SubMersive HP & F2 HT+ Amplifier Upgrade
Amplifiers are currently shipping with a 5 week lead time. (as of Feb. 1st, 2025)
This drop-In replacement amplifier for your SubMersive subwooofer, be it original 1000W , HP, HP+, or similar F2 versions brings your subwoofer up to the same performance as we ship in new units today. The 4000W continuous amplifier is capable of driving the unit it is mounted in and an additional slave unit. Feature highlights vs original amplifiers is the addition of RCA Inputs, 12V Trigger, Auto on/off, delay adjustment, and 11 position, detented LF Adjust control. Amplifier ships with the latest DSP optimization for the SubMersive and includes a wire harness that plugs directly into the existing wiring. Only tools required for replacement is a power driver with a Phillips bit.
The new amplifiers includes the following features:
- 4000W continuous power amplifier (with slave connected)
- 2400W continuous power as a single unit
- Capable of driving our passive SubMersive HP-Slave to the same levels as a single HP+
- 4 Conductor Neutrik SpeakON connection for powering optional slave unit
- US designed, high current, high duty cycle, class D amplifier design
- High efficency of up to 95% for maximum power from available home circuitry
- Fully Manufactured in the USA (board level up)
- Nominal 120V operation (HP i+/F2i+ version available for 208-240V operation)
- IEC Power Cord (10′ length included) – right angle plug available
- Connection options
- 12V trigger and auto sensing – 3.5mm mini-cable connection
- LED indicator for power, standby or error codes.
- XLR -Female input (LFE/mono) with looping, XLR – Male output (internal Y connection)
- 2 summed RCA inputs for LFE or Stereo inputs
- Digitally programmable, detented, control knobs for precision adjustment and tuning
- GAIN (volume) control – wide range for matching any system
- LF Adjust (low shelf/adjust extension/room sizing) enabling adjustment of low frequency extension from 12Hz to 27Hz or +/- 8dB shelf (see graphs).
- Low pass crossover 30-120Hz + 200Hz, precise, digital, Linkwitz-Riley 4th Order fitlers (24dB/oct)
- Delay adjustment – 0-20ms for multiple subwoofer blending
- Proprietary DSP performance optimization
- Smooth anechoic/outdoor frequency response
- Carefully optimized, proprietary overload protection – never fear for the well being of your subwoofer while the SubMersive maintains composure to much more intense playback levels
- Smooth power response to 200Hz for seamless crossover with compact speakers
- Shallow sealed roll off maintained in all LF Adjust settings
- Shallow low frequency roll off typically yields 8-12Hz in-room extension
- LF Adjust shelving & room size adjustment allow for a best fit with large to small rooms
Shipping within the lower 48 states is a $35 flat rate.
MFW-15 Mk2 & Turbo X Amplifier
April 25th Update – Amplifiers on backorder. Current lead time of 3 weeks.
Drop-In replacement amplifier for AV123’s MFW-15 subwooofer, originally designed by Mark Seaton for AV123 using custom optimized DSP and a conservatively rated, 700W ICEpower amplifier module. The amplifier is assembled in the US and similar to what we use in our JS-12 subwoofer. The same physical amplifier is used for the original MFW-15 Turbo Woofer and the new MFW-15 Turbo X woofer option, and can be shipped back for reprogramming for use with the Turbo or Turbo X woofer at any time in the future. Save the small 18 x 10 x 4″ box & packing for the amplifier if you might upgrade in the future.
Turbo X woofers are now available to order directly from Parts Express, currently $210 each with free shipping, you can also keep an eye out for sales in the coming months. The new MFW-15X woofer upgrade uses the Dayton MX15-22 woofer and offers a dramatic jump in performance over the stock woofer with limits that are well matched to those of the Mk2 amplifier, while offering a significant savings over what the previous Turbo woofer cost in years past, and is available at a fraction of what the same woofer costs at current prices. The MX15 woofer comes with a durable, high excursion, rubber surround, a triple stack magnet, and bumped and vented back plate. This woofer allows us to put the full power of the 700W ICEPower amplifier to use, where it’s capable of delivering more than 900W into a real speaker load. The tall rubber surround fits perfectly in the original MFW face plate, where the original Turbo required spacers affecting the aesthetic. With roughly double the linear excursion, it offers a significant upgrade over the original MFW-15 woofer.
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Shipping within the lower 48 states is a $25 flat rate.
MFW-15 Mk2 to MFW-15 TurboX Amp Upgrade
We have recently finished testing and optimizing the MFW-15Mk2 amplifier for the drop in TurboX woofer upgrade using the Dayton Audio MX15-22 15″ Max-X High Excursion Subwoofer which can be ordered directly from Parts Express. While many wait for the next run of MFW-15 Mk2 amplifiers which will be shipping in February, those who already own an MFW-15 Mk2 amplifier can order the upgrade programming service here to get their amplifiers updated for the DSP optimization letting the amplifier deliver optimal frequency response and maximum power into the MX15-22 woofer.
1/17/2024 – Ordering is now open. Please click the different selection boxes to read the description of each option to select what you need so far as packing and shipping. Your order number is your return authorization. It should be marked on the outside of the package in marker, and inside with the amplifier. Please do not include power cords, and do not ship in amplifiers without an order in the system.