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Fit it Yourself?

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Only £30.00 

With Steering Wheel Control
Only £50.00 

B FOUR - 4 Channel 360 Watts Amplifier

£83.35 Save £66.64 (44%)  was:£149.99
5 Stars 5
Quickfind Code - 33296
Quick Summary:

German engineering and craftsmanship combine to create a sleek amplifier that'll make your vehicle come alive with crystal-clear, powerful music. The Helix Blue B FOUR 4-channel amplifier puts out 60

Condition: New

Save £66.64 (44%)
rrp: £149.99
This product has been discontinued

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Sorry, this product has been discontinued. We recommend the following product.

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Key Features


German engineering and craftsmanship combine to create a sleek amplifier that'll make your vehicle come alive with crystal-clear, powerful music. The Helix Blue B FOUR 4-channel amplifier puts out 60 watts RMS each to your full-range speakers, both front and rear. Or, you can use the B FOUR in 2-channel mode to power a couple of subwoofers with up to 180 watts RMS each. Product Highlights: 4-channel car amplifier 60 watts RMS x 4 at 4 ohms (90 watts x 4 at 2 ohms) 180 watts RMS x 2 bridged output at 4 ohms (4-ohm stable in bridged mode) Class A/B design variable low-pass filter (15-4000 Hz) variable high-pass filter (40-4000 Hz) bass boost (0-18 dB at 45 Hz ) speaker-level inputs via 8-pin harness preamp inputs and outputs 8-gauge power and ground leads recommended — wiring and hardware not included with amplifier fuse rating: 25A x 2 14-1/4'W x 2'H x 10-1/4'D Amp seems to be a great valve. Excellent performance for a medium priced amp. Output seem to be better than the rated wattage. VERY clean. You are also able to do a band-pass crossover - High Pass crossover combination which allows me to bi-amp my component speakers without a crossover. No other amp in this price range can do this. Pros: Great sound, Great flexibility due to better than average feature set. Better sound than my JL Audio Slash series amp I replaced. Cons: It wasn't free. Got this amplifier for a good price somewhere, but anyway this amp is an extremely solid aluminum frame with heatsink fins that go out 1/4' to 3/8' and offer better cooling than other amps of equal power handling I am currently running 2.7 ohm polk mobile monitor 5x7's to this on every channel and it barely gets warm, so I'd assume this would stay even mildly warm even on a hot summer day on a 2 ohm load The sound quality is phenomenal but even with hearing it and tuning it by hand sounds good if you can, BUY THIS AMP, it's one of the best of the best for this good price range other than the helix esprit tube amplifier, but that runs double useful features: the active crossovers are amazing and allow for an assortment of functionality to this amp whether you plan on running tweeters, mid range or subs on this amp it'll do it to its best for tweeters it can cut off up to 4khz of signal to give the passive crossovers on back of speaker less work for dedicated mid drivers, you can turn on the low pass filter and and cut off the highs up to your desired frequency and the high pass will remain on to cut off the extreme lows as a band-pass filter and allow your midrange to only the intended range for subs, it can do the same with the low and high pass and the high pass will protect your subs from overexerting when in a ported box as you could put it down to 15-25 hz and cut off the low lows and each channel has a 0-18 db 45 hz bass-boost for each channel Pros: Through hole terminals go at an angle to grip the wire better than average amps, solid cooling Cons: A bit hard to get screws through mounting holes because of aluminum fins, but cutting the fins would ruin the aesthetics of the amp

Download image of  B FOUR Click here for Image of B FOUR
Technical Specification
  • 4 x 90/60 Watts RMS @ 2/4 Ohms
  • 4 x 180/120 Watts MAX @ 2/4 Ohms
  • 2 x 180/360 Watts Bridges @ 4 Ohms
  • Frequency Response 10 - 30,000 Hz
  • Bass Boost - 0 - 18 dB / 45 Hz
  • Highpass - 15 - 4,000 Hz adjustable
  • Lowpass - 40 - 4,000 Hz adjustable
  • Bandpass - 15 - 4,000 Hz adjustable
  • Total Harmonic Distrortion - < 0.03%
  • Signal to noise ration - >95 dB
  • Samping Factor - 200
  • Input sensitivity - 0.2 - 6 Volts (RCA) / 6 - 20 Volts (Highlevel)
  • Input impedance highlevel - 30 Ohms
  • Imput Impedance RCA - 22 kOhms
  • Dimensions (H x W x D) 2 x 10.2 x 13 inch
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Fitting Services

Need help with Installation?

Here at CarAudioCentre we offer a professional and reputable fitting service in all our stores. For all fitting enquiries and bookings please visit or call one of our nationwide stores. Our fitters can install your new car stereo, DAB radio, audio visual, speakers, subwoofers or amplifier. We can also help to connect your iPod or MP3 player to you existing audio unit and can offer the best advice on the right in-car entertainment for your vehicle, to further this more we also offer a total 100% custom installation service for demo and show vehicles. So if you have an idea come on in and run it past us, the possibilities are endless and we are never too busy for an enthusiastic chat about our favourite subject.

Please note:

"That our two year warranty on products is only applicable to purchases made directly from us and that have been fitted in one of our stores."

Our Stores:

120 - 122 Alfreton Road, Nottingham, Nottinghamshire, NG7 3NR
Tel: 0115 9624 986
743-745 Eastern Ave, Newbury Park, London, IG2 7RT
Tel: 0208 599 2368
835 Garratt Lane, Tooting, London, SW17 0PG
Tel: 0208 971 9181