Can anyone give me the specs/Info on these; Haybrook HB1

[JammyBStard]

I'm looking to build an amp that matches my loudspeakers, problem is I can't find any info on these speakers on the net; I got them of eBay a few years ago for £5 purely for their looks, but they turned out to be an excellent sounding pair and I haven't used anything else since.

They were sold to their original owner as part of a custom room settup with a TRIO KA-1500 so I guess they must be circa 1979ish which is older than me. I dont even know what impedance they are;

They are floor standing, no ports:

They are labled Heybrook HB1

And I think this sticker was put on by the system builder:

Any info apriciated

[poynton]

I would say they were Dynatrons NOT Heybrooks!
It's typical Dynatron 'style' or lack of it, depending on your tastes!

They usually had a fixed cable(through a hole in the back) with a DIN speaker plug.

The Heybrook plate looks like an afterthought.



: : Heybrook : :

The Heybrooks were a highly regarded speaker.


Andy



.

[tiefbassuebertr]

Originally Posted by JammyBStard

I'm looking to build an amp that matches my loudspeakers, problem is I can't find any info on these speakers on the net; I got them of eBay a few years ago for £5 purely for their looks, but they turned out to be an excellent sounding pair and I haven't used anything else since.

They were sold to their original owner as part of a custom room settup with a TRIO KA-1500 so I guess they must be circa 1979ish which is older than me. I dont even know what impedance they are;
Any info apriciated

I think you mean "Heybrook" (like photos), not Haybrook (like headline).
I would ask there:
Heybrook spare parts JPW spare parts Linn Isobarik Grilles
: : Heybrook : :
There are a wide range of the HB1-series. I think, your devices are one of the first released. If you don't get informations about puresound or the new owner of Heybrook, the type No of your transducers are helpful so as images of the crossover network. At newer versions SEAS are inside both by the bass and the tweeter.

[JammyBStard]

I just got this great response back from Guy Sargent from Puresound:

Very odd! It looks as though someone has taken the component parts of a pair of HB1's, ie drivers and crossovers, and fitted them within some (older?) Dynatron wood veneered floorstanding cabinets. The bass driver used in the HB1 was intended for sealed box use and fitting it to a cabinet of a larger volume as this appears to be, will give a little more bass extension.

I'm not sure the slots in front of the drivers will be doing the speakers any favours though. The original HB1's had flat open baffles and then used reticulated foam grilles so the dispersion was very good (& unrestricted). The impedance would be around 8 ohms. Bothe the woofer & tweeter were made by Vifa in Denmark and were 8 ohm units.

What does tend to fail after 15 - 20 years or so, are the foam surrounds around the edge of each bass driver. Once this happens, bass response deteriorates and as the driver is unable to move in and out in a purely pistonic manner, the voice coil may rub & give the effect of buzzing on some loud notes. Eventually, the insulation is worn through & the driver may short to the chassis or go open circuit.

I do regularly supply newly made Vifa M21 drivers to HB1 owners. They are 68 pounds each. It may be worth checking the condition of your surrounds.

I've attached a scan of the original HB1 brochure. They were a very popular award winning speaker in the 80's and early 90's. Many thousands of pairs were sold.

best rgs

Guy Sergeant
pure sound

That makes some sense because the cabs are extreamly well made, but the cut-out for the connection points is a bit ruff, I always thought that was odd given the general standard of the wood work.
Looks like I need to get the screw-drivers out!

Thanks All
J

[JammyBStard]

I'm currently using these speakers with a NAD3130 Amp, the souds a bit flat at reasonable volume but fantastic at high volume; is this essentilaly to do with the speakers? or is there anything that can be done at the power amp stage, to better match the speakers at lower volumes?

[IMG][/IMG]

[tiefbassuebertr]

Originally Posted by JammyBStard

I'm currently using these speakers with a NAD3130 Amp, the souds a bit flat at reasonable volume but fantastic at high volume; is this essentilaly to do with the speakers? or is there anything that can be done at the power amp stage, to better match the speakers at lower volumes?

[IMG][/IMG]

Check out, whether within the cabinet (enclosure) is filled too many damping material. If so, please reduce the quantity. This reduces the mechanical losses (and increases the parameter "QMC")
The same effect could be a result through the currently condition of surround foam material (only by your SEAS low frequency transducer). In this case you must replace the surround, even if by first look it seems good and not total damaged than of the photo of the following URL
http://marktplatz.nordclick.de/Produ...90901-r52.html

Independend of this you must replace all old caps from your 3130 integrated amp through such in top quality - this step will greatly enhance the sound quality.

[JammyBStard]

Originally Posted by tiefbassuebertr

Check out, whether within the cabinet (enclosure) is filled too many damping material. If so, please reduce the quantity. This reduces the mechanical losses (and increases the parameter "QMC")

I thought I would report back as got the speakers opened up last night; there was a small duvet of damping material inside the cabs; I've removed the whole lot for now and it's deffinatly made quite a difference less flat and muddy, but less bass overall; I think some major mods to the inside of the cabs might be in order to get the most out of these drivers.

Originally Posted by tiefbassuebertr

The same effect could be a result through the currently condition of surround foam material (only by your SEAS low frequency transducer). In this case you must replace the surround, even if by first look it seems good and not total damaged

A couple of people have mentioned the degradation of the surround on these particular drivers as a common problem after 15 years or so; but TBH if you told me these drivers were brand new I would believe you! perhaps they just didn't get used before they got to me!

Originally Posted by tiefbassuebertr

Independend of this you must replace all old caps from your 3130 integrated amp through such in top quality - this step will greatly enhance the sound quality.

Thats deffinatly going to happen soon, but I'm going to build a quick T-Amp first to keep me going while the NAD's in pieces.

Cheers Tief

[Studio Au]

Anyone know any info about the more modern Heybrook HB1

: : Heybrook : :



I have a pair of their kevlar mids and am trying to work out a sealed enclosure.

Many thanks if anyone know anything.

[tiefbassuebertr]

Originally Posted by Studio Au

Anyone know any info about the more modern Heybrook HB1
I have a pair of their kevlar mids and am trying to work out a sealed enclosure.
Many thanks if anyone know anything.

The use of a suited sealing plug (I don't the right name therefore in colloquial English) to close the vented port is a good solution. EPOS acoustics offer such an accessory by their earlier models.

According to the acoustic conditions and acoustic environment mostly the closed box sounded better (especially if small room sizes are present) and sometimes the vented.
This plug from EPOS acoustics consisted of solid foam.
If Heybrook don't offer such accessories for their loudspeakers, you must carry out a selfmade device (diy).