Clone of PMC DB1+ ???

[Bigun]

Does anyone have enough insight to suggest how it might be possible to make a clone of this speaker ?

http://www.pmc-speakers.com/docs/145...b4df_DB1-C.pdf

The claim is that this is a TL design in a bookshelf sized box ?

(I have a pair of FB1's and they are really nice).

[burnett]

These are the Information I found across the net about the speakers:

Drivers:

Vifa D27TG-30-06 and M13WG-08-09

Enclosure: see attachment

[burnett]

Inside pic

[MJL21193]

I did a similar build here using similar drivers.
They sound good but I think they could have been as good (or better) with a simple ported box, avoiding some build and design complexity.
The advantages of TL are realized with larger midbass drivers and boxes.

[Bigun]

My first DIY speaker was a ported box:

My 'Moon-Onken'

but it's a full-range, so the bass is limited. However, the real issue is that I find that the PMCs have a smoother response, I can listen to them for much longer without fatigue and they give up only a very little in the way of high end detail against the Onken's.

Since my existing PMCs are a TL design I am wondering if this approach is partly responsible for the smoother sound, or if it is the drivers. I still have to try out some of the cone treatments recommended by Dave (planet10) to tame the high end a bit but I feel a new project coming on later this year involving a stereo amp design and a new pair of DIY speakers. Which direction to go for clean, smooth and decent low end ?

[planet10]

Here is a dimensioned drawing based on the pdf of post 2.

Perhaps someone with MJK could model the line (assumming that the drive ris a stock VIFA and not a custom OEM)

dave

[planet10]

Originally posted by Bigun
, the real issue is that I find that the PMCs have a smoother response, I can listen to them for much longer without fatigue and they give up only a very little in the way of high end detail against the Onken's.

That is almost surely all on the big 7 kHz peak inherent to the FE127e. Pretty easier to reduce that issue dramatically.

dave

[Bigun]

Originally posted by planet10
Here is a dimensioned drawing based on the pdf of post 2.

Perhaps someone with MJK could model the line (assumming that the drive ris a stock VIFA and not a custom OEM)

dave

I'm definitely interested in this option, if somebody would like to help model it I would be most grateful. If the design ideas progress well there's a good chance I will build it. But this is beyond my ability to design and so I need some help.

The goal should be the best darn small-box DIY speaker ever made with a clean, smooth musical sound and enough bass to keep folks happy with the smaller box

[Bigun]

Originally posted by burnett
These are the Information I found across the net about the speakers:
Drivers:
Vifa D27TG-30-06 and M13WG-08-09

I didn't find much about these drivers anywhere. Choosing drivers is another learning curve for me. For example, how would the PMC drivers compare with, say, the Peereless range ?

[Julien]

My best guess is something very similar to:

http://www.tymphany.com/d27tg35-06

http://www.tymphany.com/m13sg-09-08