![tannoy dual concentric speakers tannoy dual concentric speakers](https://musictech.com/wp-content/uploads/2014/06/fa.jpg)
They suggested a 300 litre box withfour ports, each of 100mm diameter and 250mm length and this is what I havebuilt. I wrote again to Tannoy and asked for suggestionsfor the best simple box for my drivers.
#Tannoy dual concentric speakers drivers#
Isuspect the program expects higher Q drivers when it tries to find an optimum.Be carefull that software doesn't tell you nonsense. It came up with an impossibly smallbox, tuned impractically with a -3db point somewhere well above 100Hz. A friend with box modelling software plugged in the 3838 parameters to seewhat was suggested for a flat alignment. This suggests to me that the parameters for the 15" dual concentricshave changed very little from model to model and published Thiele and Smallparameters for later drivers could give an indication of what to expectfrom the earlier ones.
#Tannoy dual concentric speakers driver#
The horn designs were drawn in the 1950s so wereintended for earlier versions of the 15" dual concentric but had beenmodified (only the driver mounting) for the 38 drivers from around1980. Unfortunatelyplacement hard into the corners wasn't going to suit my room and the wood-worklooked very complex. It should reduce driverdisplacement for any particular output level and thereby reduce distortion.I expect the Autograph sounds very nice but have not heard it.
![tannoy dual concentric speakers tannoy dual concentric speakers](https://i.ebayimg.com/images/g/RPwAAOSwBV9hJUF-/s-l300.jpg)
Horn loadingthe bass cone should be a good thing in theory. Thus the corner extends the horn mouth into the room. The rear hornsplits part way through the box to exit next to the two side walls of thecorner. The crossover allows the input of the tweeter (from 1KHz)to be stepped up to match the increased output below 1KHz. The fronthorn loads the main cone from around 200Hz to 1KHz and the folded rear hornloads below 200Hz. It has approximately 600 litres total volume. The currently produced Westminster enclosure seems to be a rectangularversion of this box.
![tannoy dual concentric speakers tannoy dual concentric speakers](https://hifiheaven.net/shop/image/cache/catalog/Tannoy/DC6i-750x750.jpg)
It has a short front horn and a foldedrear horn. The Autograph designin particular looked really nice. The other two were horn enclosuresintended for corner placement (GRF and Autograph). One of thehorn plans (Professional or Rectangular GRF) didn't appeal because the driverwas placed even lower than the Lancaster and I already knew that it wasnice to get the drivers on axis at ear height. They kindly sent me three enclosure plans. I wrote to Tannoy asking them about horn enclosuresfor these drivers. Some of the congestion might have been due to the very heavy grillcloth.
![tannoy dual concentric speakers tannoy dual concentric speakers](https://i.pinimg.com/originals/30/51/b0/3051b08c02c35d1d74075fc7e3d191db.jpg)
The lack of deep bass was a problem due to the boxbeing simply too small, even though by modern domestic standards it wasbig. The tubby sound was I think due to fairly large thin panelswithout any bracing. Otherwise it sounded a bit "sat on".Not so easy to fix was the problem that the bass sounded rather tubby andnot very deep. One of the problems I had with the Lancaster box was that it is too short.When I put it on some bricks to get the driver up to seated ear height thesound opened up considerably. Both Lancaster versions sounded rather congested compared to thedrivers in my new big boxes and with the various improvement described below. These sound OK but with even less bass than my portedversion. In this case the port was sealed up, apparentlyat the Tannoy factory. Afriend bought a pair of 15" Monitor Golds in a nearly identical enclosuretraded in at a local HiFi shop. The original Tannoy box was a Lancaster enclosure(54cm w x 31cm d x 84cm h) with a simple slot cut in the front panel. In my case I have bass down to 20Hz,high efficiency and boxes the size of domestic refrigerators, but don'tthink this means the speakers give only big sound. If you wanthigh efficiency, you must either give up low bass or small, neat boxes the physics says you can't have both. Also high efficiency speakers tend to sound rather more "effortless" perhaps due to less heat being dissipated in their voice coils. Among other things it allows amplifier design to be freed ofthe compromises and/or expense that are required for high power and highgain. High efficiency is a great virtuein speakers. This article should have enough in itthat could be applied to other speakers too.Īmong their advantages are that they are efficientenough to allow the use of low power class A amplification, in my case ahome-built single-ended triode amplifier. The speakers started out sounding promising. Now I have them in a much better and bigger box and havemade some other changes. These were purchased at a garage salea few years ago in the cheapest and most basic original Tannoy box thatI have heard of. This article describes my experiences with a pair of 15" Tannoy MonitorGold dual concentric speaker drivers. Improving the Performance ofa Classic Tannoy Driver.