Loksound compatible Bass reflex speakers (20mm x 40mm speaker based).
(Old part number DCCS01-100)

100 Ohm, 1watt. 22mm x 58mm x 9.3mm.
N.B. Price is for One speaker only.

Speakers are the most important part of any loco sound project (other than an authentic sound of course!). We ask a lot of our small speakers, expecting great sound bass response from a speaker that we wouldn't use as a tweeter in our home sound systems!

As sound developers and modellers ourselves we have been looking for ways of improving the bass response within the limited space available in a small loco chassis. We started with the speakers, which are the foundation stone of the system, and set our objectives: Compatible speakers, with Improved performance, in minimal space, with minimal price overhead!

The result is our new range of Bass reflex speakers, to complement our full range of compatible speakers, all of which have been custom designed to enhance the low frequency sound which makes up a large percentage of the spectrum of locomotive sound (for either Diesel or Steam).

DCC Supplies have worked in conjunction with one of the worlds largest micro-speaker manufacturers (Oop's - Oxymoron!) to produce these Loksound OO decoder compatible speakers, which will considerably improve sound reproduction over the 'traditional' sealed speaker design. (See technical description below).

The speaker impedance has been designed to match that required by the Loksound range of sound decoders (100 ohm), and can be used to directly replace the standard speakers without any other consideration.

Initially available in two sizes, both with attached wires. This unit is based on a 40 x 20 speaker, and measures 58mm x 22mm overall, and is a slim 9mm deep. ('Traditional' Loksound sealed speakers measure 44 x 22 x 12 in comparison.)

As the developers of this product, we have full technical information, which is published below.

Bass Reflex, Technical theory of operation.
In contrast to placing a chamber on the back of the speaker which is (almost) air tight, a bass reflex system has a port or vent engineering into the case, which consists of an opening, generally backed with a pipe or duct of circular or rectangular cross section. The air mass in this opening resonates with the "springyness" of the air inside the enclosure in exactly the same fashion as air in a bottle produces a low frequency sound when a current of air is directed across the opening (try it, it's fun!). The frequency at which the box/port system resonates, known as the is determined by the cross sectional area and length of the duct and the volume of air inside the enclosure.

This permits a lower frequency sound to be produced by a smaller speaker than could otherwise do so. The design type augments the bass response of the speaker, and can extend the frequency response of the speaker/enclosure combination to below the range the speaker would reproduce in a sealed box. The enclosure resonance has a secondary benefit in that it limits cone movement in a band of frequencies centred around the tuned frequency, reducing distortion in that frequency range.

Technical specifications