Model 760 - a new version of an old classic
Model 760, a personal favourite of mine, was basically a solid state version of the classic 41" cabinet covered in tolex and with casters.
While the original model PRO 900 was contained in a 54½", two-piece cabinet with built-in reverb, the 760 was very much the same basic speaker as the 147 or 122 - which is probably why it became so popular. The 760 has a 90W two-channel amplifier, with 45W for the bass and 35W for the treble. The audio signal is first routed through an active cross-over that sends the bass and treble to the designated amplifier channels.
Electro Music also issued a version of the 760 in a wood cabinet, model 770, combining the traditional look with the modern solid state innards. In the UK, model 770 was sometimes referred to as '760 Wood'. This speaker is still available from Hammond-Suzuki as model 971 with the 11pin hook-up and updated electronics.
Model 330 was issued in 1975. The concept is the same as model 760 - a classic horn/rotor speaker in a portable tolex-covered cabinet. The cabinet size is 37" with casters, i.e. roughly the same size as the older model 145. Technically this speaker is slightly different than the 760. The amplifier is a single channel 60W with a passive cross-over like in the old tube Leslies. This makes the 330 a popular Leslie to convert to tube amplification. Another noticeable difference is that the input socket is the modern 11pin type, making it necessary for the speaker to have a separate power cord (see below).
On the right is shown an early version of the 330 - the tag is the 'solid state' type logo with the red ProLine badge on the other side. Later ProLine Leslies had the ProLine moniker on the main badge in place of the 'solid state' wording that had become old news by the late 70's.
A Leslie 330 with the back panels removed. Note the passive cross-over, and that the top horn does not have the 'idler pulley' found in earlier Leslie speakers. The metal brackets mounted on the black heat-sink are for the power cord when not in use.
The even smaller model 860 is the smallest Leslie ever made with the true upper horn / lower rotor. This cubic lil' fella is quite loud despite its tiny measures. The amp is 120W and the hook-up is 11pin. It's great for guitar where the obvious lack of bass is not a problem. The horn is mounted on a slant shelf in order to make the cabinet narrower - back to front. The woofer (bass speaker) is the same 12" type found in model 825 and 820. Electro Music suggested that multiple cabinets of this model be stacked for more volume. For this purpose, metal cups were fitted in the top so that the castors on the cabinet on top would stay in place.
Above and below - sections of a Leslie 860 brochure
Geoff Williamson in Australia kindly donated this picture - this one has the later 'red dot' ProLine badge.
