Classic cars forum & vehicle restoration.

XL391 · Posted: Fri Mar 21, 2014 5:48 pm Post subject: Wiring an old stereo

Afternoon all,

As my electrical wizardry can be described as hopeless at best, I would like to ask for some advice if I may.

I have just bought an old Radiomobile 1095X which of course was only intended to power one speaker, one positive lead, one negative lead. If I'm fitting a pair of speakers to it, I am wondering if I attach the 2 positive wires, one from each speaker, to the single positive wire from the system and likewise for the negative set?
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Regards,

Will

1972 Daimler Sovereign 4.2 Series 1
1965 Sunbeam Tiger Mk1
1968 Triumph 1300

Phil - Nottingham · Joined: 01 Jan 2008 Posts: 1252 Location: Nottingham

Depends on the speakers impedance. The Radiomobile usually has 1 x 8 ohms so 2 8's connected in series will give 16 Ohms which will reduce volume.

If connected in parallel then 2 8's = 4 Ohms which may be too little and overload the amplifier though these radios are quite tolerant.

2 x 4 Ohms speakers in series via a balance control is better than 2 x 4 in parallel I think but radio experts will definitely know for sure.

Both must be equal though.

Most modern speakers are 4 Ohms
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Rover P2
Rover P4
Rover P5 & P5B
Land Rover S2 & S3
Morris Mini Traveller Mk2

XL391 · Posted: Fri Mar 21, 2014 11:29 pm Post subject:

Very helpful Phil, thank you for your reply. I'll try and avoid the fireworks show tomorrow... Wink

_________________
Regards,

Will

1972 Daimler Sovereign 4.2 Series 1
1965 Sunbeam Tiger Mk1
1968 Triumph 1300

Phil - Nottingham · Joined: 01 Jan 2008 Posts: 1252 Location: Nottingham

Rovers eg P5B's of the late 1960's & early 1970's had the Radiomobile 1095X which powered easily a front and large rear speaker via a double gang fader on the rear heater control panel on the transmission.

The tone and volume is excellent with the rear speaker full on and the front just down
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Rover P2
Rover P4
Rover P5 & P5B
Land Rover S2 & S3
Morris Mini Traveller Mk2

XL391 · Posted: Thu Apr 03, 2014 8:25 pm Post subject:

All installed now! I went for connecting them in series with the 2 speakers, one in either door without a balance control. My thanks go Phil for his help and advice.

_________________
Regards,

Will

1972 Daimler Sovereign 4.2 Series 1
1965 Sunbeam Tiger Mk1
1968 Triumph 1300