_____ HELP _____

[Audio Al]

HELP HELP , can anyone recommend a set of good quality Z plugs for a pair of Pulk audio :eek: speaker cables I have

I can then attempt to fit them :doh::eek:

[Firebottle]

Here you go Al, very easy to fit as they are screw terminated.

https://www.ebay.co.uk/itm/Divine-Audio-4mm-BFA-Z-Banana-Plugs-1-4-5mm-Cable-Entry-Pack-of-4/302201702164?hash=item465ca00714:g:wOwAAOSwnHZYkJV a

[Audio Al]

Here you go Al, very easy to fit as they are screw terminated.

https://www.ebay.co.uk/itm/Divine-Audio-4mm-BFA-Z-Banana-Plugs-1-4-5mm-Cable-Entry-Pack-of-4/302201702164?hash=item465ca00714:g:wOwAAOSwnHZYkJV a

Thanks Alan , do you know if the red and black covers screw on ?

[hifi_dave]

I often use similar. Yes, the covers screw on.

[Audio Al]

I often use similar. Yes, the covers screw on.

Thanks Dave , next question do you know if they go up the cable first or can you screw them on from the Z plug end after soldering / screwing the cable on ?

[karma67]

normally al,they screw on from the front.

[hifi_dave]

Connect cable and then the covers screw on from the plug end.

[Audio Al]

OK thanks , the cable ends look like this
.
.
.
https://live.staticflickr.com/65535/49816220938_7714cac678_k.jpg (https://flic.kr/p/2iU69V1)C01569AA-D266-4910-9C98-6DCACAFFDADF (https://flic.kr/p/2iU69V1) by , on Flickr

[walpurgis]

Those Litz speaker cables are worth more if left as they are and unmolested. They are now quite sought after and can fetch a few bob. They were made in Japan, but also marketed here by Monitor audio and I believe Monster in the late seventies. The sound quality can be remarkably good in the right system, but they can present a tricky load for some amplifiers. I've owned a couple of sets of these.

[Audio Al]

Those Litz speaker cables are worth more if left as they are and unmolested. They are now quite sought after and can fetch a few bob. They were made in Japan, but also marketed here by Monitor audio and I believe Monster in the late seventies. The sound quality can be remarkably good in the right system, but they can present a tricky load for some amplifiers. I've owned a couple of sets of these.

OK I may just use them as is with no Z plugs see what happens :eek:

[walpurgis]

Just remembered they were also sold in the US as the Polk Cobra. If you look on Hi-Fi Shark, you'll see there's a bit of a following.

https://www.hifishark.com/search?q=polk+cobra

[walpurgis]

Bit more info here: http://www.high-endaudio.com/RC-SpkrCab.html

[karma67]

yep otherwise known as amp killers lol

[walpurgis]

yep otherwise known as amp killers lol

Well you wouldn't choose them to go with old Naim amps, but I had mine sounding excellent with a valve job.

[Audio Al]

Well you wouldn't choose them to go with old Naim amps, but I had mine sounding excellent with a valve job.

Quad 11

Audio Innovations 500

Transcription audio

any of these suitable :scratch:

[walpurgis]

Should be OK. If a valve amp doesn't like a load it may sound soggy or make rude noises, but it's unlikely to pack up.

Quad 11's should work just fine, as the ESL's can be awkward to drive and they handle those OK.

I'd be happy using any valve amp actually.

[Audio Al]

Should be OK. If a valve amp doesn't like a load it may sound soggy or make rude noises, but it's unlikely to pack up.

Quad 11's should work just fine, as the ESL's can be awkward to drive and they handle those OK.

I'd be happy using any valve amp actually.

:) Thanks

[karma67]

have you tried these cables yet al?

[Audio Al]

have you tried these cables yet al?

No not yet I will one day but dont hold your breath :)

[karma67]

ah ok, what length are they?

[hifi_dave]

Definitely Monitor Audio cables and they did give some amps a hard time. Back in the day :wheniwasaboy: we used to make those up with ring main cable in parallel, taped together, with the ring main cable used for the bass driver and Litz for the HF.

[Barry]

Those cables were designed to have a characteristic impedance of around 8 Ohm, in the mistaken belief that in doing so they would 'match' the nominal impedance of the speaker. Interconnects cannot be treated as transmission lines at audio frequencies, because the concept of characteristic impedance does not apply at audio frequencies (or to any frequency where the wavelength is longer than 6x the cable length; for example at 10kHz, the wavelength is approximately 20km, so the cables would have to be over 3km long!).

To achieve the low characteristic impedance, the Monitor Audio cable uses a woven Litz construction: having a very high capacitance per unit length and a very low inductance per unit length. The latter is desirable the former is not, and can cause instability problems with some SS amps. However there ought not be any problem if used with a valve amplifier, nor should there be a problem if used with electrostatic speakers (provided of course the amplifier can drive ESLs).

[Audio Al]

ah ok, what length are they?

They are a 24 foot pair :eek: , Flat type :)

[karma67]

They are a 24 foot pair :eek: , Flat type :)

bloody hell! i wouldn't mind a loan if your feeling generous?

[Audio Al]

bloody hell! i wouldn't mind a loan if your feeling generous?

£ $ or Euros and how much :)

I had a nightmare trying to sent a parcel using the Post office , took me 2 days to find one that was open :doh:

This is my local main post office opening times


Heathway
28 The Mall, Heathway, Dagenham, Essex
RM10 8RE
How to find us
Opening times Normal Seasonal


Mon Closed
Tue Closed
Wed Closed
Thu Closed
Fri Closed
Sat Closed
Sun Closed

[Pharos]

Those cables were designed to have a characteristic impedance of around 8 Ohm, in the mistaken belief that in doing so they would 'match' the nominal impedance of the speaker. Interconnects cannot be treated as transmission lines at audio frequencies, because the concept of characteristic impedance does not apply at audio frequencies (or to any frequency where the wavelength is longer than 6x the cable length; for example at 10kHz, the wavelength is approximately 20km, so the cables would have to be over 3km long!).

To achieve the low characteristic impedance, the Monitor Audio cable uses a woven Litz construction: having a very high capacitance per unit length and a very low inductance per unit length. The latter is desirable the former is not, and can cause instability problems with some SS amps. However there ought not be any problem if used with a valve amplifier, nor should there be a problem if used with electrostatic speakers (provided of course the amplifier can drive ESLs).

I don't recognise your wavelength calculation.

To me it is much more relevant that transmission line theory applies when a source Z is equal to the load Z, and in audio signal transfer, both for signals and for power to the speakers, the source Z is many times less than the load Z, and so Xsmission theory does not apply.

I remember arguing this point with my then Telecoms lecturer in about '79.

[karma67]

£ $ or Euros and how much :)

I had a nightmare trying to sent a parcel using the Post office , took me 2 days to find one that was open :doh:

This is my local main post office opening times


Heathway
28 The Mall, Heathway, Dagenham, Essex
RM10 8RE
How to find us
Opening times Normal Seasonal


Mon Closed
Tue Closed
Wed Closed
Thu Closed
Fri Closed
Sat Closed
Sun Closed

so that's a no then ? :D