peter roest wrote:I found out <downloading> the SERVICE MANUAL VOX AC15HTVH that the EF 86 channel (in pentode mode, bass shift on pos.1 and brilliant switch on pos.0) is equal to the JMI
amp considering the old Jennings schematics.
The second channel is a clone of the AC30 (mine 1984) brilliant channel only both parts of the first ECC83 are parallel switched, otherwise there was a half ECC83 spare.
The poweramp (push-pull ECC83) and EL 84's are exactly the same. the only difference could be the output transformer.
I cannot give comment on the quality of both amps, only that my AC15CC1 (china made) is reliable
The second channel of the JMI is a tremolo channel, just like the tremolo channel in my Vox AC30.
In my opinion (I would never buy these amps) is the JMI very poor equiped.
Cheers Peter
Peter
According to the manual I have for the AC30H2L which I own the brilliance switch is pos 2 to match the original brilliance circuit and all the time I have played it the past 22 months I find that gives the early Shads tones and the bass cut is simply to help cut the muddiness when driving the amp harder I understand although I had a slight mod done to my brill switch to match it nearer the original circuit. Pos 1 the manual states gives a tone similar to the early AC30 Treble amps.
I have owned my chinese made Vox for nearly 2 years and apart from power / rectifier valve replacements it's given good service to date but I accept none of the modern amps have either the build quality of the older models and the components are not as good quality either. People on here have had problems with Blackstar and JMI for instance so it's not just Vox with quality control issues.