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Dayton Audio RS100S-8 Fullrange Speaker Driver


Dayton Audio RS100S-8 Fullrange Speaker Driver

Note - this driver has been discontinued and is no longer being produced. The Dayton Audio Reference Series RS100S-8 Fullrange Driver is a 4" fullrange driver that delivers high performance at a low-cost ($27US - Dec 2008). The driver features a rigid black anodized aluminum cone, rubber surround and aluminum phase plug built around a heavy-duty 6-hole cast frame with very good ventilation. This little driver also has pretty high excursion (3.5 mm) considering small size. With the heavy cone, the efficiency is a little low - about 83dB @ 1W/1m.

Dayton Audio RS100S-8 Fullrange Speaker Driver
Dayton Audio RS100S-8 Fullrange Speaker Driver


T/S Measurements - Dayton Audio RS100S-8

The Thiele / Small Parameters of the Dayton Audio RS100S-8 Fullrange drivers were measured using the Dayton Audio Woofer Tester 3 (WT3). The parameters I measured matched very closely with those published by the manufacturer and Parts Express. I figure there is a good chance that they also used the WT3. The measurements were made at about 22 degrees Celsius and are the average of two drivers which matched very closely.

 Parameter   Dayton Audio   Parts Express  WT31
Fs 85.0 Hz 83.0 Hz 82.9 Hz
Vas 1.7 L 2.0 L 2.1 L
Qts 0.87 0.82 0.85
Qes 1.16 1.04 1.11
Qms 3.48 3.96 3.56
Re 6.3 Ohms 6.3 Ohms  6.2 Ohms 
Le 0.41 mH 0.15 mH 0.35 mH
SPL 83.3 dB 83.3 dB 82.5 dB

T/S Parameters - Dayton Audio RS100S-8 Speaker Driver

Notes: 1 measurements by diyAudioProjects.com using Dayton Audio Woofer Tester 3


Measured Frequency Response - Dayton Audio RS100S-8

The near field frequency response was measured using a Radio Shack 33-2050 SPL Meter and is shown below.

Measured Frequency Response - Dayton Audio RS100S-8
Measured Frequency Response - Dayton Audio RS100S-8


Review - Dayton Audio RS100S-8

The Dayton Audio RS100S-8 offers very high performance and great value. The driver has a smooth and wide response with very good clarity, detail and dynamics. Most well built small fullrange drivers that offer this level of performance will cost you twice as much or more.

These are higher Q drivers and will work well on an open baffle with bass reinforcement. Sealed and aperiodic speaker enclosures are also a good option. The driver can be run fullrange with a simple baffle step correction circuit and perhaps with an inexpensive tweeter on top. Bass can be filled in with an active subwoofer or two.


Datasheet - Dayton Audio RS100S-8