Bash 300S Digital Subwoofer Plate Amplifier 300W RMS

Brand:| Model: 300S
BASH's patented 300 watt Subwoofer Amplifier technology was developed to offer extreme amounts of power with an efficient operation that escapes most traditional amplifier designs.
  • High power output in a compact, lightweight design
  • Speaker and line level inputs for connection to any stereo
  • Limiting circuit prevents audible clipping and protects woofers
  • Auto On/Off and phase reversal switch
  • No wasted heat and energy for efficient operation
Part # 
Weight: 3.75 lbs.  
List Price$299.99
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Part # 300-750
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Product Details

Bash 300S Digital Subwoofer Plate Amplifier 300W RMS

BASH patented amplifier technology was developed to offer extreme amounts of power without the wasted heat and energy of traditional amplifier designs. Add to this an intelligent circuit design, and you get benefits such as extremely low distortion and high signal to noise ratios. The combination of clean output and high power makes the BASH amplifiers some of the best sounding subwoofer amplifiers on the market. Features: 50 to 150 Hz low-pass crossover, 0° or 180° phase, line level inputs, speaker level inputs, LFE input, master on/off switch, auto on.

• 300 watts RMS @ 0.5% THD into 4 ohm load
• Signal to noise ratio: 105 dB (A-weighted)
• Dimensions: 11" W x 7" H x 4" D
• Cabinet cutout: 10" x 6-1/4"
• Line-in and high-level in crossovers: Adjustable 50 to 150 Hz, 12 dB/octave low-pass crossover, and a fixed 330 Hz, 12 dB/octave low-pass crossover
• LFE-in crossover: Fixed 330 Hz, 12 dB/octave low-pass crossover 

Bash 300S Digital Subwoofer Plate Amplifier 300W RMS
  • BrandBash
  • Model300S
  • Part Number300-750
  • UPC844632001383
  • Product CategorySubwoofer Plate Amplifiers
  • Unit of MeasureEA
  • Product Rating
    (139 Reviews)
  • Weight3.75 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

View similar products to the Bash 300S Digital Subwoofer Plate Amplifier 300W RMS
in the Subwoofer Plate Amplifiers product category.


Bash 300S Digital Subwoofer Plate Amplifier 300W RMS
Bash 300S Digital Subwoofer Plate Amplifier 300W RMS is rated 4.3885 out of 5 by 139.
Rated 5 out of 5 by from Amazing Bass, how sweet the sound!Built a DIY sub and got way, way WAY more than I thought possible. Dynamic! For anyone who isn't convinced enough information in the 100 Hz and below isn't worth the effort. Take the jump! You too will be amazed.
Date published: 2014-04-07
Rated 5 out of 5 by from Used on Klipsch RW12DUsed the power supply board from this amp to replace the burned out power supply that was original to my Klipsch RW12D. I did not use the entire amp, just the power supply. So far has worked great.
Date published: 2014-03-18
Rated 5 out of 5 by from Works very well! Worth the priceHooked this beauty up to an old school 13 inch 8ohm woofer in a large sealed cabinet, and it sounds amazing! I'm unsure of it's output at 8ohms, but it's definitely adequate. It fills my room (20x18x7) and shakes the walls. For the size and weight it seems unconvincing that it's really 300wrms into 4ohms but I'd definitely believe it after hooking it up. Friends were also impressed at the sound it produced.Cons: Didn't come with screws, internal wiring to driver seems a bit thin. I replaced it with thicker wire. Minor cons, still a 5 star product.
Date published: 2014-02-28
Rated 1 out of 5 by from Noise problemI have two of the Bash 300S plate amps amps that are each used to power the built-in subs that are integrated into a pair of high-efficiency, floor standing speakers (one per speaker). While they have sufficient power and ample features they also have what I believe to be a significant design flaw: they both leak a signal up the speaker wire jumpers to the midrange and tweeters. When the Bash 300S is plugged in- even in standby mode- and the amp for the mids and highs is not on (or even disconnected) the plate amp sends noise up the line to the midrange drivers (Fostex FE208EZ Sigma's) in particular and creates an audible hum from the listening chair ten feet away. Since this is a problem with both Bash plate amps that I have and the hum is at an equal volume level I assume that it is not a defect but a problem with the design of the plate amp itself. I suspect the only way to avoid this problem is to run separate inputs from the preamp to the plate amp rather than having jumpers from the speaker's binding posts to the amp. This is a lot more expensive if one uses better speaker wire than having jumpers and then the plate amp will be leaking a signal back to the preamp instead and the noise will then become amplified.I would STRONGLY recommend if you are planning on using this plate amp with higher efficiency drivers and running jumpers between the two of them to check for this problem immediately when you get the amp. I can't comment on other plate amps but I'm sure that there must be a better alternative out there as a proper class D amp should be very quiet by design. Since I am looking for an alternative I will post my results in a follow-up note.
Date published: 2014-02-10
Rated 4 out of 5 by from Great amp but dicey at 4ohmsThis is a really clean, really strong plate amp that absolutely delivers. I'm using it on a Peerless 830847 12" XXLS subwoofer in a vented 3cu/ft box that gives me an on paper F3 of 27hz with no equalization. It shakes the windows in my house and my paintings even play along with the bass notes at high volume. The only oddity is the amp seems to have a current protect mode that kicks in. No clipping was present but it shut down at high volume under heavy load on this 4ohm sub playing a low frequency tone.
Date published: 2014-01-26
Rated 2 out of 5 by from Bash sub amp...I really dont like itI bought this Bash sub amp a while back and the first one was defective and the 2nd one that Parts Express sent me is working fine. However it does not seem to produce the desired output that I expected it to do. I only chose it because of the high signal to noise ratio. the fact that it does not have a bass boost is another thing I dont like about it. the bass output is weak and I should have bough a Dayton or at least a Yung amp.
Date published: 2014-03-06

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Bash 300S Digital Subwoofer Plate Amplifier 300W RMS

Does heat become an issue if I build a box for this amp?

I'm only a budding enthusiast so my friend has been teaching me a few things about amps etc. If I built a wooden box for this, would I need some sort of heatsink or leave the back open?
Asked by: Alfonzo
I just built a sub using this amp for a church youth group. Driving a 12" speaker, this baby is LOUD! You can imagine the kind of workout the amp gets. I too worry about heat, so I checked the amp after a hard night - felt like an elevated body temperature. If it runs that cool under this kind of load it should last a long time. The amp sinks its heat to the panel face, so just be sure and give it some space, and maybe some air.
Answered by: Atlanta Bass
Date published: 2013-01-21

Q: About how to connect the Bash 300 to my sub, and what are the front left and right "Hi level inputs" for?

hey i might get one of these Bash amps one day, I've seen parts of videos online of how people have hooked them up. some put them directly onto the subwoofer box. which is cool if you want it permanent like that. i was thinking of building a box just for the amp and running the wire to my sub. How long is the given wire in the package? can i replace this wire with my own or, if i have to, extend it? also what are the front inputs for?(HI LEVEL INPUTS(LEFT & RIGHT)) I'm new to plate amps.
Asked by: Kaygun
Partial answer:High-level inputs general mean amplified signal. That is, instead of a pre-amp out from your source (receiver, probably), you could run speaker cables to those inputs, which would blow out line-level inputs.
Answered by: Justin
Date published: 2012-03-23

two for one speaker

Is it possible, in a safe way, to use two of these for one subwoofer? I have dayton audio 15 inch sub with 800w. Thanks.
Asked by: altugumut1
For the subwoofer you have, no this would not be possible. To connect two amps to a single speaker to provide more power to it, there are two ways to do this:1. If the speaker is a dual voice-coil (DVC) speaker, then connect one amp to each voice coil.2. Connect the two amps in bridged modeI'm not sure exactly which model of 15" Dayton 800W sub you have, but all of the ones listed here on Parts Express with those specs are single voice-coil subs with a 4 ohm impedance. So, because they are all single voice-coil, you cannot do a DVC setup. Also, since the sub has a 4 ohm impedance, you would not be able to safely connect two of these particular amps in a bridged mode and power this sub. This is because when connecting an amp in bridged mode, the minimum load impedance is twice that of the regular minimum load impedance. So, the minimum load impedance when bridging two of these amps would be 8 ohms.If you want to use your 800W sub to its fullest potential then I would suggest using a more powerful amp.
Answered by: eboyer
Date published: 2012-12-18

Can this amplifier be used with a power supply of 220V outside US ?

Is there a way to increase the Low Pass Cutoff from 330Hz in the stock model to 700Hz low pass for use in powered speaker projects ?
Asked by: soundaatma
my electrician friend put a jumper on it to make it 220v, saw it when we were putting the amp on the sub box, i just forgot to take pictures
Answered by: Wildfire
Date published: 2013-11-02

Can you use other speaker wire to connect the amp to the driver/switch out the stock output wire for longer wire? For example 16 or 12 gauge wire.

I am using this amp in a separate box than the driver and need to use longer wires than those that come stock with the amplifier. Also, I am hooking this to a dual voice coil subwoofer that works best with about 12 gauge speaker wire. Is this going to be possible?
Asked by: cwitt
Yes, as long as you observe proper polarity and insure you do not allow a stray strand of wire to cross terminals and create a short, there is no reason why you can't build your own speaker wire system to transfer to your doul voice coil speaker. Good Luck
Answered by: Nitnub
Date published: 2011-08-24

Does this amp have a bass boost and/or a subsonic filter. If so, what are the Hz values for each?

Asked by: rlejr
Yes it does the default values for it are 1dB boost at 30hz and the cutoff frequency is set at 17.7hz, I am unsure of what order the high pass is but I suspect it's a first order high pass ( 6db/octave)Anyway you can easily change those by changing two resistors on the amp's board to the values given on the amp's boost table:http://www.parts-express.com/pdf/300-750.pdf
Answered by: Domingos
Date published: 2012-09-28

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