Ergo IX 2-way DIY speaker kit

Description

These speakers have been discontinued, this page is maintained for reference only

The E-IX 2 way sealed (acoustic suspension) speaker kit was designed to look like a Linn Kan or LS3/5a from the front but sound better than either and boy does it achieve that! It features one of the world’s best 5.25” mid-woofers from Scan Speak in acoustic suspension that is seamlessly mated with a 1” tweeter via an acoustic Linkwitz-Riley 4th order acoustic crossover network. the crossover has been designed holistically with UK and EU living spaces in mind where proximity to the walls is needed. These speakers are also SAM ready for Devialet amps.

Owners can choose between flush mounted and exposed drivers or a recessed and grilled baffle and the standard kit construction allows for both configurations

The Ergo was designed by the user James over on the PFM forum where many forum members have built it. I have made lots of custom versions of this speaker over the last few years and now introduce a kit version of the speaker after many requests.

Depending on the room conditions, the E-IX is generally good for a genuine 50 Hz to 18 kHz. With the benefit of appropriate room gain and suitable amplification, it will have little difficulty reproducing the lowest fundamental note of a bass guitar at moderate volume. However, as it has a sensitivity of only 84dB/2.83V/m, it won’t like being asked to replay AC/DC at realistic levels although at sensible levels they cope jut fine. In a typically compact room, the E-IX should do justice to virtually all kinds of music. Take a look over at this link on PFM to read about James’ own build and for instructions on building your own if you fancy going free style.

https://pinkfishmedia.net/forum/threads/building-the-ergo-e-ix-mini-monitor-loudspeaker-system.112821/

Bill of Materials supplied with this kit

Drivers

2 x Scan-speak 15W8530-K01 Revelator
2 x Morel CAT378

Crossover

2 x 7r5 Jantzen superes resistors
2 x 4r7 Jantzen superres resistors
2 x 1.0mH inductor Jantzen 15AWG P-Core
2 x 0.27mH inductor Jantzen 18AWG Air-Core
2 x 18.0uF capacitor Jantzen cross cap
2 x 3.3uF capacitor Jantzen Z-Superior
2.7uF capacitor Jantzen cross cap

This is the crossover for the Ergo IX includes a custom and professionally made PCB to mount the components which makes it much easier to mount the crossover inside your speaker.

The crossover components are Jantzen mid-range components and as James initially specified with some small changes where components were no longer available, rest assured though that all the L,C,R, DCR,ESR etc are as James initially intended.

The overall size of the box is 304mm high, 255mm deep and 190mm wide giving you a usable baffle size of 166mm wide by 266mm high. If you just require a cabinet for a similar sized project then you the cabinet on ts own here

The price of the kits include a £20 donation to Tony the owner of PFM which was James’ only stipulation in letting me use this design. PFM is a great collection of audio minded folk and some of the best audio DIY designs including this one have come from the fertile breeding ground Tony has enable in the DIY room there, go visit.