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Multi-Way Conventional loudspeakers with crossovers

Castle Harlech S2 front top (mid) driver x2 needed!
Castle Harlech S2 front top (mid) driver x2 needed!
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Old 27th June 2018, 02:48 PM   #11
chris661 is offline chris661  United Kingdom
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Quote:
Originally Posted by system7 View Post
People agonise over replacement drivers. Truth is they are all much the same. Seen one 5", you've pretty much seen them all.
Nonesense.
Zaph|Audio

Chris
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Old 4th February 2019, 11:28 AM   #12
dubplate007 is offline dubplate007  United Kingdom
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Default Castle Harlech replacement crossover and drivers

Hi Guys
Castle harlechs seem to be a pain ,i have a pair i wish to restore i have monacor sph 135 c drivers and will replace the vifa tweeter with a seas 27dfc as it crosses over at a low point 1800hz ,lroblem is can anyone help with the crossover section for the midbass? castle have listed the spec as 8 ohms that would mean the original woofers would be 16 ohms as they are wired in parallel configuration ,this wold mean i would have to change the values of the crossover to accommodate the monacor drivers at 4 ohms in parallel any suggestions would be welcome
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Old 4th February 2019, 01:09 PM   #13
EarlK is offline EarlK  Canada
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Quote:
Originally Posted by dubplate007 View Post
Hi Guys
Castle harlechs seem to be a pain ,i have a pair i wish to restore i have monacor sph 135 c drivers and will replace the vifa tweeter with a seas 27dfc as it crosses over at a low point 1800hz ,lroblem is can anyone help with the crossover section for the midbass? castle have listed the spec as 8 ohms that would mean the original woofers would be 16 ohms as they are wired in parallel configuration ,this wold mean i would have to change the values of the crossover to accommodate the monacor drivers at 4 ohms in parallel any suggestions would be welcome

You'll need to map out the original crossover before anyone can help you out.

Pull a network and follow the signal flow while writing down what connects to what.

As Steve has said, it's unknown whether or not the design is a 2.5 design or a straight 2.0 design.

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Old 4th February 2019, 01:19 PM   #14
dubplate007 is offline dubplate007  United Kingdom
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Hi Earlk
Thanks for the reply
it is a 2 way design on the harlechs ,if i am not mistaken the Howards at least the 1 model was a 2.5 way ....i have the crossovers out and the 2nd order mid bass has a 10 uf cap and im sure a 1.50mh inductor though i cannot be sure ...it also has a 7 watt 1ohm resister in line with the or parallel to the 10 uf capacitor
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Old 4th February 2019, 02:38 PM   #15
EarlK is offline EarlK  Canada
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If you have any of the original midwoofers get a dcr reading from one.

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Old 4th February 2019, 03:25 PM   #16
EarlK is offline EarlK  Canada
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Is this pic an accurate representation of your Harlech 2 crossover?

Castle Harlech S2 front top (mid) driver x2 needed!-dsc_0060_zps983c2dcc-jpg


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File Type: jpg DSC_0060_zps983c2dcc.jpg (109.2 KB, 64 views)
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Old 4th February 2019, 05:23 PM   #17
dubplate007 is offline dubplate007  United Kingdom
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No Karl they are indeed crossovers for the Harlech s2 unfortunately i have the original poly coned Harlechs i am trying to upload the crossovers bear with me
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Old 4th February 2019, 05:36 PM   #18
dubplate007 is offline dubplate007  United Kingdom
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By the way would that crossover work with the monacor units?
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Old 4th February 2019, 05:56 PM   #19
EarlK is offline EarlK  Canada
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Originally Posted by dubplate007 View Post
By the way would that crossover work with the monacor units?

The crossover (seen in the pic that I uploaded ) won't work with the Monacor Mid-Woofs & SEAS tweeter.

For the drivers just mentioned, you'll need an entirely new network.

The SEAS tweeter ( being @ 4 ohms ) & the 2x 8 ohm midwoofers are going to give you a load of @ 4 ohms ( once a network is designed ).

Since the original speaker ( is stated as an 8 ohm load ) it's easy money that the current network will not be of much use ( perhaps a part here + there might be salvaged ).


Last edited by EarlK; 4th February 2019 at 06:02 PM.
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Old 4th February 2019, 06:06 PM   #20
dubplate007 is offline dubplate007  United Kingdom
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Thought so ,Thanks Karl i will just have to keep plugging away until i find a design that suits both my drivers and the cabinets,should keep me busy for a while
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