Speakers

[Pete Maddex]

Hi Chaps

Knocked these up just for a laugh, I bought the drivers and crossovers secondhand and made the cabinets from 12mm ply.

Speaker by Pete Maddex, on Flickr

Internals, note the brace and deadsheet, I wanted the cabinet to be as stiff as possible and they are.

Glue up by Pete Maddex, on Flickr

Crossover on the back its insulated from the deadsheet with some plastic from a 2L lemonade bottle, and holes cut out of the foil where the screws go through.

Crossover by Pete Maddex, on Flickr

Lashed together to see what they sounded like.

Speaker and Nait 1 by Pete Maddex, on Flickr

Sprayed satin black.

Black holes by Pete Maddex, on Flickr

They sound rather nice, I have tried them with my amp in the kitchen and a Class D digital amp using B&O modules.
I need to get them connected to my main amps but that means moving furniture and its a bit hot.

Pete

 

[Planeiron]

They look great. Wish I had the electronics skills to do this. Photos actually give the impression of the music playing!

 

[Sheffield Tony]

Hi Pete - how big are they ? I see they are a ported design; do you design the box / porting yourself ? It has always looked a bit of a black art to me !

 

[Cabinetman]

I’ve come across that type of insulation before but haven’t heard it called Deadsheet, presumably because that’s what it does? Is it the same stuff as is used in attic conversions? Ian

 

[Pete Maddex]

Hi Pete - how big are they ? I see they are a ported design; do you design the box / porting yourself ? It has always looked a bit of a black art to me !

Hi Tony
They are 250x200x180mm the front is 250x200mm. I was advised by the seller to tune the port to 50Hz so I entered the cabinet sizes and port diameter in to an on line port calculator which gave me the port length.

Pete

 

[Pete Maddex]

I’ve come across that type of insulation before but haven’t heard it called Deadsheet, presumably because that’s what it does? Is it the same stuff as is used in attic conversions? Ian

It’s usually used in cars as sound proofing it’s made from a tar like substance and aluminium foil.

Pete

 

[Pete Maddex]

They look great. Wish I had the electronics skills to do this. Photos actually give the impression of the music playing!

I am doing a 365 where I post a photo a day for a year and have chosen a Lensbaby sweet 35mm lens which gives you a sweet spot of focus which you can move around the frame and control the size.

Pete

 

[fuse]

Thats a bit more intentional than a laugh!
Very nice

 

[Woodbloke]

I've packed my Monitor Audio speakers and stands in the loft as they took up too much room - Rob

 

[Sheffield Tony]

Hi Tony
They are 250x200x180mm the front is 250x200mm. I was advised by the seller to tune the port to 50Hz so I entered the cabinet sizes and port diameter in to an on line port calculator which gave me the port length.

Pete

Ahh. Online calculators. That's useful. I am enough of a dinosaur that when I wanted to do this, there were no online calculators. In fact there was no "online" at all yet !

 

[Cabinetman]

I've packed my Monitor Audio speakers and stands in the loft as they took up too much room - Rob

Yes my Monitors went to my son, 4’ high and roughly 12 x 15 on the top, most impressive to listen to but covered in white Formica they were “of a period” shall we say. A copy of Cambridge R50’s I built back in 1976.
Ian

 

[AJB Temple]

This is a trip down memory lane. Years ago I built a pair of quite big speakers from some Hi-Fi magazine plans. Ported. Woofer mid and treble and a point to point wired fairly basic crossover. They served me very well until I got a bit more flush. I don't recall being able to buy sound deadening board at the time, but the internals had a rudimentary bracing arrangement. At the time there was a big thing about isolating the cabinets from the floor using adjustable pointy legs.

 

[Cabinetman]

This is a trip down memory lane. Years ago I built a pair of quite big speakers from some Hi-Fi magazine plans. Ported. Woofer mid and treble and a point to point wired fairly basic crossover. They served me very well until I got a bit more flush. I don't recall being able to buy sound deadening board at the time, but the internals had a rudimentary bracing arrangement. At the time there was a big thing about isolating the cabinets from the floor using adjustable pointy legs.

Yes these had those three plus a super tweeter all kef speakers, big port and the insides of the whole thing was covered in car underseal- dreadful stuff till it dried. Then the interior spaces were filled with a blue wool, special stuff that I can’t recall the name of.
But no pointy legs, they had a base made from 2x3 softwood.
Ian