I owned a pair in the late 1960s and liked them. Looking at images there were changes over the years. Mine had coated paper bass/mid. drivers and tweeters which had curved sides to them, with what looked soft domes.
Later models different bass/mids. and what I understand were Philips tweeters .
Did Goodmans initially use their own drivers, then buy them in?
Later models different bass/mids. and what I understand were Philips tweeters .
Did Goodmans initially use their own drivers, then buy them in?
Looks like a Phillips tweeter. Probably Goodmans own 8" bass. Small voicecoil on the bass which helps midrange quality. Picture attached at bottom.
Kei had a go at a restore: http://www.diyaudio.com/forums/multi-way/205387-goodmans-minister.html
Simple coil on bass, 4.7uF and 0.2mH shunt on tweeter, I expect.
This sort of thing led to designs like Monitor Audio's R252 and the R300/MD pictured:
Simple 1.6mH ferrite coil on 8" Elac paper bass, 2.2R and 3.3uF series with 0.27mH shunt on H0414-08 19TAF/G tweeter.
Quite acceptable sound.
Kei had a go at a restore: http://www.diyaudio.com/forums/multi-way/205387-goodmans-minister.html
Simple coil on bass, 4.7uF and 0.2mH shunt on tweeter, I expect.
This sort of thing led to designs like Monitor Audio's R252 and the R300/MD pictured:
An externally hosted image should be here but it was not working when we last tested it.
Simple 1.6mH ferrite coil on 8" Elac paper bass, 2.2R and 3.3uF series with 0.27mH shunt on H0414-08 19TAF/G tweeter.
Quite acceptable sound.
Attachments
Thanks.
The ones I am interested in have bass/mid. drivers with a large dustcap. The cone looks more like a coated poly. one.
They are on eBay and finish soon this Sunday.
The ones I am interested in have bass/mid. drivers with a large dustcap. The cone looks more like a coated poly. one.
They are on eBay and finish soon this Sunday.
regarding the Philips tweeter, Troels DIY page show how different mountings of the tweeter faceplate relative to the baffle affect frequency response.
If the crossover is just a single cap the tweeter will do nasty things around 1 kHz, here with a filter at 6 kHz that should be 18 dB down at 800 Hz but is about 2 dB down due to the large impedance peak.
Adding a 15-20 Ohm resistor across the tweeter will reduce that effect.
If the crossover is just a single cap the tweeter will do nasty things around 1 kHz, here with a filter at 6 kHz that should be 18 dB down at 800 Hz but is about 2 dB down due to the large impedance peak.
Adding a 15-20 Ohm resistor across the tweeter will reduce that effect.
I have now picked up these Goodmans Ministers.
The bass/mid. Drivers are different to any pictures I have seen on the Internet.
They have paper cones, plastic coated with flexible black plastic surrounds.
The label on the magnets have 'Made by Goodmans of England' stickers on the rear magnets.
The Goodmans made tweeters have blue stick on labels.
The same tweeters are used in other Goodmans speakers, such as the Magnum.
The bass/mids. are directly connected to the input terminals, with simple inductor/capacitor crossovers employed.
The cabinets are well filled with foam blocks, but no cabinet wall damping.
I haven't yet connected them up, but will be fairly soon.
The bass/mid. Drivers are different to any pictures I have seen on the Internet.
They have paper cones, plastic coated with flexible black plastic surrounds.
The label on the magnets have 'Made by Goodmans of England' stickers on the rear magnets.
The Goodmans made tweeters have blue stick on labels.
The same tweeters are used in other Goodmans speakers, such as the Magnum.
The bass/mids. are directly connected to the input terminals, with simple inductor/capacitor crossovers employed.
The cabinets are well filled with foam blocks, but no cabinet wall damping.
I haven't yet connected them up, but will be fairly soon.
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