hi there
I have a pair of vintage goodmans goodwood speakers that i have restored. i has the crossovers recapped with new caps of equal values, middle range quality. these are the speakers
Goodmans Goodwood - Singapore & Malaysia Hifi | Hifi Singapore | Hifi Malaysia | Singapore Hifi Products | Malaysia Hifi Products | Hifi Audio | Stereo Hifi | Used Audio Equipment | Used Hifi Equipment | New Audio Equipment | New Hifi Equipment | Use
i am disappointed that both the midrange units and tweeter units (more the midrange) sound rough and hard on the ears. I am a bit of a newbie, but have bought and sold and fiddled with quite a few speakers over the last couple of years and im very disappointed with how these sound. I dont know whether its the crossover or the units themselves. Can you advise me at all, as i am considering 4" audax mids , and audax tweeters as replacement units. Would the voice coils be 'gone' in the goodmans units, or could it be the coils on the crossovers themselves. I am at a bit of a loss ):
thanks a million in advance
patrick
I have a pair of vintage goodmans goodwood speakers that i have restored. i has the crossovers recapped with new caps of equal values, middle range quality. these are the speakers
Goodmans Goodwood - Singapore & Malaysia Hifi | Hifi Singapore | Hifi Malaysia | Singapore Hifi Products | Malaysia Hifi Products | Hifi Audio | Stereo Hifi | Used Audio Equipment | Used Hifi Equipment | New Audio Equipment | New Hifi Equipment | Use
i am disappointed that both the midrange units and tweeter units (more the midrange) sound rough and hard on the ears. I am a bit of a newbie, but have bought and sold and fiddled with quite a few speakers over the last couple of years and im very disappointed with how these sound. I dont know whether its the crossover or the units themselves. Can you advise me at all, as i am considering 4" audax mids , and audax tweeters as replacement units. Would the voice coils be 'gone' in the goodmans units, or could it be the coils on the crossovers themselves. I am at a bit of a loss ):
thanks a million in advance
patrick
How is the suspension on the middriver. If it is really stiff the surround may have dried and become so hard that the cone is not working properly.
Mid driver surrounds
Hi many thanks for quick reply. All the surrounds on these are the pvc variety and seem to all be moving ok I think . There's no perishing of any kind
Hi many thanks for quick reply. All the surrounds on these are the pvc variety and seem to all be moving ok I think . There's no perishing of any kind
hi Cal! thanks for the reply. ok here goes
firstly the midranges on both are 'overpowering' the tweeters' in terms of body and detail.
then the vocals are quite 'lispy' , and the general sound emitted from them is a little sore to my inner ears. its not a smooth sound, from mids up. its 'raspy' to my ears.
does that help at all Cal?
firstly the midranges on both are 'overpowering' the tweeters' in terms of body and detail.
then the vocals are quite 'lispy' , and the general sound emitted from them is a little sore to my inner ears. its not a smooth sound, from mids up. its 'raspy' to my ears.
does that help at all Cal?
also the replacement caps were mostly 'cross-caps' , the polypropylene type. the originals were electrolytic.
heres a link to what the originals look like
Lovely pair of 60's 70's GOODMANS 3 way speaker crossover crossovers, (146428) | eBay
heres a link to what the originals look like
Lovely pair of 60's 70's GOODMANS 3 way speaker crossover crossovers, (146428) | eBay
OK, so if bass is fine, you probably don't have a phase issue which can cause something like what you are describing.
If I understand your description, the 'lispy or raspy' sound is known as sibilance. Depending on the cause, you may not be able to do anything about it.
If the mid sounds ok but is simply too strong for your tastes, you can add an L-Pad. An L-pad is either two resistors or it can be a 'variable volume control'.
If I understand your description, the 'lispy or raspy' sound is known as sibilance. Depending on the cause, you may not be able to do anything about it.
If the mid sounds ok but is simply too strong for your tastes, you can add an L-Pad. An L-pad is either two resistors or it can be a 'variable volume control'.
Looks like a good crossover. 2nd order bass coil and 80uF cap, 4 element mid around 500Hz with 30uF and 8uF, and maybe third order tweeter cap/coil/cap.
Troels ended up giving a filter like that to a similar SEAS 503:
SEAS Kit 503
Changing the capacitors will have brightened the sound, maybe too much. Your main option is to add some resistance to take things down a bit as Cal says.
Troels ended up giving a filter like that to a similar SEAS 503:
SEAS Kit 503
Changing the capacitors will have brightened the sound, maybe too much. Your main option is to add some resistance to take things down a bit as Cal says.
hi Cal
well the bass could possibly be carrying some of the 'sibilence' as well, it might not be as apparent to my poor ears.
the mid sound isnt ok on both speakers, both the mids and the highs have that 'sibilence'
well the bass could possibly be carrying some of the 'sibilence' as well, it might not be as apparent to my poor ears.
the mid sound isnt ok on both speakers, both the mids and the highs have that 'sibilence'
hi Steve! cool thanks for that. unfortunately im not an electronics head, and my repair guy has done a runner on me ):
I am hoping what you are describing is not damage to the driver voice coils. Do you hear it at all volumes?
yes i think its at all volumes , it would be more apparent on louder volumes. i wouldnt have them up past quarter volume, they are pretty powerful speakers, lots of low end
hi cal
no ive had another set of these (without crossover upgrade), sold them recently. these model of speakers are good, there is definitely just something wrong
I didn't spend too much time on simulating it, but I don't think the capacitor change from NP types to MKP could have done a lot to possibly wreck things. We're looking at 0.5 to 1 ohm ESR change. Not much.
Big old heavy 12" woofers often sag and rub voicecoils with time. That sounds rough. Traditionally you rotate them 90 degrees for a quick fix, but maybe 180 degrees is doable here.
You might reflow some solder contacts in case there is a break somewhere. It's very easy to just put your hand over a tweeter or mid and listen to the other drivers on their own too. Usually tweeters fry first at parties and actually are easy enough to replace with something similar. Perhaps the voicecoils have turned into a bird's nest.
I've worked at the old Goodmans factory in Havant, Hampshire as it goes. I even applied for a job when I first came to Portsmouth, but they were past their hayday and moving production to China. It now distributes stylish and comfy mostly Indian cotton clothes to a familiar high street retailer. 🙂
Big old heavy 12" woofers often sag and rub voicecoils with time. That sounds rough. Traditionally you rotate them 90 degrees for a quick fix, but maybe 180 degrees is doable here.
You might reflow some solder contacts in case there is a break somewhere. It's very easy to just put your hand over a tweeter or mid and listen to the other drivers on their own too. Usually tweeters fry first at parties and actually are easy enough to replace with something similar. Perhaps the voicecoils have turned into a bird's nest.
I've worked at the old Goodmans factory in Havant, Hampshire as it goes. I even applied for a job when I first came to Portsmouth, but they were past their hayday and moving production to China. It now distributes stylish and comfy mostly Indian cotton clothes to a familiar high street retailer. 🙂
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