics. Finally, the Tape Saturation control on the WA-MPX engages a discrete circuit in the signal path adding natural compression, harmonic distortion, and focused tone filtering to emulate the sound of tape machines running at 15IPS, adding just enough imperfection to the signal, especially when used on program material for mixing and mastering. The WA-MPX is far more than just a pre with the vibe of analog tape, it's a perfectly adaptable and extremely powerful tube mic preamp. Premium Components - Elite Build Quality - Superior Sound Premium 12AX7 & 12AU7 Vacuum Tubes Using three premium vacuum tubes, two 12AX7s & one 12AU7 per channel, the WA-MPX delivers both high headroom and harmonically-rich vintage analog tone only found in the most unattainable tube microphone preamps on the market. American-Made Transformer From CineMag The history of CineMag transformers goes all the way back to the 1940s with connections to some of the most sought-after audio equipment of the last century. The particular CineMag output transformers inside with WA-MPX pres are custom-wound with a very large core. Like all CineMags, the input & output transformers on WA-MPX are American-made and built to exacting standards. The huge headroom and added analog color of the transformers pair beautifully with the premium tubes inside WA-MPX. Features/Specs Authentic Reproduction Of The Most Revered Tape-Era Tube Preamp Fully Discrete, Hand-Built Construction With 3 Tubes Per Channel For Ultimate Analog Tone Selectable Tape Saturation Adds Harmonic Distortion & Natural Compression 90dB Of Analog Tube Gain Per Channel Custom-Wound, Large-Core CineMag USA Transformers Mic Input : 600Ω Transformer (6000Ω Rated) Mic Input With “Tone” Engaged : 150Ω Transformer (1500Ω Rated) Premium (2X) 12AX7 & (1X) 12AU7 Vacuum Tubes 600Ω Output Attenuator Engage High Gain Control For An Added 20db (From 70db To 90db) Of Clean Gain For Low-Output Mics And Low-Volume Sources 48v Phantom Power & Polarity Switch Classic Warm Audio Tone Control That Alters The Input Transformer Impedance Adding Extra Analog Color 80Hz High-Pass Filter To Control Unruly Bass Frequencies 2kHz Low-Pass Filter To Focus Preamp Power & Warmth On Mids For Added Punch Inputs : XLR Mic, TS Instrument & TRS Line. Outputs : XLR / TRS Line Level VU Meter Level Indication Frequency Response : 20Hz-20kHz Aluminum Faceplate, Steel Chassis, & Vintage Bakelite-Style Knobs Internal IEC 115v/230v Power Inlet We are authorized dealers for all these brands. Click a logo to see our listings. ProAudioStar is also not responsible for any taxes, local duties, or fees outside of the USA and those are not included in the sale price or ship charge. If an item is refused by the buyer, ship costs to and from the destination in which the item was shipped to are not refunded. Please note the cost of return shipping is usually double of what the original ship cost. Shipping is not free to HI, AK, and PR. FREE SHIPPING ONLY TO THE LOWER 48 STATES. We provide free shipping to the contiguous 48 United States, on most items. Shipping fees to ALL OTHER LOCATIONS will be calculated individually and added to customer invoices. ProAudioStar is also not responsible for any taxes, local duties, or fees outside of the USA and those are not included in the sale price or ship charge. In the event that the customer refuses a shipment, all shipping costs to and from the country or State in which the item was shipped to are not refunded. Please note, in some cases return shipping can cost as much as double the original ship cost. We operate a 30-day return period. Items must be returned with all original packaging as well as all included items. Items that are not returned in original, resalable condition are subject to a 15% restocking fee. We charge a 15% restocking fee on returned items only if the item is clearly used and or the packaging is tarnished. A 10% re-stock is more likely if the unit comes back in mint condition. The ship cost we paid to ship your item will be deducted as well. In some cases restock fees and ship costs can be applied as a store credit. We will exchange a defective unit for the same unit within the 30-day period. After that period, you will have to work directly with the manufacturer for warranty service. Items that can not be returned include: software, units with contents or packaging that is damaged/missing, and items that are considered for personal use (such as earphones, headphones, microphones, instrument mouthpieces, harmonicas or other items that you wouldn't want to purchase if someone else had previously used them). Also, Items which we do not normally stock (i.e. "Special Orders", discontinued products, close-outs, used products, etc.) are non-returnable. We strongly suggest that you check your order after receiving it to be sure that it is in proper working order. Please contact us for a Return Authorization before returning any items.