Bass Loudspeaker with White Marble Plinth and Top.
Introduction to the SP150 Bass LoudspeakerThe SP150 extends the bass response of a speaker system down to 30 Hz. Designed to compliment the SP62 series loudspeakers it may also be used in any system that needs bass extension. With 'fast low bass' it is particularly suitable for use with electrostatic panel speakers.
The SP150 has been designed for high quality sound reproduction and is of a sealed box construction. The compact enclosure uses two 150 mm metal cone drivers mounted face to face in an isobarik configuration. The SP150 covers the audio spectrum from 30 Hz to 10 KHz.
The much higher frequency response from the 26 gram cones is necessary to accurately reproduce the low octaves and match the tonal characteristics of the main speakers. There are no tuned ports and so all low frequency signals are reproduced cleanly.
The SP150 is normally assembled with the drive units down at floor level, but may be re-assembled with the drive units at the top. A much higher cross-over point can then be selected. with a SP62 series speaker placed on the top.
The SP150 cabinet is made from hardwood panels, not MDF or other composites.
Internally the SP150 walls are heavily damped to minimise vibration and the enclosed volume is filled with a mixture of long hair black sheep wool and acoustic wadding. The two drivers are wired with heavy gauge copper cable to gold plated terminals which have provision for cables up to 7.5 mm in diameter.
The SP150 as shown has a polished hardwood cabinet with White Carrara marble top and plinth.
Drive Units: Bandor-150
See www.bandor.com for further details.
Life expectancy: 100 years plus for the cabinet (the drive units may need
refurbishing before this).
For anyone who may be interested in making a (pair of) loudspeakers to this design here are scans of my original drawings - made on an Apple SE computer with a StyleWriter printer.
150 dpi GIF file drawings (A4) for printing.
Design by: Susan Parker, MIEE.
Please note: Personal Use Only
This page last modified on: 11th October 2004