The only Closefield Monitor in The World

There have been many attempts made to design and build a small monitor to use in Closefield which would give accurate results. Contrary to common belief, we maintain that there is no special “Black Magic” or “Guru Art” to designing monitors but a procedure of sound theory applied using laws of electro-mechanical physics. Based on this scientific principle we also argue that the performance of a sound monitor cannot be judged only on subjective grounds but as with all high technology equipment, must be capable of being judged on objective grounds as well. We claim that a mix produced on the Silver 5L system will have the same balance as monitored in the studio with slight tonal changes inherent within the differing playback equipment.

The best way to explain the reason why and what makes us different to everyone else is to show you how Silver 5L measures


graph-frequencyFREQUENCY RESPONSE: Silver 5Ls have optimised frequency response to within +2dB accuracy achieved with the RWRS computer simulation programme. With the option of the BH Bass Augmentor they will reproduce a frequency response from below 20Hz to beyond 20kHz with very low colouration, smoothly, within closefield distances.
graph-waterfallTIME ALIGNED: Unlike other monitors, closefield monitors present a big problem. Drivers on a flat baffle (woofer, tweeter etc.) radiate sound from different acoustic centres, reaching the listener at different times. This is not so serious at mid and farfield monitoring distances but at closefield, time domain will cause serious errors in monitoring balance. Silver 5L have special baffles with true acoustical alignments.
graph-phaseLINEAR PHASE: The term “Phase” is often misunderstood. It’s not something that is only relevant to a speaker being either in or out of phase but a very complicated criteria that governs how a speaker system will behave and be perceived when it is operated with multi drivers and complicated cross-overs. Needless to say, the Silver 5Ls exhibit an exemplary linear phase response kept to a narrow field.
graph-impulseFAST: Digital audio is capable of reproducing transients with great accuracy and require monitors to respond as quickly to the signal without compression, often a failing of badly damped monitors with less than ideal drivers. Using the latest technology and RWRS computer simulation technique, Silver 5L monitors are one of the fastest in the world, ready for any further advancement in digital sound technology.
graph-polarEVEN POLAR RESPONSE: It is important that a monitor radiates sound evenly throughout its entire frequency range and this becomes crucial at closefield distances. Silver 5Ls exhibit a true cardioid response, evenly, at all frequencies allowing the monitors to have wide dispersion characteristics. This ensures an extensive listening area for accurate monitoring.
graph-reverbREVERBERANT DELIVERY: Designing a monitor system to deliver an accurate response in anechoic situations is a very easy task but the ability of this same system to deliver an accurate response in a reverberant situation is very rare indeed. Due to its coherent phase, correct time domain point-source behaviour, Silver 5L/BH system will deliver a response that is essentially the same as in anechoic.

Technical Data

Sensitivity: 87dB at one metre at 2.83 Volts (1W at 8 ohms)

Power Handling: 150 Watts nominal music power (i.e. It can be used safely with 150 Watts per channel power amplifiers as long as amplifier clipping is avoided).

Listening Window: 60(+30) degrees horizontal, 30(+15) degrees vertical (ear level at tweeter axis).


High Frequency Driver: 25mm (1″) very low mass coated fabric dome, ferro-fluid cooled, high energy “Neodymium” magnet, glass reinforced moulded fibre chassis; connected via 2nd order passive high-pass network, forming an acoustic 24dB/ocy Linkwitz-Riley (LR-4) filter.

Mid/Bass Frequency Driver: 115mm (4.5″) controlled break-up polypropylene cone with phase plug, magnesium injected moulded chassis, shielded; 2nd order passive low-pass network, forming an acoustic 24dB/oct Linkwitz-Riley (LR-4) filter; no high-pass filter is used for increased cone damping at the low end (there are no capacitors in series with the driver and amplifier).

2nd Bass Frequency Driver: 115mm (4.5″) same specifications with the mid-frequency driver; passive low-pass network to correct low frequency losses (reciprocal of 4pi to 2pi change-over slope).

Low Frequency Driver:
250mm (10″) paper coned (doped), rubber surround, injected moulded magnesium chassis that acts on a 2nd order band-pass filter together with the low-pass type box.


SILVER 5L (Satellite): Heavily damped non-vibrating MDF box; two separate, low leakage closed cavity loading for the drivers; two-plane front panel for time aligning the drivers.

SILVER BH (Bass Augmentor): Heavily damped MDF box; twin cavity design for efficient band-pass loading of the driver; critically calculated port design for nearly non-existent turbulence induced parasitic output.

Net Measurements

(Width x Depth x Height, Weight)

5L: 260 x 17.5 x 210 mm, 6kg

BH: 410 x 330 x 330 mm, 14kg