Traditional British elegant, uncomplicated and purposeful styling.

These subwoofers can be set to exact frequency ranges. Make no mistake, the crossover networks in the B Series are constructed to a Professional Music Industry Standard.

Can you believe the B3 can be set to rolloff at 22Hz!

REL's B3 - 10" Long Throw Driver.

REL's set-up and positioning differs from other subwoofers. A REL will take advantage of physics and room acoustics to provide deep pressurisation as no other sub-woofer can. It's important that you bring to the set-up process a willingness to do things a little differently in order to obtain these superior results. The end result of your labours will be an utterly seamless integration of true deep bass to a sound system, regardless of the main speaker's low bass capability.

A REL is designed to augment the performance of "full range" speaker systems, to provide linear response down to below 12 Hz. Therefore, for the moment, set aside everything you've been taught about subwoofers and how they are integrated into a stereo or theatre system.

All REL amplifiers are fully DC coupled to avoid phase shifts and compromises in their low end performance. The line level and filter stages are fully regulated to ensure total isolation from the power amp stages. The filter stages are unique designs using the highest quality components.

The capacitors are high quality nitrogen filled polystyrene types of 1% very close tolerance and an indefinite life. The use of very close tolerance components also ensures consistency of performance throughout the production life of each model. The filter board is identical for all B Series models and is designed so that each fine adjustment equates to a semitone, offering musically correct increments of the filter.

There is further filtering of the higher frequencies to ensure optimum performance at all settings of the ABC. The built-in power amplifier is built onto a separate circuit board and uses ultra rugged audio grade MOSFET output devices. The power supply is the engine house of the amplifier, the smoothing capacitors are long life with very low equivalent series resistance (ESR), and the bridge rectifier is very conservatively rated at 35Amps. Most of REL's competitors boast about using 6 Amp or perhaps 10 Amp rectifiers. We feel this is short-changing the customer.

It must mean a higher impedance path between the source of power (the AC mains) and the amplifier supply rails. The transformers are ultra quiet audio quality toroid types with very low losses, these are especially manufactured to our strict specifications. Great care has been taken to deliberately over engineer all REL products to ensure ruggedness in service. This ensures an exceptionally robust, long lasting device. For all practical purposes it will probably outlast its owner!

The Britannia range utilizes an unique (Patent applied for) loading system called Acoustic Resistive Matrix (ARM) loading. This unique to REL system offers significant advantages over conventional reflex loading. Firstly, it significantly lowers the system resonant frequency, this on its own is a very worthwhile advantage over simple reflex loading, but it also offers the very important benefit of much reduced port noise (chuffing). Its action is a cross between ordinary reflex loading and a transmission line.

Because it has similarities to a transmission line, it means it also has less stored energy compared to a reflex, this translates into a faster sound. Rhythmic timing is improved, yet it also offers far higher output sound pressure levels for its driver size compared to a closed box. By designing the port to fire down onto the floor, it means the Britannia series have all the benefits of a downward firing sub, but also all the benefits of forward firing for impact and excellent dynamics for home movies. Remember the very lowest frequencies that are felt, rather than heard, emanate from the port, it is somewhat similar to having two drive units, each optimised for it's particular purpose.

The particular adaptation of ARM loading used in the new Britannia series is a third generation on from our previous methods. A lot of thought and experimenting has gone into these models to ensure they represent the highest possible performance for their size.

Each cabinet is manufactured from 30 mm thick MDF (Medium Density Fibreboard). This is the material of choice where the very highest quality is demanded. There can be no substitute for weight and density as far as low frequencies are concerned.

 

Specifications
Enclosure Type	ARM Loaded with Port
Port Diameter:	2.84 inches
Input Connectors	2-Neutrik Speakon / 2-RCA Phono
Gain Control Range:	80dB
Amplifier Type:	DC Coupled MOSFET
Input Impedance:	100k Ohms, High Level, Two-Channel Unbalanced 100k Ohms, High Level, Single-Channel Balanced 10k Ohms, Low Level (LFE) Black 0dB, Red +12dB
Drive Unit:	10 inch, Long Throw
Low Frequency Response:	18Hz In Room at –6dB
Power Output:	200 Watts
Phase:	0 and 180 degrees
Dimensions (WHD):	13.5 x 22 x 16.5 in. 343 x 559 x 419 mm
Weight:	66 lbs., 30kg