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300 Watt Subwoofer Amp Home Theater
Our Story
Fosi Audio was founded with a simple goal: Build products that sound great and make people want to listen to music every day. We design, manufacture, and sell many Hi-Fi audio products on the market. We pursue your perfect music journey. Enjoy Hi-Fi music with Fosi Audio audio products NOW!
Subwoofer Amplifier Full-Frequency Mono Amp
Mini Stereo Audio Amp with SUB Frequency Control
- Power Adapter: 32V/5A
- DC Input Range: 24V-36V
- Terminating Impedance: 2 Ohm - 8 Ohm
- MAX Power Output: 200Watt @2Ohm
- RMS Power Output: RMS 250watt @ 2ohm, RMS 150watt @ 4ohm, RMS 120watt @ 8ohm
- Full Frequency Response Range: 20Hz-20KHz(± 3db)
- Bass Frequency Range: 20-200Hz
- Input Sensitivity: ≤ 0.2mV
- SNR ≥ 106dB
- THD ≤0.03%
- 2 Channel Power Amp: BT20A, BT20A-S, BT10A, BT10A-S, TB10A, V1.0G, V1.0B, TDA7498E, ZK-1002, ZK-502T
- 2.1 Channel Power Amp: BT30A, BT30D, BL20C
- DAC: Q4, DA2120A, DA2120C
- Mono Subwoofer Amp: TP-02, M02, M03
- Phono Preamp: Box X1, Box X2; Tube Preamp: P1
- Tube Headphone Amplifier: T20, P2
- Others: 5654 tube, Power Adapter, Brush, BT05
Fosi Audio Exclusive Design
Switch to PBTL, it's a Full-Frequency Mono amp for driving passive speakers and powered subwoofer. Switch to SUB, it's a subwoofer amplifier for diving passive and powered subwoofers.
High Efficient Power Output
Adopt Texas Instruments TPA3255D2 Chip, MAX power output up to 300Watt, providing 250 watts RMS into 2-ohm loads, 150 watts RMS into 4-ohm loads or 120watts to 8-ohm loads. Strong internals make for A lively listen.
Upgraded DC Outlet
The old version or other brand amplifiers sparks flying when power supply plugin, it's unsafe. With a built-in power protection circuit, there are no sparks flying when you plug the power adapter into the amplifier. Safe for use!
DIY Your Audio System
This amplifier gives you the power and versatility you need to create a professional sound system. Great amp to driver most home bookshelf speaker or subwoofer.
Solid Built Aluminum Alloy Enclosure
Curved edges and sleek controls accentuate its unibody design. With truly useful features, and thoughtfully designed premium enclosures.
32V/5A Power Supply
Fosi Audio M03 amp comes with the energy-efficient and stable power supply which got authoritative certification by many security tests, can get an astonishing sound.
Ignacio
Reviewed in Spain on September 2, 2024
todo según lo esperado
Egbert
Reviewed in France on December 7, 2024
Tres bon pour une subwoofer. Not very loud but very good detailed in low bass sound.I’am using this for a 15” Dayton sub using an 10A power supply instead the standard 5A.
giancarlo
Reviewed in Italy on December 20, 2024
Direi ottimo amplificatore per un sub passivo, buona potenza con l'alimentatore fornito.Rapporto prezzo/prestazioni super!
Steve C
Reviewed in Canada on January 4, 2024
This amp is all metal. The unit itself is not large.The power adapter is large so that is where most of the power is coming from. This makes it easier to hide and keeps the main unit smaller. The cable from the adapter to the wall plug is long and the cable from the adapter to the unit is also long so its easy to hide.The controls on the front are easy to understand and use. The rocker switches have a positive click in place. The knobs are smooth. The power LED is bright.The adjustable Sub Frequency is nice to fine tune your crossover frequency.The connectors in the rear are well labeled and the speaker terminals accepts bare wire (~12 AWG) banana plugs or spades.I connected this to a Boston Acoustics 12 inch passive subwoofer which had a blown plate amp. This drove the woofer fine, but the power is more suitable for a 8-10inch driver. Still punchy but not a lot of headroom. Output will depend on your speakers efficiency and resistance (2-8 ohm).No hum or feedback.note: this amp has a dedicated power switch, you have to physically turn it on and off - it will not automatically power on when an audio signal is sent like regular subwoofer amps do.
Shane
Reviewed in Canada on March 7, 2023
I have a PSB subsonic II with a dead internal amp. The driver is 12" 4ohms. I took out the internal amp and connected the driver directly to this little guy and it is more than powerful enough to drive it. Sounds amazing, I wouldn't dare go past halfway on the volume dial. I leave it at 1/3 volume unless I really want to pump the bass. The unit feels very solid and has satisfying click/notches for every incriment of the volume & crossover knobs. Admittedly there is a low hum if you put your head next to the sub when the room is silent but it's not noticable otherwise for me. It gets barley warm left running 24/7. If you're looking to replace a dead internal subwoofer amp I highly recomment this one.
Chris Skanderup
Reviewed in Canada on December 31, 2023
Drives a 12” Klipsch subwoofer that the plate amp died on. Seems to work just fine.I don’t run it anywhere near wide open-I can exceed X-max on the driver fairly easily on bass heavy movies.It is capable of more power with the bigger power supply you can order separately-but the supplied one works for my needs.
Night Hawk
Reviewed in India on November 9, 2023
Read reviews, bought the item with high expectation. But the sound output is weak. This amplifier is for active subwoofer, not for passive subwoofer. In short, this amplifier needs an amplifier.Update: After putting this amp aside for months, I recently found out that the "aux output of Aiyima A08 Pro" is the main culprit all along. I was wrong for pointing finger to this little champ. After feeding the right amount of power to its inputs, it rattles the windows. WOW...She deserves 5 Stars, not 3!
bigGuy19
Reviewed in Canada on August 28, 2022
sounds awesome powering a single 10” in ported enclosure through my home theatre receiver just right.my only concern is it doesn’t fully turn off. the power supply light stays green even when the unit is switched off and needs to be unplugged or turned off with a power bar. though it might not be a problem if your receiver has 110 outlets for other components.otherwise great sound quality and nice deep sound with very low distortion once the receiver volume levels are set.I did watch some output testing prior and it is about half the rated wattage for outputmetered at 102-114Watts @ 4ohms could use a better power supply capable of more output but its enough for my needs.a larger 12-15” sub or multiple subs you might want to consider a separate dedicated amp like a Crown XLSfor a single sub set up used for gaming, computer or average home theatre this works perfectly.
Russell
Reviewed in Canada on June 23, 2022
Received this Fosi Audio M03 subwoofer amp on June 21, 2022 for my outdoor solarium. After doing the research and comparing it with other brands that cost much more, this one makes the best sense. I am using this amp connected to my Receiver Amp sub out, this is a two in one sub amp, it has a full range/ bass working mode switch, you can use a full range and a bass speaker by switching to PBTL or Sub alone.It made it easy for me to connect two subwoofers simultaneously one passive and one active placed at two different corners of the room to complement my full range ceiling speakers. This amp is 200 watts with an impedance between 2 to 8 ohms and 40Hz to 300Hz low frequency and a master control, which gives you the option to shape and control the sound for your listening pleasure. The amp delivers clean crisp solid Bass to my 6-inch subwoofer speakers either listening to music or a movie on TV. Lastly, you can increase the watts from 200 to 300 by asking the seller to send you the larger DC 24 to 35-voltage transformer. I do recommend this amp to anyone who may thinking of purchasing it.
David
Reviewed in Australia on December 17, 2022
Great little amp. It's not 150rms into 4 ohms thats for sure, might be about 100rms, but for the money it is great value. I built a custom shallow sub to fit under a tv unit, using a 10" Soundstream shallow sub (sealed) rated for 250rms, and it drives it great. I probably wouldnt want to drive anything bigger to drive it well. It makes amazing sound and easily keeps up with my B&W 606s playing loud, and I am only running this amp at just over half, with my receiver sub out at -3db. If your priority is sound quality and need something small and convenient, this is well worth a buy. And I think if you arent running it hard, which I certainly dont need to, longevity wont be an issue. Love this little amp and glad I found it.
Customer
Reviewed in Canada on January 3, 2022
Let me salvage my subwoofer speaker when its amp blew up. Instruction text is very tiny. Not so happy about that. But works well.
VIVIANE PAUZE
Reviewed in Canada on December 14, 2021
This is not 300 watts maybe 80 watts bit not 300 watts
Ryan O.
Reviewed in Canada on June 29, 2020
I had a Dayton Audio SPA250 powering 2 Aura Pro bass shakers. It worked like a charm, but it was large, ugly and probably very over powered for what I needed. After finding this sub woofer amp I was curious if it would make a good substitution at a cost savings compared to the Dayton. I think this Fosi amp does an admirable job at powering two shakers and wouldn't investigate to use this product for such a purpose.. The Dayton definitely felt more powerful and more violent, but that's not necessarily a good or bad thing.
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